What should be checked before fitting mineral wool between roof rafters?
Check the roof covering for leaks, inspect the timber and existing insulation, and confirm how the roof space is ventilated. The available depth and construction affect the appropriate build-up; filling a gap without considering moisture movement can create problems. A visual check alone cannot establish the right specification, so assess the complete roof assembly before installation. Loft insulation is another option to consider where the floor is the relevant boundary.
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