Replacing Wood and Engineered Siding
Wood and Engineered sidings are good choices for siding that last a long
time but do not tolerate water penetration very well. This usually becomes
evident where the siding meets horizontal surfaces such as porches, steps
and decks. Fortunately, it is fairly easy to replace. The biggest problem
can be finding a replacement piece. The siding in this how-to is a smooth
engineered siding and is very easy to replace as it has no texture.
Items you will need:
- Circular saw
- Exterior Primer
- Exterior Paint
- Pry bar
- Galvanized Nails
Determine the area that has to be removed to effect the repair. Engineered
siding will swell up and fall apart and wood sidings will deteriorate,
split or rot (Fig. 1). Locate the nearest wall studs and mark the pieces
of siding to be removed along the middle of these studs. One method for
locating the studs is to find the nails that hold the siding to the house.
Remember that studs are usually installed 16" on center.
Use a utility knife to score the paint where the rows of siding overlap
(Fig. 2) as it will ease removal of the boards. This is especially important
for engineered siding. Also, cut away any caulk that may be in the area
If the piece of siding you want to remove is a whole piece then skip
to Step 4. Otherwise, set the depth of cut on your circular saw to the
same thickness as your siding. Cut along the lines you marked earlier.
Your cuts will need to run into the course above the damaged course as
the siding boards overlap some. If you are removing more than one course,
you should stagger your cuts if possible.
Using a pry bar, loosen the course of siding above the repair area (Fig.
4). Place a shim in between the courses to keep the siding away from the
repair area. Using a reciprocating saw or (preferably) a hack saw blade,
cut the nails in the above course that hold the damaged course.
Slide out the damaged course (Fig. 5). Use a pry bar to remove the damaged
siding if necessary (Fig. 6). If there are stubborn pieces, a chisel will
take care of it.
Inspect and repair any material behind the damaged siding (Fig. 7). This
might include sheathing, felt or a house-wrapping product.
Using the old siding as a pattern, cut the new siding to the proper dimensions.
The new pieces should be about 1/16" shorter than the original to
allow for expansion.
Prime the siding before you put it back on the house (Fig. 8). Make sure
that you use a good-quality exterior primer.
Slide the new siding back into place. If you have a tough time sliding
the siding under, place a beater block against the bottom edge and drive
it home (Fig. 9). Using galvanized nails, secure the patch in place. Make
sure that you nail into the studs. If you are replacing more than one
course, start at the bottom.
Seal up any gaps or nail heads with a paintable exterior caulk. After
the caulk cures, paint the repair area with exterior paint that is compatible
with the primer you used.