We have a builder doing an extension for us. We have been away whilst groundwork etc all been done and on return have found insulation was laid then cemented. Can see dpm around bottom but cannot see any insulation upstand. Is this a major issue and if so, can it be rectified now the cement is down ? Just after any helpful info before I inform builder. Regards and thank you in advance.
Perimeter insulation upstand
- Thread starter J Easty
- Start date
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Has it been inspected and passed, or inspected and then changed when the inspector left?
Get in touch with your building inspector, as yes it is an issue if there was supposed to be some there and there is not.
And whilst you're at it, tell your builder that you expect them to actually build to the approved plans and not just do what they like. To agree any deviations with you first (and you in turn agree those with your designer and inspector), and if they do deviate to work out how much of a cost saving there will be and knock it off the bill.
Get in touch with your building inspector, as yes it is an issue if there was supposed to be some there and there is not.
And whilst you're at it, tell your builder that you expect them to actually build to the approved plans and not just do what they like. To agree any deviations with you first (and you in turn agree those with your designer and inspector), and if they do deviate to work out how much of a cost saving there will be and knock it off the bill.
That's why I asked if it had been changed after being approved.
The classic is to show the inspector one thing and "Oh yes, pavlov has just gone to pick up the upstand and will be back in a bit to fit it".
Lack of upstand is not a workmanship issue, it's a non compliance issue if the design requires it.
And the bigger issue, which rings alarm bells is why are they not following the plans in the first place? What other shortcuts and omissions will they be doing?
The classic is to show the inspector one thing and "Oh yes, pavlov has just gone to pick up the upstand and will be back in a bit to fit it".
Lack of upstand is not a workmanship issue, it's a non compliance issue if the design requires it.
And the bigger issue, which rings alarm bells is why are they not following the plans in the first place? What other shortcuts and omissions will they be doing?
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Is that the finished floor or is there a screed to go on top? If it’s the finished floor, is the perimeter insulation under that bit of black dpm you can see in the pic? And all the way round covered by the edge crust of concrete over it
I rarely see jobs where the insulation goes under the concrete slab, although I know it can be.
I would have thought generally insulation above slab and under screed would be better as it reduces thermal mass
I would have thought generally insulation above slab and under screed would be better as it reduces thermal mass
Ive known builders to fit say 70mm celetex, and show the building inspector an offcut of 100mm 'oh yes gov, all 100mm in there'
Which gives you hotter rooms in the summer, and also removes the advantage of evening out room temperatures as the heating goes on and off, and the benefits of latent heat being retained and given off. So it's not better unless it's part of a overall property, insulation and heating design.
You'll have the 2am knock on the door by the hate-police if you're not careful
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