Stratman

Another good idea. I'll discuss with him.

Good idea. He is all over the airtightness aspect fortunately.

He explained that the cable remains live until it gets to the inverter so it is to isolate the cables as close to the panels as possible for safety

Thanks - the TLC guide explains the issue well and how to overcome it. Discussed with installer and he has already compensated for the derating by increasing cable sizes from the panels to a rotary isolator in the loft space.

Hi there! Getting ready for roofing and in roof PV panels on our MBC build. PV installer says he'll run cables from the PV panels through laps in the roof felt, through the 400mm blown cellulose void between rafters (going in after) then through the vapour barrier below the rafters. Do you have any thoughts about this as I am a bit worried about cables overheating and causing a fire. Is this an accepted approach to cabling?

Good reccomendation thanks. I've found this one really informative. Lots of step by step detail and well edited: https://m.youtube.com/@TurningRosemountUpsideDown

I recently saw a refurb where the newels had been beautifully overclad in oak. i would never have known, it was so well done.

Not a deal breaker for building control, I agree, but if I provide ample accurate data, I expect them to use it. Also, to improve the result they suggested doubling up on PV which would have cost me unnecessarily.

I just got the design stage SAP report. Rather shocked at the predicted energy rating of C despite it being a build with high insulation, triple glazing, good airtightness , etc. So I read through the calculation worksheets to discover a load of errors. U values higher than the MBC thermal modelling that I sent them, MVHR completely ignored, generic oversized ASHP used, wrong building dimensions (like 30% greater floor areas and storey heights!). Entering the correct ASHP alone has dramatically improved the results and I have insisted they redo the whole report using the information I provided. Very poor effort. I suggest checking any report or calc you receive and don't be afraid to question and push back if it looks wrong to you. We pay good money for services like these.

This stuff is good: https://www.remlandcarpets.co.uk/commercial-flooring/entrance-matting/super-magnum-1m-2m-wide Ive used it a few times and it's thin enough to use without a well if adjacent to carpet, laminate, etc. just an edging strip.

Thank this is really useful. I will ask BCO about mist system as at the moment the sprinkler company is concerned that water pressure will be inadequate so will need a pump set and tank to the tune of several more grand cost.

Fantastic - thank you! And I see the pipes are just tucked over the battens below the VCL.

Hi There Looks like you didn't get any responses to your query. Did you get it resolved in the end? We will have vaulted ceilings upstairs and I just came across similar advice from the sprinkler company - actually 130mm void. Also in Wales by the way. The TF supplier is installing only 25mm service battens below the VCL to the underside of the roof joists. Does anyone out there have any experience or suggestions?

This manufacturer has guidance for fixing their channels in various conditions https://posiglaze.co.uk/

I think it's about 5mm plus 10mm carrier board on say 40mm vertical battens to ventilate the cavity. Have a look at the K Rend website for typical build up.