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Insulate between rafters of shallow inhabitable loft or on top of joists?
Anonymous user 03/03/2024 - 3.42 PM
Context: We are renovating a first (top) floor flat which has a shallow (17.5 degree) pitched tiled roof, so the loft space in inhabitable. All ceilings of the flat will be removed entirely and replaced with new and with spotlights in every room. Radiator piping will also be run through the loft space as there is concrete under the floor of the flat. Question: Should we insulate the floor of loft with rockwool or the rafters of the loft with Celotex or...? And what thickness?
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3 Answers
DandS_Insulations
Rating: 5 out of 5
I would install 300mm of Loft insulation installed from below With netting hold it in place, before you then board out the ceiling.
Answered26 April 2022
8
ADR Property Maintenance
Rating: 5 out of 5
make sure you have air flow into the loft void above the insulation to prevent a build up of condensation
Answered26 April 2022
2
Anonymous user
If the ceilings are removed you can apply breathable spray foam insulation which lasts a life time , the problem with floor rolled insulation is it degrades and only last 4-5 years . I imagine you don’t want to be constantly taking the ceilings down . Protec insulation Bodmin
Answered13 May 2022
0