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Question . If I worry about my L shaped straps on my wall plate can I add twisted straps to be on safe side ? Or is it pointless ?

There will be insulation under the floor . I will run the DPM up the wall and past the DPC. It seems maybe better not to seal it and trim the dpm at screed level . I will just need to make sure plasterboard is 25mm off floor level. So there is ventilation if there is actually any damp rising.

Hello In my garage conversion , I can see the dpc. But it's trimmed against the wall . How do I connect the dpm to it before pouring screed/concrete ? Thanks

So you don't trim it to floor level after concrete is poured ?

Hello In my garage conversion , I can see the dpc. But it's trimmed against the wall . How do I connect the dpm to it before pouring screed/concrete ? Do I just paint blackjack all around the wall under and over the dpc and then run up dpm and overlap it ? Thanks

how do you make that area air tight? do you paint VCL on the inside of that area? Or not bother?

Hello I am still unclear if I need to make the space between the roof and the brick wall airtight? Do I paint some kind of liquid VCL membrane on the joists on the inside in this space?

I need to install a new water supply (32mm MDPE). In an ideal world, I would do it before laying my concrete floor but due to delays, I wonder if it's acceptable to use a duct and pull a MDPE pipe though at a later date? Is it difficult to pull the pipe? What about bends? Otherwise maybe I...

Thank you. I don't need to put liquid VCL such as https://www.soudal.co.uk/pro/products/coatings/air-and-vapourtight-coatings/soudatight-lq ?

Does the type of foam matter ? There's such a bewildering choice ....

Do I need foil tape or is it sufficient to foam the joists at the edges? I imagine it's a bit of a faff to foil tape all the way around each joist.

No. There is timber noggins between the joists at the edge. It's a small flat roof with 100mm x 47mm joists on top of a wooden wall plate . There is no cavities as it's a solid wall with Kingspan k5 on the exterior. I think I'm going to have to apply liquid membrane to make it all airtight...

I am building an solid brick extension and have a warm flat roof . The joists overhangs a bit. Then there is a fascia board. The plan was to put ewi all the way up into the fascia boards in between the joists ( in hindsight I should have built it differently to avoid joists and cold bridge -...

Some feedback! As per woody suspicion...it was indeed a drawing error by the structural engineer....

Thanks . Solid single block construction. External insulation. No suspended floors . All solid . I haven't seen gas membrane mentioned - I think it's mentioned standard DMP. I'll have to check with the structural engineer.

Under the installation is the damp proof course one block below this is the weep hole. This allows any rising damp below the DPC to escape. What I'm struggling to understand what is this weep hole looks like . My builder wants to put a air brick connected to a tube ...

I don't understand what kind of "weep holes at intervals" one block/brick below the dpc is? The structure isn't cavity and it's a solid concrete floor . Thank you