Pocster

Well ! Got a price !! ? 3.8k for 40mm + vat 3.4k for 35mm + vat ( u difference is about 0.01 ) so I think 35mm will do ! area is approx 6m x 6m my next lesser issue issue is what concrete board to put over them . Must be tougue and grove as can’t fix through the vac packs . Also be able to take whatever waterproofing method architect fancies ...

More damaged you mean ?

My avatar will out live you all and become the thing of legends !

No other solutions come to fruition! damn the price ?

Spoke to vac panel ! 40mm gives a u of 0.18 :-)))) Thry are happy with concrete board on top , waterproofing and then concrete pour . price will be around £110 a sq metre ?

Regular reinforced- can’t remember exact depth ( will check ) but can guess 100mm

I need to achieve 0.19 u

Oh but a solution!!!! architect is now on about ashfelt as the waterproofing ......

Lol the parking area would probably just about take the size of an average car ! i think total depth for this insulation is around 20mm ( which is amazing ! ) . Will contact a firm tomorrow too see ! undoubtedly £££££££ will be distressing !

Trust me no matter what solution I use we are never parking a car on it ? http://coolconversion.com/pressure/150-kPa-to-kgf/m2 hmmmmmmmmmm !! 15,000kg per square meter ??? That right.

https://www.kingspan.com/gb/en-gb/products/insulation/insulation-boards/optim-r-e-roofing-system hey @JSHarris ! Vac in pir ? kpa 150 ! I’m really hoping my architect looks into this ...

Yes ! They sound great and expensive! i am still waiting on Kingspan to call me back - must be a way to cover them safely with screed / concrete ...

Yep ascetics only. SWMBO not a fan of 'stamps' (so that's a dead solution). Could use patio pavers ; 30mm or so?; grabs back another 20mm. U value the issue really; looking into Kingspan vacuum insulation; U value incredible!

Quite possibly a steel inner frame ( yes parking is just the middle section ) who knows what’s right ? just following se and architect as best as possible . cheers

Yeah ; it’s all possible . This would need to be designed though . Se did say that the rebar needs 35mm cover to stop corrosion - so galvanised steel could be used to reduce cover . Looking at the Kingspan product does seem to take a loading of 160kpa . They must have an se themselves that would ‘design’ something that’s meets my criteria - at a cost of course !!! cheers

Maybe ! or ..... https://www.kingspan.com/gb/en-gb/products/insulation/insulation-boards/optim-r/optim-r-flooring-system kingspan super low u - looks like can have screed ontop also . Waiting a call back from Kingspan - price will be £££££

Haven’t got enough depth for 120mm just spoke to se the 75mm extra pour isn’t structural in the true sense - it’s simply to stop the insulation crushing!! hmmmmm , now what are those super expensive high compression good u value blocks called ? ( about a tenner each ! ) .... foamglass .....

So ! assuming my architect will allow me to drop compressive strength from 300kpa - need to find the thinnest and best u value pir available . Kingspan I guess .....

Right ! spoke to everyone about aerogel you can pour concrete on top - won’t compress much. But it’s u value isn’t as great as perceived ! . Roughly same u as twice the thickness of pir . I’ve read up to 6 times better - but not true ....

Architect says no way to chip board / osb I did think this seemed bad in a concrete sandwich !! unhappy with insulation on ceiling !!! its effectively a warm room structure - so must keep to that !

Sticking all the insulation underneath does help ! . I’ll call my architect - but he’s always unhappy if it hasn’t “ gone to plan “ .....

High compressive structural aerogel would solve the issue - if it existed !! ?

That’s the problem ! i haven’t got the depth to stick 120mm in . surely underneath I.e on the ceiling with MVHR condensation not an issue ??

Yes - the insulation thickness is an issue at 50mm . So there’s no problem if I ignore the insulation ; but insulate underneath - even thicker if I wish ??

Exactly !!