Home Improvement Asked by wyc73 on December 17, 2020
I will be laying 18mm OSB/3 boards on 2 x 4 joists for a garden shed. I was planning to screw and nail them down using a mix of 50mm decking screws and galvanised nails. However, quite a few sites/videos recommend gluing the boards down too using a grab adhesive. However the choice is overwhelming.
What key label/ingredient should I look for when purchasing? I am in the UK so main consideration is atmospheric damp( the frame will be on blocks with airflow beneath the frame ). Being a shed( for storage only ), would it be problematic to skip the glue altogether?
The boards are not tongue and groove. I have read I should leave a gap between the boards for expansion and contract. Is there a recommended gap?
Adhesive is used for sub-floors in homes to help eliminate squeaking from flex/movement.
Since this is a garden shed i do not know that is necessary. Just use lots of deck screws. If you want to there are several that would be sufficient. Here is link to a page that tested several, You can choose.
I think using 2x4 as floor joists is not a good idea, I do not know what size your shed is or how much storage weight it will hold so i cannot advise on joist size.
Correct answer by Alaska Man on December 17, 2020
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