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FAQ

What are the roof insulation materials?

What are the roof insulation materials?

I have 4 pieces (about 50 sq ft) of odd shaped polystyrene foam insulation between 3" and 4" thick. it's leftover from installing a flat roof. creative ideas anyone?

I'm a bit confused here Andy. If the flat roof needs replacing, when it is removed what is revealed is going to be exactly what you would see if you removed the ceilings. So why consider removing the ceilings if they are ok? When the flat roof is replaced put the insulation in then. Whilst rockwool would have been the material to use there is now roofing insulation board that is much more efficient, 50mm board gives equivalent insulation of something like 150mm rockwool. If the flatroof isn't fitted with suitable vents to keep it ventilated fit them when the roof is done too. The only reason I can see for replacing the ceiling plasterboard is if it hasn't got a vapor barrier ie foil backed board.

i mean, what do you use to make it stay put? glue? nails?

These are sheets of foam cut to size, they use a piece or steel wire to hold the foam up its cut some what longer then the width of the bal so it bends forcing it to dig into the joist.

What is the aim of insulation in walls and in roofs?

The basic idea on insulation is to slow the movement of heat.

this room has an aluminum roof and hardwood siding. All the heat hit the aluminum roof

spray foam

the best way to thermal insulate and water proofing of rcc slabs economical, may be some poly urethane material or whatever but should be very effective and light weight.

use a polythene sheet . i dont know about where u live but where i live we get very long and broad size thick polythene sheets to make shelter or the protect from rain . even poor ppl use it to make slums . they attach a sheet in bamboo and they bury half of that bamboo stick inside the ground and by arranging 4 of them like this in a square area they make a bamboo frame. then as i said they attach sheet and make temporary home but they live there for years.

House is a bi-level. Recently added storm windows to deck off dining room. Having a new rubber roof installed would like to know if we can insulate ceiling to make the room warmer. What product do you suggest we use. we are getting conflicting answers, some say you can insulate others say the ceiling needs to breath having a rubber roof install. Please advise.

Yes, you can. There is a little plastic piece that you will want to tack to the underside of the roof though before you install your insulation. It is a plastic air vent that keeps about an inch or so of space between the roof and the insulation so that air can move through. You need to do that so the roof can breathe as they say. If you don't allow it to breathe, the difference in temperature from outside to inside will cause the roof to sweat and will make your roof go bad a lot quicker.

I have a split house with an attic where I have insulation on attic floor, but the house seems to be cold still, Can I add insulation to the roof of the attic? If so, any options? Thank you.

No, you want the air to circulate from the soffit vent to the ridge vent or gable vents, whichever you may have. This will prevent mold and condensation.