NewHomeExpert
Well-Known Member
The loft should be completely covered and all the same thickness. The only exception would be under the cold water tank if this is located in the roof space.
It sounds like some of it may have been displaced by a trade (electricians or plumber) working in the roof space and not put back.
18" (450mm) is very generous. 250mm used to be the normal required.
At the eaves, there should be special plastic ribbed sections (rafter trays as you say) that allow air to pass from the eaves into the roof space to provide cross ventilation.
Not quite sure what the soffit gap is but any gap would be giving better ventilation to the roof space which would lessen condensation not increase it.
Be aware any gaps may give access for birds, wasps or even worse- bats (you can never legally get rid of them!) etc so gaps should be addressed.
It sounds like some of it may have been displaced by a trade (electricians or plumber) working in the roof space and not put back.
18" (450mm) is very generous. 250mm used to be the normal required.
At the eaves, there should be special plastic ribbed sections (rafter trays as you say) that allow air to pass from the eaves into the roof space to provide cross ventilation.
Not quite sure what the soffit gap is but any gap would be giving better ventilation to the roof space which would lessen condensation not increase it.
Be aware any gaps may give access for birds, wasps or even worse- bats (you can never legally get rid of them!) etc so gaps should be addressed.