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Can you go any smaller than 6mm? A mouse can fit through a 6 or 7mm hole, so that will stop rats but not mice.
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You’ve done some good work there but proceed with caution.
If you’re insulating that you need a good gap between the top of the insulation and the osb, with good ventilation. Otherwise you will get moisture building up in there, more than you might imagine.
If you have the space above that roof, put the insulation on top of it rather than within it.
Fox
Dugtheslug
@HatBeard
am going to measure the depth of my joists to the top of the battens and order PIR board to fit.
to stop the rodents returning and making it home again I've ordered some 6mm wire mesh and will staple it up as a barrier at the end of each joist run to block access to the insulation cavity between joists. coupled with closing up the possible entry points I can see along the outside edges with steel wool and foam hopefully it'll be enough to discourage their presence again.
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