Back on the self-build waggon...

Looking good mate 👍

Few more up to date photos, 18 bags of plaster later. Aside from installing the blind, fireplace and TV on the wall where all the sockets and aerial point is, i won't be doing any more this year, drying the plaster out became a huge problem, i ended up sat around for hours while the basecoat pulled in, and moisture was getting in places id rather it not be, like the loft. Pretty much all dried out now after the cold dry weather arrived and had dehumidifier on to top up the MVHR's effort.

 

 

 

 

 

 

 

 

I was under the impression that a warm roof was one where the insulation was totally above the roof not between the rafters. Is this incorrect?

Warm roof is above and between the rafters. Hybrid is between and under rafters. Both give a warm loft space. A warm roof doesn’t need the air ventilation that a hybrid roof needs. 
 

You are spot on, I personally just divide the roof construction into warm/cold and its definitely not cold. You'll start to run into more questions with BCO when you start using phrases like 'Hybrid', as long as you are using a BBA approved build up, then its already pre-approved with BCO.

Did you ventilate the roof?

11 hours ago, Susie said:

Warm roof is above and between the rafters. Hybrid is between and under rafters. Both give a warm loft space. A warm roof doesn’t need the air ventilation that a hybrid roof needs. 
 

 

no such thing as a hybrid roof.

 

warm roof requires a real VCL layer brought down onto the walls and not punctured by downlighters etc. Taping insulation IS NOT a VCL and wont work especially in high moisture areas like  kitchens. 

2 hours ago, ETC said:

Did you ventilate the roof?

 

Yes, 25mm air gap as standard

1 hour ago, Dave Jones said:

 

no such thing as a hybrid roof.

 

warm roof requires a real VCL layer brought down onto the walls and not punctured by downlighters etc. Taping insulation IS NOT a VCL and wont work especially in high moisture areas like  kitchens. 

 

This isn't correct, you can use foil tape to form a VCL, and since i've done this myself i know its done right.

 

https://www.kingspan.com/gb/en/knowledge-articles/what-is-the-purpose-of-a-vapour-control-layer/

 

Quote

Foil-faced insulation – foil-faced insulations may be used as a VCL provided all joints are properly taped with a suitable foil tape. Standard duct tape will not do the job

 

43 minutes ago, MikeGrahamT21 said:

 

This isn't correct, you can use foil tape to form a VCL, and since i've done this myself i know its done right.

 

https://www.kingspan.com/gb/en/knowledge-articles/what-is-the-purpose-of-a-vapour-control-layer/

 

 

 

how are you using that tape to seal against the wall junction ?

 

It's not an approved method its a bodge.

 

Use a real VCL and seal the roof properly, that means no cuts and sealed onto the internal walls.

Just now, Dave Jones said:

 

how are you using that tape to seal against the wall junction ?

 

It's not an approved method its a bodge.

 

Use a real VCL and seal the roof properly, that means no cuts and sealed onto the internal walls.

 

You wouldn't use foil tape to make the join to the masonry, it wouldn't stick properly for a start. The masonry is pre-primed with airtight primer, and then in this case I used Tyvek Airtight Tape to make the seal. At the top of the roof, the insulation butted up to the timber wall plate, so I used the foil tape here to make the join as it adhered fine.