How worried should I be that this crack has appeared and it appears to flex a couple of mm when I stand on the stair next to it? Probably slightly wider than a £1 coin at the wide end. Stair 2 and 3 are now really squeaky, none of the rest above then are.
On a more serious note, it's pretty normal. You can try using a flexible filler like Toupret Fill-Flex. I've done that with a very fine scrim on staircases, really time consuming process but it's worked well enough.
My loft stairs are loud as fuck. As are my main stairs, to be honest. I've asked most of the trades who've been in if it's an issue. None have been overly bothered.
How worried should I be that this crack has appeared and it appears to flex a couple of mm when I stand on the stair next to it? Probably slightly wider than a £1 coin at the wide end. Stair 2 and 3 are now really squeaky, none of the rest above then are.
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