Mike_scotland

So do you know what the qall u valur will be?

Hi My builder saying he will change the walls to 140mm celotex pir at 0.023, what sort of u values will this produce? Currently 0.22 with 140mm of frametherm. Cheers Much Thanks Mike

Anyone know the rough cost of upgrading your insulation?

The horiztonal part is to be 420mm(420mm in 2 layers over flat ceiling at F/F level) of wool i think and the sloping part is 150 PIR Insulation between rafters 20 PIR Insulation over rafters.

Do you reckon add another 100mm of wool insulation to the walls? Or whats your suggestion? Is it floor and walls that need looked at? The roof is 0.12 but its a 1.5 storey sort of thing so that will be our walls upstairs.

I think i need a sit down with the builder and the architect, i told them i want a good insulated house. The ASHP wont be very effective if insulation so crap.

How do you mean? Would it help the sap or make it worse?

I think its a nibe

See these

The outside enviroment area, could be the above the attached garage. Its something lile that downstairs in size.

145 i think it is Panels inc OSB to G/F Spandrel Panels inc OSB to F/F Panels inc OSB to F/F 145x45mm C16 solepate, headbinder etc 140 Frametherm 32 in ext walls Window stops / cavity closers Mid floor joists, assumed JJI's 150mm wool between joists 150 PIR Insulation between rafters 20 PIR Insulation over rafters 420mm in 2 layers over flat ceiling at F/F level 22mm V313 chipboard flooring to F/F Roof trusses 19mm Sarking to trusses

Yeh i get it, We are going ASHP so want good insulation, we are coming in at 82B i think it is for SAP rating. 83Bfor environment. So for clarity if we put more insulation in it would perhaps be a 85B or such like? I have seen in one of the recommendations if we got a wind turbine it would increase us to 98A haha!

I didn't think it was that good. What is a gppd raring for floor?

Im not 100% sure yet its a TF definitely. What is the exposed floor meaning? TF with blockwork and render is think its 140mm of wool. Slab is 100mm pir below and 50 above. all relatively new to me so looking for advice.

We got our u values back.... thoughts? Walls 0.22 (i think quite poor sounding) Ground - 0.15 0.14 exposed floor?? 0.12 - roof Any thoughts? Sound ok bar the walls.

Thank you, all a learning experience for us.

Is it better having 150mm in the concrete slab? Rather than above? I think they need insulation above to clip the UFH piping too.

It is concrete slab i believe 150mm thick.

Thanks bud, the 150mm pir is the floor.

What do you think is a good thickness? It will be pir and at the moment its 150mm

Were not planning on MVHR? Did you mean ASHP? Or am i missing a trick with not having mhvr with a ashp

We also want ASHP so wanting be insulated well or its a waste of time with an ASHP im told

I think the house is going to be 140mm Frametherm in external walls and 150mm wool between studs? So im assuming thats 290mm altogether for walls - no osea U VALUES yet. 100mm in slab then 50mm under ufh? So 150mm in floors. 150 PIR Insulation between rafters then 20 PIR Insulation over rafters 420mm in 2 layers over flat ceiling at F/F level Any thoughts?

Can anyone help with insulation and u values? What is a good, middle of the road UValue for a new build house? In terms of walls, live in roof, flooring with UFH?

Yeah it is a rectangle, roughly 19m by 7.5m its 1.5 storey. I will wait and see the SAP calcs and then ask what the price would be to upgrade the insulation. So what is a good thickness level for roof, sloping ceiling, walls and floor? Or u value. Thanks, MIKE