We did some research and tests and found that the big str.
How to seal tongue and groove in attic.
1 you re usually working over your head.
Place the first sheet of flooring against the attic wall and check for square.
Most latex polyurethanes are thin and somewhat milky but will dry to a crystal clear finish.
The boards also are visible from the attic.
A paint pad cuts out bubbles and allows you to spread the polyurethane evenly and quickly so it s the recommended tool.
When we removed the old ceiling tiles we found tongue and groove boards but the years have left gaps of up to a half inch between them.
Begin laying the tongue and groove chipboard in the furthest corner from the attic access.
2 you have to seat the tongues and grooves together and they don t always want to marry.
We had wood particles and dust falling from our tongue and groove ceiling due to some widened gaps.
Installing tongue and groove walls can be a real workout.
3 tongue and groove isn t always flat so you have to force the boards together to get them seated.
How do we seal up the gaps so insulation dust and bugs don t drop into the living areas.
Tongue and groove paneling is a pleasing alternative to a wallboard ceiling particularly in a knee wall attic pine paneling is most common but any tongue and groove material can be used these materials are typically x to jf thick and are attached directly to ceiling joists and rafters over faced insulation when required most codes require.
Fwiw i just removed all the insulation r 3 to r 6 in my attic air sealed and am re insulating with rock wool batts.