Loft conversion when house built in 1982.

[marlb]

Hi,

I have attempted to get the info i need from other threads but I cannot seem to find what I need.

Can someone help? The loft in my house was converted when the house was built in 1982. We have lived here for 3 years! I want to start using the loft space as a bedroom for my eldest but I have noticed that the insulation behind the plaster board is only 50 mm Cellotex. I have read that it should be nearer 150 mm. The rafters are 100 mm deep and so there is a 50 mm air gap and then the insulation. I want it to be warm in winter and cool in summer. Can anyone tell me what the spec should be? I am prepared to rip all the plaster board out and start from scratch.

Is this enough detail?

 

[tony1851]

That thickness of board would not comply with current insulation standards.
Nowadays, you are looking at a minimum of 125 thick insulation board. Usually this entails some between the rafters and some across the underneath, and then the plasterboard.
But why bother? You willl cause a lot of mess, and considerably reduce your headroom and hence useable space.

 

[marlb]

Am I not required to comply with current regs?

 

[freddiemercurystwin]

Am I not required to comply with current regs?

No of course not.

You can upgrade it if you want to be there is no requirement to do so.

 

[marlb]

Thanks for the advice. I have plenty of room so I think I will add the extra just to keep the bills down.