Gap between flat dormer roof and fascia

Remove the roof fascia temporarily, enforcing and fix new supporting structural timber, then fix existing fascia back.

A 20–30mm gap that is getting bigger after a loft conversion isn't normal and should be checked. It could be due to roof movement or inadequate support to the fascia. I would contact the contractor who carried out the work and ask them to inspect it. The correct repair depends on the cause, so don't just fill the gap until it's been properly assessed.

Hi, A 2–3 cm gap where you can see the roof timbers isn’t something I’d ignore. It could simply be poorly fitted fascia or soffit, but it could also indicate that the roof edge hasn’t been finished or supported correctly. Without seeing it in person, it’s impossible to say exactly what the cause is. I’d recommend: * Taking clear photos from several angles. * Asking the builder to inspect it and explain why the gap is there. * If you’re not satisfied with their response, get an independent roofing or loft conversion specialist to inspect it before any remedial work is carried out. If the gap allows water, birds or insects to get in, or exposes untreated timber to the weather, it should be rectified as soon as possible. Don’t let anyone tell you it’s “normal” without a proper inspection. A well-finished loft conversion should have neat, weatherproof roof edges with no unnecessary exposed structural timber. I hope you get it resolved quickly.

A 2–3 cm gap where the roof timbers are visible should be inspected, as it may allow water, birds or insects to get in. It does not necessarily mean the whole loft conversion is badly built, but the fascia, soffit or roof edge may not have been finished correctly. I would contact the contractor first and ask them to inspect and rectify it. If you are not confident in their explanation, arrange an independent roofer or surveyor to check the area before any repair is carried out.