The floor joists in the attic are about 100mm in height, i need to put down 270mm of insulation, whats the safest way of increasing the height of the joists
the floors not boarded as yet thats the issue with joists that are only about 100mm high and insulation that needs to be 270mm, what want to do is increase the joist hight put down the insulation and then board the attic floor to use it as storage space
Follow my instruction then, put 170mm deep timbers at right angles to the existing joist and fill in the voids with insulation.
Must add, that you need to be careful when electric cables are run through thermal insulation, as this will effect the safe current capacity the cable can carry can carry, this is mostly an issue with socket circuits. Lighting circuits that are protected by 5/6 amp fuse/breaker are normally okay.
So if you do have any electric cables in the loft insulation, it could well need to be moved to a safe location or upgraded.
If you can tell me what you have, cable size, circuit type and fuse/breaker size can offer better advice.
the floors not boarded as yet thats the issue with joists that are only about 100mm high and insulation that needs to be 270mm, what want to do is increase the joist hight put down the insulation and then board the attic floor to use it as storage space
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