What insulation can i use in my rafters

Furts

Kevcunny67 wrote: »

If i dont comply with building regs and only put something smaller into rafters. I havnt any planning permision either im pretty sure i dont need it.

If you go about matters without careful attention to membranes and ventilation then it will become a certain disaster and a waste of time and effort. The risk is the Rockwool will retain moisture, thereby reducing its'insulating value and causing you issues with damp. I removed the soaking, and rotten, front of a Rockwool insulated house for just this reason.

The flip side is people use Celotex, Kingspan and the like for good reasons - even though the product purchase price is higher.

Another flip side is folks who avoid established procedures, such as Buildings Regulations, are a warning sign to professionals and ordinary householders with a sense of fair play. Much as Davesnave has said here. To avoid this scenario when converting a loft the floor strength, the access stairs, the fire safety and such like all become part of the works. Which means converting a loft on a tight budget may be a non starter for some folks.

glasgowdan

My loft was converted in the 1970's, but things like insulation were poor, so I pulled it to the rafters and insulated it with 70mm rigid board between and 50mm underneath. I wouldn't want the loft to be insulated with any woolly products. You're not talking thousands here... an extra £200 will get you a much better product and keep the room warmer/cooler as required.

Don't ignore the eaves space which will benefit from good levels of insulation. That's next on my list, the eaves run round all 4 sides of our loft room, and heat is escaping through ceilings of the rooms below into it, hot sunshine is warming the room up a bit more than it should too.