How To Replace Plywood Siding


If you have damaged plywood panel siding, you commonly don't have to replace the whole wall. Plywood siding is comprised of four vertical boards made from several layers of pressed veneer with decorative grooves. 

Plywood siding stays durable for a long time, but they can still get damaged over time from the elements, especially at the vertical seams where water can seep through the wood. Follow these steps to replace plywood siding. 

Prepare to Replace the Siding

To replace the boards, gather:

  • work gloves 
  • eye goggles
  • step ladder or extension ladder
  • tape measure
  • pencil
  • 120-grit sandpaper
  • screwdriver
  • utility knife
  • two-inch wood screws
  • pry-bar or nail puller
  • water-proof  wood putty
  • circular saw caulk and caulk gun
  • replacement siding

Place a step ladder or extension ladder on sturdy ground to comfortably reach the siding, but don't put it against the siding. When you shop for replacement plywood, don't be tempted by the thinner, cheaper plywood since it will not last. Opt for the half-inch to five-eighth inch siding.

It's isn't always necessary to replace boards. To fix loose, undamaged plywood siding, tap it with a two by four block. Fix small holes or cracks in panels, and use a putty knife to fill them with wood putty, letting a little run out over the edge. Sand the area with 120-grit sandpaper.

Remove the Damaged Siding

Use the scraper or utility knife to dig the siding from the seams. If necessary, detach nails from wall, door, and window trim with a pry bar or a nail puller, and lay the pieces aside.

Remove nails from the siding in the same manner, or loosen the screws using a screwdriver. If the siding got wet, smooth the ragged caulk edges on the adjacent siding with a utility knife. 

When you remove the siding, inspect the interior for insulation or vapor barriers. Contact your building code department to find out how to update the insulation and siding so it meets code requirements.

Install the New Panel

Measure the old siding panel, and transfer the measurements to the new panel, paying attention to the grooves, since they need to run in the same direction as the installed panels.

Trim the siding to fit with the saw, keeping the power cord at a safe distance to prevent tripping.Test the fit into the opening, and mark stud locations on adjacent panels.

Spread caulking around the edges of the intact paneling, and firmly push the panel in place. Fasten the screws to the panels every eighteen inches. Repeat until all siding has been replaced, and paint the new siding to match if desired.

If you need assistance replacing your siding, contact a siding replacement contractor such as Side-Pro, Inc. to discuss your needs.