How to Fix the Soffit and Fascia on a House
Fix the soffit and fascia with an overlay.
Fix Holes in Your Wooden Soffit
Repair a Wood Soffit
Fix a Roof Fascia
Installing Vinyl Fascia Trim
Two problems occur on aging eaves: The fascia warps slightly, and that leads to plywood under the soffit sagging or separating. It's an ugly situation. There seems to be no alternative to replacing everything -- but you don't have to. Make it all look new again with an overlay technique that forces fascia back where it belongs while providing a lip to attach plywood to the soffit. Fix the problem in one afternoon with a few ordinary tools and supplies.
Measure the width of the fascia and add 1 inch. The extra inch is to provide a lip at the bottom for the installation of the soffit plywood. Set a table saw to this measurement. Rip enough 3/4-by-6-by-120-inch poplar to span the length of the fascia.
Place one of the pieces of poplar flat against the fascia, flush on one end. Force the top of the poplar up tight against the overhanging shingles flashing or roof decking. Shoot 2-inch finish nails randomly along the length to hold the poplar in place.
Drive a series of 2-inch screws through the poplar, pulling it tight against the fascia to remove warps. Using a drill/driver, drive in one row of screws 2 inches from the top and one row 2 inches from the bottom edge. Examine the bottom edge. If you see spaces between the fascia and the poplar, drive additional screws where needed to close them.
Place the next piece of poplar on the fascia, butted against the first piece and repeat steps 2 and 3. Continue on until you come to the end of the soffit. Cut the last piece flush with the other end, and install it.
Measure the width of the plywood underneath the soffit. Set a table saw to the measurement, and rip enough pieces of 3/8-by-48-by-96-inch CDX fir plywood to span the length of the soffit.
Measure from the end of the soffit to the first piece of trim perpendicular to the length, where two pieces butt together. Cut the plywood to the measurement using a circular saw. It will likely be 96 inches and you will not need to trim it.
Apply construction adhesive to the back of the plywood. Place it directly over the plywood, starting on one end. Shoot 1-inch staples randomly through the plywood to secure it to the plywood on the existing soffit. Repeat measuring, cutting and placing the plywood soffit overlay until you come to the end.
Measure and cut enough 3/4-by-3/4-by-120-inch poplar, using a miter saw, to span the length of the soffit twice.
Place the first piece of 3/4-inch poplar under the soffit plywood, tight in the corner formed by the overhanging lip of the fascia. Shoot 1 1/2-inch staples through the 3/4-inch poplar to secure it to the lip on the fascia. Repeat measuring, cutting and installing the 3/4-inch poplar, butting it together, until you come to the end.
Place a piece of 3/4-by-3/4-by-120-inch poplar in the corner on the opposite side of the plywood, flush with the end. Repeat Step 9, installing the poplar on the exterior side of the house.
Fill all the holes using exterior caulk. Paint everything with exterior paint.