How to fit insulation 2023 to the latest Building regulations Part L

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  • เผยแพร่เมื่อ 30 ธ.ค. 2024

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  • @ukconstruction
    @ukconstruction  2 ปีที่แล้ว +17

    Follow me on Instagram search Robin Clevett

    • @craig5832
      @craig5832 2 ปีที่แล้ว

      Would 100mm PIR between rafters + 40mm phenolic over the top good enough for the new regs with gapotape? also I wish this gapotape was a bit cheaper 😂 Space is very tight in this retrofit

    • @ukconstruction
      @ukconstruction  2 ปีที่แล้ว +1

      @@craig5832 that would be perfect!!

  • @smudgesmudger3989
    @smudgesmudger3989 2 ปีที่แล้ว +91

    Robin, I'm a chartered surveyor and construction manager. This is one of the most object lessons in how to properly insulate a roof that I have come across in 35 years of working in the industry. The insulation nightmares I have witnessed are beyond belief and further raise questions as to how the local building control folk signing them off as acceptable. Many thanks for the good work and fabulous videos.

    • @ukconstruction
      @ukconstruction  2 ปีที่แล้ว +8

      Thats for your message, I really appreciate you watching my video and taking the time to comment! Let's hope that we can all drive for better standards in the future!!

    • @eminencerecords6049
      @eminencerecords6049 2 ปีที่แล้ว

      Hi I’m doing a building surveying degree do you have any job opportunities please

    • @richardgallagher4880
      @richardgallagher4880 2 ปีที่แล้ว +1

      And this is why the average house price is 300k🙄

    • @tomcardale5596
      @tomcardale5596 2 ปีที่แล้ว +8

      @@richardgallagher4880 the value of most houses in the UK is driven by availability more than the cost of building it.
      The building cost might make up 1/3rd the cost if you're lucky.
      Making planning less restrictive and building standards higher and everyone wins.

    • @johnovegas
      @johnovegas ปีที่แล้ว +4

      what about venting the valley rafters..

  • @kunid
    @kunid ปีที่แล้ว +31

    A couple of things that makes Robin standout amongst other tradesmen, is his meticulous attention to detail (planning layouts with considerations of the materials, minimising waste, installation efficiency), and being a master at creating tools to multiply his productivity. The latter quality shows up repeatedly in his other videos. A true craftsman!

    • @TeeTee-zm2re
      @TeeTee-zm2re ปีที่แล้ว +1

      You gotta have the big bucks to hire robin clever

    • @weeeeehhhhh
      @weeeeehhhhh 10 หลายเดือนก่อน

      @@TeeTee-zm2re I was thinking of the cost of this work. The gappo tape alone easily added a few thousand to the build, but the money saved in heating, and the comfort of living in a temperature controlled environment is priceless.

    • @dragonfitter
      @dragonfitter 10 หลายเดือนก่อน

      Yeah but he is charging 600 quid a day so it would be

    • @SarahMikeChase
      @SarahMikeChase 3 หลายเดือนก่อน

      While it saves on insulation doing 450mm centres you get waste on plasterboard🤷🏻‍♂️

  • @rhysarthur3378
    @rhysarthur3378 ปีที่แล้ว +4

    See this guy is a professional all the people I’ve worked with are the type to just stuff it in and cut corners etc this is guy doing it properly

  • @buck8441
    @buck8441 2 ปีที่แล้ว +120

    Brilliant job, if only all builder’s aimed for your standard of workmanship.

    • @Jimjam2912
      @Jimjam2912 2 ปีที่แล้ว +17

      Let me guess ,you went with the cheapest quote and got what you paid for

    • @davecowan9466
      @davecowan9466 2 ปีที่แล้ว +21

      @@Jimjam2912 You think by not going with the cheapest all builders will then go to his level of detail……delusional if you think that 😂

    • @mattmanwaring1308
      @mattmanwaring1308 2 ปีที่แล้ว +2

      Trouble is most having got the time he has

    • @baptist18
      @baptist18 2 ปีที่แล้ว +1

      Get what you pay for

    • @husher5142
      @husher5142 2 ปีที่แล้ว +1

      most will do whatever you pay them for

  • @RichiRothschild
    @RichiRothschild ปีที่แล้ว +1

    I'm a property developer.. And this is the cleanest loft site, i have ever seen 💎

  • @paulrogers3814
    @paulrogers3814 2 ปีที่แล้ว +15

    If ever there was a game change it’s at 6.00 - 7.00 in the video - absolutely fantastic work Robin 👍
    This needs to be shown to builders, architects, designers and specifiers around the world 🌎

  • @AfricanSouthernCross
    @AfricanSouthernCross 2 ปีที่แล้ว +4

    I’m not a builder but this video is so good to see as a homeowner who wants his or her home warm, thank you so much for taking the t8me to upload this!

  • @stephencollins7714
    @stephencollins7714 2 ปีที่แล้ว +38

    Amazing attention to detail as always, what an absolute credit to the industry you are Robin. I used Gapotape in my self build garden room and it is great for amateurs like myself who cannot hope to achieve the levels of precision that a professional such as yourself does. I found it really challenging to try and minimise waste across metric and imperial materials but can see that it is very achievable with sufficient forethought.

    • @ukconstruction
      @ukconstruction  2 ปีที่แล้ว +3

      Much appreciated!

    • @bhwh_h
      @bhwh_h 2 ปีที่แล้ว +2

      I’m in the setting out / planning stage of a similar garden room project. Really liking the idea of 450mm centres for wall studs and rafters. But can’t see how this doesn’t leave me cutting the outer sheets of OSB down by about 105mm if boarded horizontally.
      It seems to me that whatever option you take, you end up with cuts somewhere!
      But I am preferring the idea of 2 neat cuts on the PIR (giving 3 x 400mm pieces) and a small amount of waste on the OSB. Plus for corners, the 100mm will give me enough for overlaps.

  • @Oli-tm6hu
    @Oli-tm6hu 2 ปีที่แล้ว +35

    Absolutely top work, it's great to have people like you setting such a fine example. For me the way to take it to the next level would be to demonstrate the same level of workmanship and diligence with insulation products such as wood fibre and cork, which have the added benefit of being biodegradable and non-toxic.
    It would be really interesting to hear your thoughts on using those kind of materials and even more amazing to see people with your profile and reputation demonstrating their application.

    • @hughmarcus1
      @hughmarcus1 2 ปีที่แล้ว +4

      Lots of architects & specifiers want PIR because on paper it’s got the best U values. They forget those values were obtained in a lab.
      Few installers go to the level of detail seen here, so in practice there’s loads of gaps, around which air flows. Thus in practice the PIR is seriously compromised & other solutions would actually give a better result in real world conditions.

    • @phoephoe795
      @phoephoe795 2 ปีที่แล้ว +1

      How is the fire-risk on wood-fibre and cork?

    • @stephencollins9062
      @stephencollins9062 2 ปีที่แล้ว +2

      @@phoephoe795 good it Burns super well

  • @funny-video-YouTube-channel
    @funny-video-YouTube-channel 2 ปีที่แล้ว +3

    Good job !
    Tape for the gaps is the correct method.
    Construction material manufacturers are making good money with such tape, because it works !

  • @christopherhoare9469
    @christopherhoare9469 2 ปีที่แล้ว +4

    I used the gapo tape for first time few months ago. Really is a game changer.

  • @Ireallydunnomuch
    @Ireallydunnomuch 2 ปีที่แล้ว +3

    This is so dreamy to someone who has been renovating an old property where all the rafters are at different spacings, many different widths from top to bottom and some a bit twisted too. Every single piece was a custom size and we used a lot of low expansion flexible air tight foam. Nice once done though!

  • @terrymanthorpe1454
    @terrymanthorpe1454 ปีที่แล้ว +1

    Your work makes me fill like a cowboy even though I was trained by Taylor Woodrow , in my tool bag was a Canadian distance saw, saw set an a saw file , claw hammer Nail bar, hand brace , wheel brace nail punch and a bro ll for masonry holes , yanky screwdriver , wooden mallet jack plain and block plain , roofing square , combination square , bevel and l level , plumb bob and a set of chisels , and a big tub of tallow , animal fat , and a pencil, can you imagine if a tool thief broke into my van , I really can’t think what he would take , probably the bottles of beer ,, love your show and thank you 🙏

    • @ukconstruction
      @ukconstruction  ปีที่แล้ว +2

      Your no cowboy!! just being able to identify some of your tools let alone be able to use them is a real skill!! Thanks for watching and commenting, from one fellow carpenter to another.

    • @terrymanthorpe1454
      @terrymanthorpe1454 ปีที่แล้ว +1

      I forgot my coping saw and Spoke shave , I remember when I got my first estwing hammer with the leather handle, I took it to bed with me and when I made my own frog and walked around the site as a tradesman I was very proud, I’m now retired and it’s loverly to watch the new generation ‘ I did the stair case for what they call the Franklin hotel now in knightsbridge ; it was two stair wells from basement to roof , all by hand and I did all the first and second fix for the Control tower Gatwick were I parked my car outside the control tower and Brighton to London in one hour with my tools on a motor cycle , as wages were amazing I ended up with owning six house , I loved carpenter , but it never made the money I made on property,

  • @clivewilliams3661
    @clivewilliams3661 2 ปีที่แล้ว +6

    I have often specified two layers of multifoil to create a warm roof. The top layer is used as a sarking material and the lower layer is fitted under the rafters and up the cheeks to create the 25mm air space between the lower layer and the internal cladding board. If required the cladding board can be an insulation board and/or plasterboard etc. There is no requirement for ventilation of the rafter voids as they are all fully sealed and airtight and because the multifoil is very much a vapour barrier, no moist air from below can get into the space. Using multifoil has the advantage of allowing the depth of the rafters to be as minimal as is structurally necessary since they don't have to accommodate thick insulation and ventlilated air space. therefore, any perceived cost extra of the insulation material is more than offset by the reduction in roof timberwork. Using multifoil also means that it is simple to seal all the joints together rather than having to resort to the complication of specialist tapes. This type of roof insulation is common in Alpine regions and has been successfully used for many years.

    • @scotland1380
      @scotland1380 2 ปีที่แล้ว

      @J C and expanding foam

  • @amanuelablel3364
    @amanuelablel3364 2 ปีที่แล้ว

    Your voice says it all, so passionate, wish all builders had that attitude

  • @lewisvalori2533
    @lewisvalori2533 2 ปีที่แล้ว +17

    Very informative and useful video! Great work. I just had one question, why don't you set the insulation boards flush with the underside of the rafters? You showed the rafters clad over with thinner insulation board to provide another vapour barrier and prevent thermal bridging, but I just wondered what the purpose of the airgap between the layers of insulation was? I realise you want to leave an airgap on the 'cold' side to the underside of the felt, but are you best to leave a gap between the layers? or can the two touch eachother?

  • @MrClem877
    @MrClem877 2 ปีที่แล้ว +7

    Great work Robin. As a long in the tooth building control surveyor it does my heart good to see you so clearly demonstrating a text book practical method to achieve Reg’s compliance. This sort of guidance should be mandatory viewing if we are serious about creating some quality housing that will meet the new part L standards in June. So often the standards drafted by the govt boffins are lost in translation on site - keep up the good work👍🏻

    • @ukconstruction
      @ukconstruction  2 ปีที่แล้ว

      Thank you Trevor, I really appreciate your time to view and comment on my video, especially as you are a building control surveyor!! I respect the building regulations and I have always enjoyed working closely with the LABC and some great Approved inspectors too!!

    • @handycrowd
      @handycrowd 2 ปีที่แล้ว

      Love that.. "lost in translation", how true. See so many good ideas get bodged on site by folks just chasing the money...

  • @harveysmith100
    @harveysmith100 2 ปีที่แล้ว +3

    I have seen your video before about cutting and fitting PIR sheets using Gappo tape. I love your set up and the jigs you use.
    As I have said before, I am just a rough old trowel but I did a kitchen refurb last month, I made jigs up for drilling for the handles. The customer was amazed at how perfect it all looked when I finished.
    Thanks for sharing this wisdom Robin. Jigs save time in the long run and reduce stress so much.

  • @gibbodive140
    @gibbodive140 2 ปีที่แล้ว +17

    You may wish to move the thermostat to another position in the middle of the room away from the window for more accurate results ?
    That way it will not be affected by possible direct solar gains or to a less extent marginal cooling from the window/glass ?
    Excellent work as always. Shame we do not see this level of pride more often.

  • @noumanali343
    @noumanali343 2 ปีที่แล้ว

    Impressive work I am working last 2 years in the UK as a structural engineer I have a lot of issues with the builder regarding the regulation. They did not follow the regulations for saving the cost but you give very good lesson quality is the best key to success.

  • @jjames1950
    @jjames1950 2 ปีที่แล้ว +2

    Would this be the same concept for a suspended floor on the ground floor with a large full house usable basement? As in using the gapotape between the floor joists?

  • @sb544
    @sb544 2 ปีที่แล้ว

    Look at the quality of this guys workmanship - Unreal

  • @DavidJohnson-yg8qm
    @DavidJohnson-yg8qm ปีที่แล้ว +1

    Looking at the standard of workmanship, I think it is about time a degree qualification is available. Superb quality and a good guide to how loft insulation should now be installed. Just putting down rockwool over the ceilings these days is really not good enough is it.

    • @SandrAnswers777
      @SandrAnswers777 11 หลายเดือนก่อน

      Hear, hear, otherwise a licence to build obtained with proof of certification in craftsmanship

  • @buck8441
    @buck8441 2 ปีที่แล้ว +2

    Great job, how I wish all insulation was fitted like that ! , Just a observation, I noticed that the insulation between the rafters was not flush with the face of the rafter, so when the next layer went on was there a air gap between the two insulations….

  • @joewentworth7856
    @joewentworth7856 ปีที่แล้ว +1

    looks great. but i was surprised to see the thick PIR pushed back into the rafters 20 to 30 mm from the face. When you cover this over with 25 mm over sheet does that space not make a convection space? I would think minimising the gap would give better performance?

  • @King-Arthur-The-First
    @King-Arthur-The-First ปีที่แล้ว +1

    Fantastically professional.
    Thank you so much. For this video.

  • @MikeDawsonArt
    @MikeDawsonArt 2 ปีที่แล้ว +1

    That is next level expert thinking. Love it!

  • @geoffbell4895
    @geoffbell4895 หลายเดือนก่อน

    Very good but I was hoping on guidance regarding need to an air gap ( kingspan suggest 50mm) between insulation and underside of roof tiles or felt if fitted. My project involves insulation an old property.

  • @KennyEvansUK
    @KennyEvansUK 2 ปีที่แล้ว +4

    This is what's known in the trade as a 'proper job'. Sadly there are not many out there with Robin's integrity and skill.

    • @dragonfitter
      @dragonfitter 10 หลายเดือนก่อน

      Most of the time people won’t pay for that

  • @chrisbabbitt4202
    @chrisbabbitt4202 2 ปีที่แล้ว +5

    This build is looking absolutely brilliant! Well done.

  • @mariusgheta2141
    @mariusgheta2141 ปีที่แล้ว

    BRILIANT JOB, thank you very much for all information, you have a good day!

  • @westwonic
    @westwonic 2 ปีที่แล้ว +4

    Great job, one question: why is the pushed-in insulation not flush with the bottom of the rafters?

    • @williamjamesconstruction7694
      @williamjamesconstruction7694 2 ปีที่แล้ว

      i was wondering this also, along with other commentators, but i guess Robin does not have the time to answer all questions

  • @chardonian1
    @chardonian1 2 ปีที่แล้ว

    Brilliant.As I've said before 'The Clevett Standard'!!!! Cheers Robin

  • @oliverfisk4204
    @oliverfisk4204 2 ปีที่แล้ว +2

    Superb workmanship. As someone working on a significant DIY refurb/conversion, this is a level of quality I would love to aim for. Thanks for sharing.

  • @bbashers
    @bbashers 2 ปีที่แล้ว +1

    This is absolutely the best way to do roofs, unlike my current 3year old roof build which was a shoddy as your "how noyt to do it" piece and still signed off by NHBC!

  • @j444nsy4
    @j444nsy4 2 ปีที่แล้ว +12

    Mate that set up for the pir cutting was unbelievable. And of course the festool saw. I didn’t see one bit of that yellow dust floating about. It seems long winded the whole set up and tape but I bet it’s so much faster in the long run. True craftsman…… 👌🏻

  • @williambeard5526
    @williambeard5526 2 ปีที่แล้ว +2

    Hi Robin.
    Im looking at insulating the roof space on our 1960s ish dormer bunaglow. At present it has no insulation apart from what looks like some wool type insulation thats stuck to the roof membrane and has heavily rotted away over time. The roof is made up of what looks like 3x2 from wall plate to ridge with 120x50 loft floor beams that run from the front to the back of the house for the loft floor and bedroom ceilings.
    My plan would be to add additional rafters from wall plate to ridge to add extra space so I could use 100mm PIR insulation like you have so I have an air gap and then add another skin as you did for the extra layer also using the gapotape as it looks like a good idea then carry the 100mm over the top of the bedrooms ie the dormer roof in between the rafters, I cant add anymore layers in the bedrooms as I havent the ceiling height over the windows. Very expensive but needs doing.
    So my question
    Your first layer of thick PIR, did you push that all the way into the rafters so it touches the roof membrane or did you leave an air gap between the roof membrane and the PIR and did you leave an air gap between both layers of PIR?
    The PIR against the walls was that pushed all the way to the wall also?
    Love the videos Robin, always watch yourself and roger always something to learn.

  • @guyrandom7861
    @guyrandom7861 2 ปีที่แล้ว +4

    Amazing craftsmanship and attention to detail.
    If only building codes were as strict in the states my house wouldn’t be so cold/hot all the time, insulation and proper air sealing is still an afterthought.

    • @carlb401
      @carlb401 2 ปีที่แล้ว +1

      That is what amazes me with your building codes, the fact that some states don't have any or the fact there is no national standard like here in the UK. Then when some states mainly the colder ones do have codes some do not even require insulation under concrete slabs. Yet here in the uk which is not as cold as the USA, we are require to use a minimum of 100mm / 4 inches of insulation under a concrete slab.

  • @duncanabbot8352
    @duncanabbot8352 2 ปีที่แล้ว +1

    Brilliant! I am about to do an extension and now I know a lot more about the insulation challenges. Thank you.

  • @jackofspades69
    @jackofspades69 2 ปีที่แล้ว +8

    Just amazing. Do you always put a 25mm insulation barrier on to protect the cold joists affecting the plaster board? Have you left an air gap between the outer skin of the roof behind the main purpose? Thanks again for a great video

  • @brianlopez8855
    @brianlopez8855 2 ปีที่แล้ว

    I have done the board insulation and every board is cut to size with rafters at 400 centres 350 gaps to meet each rafter space. E It is dirty dusty job but worth doing properly., I never use the tape as they are trimmed and trimmed until they fit tight and stay in of their own accord. Nice looking job Robin.

  • @michaelwaite4367
    @michaelwaite4367 ปีที่แล้ว +1

    Hi there I notice you've set the pir about an inch or so not flush from the rafter. Is this the best way?

  • @belucky9630
    @belucky9630 8 วันที่ผ่านมา

    What happens when you cut the lights in? Do you cut the whole bit of insulation out for the lights? Interesting to see what needs to be done?

  • @AAW-Electrics
    @AAW-Electrics หลายเดือนก่อน

    15:56 - Looks amazing, but what are you doing with the ~50mm gap between your 1st insulation and the skin insulation...? Do you leave this as air? or do you fill it will the thinner stuff before skinning it over please? Just curious, thanks.

  • @mrdeafa25
    @mrdeafa25 2 ปีที่แล้ว +1

    Whenever I can't sleep, I watch this.

  • @michalmajercik4957
    @michalmajercik4957 2 ปีที่แล้ว +1

    That’s how to do it insulation properly.Good job mate 👍

  • @brandonwhitham2105
    @brandonwhitham2105 2 ปีที่แล้ว

    This is outstanding quality of workmanship!

  • @williamlawrenson8345
    @williamlawrenson8345 2 หลายเดือนก่อน

    When you put the PIR between the joists, do you leave an air gap behind it to allow air to flow between it and the roof membrane?

  • @utensil999
    @utensil999 2 ปีที่แล้ว

    Just watched this a second time. Excellent stuff robin.

  • @Scott-cm8sv
    @Scott-cm8sv ปีที่แล้ว +1

    Great video, the gapo tape was new to me!
    The only thing I think you should make clear is how important the ventilation gap is behind the insulation board. The rafters looked to be 200mm (?), so a 100mm board had plenty of space. That’s not always the case and I noticed your guy had pushed the board back at least 50mm in places. With a smaller rafter that would push the board right against the felt. ‘Best practice’ would be to only push the insulation just a little further beyond the bottom edge of the rafter in most situations.
    This will also avoid having a vented gap top and bottom that will reduce the performance of the insulation layer.
    That aside, good video 👍👍

  • @Festivejelly
    @Festivejelly ปีที่แล้ว

    Presumably the insulation between the beams doesnt go flush against the fabric? How do you maintain a gap?

  • @neilnash2383
    @neilnash2383 ปีที่แล้ว

    Really great workmanship absolutely amazing

  • @mastermcgrath2613
    @mastermcgrath2613 2 ปีที่แล้ว +3

    Robin you are brilliant - I just can't get why some comment asking the STUPID questions that if the actually LISTENED you have covered.
    Those who know the price of everything and the value of nothing - I for one will use this for my future specifications, changing the roof sizing is genius why is 450 not the standard? 🙏🏼 thank you

  • @jeremysaunders9916
    @jeremysaunders9916 2 ปีที่แล้ว

    Great to see a real professional at work with attention to detail 👏

  • @JimJimpmjj
    @JimJimpmjj 2 ปีที่แล้ว +1

    What a truly skilled craftsman you are sir, Fantastic attention to detail. Just a pleasure to watch, and thank you for sharing your knowledge and information 👍👍👍👍👍🍻

  • @4321nugget
    @4321nugget 2 ปีที่แล้ว

    Do you need a vented ridge tile between each Raffer as the air can't move along the ridge as blocked by wood?

  • @steamsearcher
    @steamsearcher 2 ปีที่แล้ว

    I am working in 100 mm PIR to most of our 70 year old house. Aslo much Multifoil.
    So far the Gas supplier is not happy... Dec to January at £10.00 is not funny to them.
    Yes our roof is the very last to loose the snow when we get some.
    Many walls still to do. Lovely video. Love the bench. Bodgeit and Scarper Reading.

  • @grahamdavidson9492
    @grahamdavidson9492 ปีที่แล้ว

    Amazing attention to detail and consideration for using up material to reduce wastage, costs and the environment. Not seen Robins work before but that was enlightening and what the whole building industry should be considering for every element of house building.

  • @MorrisseyOner
    @MorrisseyOner ปีที่แล้ว

    I live in Texas on the gulf coast. Our insulation is only on the floor of the attic. Can i just keep the foam boards/radiant barrier as whole and screw them to the wood, which would leave channels for air flow? my goal is just to keep the attic from being 140 degrees F and help the AC work easier.

  • @tonywinters403
    @tonywinters403 2 ปีที่แล้ว

    Bravo! Love the data collection to back it up.

  • @oussamaelhussein4367
    @oussamaelhussein4367 11 หลายเดือนก่อน +1

    Amazing honest builder.. 👏

  • @DelH555
    @DelH555 2 ปีที่แล้ว

    If I ever build another home I know exactly who I want to build it! Your eye for detail is plainly remarkable and would embarrass even the best of builders knocking about the country. Also I found this video one of the most satisfying yet, yes I know it is only insulation but I bet you could heat that roof space with 4 wax candles in the winter time! Beautiful work.

  • @martinmc9830
    @martinmc9830 หลายเดือนก่อน

    Q. The rafter pir boards (with the gappo tape on the sides) seem to be recessed, so when you put your second layer of pir over the top wont there be a second air gap between the two pir layers? If this is deliberate why do you do this? Thanks

  • @mykehoole5787
    @mykehoole5787 ปีที่แล้ว

    I really enjoyed this video, it’s great to see your attention to detail especially the compound cuts you made on the PIR and the way you minimised wastage.
    The old adage of “If it looks right, it probably is right” comes to mind and the finished result looked very good.
    If only all builders were as conscientious.
    The Bluetooth connected thermometer you used is a great tool, I keep one in my caravan to trend the temperature and humidity to monitor it over winter.

  • @philipoakley5498
    @philipoakley5498 ปีที่แล้ว

    Lovely video of some great techniques.
    My only query was that when inserting the insulation slabs between the rafters it looked as if they were pushed in past the flush position that would leave ~10-20 mm gap when the second insulation was applied. Is that gap designed in, planned or desired? I was expecting the the two would be 'kissing' each other.

    • @Multiboxes
      @Multiboxes ปีที่แล้ว

      I thought the same. In other videos I’ve seen it’s fitted flush with the outer edge.

  • @andrewgalliver498
    @andrewgalliver498 2 ปีที่แล้ว +1

    Hi robin, very good video. Steady camera and good sound. Cld i ask sm advice please...i have a newly built single storey extension with a vaulted ceiling. I plan to use the techniques you have outlined in your video as per the insulation. Cld you explain the insulation joint from the cavity wall using Rockwool or similar to the PIR board maintaining the 25mm air gap? I can see in you have built an small PIR upstand from the wall plate to meet the ceiling PIR but is there any more fitting detail behind this to seal with the cavity insulation? Also, i have 4 Velux windows across the width of the roof. The 2 areas directly above the windows, which meet with the house, are not ventilated from the wall plate as the other areas are. My roofer used a breathable membrane. Is this an area to be concerned about and if so could you offer some advice on how to vent these spaces please. Thanks again.Andy. (Swindon,Wilts)

    • @andrewgalliver498
      @andrewgalliver498 2 ปีที่แล้ว +1

      Anybody hv a response to these questions Andrew is asking?

  • @thetessellater9163
    @thetessellater9163 2 ปีที่แล้ว +1

    When I started my career, it was 50mm of fibreglass wool in between rafters; never saw rockwool until a few years in !!

    • @westwonic
      @westwonic 2 ปีที่แล้ว

      The house I bought in 1991 was built in 1959, and had 25mm (1 inch) thick fibreglass insulation between the ceiling joints.

  • @eddjordan2399
    @eddjordan2399 2 ปีที่แล้ว +1

    cracking job. thats why i like ybs as you stickit over the whole roof then cross batten then any internal voids can be done with rockwool the real stuff. and vapor p board. out of interest how do deal with humidity in your air tight buildings trickle vents and air heat recovery?

  • @davidlawlor4317
    @davidlawlor4317 ปีที่แล้ว

    I was a big fan of cutting the PIR crooked with a rusty Spear and Jackson before stamping it between the rafters.

  • @chrisjames1924
    @chrisjames1924 2 ปีที่แล้ว

    I’ve been doing a Victorian property with roof still in place. It has non breathable bitumen felt so I’ve left a 50mm gap. Would you put holes in ridge board for air to pass over from eaves to eaves? Also, when placing PIR boards between rafters do you push them down to the top of floor joists or do you cut around the end joist to let the board make contact with wall plate? It’s weird installing insulation with a roof still on. Not something I’m used to! With cost of living crisis there will be a lot of people with older properties tackling this by themselves and if you don’t get ventilation correct you can wreak havoc with the integrity of your roof. It’s a minefield with older properties.

  • @nikcolettejones8876
    @nikcolettejones8876 2 หลายเดือนก่อน +1

    Where do you find the tape and PIR insulation?

  • @waynegaskell
    @waynegaskell ปีที่แล้ว +1

    Informative thank you sir :) - so to close off the air-gap debate, you have an air-gap on the diagonal section of the roof, but on the vertical walls there's no gap and fitted flush ? I do have a scenario myself. I have under house storage with joists at the ceiling leading to the tongue and groove flooring. I keep reading conflicting information on whether an arigap is needed in this instance. What are your thoughts please? (have have 100mm boards waiting to rock n roll) :)

    • @ukconstruction
      @ukconstruction  ปีที่แล้ว

      If there is a ventilated space naturally like a traditional suspended ground floor from air bricks then simply insulate between the joists, I would check with your building inspector if this is official works as even they have differing veiws!!

  • @keithtraa
    @keithtraa 2 ปีที่แล้ว

    WOW! I'm impressed! Very Good job!

  • @jesshothersall
    @jesshothersall ปีที่แล้ว

    Thank you for such a thorough explanation of everything!

  • @seven4seven
    @seven4seven 2 ปีที่แล้ว

    Forget submitting photos of your workmanship, this video is evidence enough for the building regs!

  • @denishurley1358
    @denishurley1358 ปีที่แล้ว +1

    Hi Robin, Great video. How do you attach the plasterboard after this? Do you screw it into the rafter?
    How did you attach the outer thinner insulation layer ?

  • @DZTechNet
    @DZTechNet 2 ปีที่แล้ว

    Outstanding comprehensive presentation, well done!!

  • @ooooobpbpbpooooo
    @ooooobpbpbpooooo 9 หลายเดือนก่อน

    Love your videos, and the commitment to doing a thorough job. I'm learning about roofing and intrigued by the differences of opinion between experts when it comes to cold and hybrid roofs, regarding running of cables and air ventilation.
    In this video, the between-rafters PIR is installed a few mm back into the void from the rafter edge, and it is mentioned a second PIR layer will be added across all rafters internally.
    - Is this to run cables?
    - What will happen to air moisture between the PIR layers?
    Thanks!

  • @sirpatrickspens
    @sirpatrickspens 14 วันที่ผ่านมา

    I’m in Australia where most houses don’t even have insulation as regulations are about 40 years behind the UK, and the most common comment I’ve heard over the years is, “it doesn’t get cold enough for insulation” … they seriously hadn’t even considered it for heat resistance.
    Anyway, my quick question is what do you have in the underside of the roof tiles? I can see something but not sure what it is.
    Assuming it’s some kind of membrane and I won’t be able to remove tiles, any idea how I can install something like that - or can I do without it??

  • @noahleno
    @noahleno 2 ปีที่แล้ว +2

    What an beautiful job you did there. Such attention to detail. Your years of experience and love of the craft make it look so easy. So inspiring, great work!!

  • @gusolive
    @gusolive 2 ปีที่แล้ว +1

    THAT WAS AWESOME!

  • @fiercefix
    @fiercefix 2 ปีที่แล้ว

    Really can't see many builders doing this job to this spec. I think getting a firm in to spray foam the lot like they do on canal boats is the answer to this ball ache of a job. Fair play to you for your top work here.

  • @keithburton7516
    @keithburton7516 2 ปีที่แล้ว +1

    Very clever to put 450 centres in. Never seen such attention to detail on insulation. Expect no less that that from you though. Thanks for showing us how to do it correctly. I like spray foam myself. Love your passion and skill.

  • @TheBarnylondon
    @TheBarnylondon 2 ปีที่แล้ว

    Ha Robin .... Im Barny we a bit of work together maybe 32 odd year ago over banstead way , glad to see you still at it as am i , but more chilled now. i did a huge loft about 6 years back and it was passed to use tried-iso which was totally wrapped inside being very careful to do as per. The loft has stayed warm in winter and cool in summer , the heating costs rose in proportion to the size and no vapour issues. I reckon it saved me a week in labour time . Its a shame the councils don't like it . Cheers barny

    • @ukconstruction
      @ukconstruction  2 ปีที่แล้ว +1

      Hi Barney!! Great to hear from you!! Its been a long time for sure!! I have used foil wrapped roll insulation like Tri-iso before and in some retro fit situations it the only way!! Its good on top of the rafters too, be good to bump into you mate at some point!!

  • @joshdaviesbespoketimberstr2028
    @joshdaviesbespoketimberstr2028 2 ปีที่แล้ว +8

    I've been waiting patiently for this video to come out and it was well worth it. Incredible precision. After watching your earlier videos on the ISC240 and Gapotape I went out and got myself one to insulate our self build barn conversion. Definitely helps, the insulation is a tight fit and the dust is minimised and I can sell the ISC240 on afterwards. However, I wander if people will begin to lean towards warm roof construction in light of new building regs? It will certainly cut down on PIR install time, create a warmer diaphragm (IMO) and neglect the need for (no offence) expensive products like Gapotape. I think in hindsight I would have gone for a warm roof construction. Thanks again RC.

  • @marlonlake511
    @marlonlake511 ปีที่แล้ว

    I'm just insulating my raffter now with 50mm insulating leaving a 50mm gap and noticed getting alot of condensation on roof felt what is breathable and plenty of airflow from eves

    • @ukconstruction
      @ukconstruction  ปีที่แล้ว

      I suspect that warm air is making its way onto the cold side this happens a lot, maybe have a good look and see if there are any large gaps from the heated side of the construction??

  • @Mikey__R
    @Mikey__R 2 ปีที่แล้ว +1

    I notice the rafters are proud of the insulation between them by what looks like 25mm or so? Does this mean there's going to be a gap between this first skin of insulation when you fix the second skin to the edge of each rafter?

  • @partytime3778
    @partytime3778 2 ปีที่แล้ว +1

    I must admit your workmanship is superb.
    All these regulations keep changing and at the end of the day are we just adding to make more problems in the future. Just get the balance wrong and years down the road, dry rot.
    I noticed your guy pushed the PIR into the rafters and recessed them about half to one inch further than the face edge. If you put another insulation flush with the rafter there is going to be a gap between the two insulation from top to bottom of the roof. Will moisture build up between that gap.
    I'm insulating my loft at the moment and have done it the same way as you, now I wonder if the PIR should be pushed in, flush with the rafter edge so it's touching the other insulation.

    • @ukconstruction
      @ukconstruction  2 ปีที่แล้ว +2

      there will always be a gap just by the nature of the PIR not being that flat or the way it holds when pushed in, this small air space acts more like a double glazed unit according to an engineer that designed a structure for me some time back and I tend to do this most times, as far as moisture.... the moisture should not really get past the vapour barrier that is formed by either a dedicated membrane, or in our case a really well installed under rafter PIR That is well taped etc

  • @shaunglendinning
    @shaunglendinning 2 ปีที่แล้ว +1

    Great video Lads! That's the way roofs and lofts should be insulated, Well done!

  • @SteveWardellDIY
    @SteveWardellDIY 2 ปีที่แล้ว

    Lovely preparation and accuracy in this work. A rare treat to see there are people out there that take the trouble to do a job well.

  • @BarneysArmy82
    @BarneysArmy82 ปีที่แล้ว

    Might be a silly question but I live in a council flat and I have the whole loft, I didn't want to go all out as it would cost thousands plus the council probably wouldn't let me do it..the question is can I possibly use carpet underlay and tacky it to the felt lining? I would then just cover the sides up properly. I just wanted it for my drum kit to go up there and just make it warmer. I used to be a carpet fitter and can get the hyperlay which is quite thick.

  • @robgardiner2343
    @robgardiner2343 2 ปีที่แล้ว

    Everyone would love this type of finish a job.. as a builder of 30 years it's easy spending other people's money..
    Mr builder come into the real world..

    • @ukconstruction
      @ukconstruction  2 ปีที่แล้ว

      Hi Rob, I still can do my work competitively indeed I was not the most expensive price this client had, the difference is we get well set up and the work is profitable for us and more economical for my clients, all our work is on a price we just choose to do the best we can

  • @Thomas-p9f1h
    @Thomas-p9f1h 2 หลายเดือนก่อน

    Do you cut the foam slightly bigger than the rafter gap and it holds itself in ?

  • @danthechippie4439
    @danthechippie4439 2 หลายเดือนก่อน

    Hi Robin, It's a fantastic job as always.
    I noticed you put a second skin on the rafters, is it necessary to do the same to the walls?
    When you push the insulation into the raters do you leave them flush to the inside leaving an air gap between the insulation and the roof, and if so what size gap should would you recommend? Obviously that gap will determine what thickness insulation can be used.
    Cheers Robin

  • @paulbishop4005
    @paulbishop4005 ปีที่แล้ว

    Minimizing surface area reduces heat loss. In this case insulation above ceiling rather than just up to the roof ridge.

  • @moosmum01
    @moosmum01 2 หลายเดือนก่อน

    What a great watch that was. Thank you so much. Can I just ask.. Is it OK to do this on old prefab buildings? I'm conscious of the drawbacks of spray foaming roofs, and wonder if this would have the same problems?
    Thanks ☺️

  • @muddyfunker3014
    @muddyfunker3014 2 ปีที่แล้ว +2

    Amazing channel. Love your skill.
    The insulation for that roof probably costs more than my house 🤣

  • @djsconstruction9448
    @djsconstruction9448 2 ปีที่แล้ว

    Hi Robin I follow longtime great work really appreciate all your efforts thanks

  • @ridgmont61
    @ridgmont61 2 ปีที่แล้ว

    That roof is a thing of beauty.