What is the minimum screw length to use for battens? I am going to install 28x70 battens in a 13 sqm room. I have hundreds of screws at home that are 4.5x40, but are they too short?
 
My 2x the thing to be attached is the rule of thumb. So in your case at least my 55mm I would say. Preferably 70.
 
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Vi vill skicka notiser för ämnen du bevakar och händelser som berör dig.