I have an mx5 NC and the damp inner roof is quite common amongst the community.
Fabsil is the most respected waterproof treatment (mine is done with it and I can attest to its excellent waterproof qualities)
As for damp on the under surface of the roof it’s most commonly associated with either leaking front scuttle grommets or blocked roof drains. A damp carpet Issa sure fire indicator of one or the other. The grommets are dead easy to replace for about £5, the drains are either easy to unblock or impossible. If impossible they’re quite easy to to remove, clean and replace.
Ps, the above need checking as a damp interior can lead to lots of electrical problems
Last edited by Grumpy2; 13/01/23 09:22 PM.
