July 18, 2021
I am transforming the attic floor into a drain-pan to catch and hold any water that might leak from the HVAC equipment, or even the roof.
First I used a urethane sealant on the joints and painted the wood baseboard that caps the wall cavities.
Then I painted the entire floor with 2 coats of Redguard, a waterproof membrane that is used under tile shower pans.
Then I protected the membrane with peel-and-stick vinyl plank flooring.
Finally I finished it up by glueing on vinyl baseboard.