Insulation for cavity block wall build

[aishling]

Hey,

Starting our build soon and we are going with cavity block wall and just wondering what you guys reckon is the best option is for insulation, we were thinking of either 4" board insulation or beading insulation? Any recommendations?

Thanks,

Aishling

 

[onq]

I don't think either complies with Part L now, depending on the specification.

You need to take specialist advice not just on the wall insulation, but how the house as a whole has been designed in detail to conserve fuel and energy.

The days of judging how well a house complies in the basis solely of its wall insulation are long gone.

The benefit is that if its well designed and say super-insulated it can cost very little to heat for the winter.

Make yourself familiar with the Passivhaus standard for building, measure wice and cut once.

ONQ.

[broken link removed]

All advice on AAM is remote from the situation and cannot be relied upon as a defence or support - in and of itself - should legal action be taken.
Competent legal and building professionals should be asked to advise in Real Life with rights to inspect and issue reports on the matters at hand.

 

[RKQ]

Your preliminary BER will help you answer this question. Everything is related - walls, floor, roof, airtightness etc.
Seek professional advice. (Talk to your Designer & Certifier)