best way to insulate

[7777777]

i need to insulate my vaulted ceiling for building regs ,, the plans say 5 inch of insulation in rafters and 1 inch over top,, fitting in the 5 inch between the rafters is easy but,,,, what i need to know is what the best or easy way to cover it all ,,,,,,IE 1 inch of insulation and then foiled plaster board or the insulation fixed to the plaster board just seems difficult to screw to the rafters and noggins ??? any advice

 

[jeds]

That's a standard specification and shouldn't be that difficult to fix. In fact it's normal to specify 40 or 50mm. Just use long fixings.

 

[7777777]

thanks john but what would be the best 1 inch insulation over laid and then ordanary plaster board,,,, or plaster board with the insulation attached to it

 

[jeds]

Go for the cheapest. Prolly insulation and then board. Don't bother with foil back.