How To Fill In An Air Vent Hole

You will want to press it down a bit and then fluff it out.

How to fill in an air vent hole. Use some of the cut removed bricks and some mortar to fill the hole inside in the breeze. I considered either sand and cement. I think the box is too big for the kind of spray foam one would use around pipe holes.

The vents should be removable by unscrewing and if the sleeving is cemented in will need to be knocked out. Measure the height of the opening and cut two pieces from the 2-by-4 to fit the opening. This is to provide a watertight seal to the grill.

Then just fit a piece of sub floor in the opening and screw it onto the 2x4s. When its gone off remove hardboard and render the inside of the grill. These holes are intentionally left to prevent moisture damage.

This will overlap each edge one time. Stuff the cavity with your favourite insulation material glass fibre foam etc. Cover The Inside Hole Step 1 Build a frame around the opening with 2-by-4 foot boards cut to fit the dimensions of the hole.

Find blanket insulation on Amazon. I then cover the outside with some sort of aluminum plate or plywood. Weep holes are also called weep slots or weep gaps.

Any experts out there have input as to choice of insulation or external covering. The insulation should fill the hole without protruding from either side. Cut out or chisel out the cut bricks outside and replace with full bricks.