Duncan62

Thank you, supplier list: CVC systems BPC Anyone used: Paul heat recovery? Blauberg? 21 degrees?

Who did you use please?

The cheapest option is to cut you heating demand. This is done by cutting your heat loss from the building. This is primarily done with lots of insulation (very cheap to do) and triple glazed windows (very reasonable options exist). Solar orientation, building form and air tightness also have significant effects of heat loss. Is it simply money/month or do you value human comfort too? If you then follow the rabbit hole to its conclusion, you might consider building a certified PassivHaus.

Thank you. No not from my place, was an example i found of someone elses PH. We did exactly this, DPM on slab. Sole plate atop. Warranty instector was happy.

Appreciate that. And I agree. Finding it in non fencing sizes is not easy however. Also about 4x the cost. Pragmatism won out. UC2 used. End grain sealer on cut ends. DPM paint on top of the horizontal surfaces.

Literally having this issue now! I think counter battens should end early. So the drip tray can sit on the roof deck with a slight kick to the eaves board. The membrane sits on top of the tray. The vent sits on top of the membrane to allow air into the cavity behind the tiles, exciting at the ridge vents (and take moisture away from the building) The tiles then sit on top of the vent strips.

@ToughButterCup @the_r_sole @Gary M @markocosic @Dave Jones @joe90 what did you guys use for the battens please?

Help please! I have spec'd open face cladding - what USE CLASS specification should the batten and cross battens be? I am concerned I require UC3 treated wood (pressure treated to push preservative into the wood), and not UC2 which is easily available (green treated timber that is dipped, not pressure treated. i.e. roofing battens). Because open cladding means the battens will be subject to constant moisture - I think UC3 should be spec'd? Correct? Further info: https://www.jamesjones.co.uk/assets/uploads/files/treatment/tanalith-e-suppliers-guide.pdf Then we can get into actually finding this UC3 wood in sized like 25x50mm, 50x50mm or 50x100mm, I cant find it anywhere.

Have you looked at Norrsken?

Your Battens and counter battens - did you use UC2 treated or UC3 treated please?

That should be membrane. Yes certified: Rothoblaas Transpair Evo 160. I did the drawings. Roofer said single membrane. Will add butyl tape under each counter batten too. Belt and braces. Hopefully this sounds sensible?

Or very good carpenters are saying I should have 2 methane layers on the roof. First as a house wrap. Second draping between a counter batten, before the battens and tiles installed. Build up is: Insulation filled rafters External 60mm wood fibre insulation House wrap membrane Counter batten *Secondary membrane layer* Batten Tiles. Is this standard practice on a warm fit design? My thinking was a single membrane layer against the wood fibre?

Screws at 45 Deg will be behind the external closing so will not see them. Screws at 45 Deg take the weight of the woodfibre from sagging/bending the horizontal fasteners. I could change the 45deg ss flat head screw to a ss normal counter sink head instead.

Having searched - Fastener Types will be: GREEN 8.0 x 140mm T40 Spax Extra Long Washer Head Wood Screw, Stainless Steel RED / BLACK 8.0 x 180mm T40 Spax Extra Long Washer Head Wood Screw, Stainless Steel A2

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