moisture control

I ran my bathroom extractor fan up into the loft just to avoid drilling through the wall: when I lifted the insulation two winters later, it was too late

by
I ran my bathroom extractor fan up into the loft just to avoid drilling through the wall: when I lifted the insulation two...

Venting a bathroom extractor fan into the loft instead of outside seems like an easier installation, but it unleashes a hidden disaster: warm, moisture-laden air condenses on cold roof timbers, insulation, and felt, causing mold growth, thermal performance loss, and structural rot that can cost thousands to repair. Building regulations explicitly forbid this practice for good reason.

I ran a fresh bead of silicone straight over the old mouldy sealant to save time: when the black spots came back through it a few weeks later, it was too late

by
I ran a fresh bead of silicone straight over the old mouldy sealant to save time: when the black spots came back through i...

Applying fresh silicone sealant over existing mould might seem like a time-saving hack, but it’s actually sealing the problem inside rather than solving it. The mould isn’t living on the sealant surface—it’s thriving behind it, and a new layer just gives it more time to work back through. Here’s the proper way to fix it permanently.