Clean siding will stay in good repair, which will extend its life much longer. Here’s how to do it!
A lot of homeowners skip this step and prefer to work on a more exciting home improvement, but it is important to clean your home’s siding. Clean siding will stay in good repair, which will extend its life much longer. Fortunately, you don’t need any special skills to keep your siding in great shape. You won’t even need to do it yourself.
Power washing a home may look simple enough but it can be tricky. In fact, if done incorrectly it can strip paint, gouge wood or cause other unforeseen damage. There are plenty of skilled power-washing contractors out there who will happy do it for you. With a bit of preventative maintenance, your home’s siding could remain trouble from for 50 years or more.
First – Inspect your siding for damage
All siding: Whichever siding material you have on your home, it will be vulnerable to water infiltration, particularly where the siding butts up against windows, door frames and corner moldings. Inspect the outside of your home for cracked caulk that is pulling away from adjacent surfaces and reapply a color-matched exterior caulk during a dry day when the temperature exceeds 65 degrees.
Wood siding: Check for chipped or peeling paint, and cracked boards and trim.
Stucco: Be on the lookout for cracks and chips.
Brick: Look for crumbling mortar joints.
You’ll want to repair any defects before cleaning. The sooner you make repairs, the better you protect your house from moisture infiltration that can lead to dry rot and mold forming inside your walls.
See below section, Repairing Wood, Vinyl, and Fiber-Cement Siding, for instructions on repair.
What is involved in cleaning your siding?
Cleaning your home’s siding removes the dirt and mildew that accumulates in the grooves and spaces between shingles. Not only will it protect your investment, a clean house has incredible curb appeal. Some real estate appraisers believe that curb appeal adds between 5 and 10 percent to the value of a home.
How to clean all types of siding
No matter what type of siding you have on your home, it will benefit from annual cleaning to remove grime, grid and mildew. The best time to do this is usually early spring, just after the weather turns warmer. If you choose to do it yourself, cleaning an average-sized home could take two people the better part of a weekend.
Here is the best way to do it:
- Start with a bucket of warm, soapy water. Mix 1/2 cup tri-sodium phosphate (TSP, available at grocery stores, hardware stores, and home improvement centers) with 1 gallon of water.
- Divide your siding into 10-foot sections. Scrub each section using a soft-bristled brush attached to a long handle. Work from bottom to top to avoid streaking and rinse often. (For two-story homes, you’ll be using a ladder, so keep safety foremost.)
If you don’t have the time — or the inclination — you can have your house professionally cleaned for $500-$800. A professional team like Dependable Construction will use a power washer and take less than a day.
You can also rent a power washer to do the job yourself for about $75/day, but beware if you don’t have experience with the tool. Power washers can strip paint, gouge softwoods, loosen caulk, and eat through mortar. Also, the tool can force water under horizontal lap joints, resulting in moisture accumulating behind the siding.
A siding professional has the expertise to prevent water penetration at joints, seams around windows and doors, and electrical fixtures.
Repairing Wood, Vinyl, and Fiber-Cement Siding
Repairs to wood, vinyl, and fiber-cement siding require the expertise to remove the damaged siding while leaving surrounding siding intact. Unless you have the skills, hire a professional carpenter or siding contractor, consider Dependable Construction.
Repairing Brick and Mortar
Crumbling and loose mortar should be removed with a cold chisel and repaired with fresh mortar — a process called re-pointing. An experienced do-it-yourself-er can re-point mortar joints between bricks, but the process is time-consuming. Depending on the size of the mortar joints (thinner joints are more difficult), a masonry professional will re-point brick siding for $5-$20/sq. ft. Efflorescence — the powdery white residue that sometimes appears on brick and stone surfaces — is the result of soluble salts in the masonry or grout being leached out by moisture, probably indicating the masonry and grout was never sealed correctly.
Remove efflorescence by scrubbing it with water and white vinegar mixed in a 50/50 solution and a stiff bristle brush. As soon as the surface is clear and dry, seal it with a quality masonry sealer to prevent further leaching.
Persistent efflorescence may indicate a moisture problem behind the masonry. Consult a professional building or masonry contractor like Dependable Construction.
Seal cracks and small holes with color-matched exterior acrylic caulk. Try pressing sand into the surface of wet caulk to match the texture of the surrounding stucco. Paint the repair to match.
To repair larger holes and cracks, you may want to call in a pro that’s familiar with stucco work. A professional charges $200-$1,000 for a repair job, depending on the size of the damage. Repainting the patch to match your siding will be up to you.
Stubborn, black spotty stains are probably mildew. Dab the area with a little diluted bleach — if the black disappears, it is mildew. Clean the area with a solution of one part bleach to four parts water. Wear eye protection and protect plants from splashes. Rinse thoroughly with clean water.
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