How to seal baseboard corners?

If the baseboard corners are separating from the floor, it means that somewhere along the line, the flooring and the baseboard were not properly attached. This usually happens because flooring nails weren’t placed correctly or because the flooring was nailed into the wall at an angle instead of flat. In any case, the baseboard will need to be replaced. It’s also possible that the baseboard has cracked underneath and isn’t adhering to the floor.

How to seal baseboard corners at butt joints?

You can seal baseboard corners with caulk or silica gel tape. Caulk is the most common product used for sealing around baseboards. When applying caulk around baseboard corners, use a small, pointed caulk gun. Don’t overfill the joint, which will create a ridge at the corner. The caulk should be applied to the wall and the baseboard and should be sealed around the entire joint. Use a putty knife to make sure you get into the corners

How to seal baseboard corners at top of wall?

The top corners of baseboard at most half-height walls are the trickiest to seal. The two sides that meet the flooring at right angles are the most challenging to waterproof, since they’re at the bottom of any cracks that might develop in the flooring over time. The same is true of the corners at the top of window casings, since they’re in the same area as the floor.

How to seal baseboard corners on side wall?

If your baseboards are along the wall, you’ll need to seal the corners on the wall side of the trim. Just as with the floor corners, use caulk around the trim cutout and press firmly into place. Use your fingertip to create a slight rounded depression where the caulk meets the wall, then fill the depression with caulk.

How to seal baseboard corners to wood wall?

Wood wall baseboard corners are sealed to the wood wall using caulk. Ordinary silicone caulk is all that is needed to seal the corners. You may be able to use caulk that matches your wall color but it is not absolutely necessary. If you are using a color other than wood, you should be able to find a color match to blend with the wood. Look at the color of your wood baseboard and the color of your wall and find a caulk color that matches it.