how to install cavity wall insulation. how to install kingspan insulation. how to install Jablite insulation. how to install 1200mm x 450mm cavity insulation
Thanks for this mate, exactly the info I was looking for as I'm blocking up a large window soon and laid lots of blocks garden walling and my single skin garage but never cavity. Great vid, cheers... Oh and I'm in Swansea so keeping it local like ;)
I’m putting 50mm kingspan in the cavity but my builder is recommending 100mm dritherm because he said the clips pop off on kingspan ..I’m sticking with kingspan as the u rating is better
Paul any change off plan always check with building control if it ok otherwise they may not pass is. The benefit of kingspan is usually you still have a cavity gap let the air flow .Good.luck
@@brickrightbuildinglandscaping just like hoovers have different power of suction the insulation boards have different u values as you know. Great video thanks for sharing. Also noticed there was a gap between the insulation board and inner leaf, is this a problem? Or should it be a tight fit between the outer leaf and inner ?
@DP-bo4yw As long as you check your boards with the specs on the plans and they are the same then if it's a different make it's fine .kingspan and celotex are brand names we use those names meaning insulation. As for the gap you mentioned spot on .install with no gaps the clips used are a bit hit and miss to be honest. It's also now since the video was made to tape the joints of the boards for maximum u value . Hope that helps you out 👍
So the bricklayers put the insulation in, as they are building the wall isit? I thought the brickys built the wall to the top, then the insulation gets added at the end
Maybe a 60 or 50mm board would be better .They like a ear air flow in the cavity here wales this job was a 45 mm clear air gap cavity. Id check the plan or at least ask the architect or building control or the council office for some guidance every area is different i can only comment on whats excepted here .hope thats ok . Good luck Justin 👍
Ok Shane You would need an inspection to clarify the specifications different parts of the country have different specs .Here in wales I used 100mm concrete blocks in and out with a 125mm cavity and the inundation boards were 75mm thick so for my area that is the specifications. Just check what works in your area first .hope that helps you mate good luck 👍👍
I've always had an issue with those red fixing disc things... they expand, contract expand again and fall off... why can't they have a little barbed prong on them that sinks into the insulation or something. I am so paranoid about this that I over-engineer things. Building control guy is happy that I sink nails into the sides of the batts, pointing upwards, then I squirt expanding foam on the back surface of the batt, slide it onto the sticking up nails and squeeze it firmly to the wall with various methods of keeping it tight to the wall so that the foam doesn't have a chance to expand but it glues it like mad to the blockwork. Then I stick nails in diagonally in the corner of the batts which finally galvanises the whole batt system as one glorious strong sheet. finally I put those stupid useless token red plastic discs on for show so they can fall off and fill the cavity....at least that would happen if I didn't run the aluminium tape over the joints and run it over the stupid red plastic discs. 😃
@@brickrightbuildinglandscaping Yeah I know they have the two gauge holes, but still - a tiny adjustment in the manufacturing process to leave one or two barbed prongs sticking out would make a universe of difference...the answer is so simple, an idea like that could make an entrepeneur on Dragons Den millions... and then I could sleep at night.
Horizontal wall ties every 750 mm and vertical every 450 mm . Also every 225mm at a window or door opening. Hope that helps you anything else let me no 👍
@@newry123 Hi So every course of blocks or every 3 courses of bricks which is 225mm add a wall tie so this is vertically. This is to strengthen the reveal at a door or window opening. Hope I've that helps 👍
@brickrightbuildinglandscaping Hi thanks for the fast response. If it was put on the external skin, would this mean that the build would not pass building regs?
@hugostiglitz4777 depends what the specs are in the building process timber frame or solid walls etc. In terms of the 50mm gap in solid work then yes but i have to say we follow the plans provided. Look up oakwood garden rooms on TH-cam liam has all the answers over there tell him justin @ Brickright sent you . Good luck 👍
@@brickrightbuildinglandscaping Thank you sir for your fast response. Just having a orangery installed at the moment and celotex insulation fitted behind the brickwork with the join spacers like you used here but definitely no barrier tape at all used? Will the building regs no this? Because they didn’t come out during the footings stage befor concreting install. Thank you for your time much appreciated 👌🙏
@squeelerjakeaxcradle7095 If you have any dought ask the builders or if you've payed for building regs. You can ask the building inspector for advice. Should of in my opinion been inspected before concrete footings go in if its listed as needing building regs . Good luck Justin 👍
Is full fill insulation such as rockwool easier to install then partial rigid boards? I can imagine the wall ties are a pain, and you can see that here. Rigid panels must be harder to get without gaps too?
I like the rigid better than rockwool stuff itches and gets in the eyes. Tape the joints so no gaps .ultimately its whats stipulated on the plans but rigid all day long for me 👍
why dident you insert a wall tie on top of the last course of blockwork before laying the course of brickwork.??it would have kept the in the insulation.????? at the top.
Is it normal to bend the wall ties up to slide in the pir, can they not be placed in without doing this? I couldnt see you bending them back down when you added the next row of pir?
Hi.Dan Bricklayers judt bend them as its easier to vet the insulation in without snagging on a wall tie thats all.bend em if you want or don't makes no issue either way . Thanks Dan Justin 👍
@@handle1196 No, this weakens them, obviously. Although maybe if it's only done once it might not be the end of of world, but they're bent up and then back down, not ideal. I'd also wonder if they are the correct strength of wall tie for the job, especially given the 125mm cavity.
I see brickies on TH-cam in London using insulation with out any foil on either side It's more like rock wool than insulation How is this getting passed Along with brick on the outside leaf Very strange
Yea the brick the outside first to to set out the brickwork then the internal blockwork goes in and the installation. Mostly in wales its the other way around because we use mostly foil backed installation which is clipped to the internal blockwork .just a different specification working in different areas of the uk .easier there way to set up brickwork first but i think foil backed installation like celotex or kingspan is better .Bricklayers just follow the drawing David . Justin 👍
![fellow fellow - PROUD feat. INK WARUNTORN [STRING QUARTET]](http://i.ytimg.com/vi/BQrVkMPTdHE/mqdefault.jpg)
Doing this right is so important for the comfort of the building and avoiding issues with mould from cold patches
Spot on 👍
Good to see builder's putting insulation right
It's such an important job to be done
Right
Correct and right
Great job
Thanks David 👍
Did he do it right? 😂
Great video. Can you please advise how to do this if there is access to the inner leaf from the outside?
@Lenka-gv2vs
Thanks .the video shows this or I'm I miss understanding 👍
Thanks for this mate, exactly the info I was looking for as I'm blocking up a large window soon and laid lots of blocks garden walling and my single skin garage but never cavity. Great vid, cheers... Oh and I'm in Swansea so keeping it local like ;)
I gave good info to a Jack what im i doing 🤣🤣🤣 no only joking hope it all goes well for you glad i could help you.
All the best
Justin 👍💯
Good job , even better if you tape the joints and clips with sticky silver tape which would seal everything off !
@cfclazio621
Agree but at the time it was specified on the plans 👍
Thanks for taking the time to do video , so you actually fasten insulation against inner cavity wall and not the external cavity wall ???
With this system yes 👍
Real nice tidy builder, thanks.
Appreciate your comment thanks 👍
Great video! Do you remember what thickness of insulation board you used and how wide the cavity was on this job? Cheers!
125mm cavity and 75mm boards i think it was 👍
Well done
I’m putting 50mm kingspan in the cavity but my builder is recommending 100mm dritherm because he said the clips pop off on kingspan ..I’m sticking with kingspan as the u rating is better
Paul any change off plan always check with building control if it ok otherwise they may not pass is.
The benefit of kingspan is usually you still have a cavity gap let the air flow .Good.luck
At the beginning you mentioned its kingspan. But the board branding is Unilin??
It's like calling vacuum cleaner a hoover it's all the same stuff just branding 👍
@@brickrightbuildinglandscaping just like hoovers have different power of suction the insulation boards have different u values as you know. Great video thanks for sharing. Also noticed there was a gap between the insulation board and inner leaf, is this a problem? Or should it be a tight fit between the outer leaf and inner ?
@DP-bo4yw
As long as you check your boards with the specs on the plans and they are the same then if it's a different make it's fine .kingspan and celotex are brand names we use those names meaning insulation.
As for the gap you mentioned spot on .install with no gaps the clips used are a bit hit and miss to be honest. It's also now since the video was made to tape the joints of the boards for maximum u value .
Hope that helps you out 👍
So the bricklayers put the insulation in, as they are building the wall isit?
I thought the brickys built the wall to the top, then the insulation gets added at the end
Yep built in as you go 👍
Is foil tape needed for the joints?
Id recommend you do yes 👍
which leaf is to the exterior? Can you put the insulation on the exterior leaf?
Opposite side to where im stood is the exterior.
Yes you can insulate from the outside skin but that is a totally different process
Wait. Shouldn't the insulation be snug against the inner leaf not the outer one?
It is on the inner leaf 👍
Can you use 75mm boards in a 100mm cavity?
Maybe a 60 or 50mm board would be better .They like a ear air flow in the cavity here wales this job was a 45 mm clear air gap cavity. Id check the plan or at least ask the architect or building control or the council office for some guidance every area is different i can only comment on whats excepted here .hope thats ok .
Good luck
Justin 👍
Are these insulation boards thick enough to pass regulations on housing efficiency?
Ok Shane
You would need an inspection to clarify the specifications different parts of the country have different specs .Here in wales I used 100mm concrete blocks in and out with a 125mm cavity and the inundation boards were 75mm thick so for my area that is the specifications. Just check what works in your area first .hope that helps you mate good luck 👍👍
I've always had an issue with those red fixing disc things... they expand, contract expand again and fall off... why can't they have a little barbed prong on them that sinks into the insulation or something.
I am so paranoid about this that I over-engineer things. Building control guy is happy that I sink nails into the sides of the batts, pointing upwards, then I squirt expanding foam on the back surface of the batt, slide it onto the sticking up nails and squeeze it firmly to the wall with various methods of keeping it tight to the wall so that the foam doesn't have a chance to expand but it glues it like mad to the blockwork. Then I stick nails in diagonally in the corner of the batts which finally galvanises the whole batt system as one glorious strong sheet.
finally I put those stupid useless token red plastic discs on for show so they can fall off and fill the cavity....at least that would happen if I didn't run the aluminium tape over the joints and run it over the stupid red plastic discs.
😃
The discs have two clips on them for different size ties but i do agree Nigel..they do come off now and then at least yours stay there nigel 👍
@@brickrightbuildinglandscaping Yeah I know they have the two gauge holes, but still - a tiny adjustment in the manufacturing process to leave one or two barbed prongs sticking out would make a universe of difference...the answer is so simple, an idea like that could make an entrepeneur on Dragons Den millions... and then I could sleep at night.
@nigelbrayshaw2709
Spot on 😂 they are very annoying at times arnt they nig but you are so right mate 👍 👏
how far do you space your wall ties,,cheers
Horizontal wall ties every 750 mm and vertical every 450 mm .
Also every 225mm at a window or door opening.
Hope that helps you anything else let me no 👍
@@brickrightbuildinglandscaping thanks forgetting back to me,do you see the 225mm at window and door openings ,is that horizontally
@@newry123
Hi
So every course of blocks or every 3 courses of bricks which is 225mm add a wall tie so this is vertically. This is to strengthen the reveal at a door or window opening.
Hope I've that helps 👍
@@brickrightbuildinglandscaping cheers
Does it matter if the insulation boards are attached to the external facing section of the cavity wall?
Should be internal skin 👍
@brickrightbuildinglandscaping Hi thanks for the fast response. If it was put on the external skin, would this mean that the build would not pass building regs?
How much gap have you left for airflow between block and insulation board?
50mm as per thr plans 👍
@@brickrightbuildinglandscaping I’m building a garden room using 50mm insulation boards, would I use a 50mm gap?
@hugostiglitz4777 depends what the specs are in the building process timber frame or solid walls etc.
In terms of the 50mm gap in solid work then yes but i have to say we follow the plans provided. Look up oakwood garden rooms on TH-cam liam has all the answers over there tell him justin @ Brickright sent you .
Good luck 👍
@@brickrightbuildinglandscaping I’m using double skin blockwork
@@brickrightbuildinglandscaping I have no plans as the building is not permitted development
Thanks nice video👍👌
Thanks very much
Justin 👍
👍👍
Does anyone ever use tape to seal the joints between the blocks of insulation?
Yes if that is stipulated on the plans 👍
Hi, is this important to have the joints taped for preventing damp area’s otherwise? Slightly concerned here?
@@squeelerjakeaxcradle7095
Tape is advisable it seals it and stops cold spots 👍
@@brickrightbuildinglandscaping Thank you sir for your fast response. Just having a orangery installed at the moment and celotex insulation fitted behind the brickwork with the join spacers like you used here but definitely no barrier tape at all used? Will the building regs no this? Because they didn’t come out during the footings stage befor concreting install. Thank you for your time much appreciated 👌🙏
@squeelerjakeaxcradle7095
If you have any dought ask the builders or if you've payed for building regs.
You can ask the building inspector for advice.
Should of in my opinion been inspected before concrete footings go in if its listed as needing building regs .
Good luck
Justin 👍
Is full fill insulation such as rockwool easier to install then partial rigid boards? I can imagine the wall ties are a pain, and you can see that here. Rigid panels must be harder to get without gaps too?
I like the rigid better than rockwool stuff itches and gets in the eyes. Tape the joints so no gaps .ultimately its whats stipulated on the plans but rigid all day long for me 👍
@@brickrightbuildinglandscaping Interesting, taping the joins makes sense. What's your thoughts on aircrete blocks?
why dident you insert a wall tie on top of the last course of blockwork before laying the course of brickwork.??it would have kept the in the insulation.????? at the top.
Hi Peter
Cant remember why i didn't was about a year ago but yes you have a point that makes sense there
Justin 👍
Is it normal to bend the wall ties up to slide in the pir, can they not be placed in without doing this? I couldnt see you bending them back down when you added the next row of pir?
Hi.Dan
Bricklayers judt bend them as its easier to vet the insulation in without snagging on a wall tie thats all.bend em if you want or don't makes no issue either way .
Thanks Dan
Justin 👍
@@brickrightbuildinglandscaping jhst checking that they bend back down ok after going up and still keep the gaps tight.
@@handle1196 No, this weakens them, obviously. Although maybe if it's only done once it might not be the end of of world, but they're bent up and then back down, not ideal. I'd also wonder if they are the correct strength of wall tie for the job, especially given the 125mm cavity.
is wall is able to bearing roof load
Its all been designed by an architect and structural engineer so yes 👍
What size is this sheet?
1200mm x 450mm and thickness will depend on your cavity size 👍
Where’s your aluminium tape brother?
Wasn't specified to use it was a few years back now .All changed now 👍
I see brickies on TH-cam in London using insulation with out any foil on either side
It's more like rock wool than insulation
How is this getting passed
Along with brick on the outside leaf
Very strange
Yea the brick the outside first to to set out the brickwork then the internal blockwork goes in and the installation. Mostly in wales its the other way around because we use mostly foil backed installation which is clipped to the internal blockwork .just a different specification working in different areas of the uk .easier there way to set up brickwork first but i think foil backed installation like celotex or kingspan is better .Bricklayers just follow the drawing David .
Justin 👍
Surely where the insulation joins it showuld be sealed either with some sort of waterproof glue or a after proof tape along the joins?
You can if stipulated on the plans tape the joins in the insulation which is now good practice charles.