Cold dot and dab walls

[HaveAgoActuary]

Hi all

I had an extension built this year and the builder is still carrying out the odd snag.

With the recent cold weather I’ve noticed the new rooms of the extension do not retain heat as well as the rest of the house (1930s semi with no cavity wall insulation). I would’ve thought the new rooms would hold heat well given they meet building reg insulation guidelines.

Online research seems to suggest the cold rooms could be down to the dot and dab not having continuous strips of adhesive near the floor and ceilings. Also there is no continuous adhesive around sockets which are also cold to touch. The builder has confirmed he did not use a continuous strip and seemed off when I suggested he should’ve basically saying “he’d always done it this way” and that the airflow shouldn’t be an issue.

The manufacturers website for the plasterboard says a continuous strip should be used when directly bonding to block work.

What I wanted to check is if this is actually a really shoddy piece of work my builder has carried out and something I should push back on with regards to payment/insisting he resolves? Or if I’m just being petty and although not by the book this is standard practice.

Edit: I should probably add we also have some sound proofing issues in the extension between floors that seem to be worse near external walls. I’m not sure if this could also be related?

Any help would be appreciated.

Thanks.

 

[tell80]

On a short course at British Gypsum we were told that: The main reason for continuous strips at the bottom and the top was as a fire & smoke precaution and for drafts secondary.

 

[HaveAgoActuary]

Thanks tell80. Is the lack of fire and smoke precaution enough to be concerned about or more a belt and braces approach?