How To Seal Plywood In Attic

Step 5 use a caulking gun to apply caulk to seal any holes that appear in the roof.

How to seal plywood in attic.

To make it easy to eyeball how level the material is as you blow it in screw depth guides to joists throughout the space. Heated rooms built into attics often have open cavities in the floor framing under the walls. If the seam of the insulation and the plywood line up it could create a weak area through. If your attic joists won t bear the weight necessary to finish out a living space but the engineer cleared them to support floor decking for light storage you can install inch plywood or.

Let the wet areas dry and then apply the patch to the underside of the roof with a putty knife. Plug all open joist spaces under insulated side walls. Drop the attic door over the weather stripping and mark around the perimeter of the attic door with a marker. Cut a piece of plywood to the size of your attic door.

Make sure the fill s depth is uniform across the attic. Cut a few pieces of foam board insulation the same size and screw them to the plywood with long 4 screws. Install a piece of weather stripping around the access hole in the attic. The key to a smooth finish is to apply the coat evenly.

Use enough of the roof patch to liberally cover the leaky area. Press the insulation sheet against the plywood. Lay the insulation so that it overlaps a plywood seam. Allow the sanding sealer to dry as per the manufacturer s instructions.

Remove excess moisture in some cases as with a roof leak issue you may have standing water to contend with in your attic. Painting is one of the most common methods of sealing plywood and one of the most cost effective. Polyurethane or latex bases paints provides a layer of protection that seals the porous surface. Seal off the area by taping down plastic sheeting in all the exposed areas of the attic.

This sheeting will create a barrier that keeps mold spores from getting out of your work area and into other parts of your home. Fasten blocking around the hatch or door to allow the material to be installed around this area without escaping. But just as importantly it can decorate the plywood if the exterior is going to be seen. Long piece from a batt of fiberglass insulation and place it at the bottom of a 13 gallon plastic garbage bag.

Do not saturate the surface.