Noob here. I bought a replacement extractor fan which is slightly smaller than the previous one. Frustratingly the plasterboard is slightly curved too, which means there is an unsightly gap. Can I use caulk for this? Or silicone sealant? I read something scary about these two things not being up to “fire regulations”... Thanks!https://ift.tt/2PQlQIf via /r/DIY https://ift.tt/2Pm8nsk
