WHAT IS COLD BRIDGING?
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- เผยแพร่เมื่อ 7 ก.พ. 2025
- What is Cold bridging?
Cold bridges are weak spots in a building's envelope that allow heat to escape more easily. They form when materials with higher thermal conductivity create a "bridge" between the interior and exterior surfaces of a structure..
Here at SD Roberts Plastering & Wall Insulation in Warwickshire we help homeowners save on heating bills by installing effective thermal wall insulation systems. These old homes in Warwickshire are timeless and strong but unfortunately they are also susceptible to damp and cold due to lack of insulation
Roof eaves, window reveals and solid walls are some common examples and this is why you will often see us insulating these areas in older homes throughout Warwickshire..
We have built up a strong reputation in the area for delivering quality work that lasts and here are our customer reviews on Google:
g.co/kgs/Qy4UwjU
Do you live in Warwickshire? Do you have a cold home or problems with damp?
Get in touch here to arrange a no obligation survey 👇
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What is Cold bridging?
Cold bridges are weak spots in a building's envelope that allow heat to escape more easily. They form when materials with higher thermal conductivity create a "bridge" between the interior and exterior surfaces of a structure..
Here at SD Roberts Plastering & Wall Insulation in Warwickshire we help homeowners save on heating bills by installing effective thermal wall insulation systems. These old homes in Warwickshire are timeless and strong but unfortunately they are also susceptible to damp and cold due to lack of insulation
Roof eaves, window reveals and solid walls are some common examples and this is why you will often see us insulating these areas in older homes throughout Warwickshire..
We have built up a strong reputation in the area for delivering quality work that lasts and here are our customer reviews on Google:
g.co/kgs/Qy4UwjU
Do you live in Warwickshire? Do you have a cold home or problems with damp?
Get in touch here to arrange a no obligation survey 👇
form.123formbuilder.com/2387712/contact-lead-form
Nice job, look forward to seeing the finished product
I’m currently renovating a property for a customer and have done lots PIR and definitely lots of acoustic ceilings for them due to noisy upstairs neighbours.
Nice job , my advice, test for Asbestos every single plasterboard, some where made and mixed of white asbestos, I’m not talking about Artex , but actual plasterboard, there’s so much that people don’t know in this world.
My kitchen is really tight on space. Is it worth the effort of doing the external wall with the 6mm board that you have show in other videos ? It’s probably my only realistic option
@@mrs5850 Yes. The 6mm will eliminate condensation and mould issues and give a thermal uplift of between 25 - 30% on a solid wall
Wow, I think that you are the only installer I've found who attaches PIR boards to non-cavity solid walls (not saying you're wrong by any means, just trying to gather info). 1910 house, I've stripped 2 20ft external walls of the old lime plaster due to historic water damage and was going to batten with 2*2, infill with 50mm PIR and tape the edges, more 25mm PIR over the top then plasterboard and skim
Everyone has been screaming "interstitial mould, your floor joists will rot, use varour-open insulation!" so it's very confusing how to proceed. You don't seem to have any mould issues when using PIR on solid external non-cavity walls? You don't use any aluminium tape or a green vapour barrier?
Thanks for any advice you can give, buddy, you're my only hope :)
@@DrJohnners Hi thanks for watching.
You'll see in most of my video walk throughs even on historic buildings made up of lime or soft mortar it's very rare to find one intact. Meaning they usually have been tampered with to some degree as materials changed the repairs have modified these homes and it's been this way for decades in old homes.. Most have been repointed with cement mortar or have been cement rendered / pebble dashed with a rich mix of sand and cement. Even if the brickwork is well preserved externally the internal plaster in these old homes has usually been repaired to a large degree using cement, gypsum and DIY one coat filler. They almost never have breathable paints and they've been this way from the 70's or 80's so maybe 50 years or more.. and so as much as I'd love to say let's hack back this gypsum and cement, let's strip away this non breathable paint on the walls, lets repoint your home using the correct mixture of soft lime.. and let's use wood fibre insulation and lime plaster.. unless the customer budget allows and the homeowner is sympathetic to the history and fabric of the home its usually the PIR they want when comparing thermal resistance and loss of floor space / labour costs to install.
In regards to interstitial condensation developing in these type homes air tightness on these systems is important. Batton with air pocket is better than bonding the PIR in this case. Worth noting PIR has built in VCL. Providing joints are carefully sealed no need for foil overlay tape 👍 the external pointing and render should be carefully addressed to rule out penetrating damp on these buildings.
If you would like further information on breathable and vapour controlled IWI systems consider joining my online training course coming soon 👍
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@@SDRobertsPlastering Some solid info there, thanks so much for the response. Keep up the great vids, we're all watching, and for someone not in the trade but renovating an old house it's all amazing content! 👌
Yes you can fix IWI systems to all types of walls 👍
How do you stop the cold bridge moving higher, above the window above the bit you filled between rafters? By insulating from the top down above the roof space?
Yes. The loft insulation typically covers the wall plate 👍
Am I right that you put PIR boards straight on soild walls, i e. no cavity? I get conflicting information on this?
@@jonathanhat Hi, yes that is correct.
nice work. can you fix this insulated board to a plastered wall with cavity . wall has a 4" cavity with 2" insulation. house is 20 years old. wall is in good condition only cold in winter. walls are plastered blockwork.
Hi, yes you can 👍
hi. what was the thickness of the board you put between the rafters in the eaves, and did you maintain 50mm airflow? I take it that the underside was also thermal plasterboard to stop cold bridging through the timbers, could not tell from the video? Thanks.
@@aaronrothwell9026 50mm between + 35mm PIR plasterboard overlay yes gap for airflow was maintained 👍
is it ok to use no nonsense sticky foam adhesive/ or any other brand of foam adhesive around hot water pipes/gas pipes.
It's not ideal incase pipes ever need replacing / repairing. Pipe insulation sleeves better 👍
hi. what was the thickness of the board you put between the rafters in the eaves, and did you maintain 50mm airflow? I take it that the underside was also thermal plasterboard to stop cold bridging through the timbers, could not tell from the video? Thanks.
25mm airflow is acceptable in most situations. Yes insulated plasterboard was used to clad the timbers 👍