How to Clean Mildew Off Vinyl Siding

What You'll Need
Pressure Washer
Mildew Remover

After several years of sitting in the weather, you may find some mildew buildup on vinyl siding that is wrapping your house. This mildew usually starts on the underside of the vinyl siding near the bottom of the house and can work its way onto the surface area of the vinyl. If not taken care of quickly, the siding can be pitted and even cracked.

Step 1: Rinse Dirt Off

The first step to remove the mildew from your vinyl siding is to rinse it off. You can use a power washer connected to a hose for removing dirt, cobwebs, and grime that has set into the siding for the last few years. Once this is removed you will be able to better see where the mildew is and how bad it has gotten.

Step 2: Mix Cleaning Solution

You can use an over the counter mildew remover and spray it on your siding. However, for severe mildew on the vinyl siding you may want to use a solution of bleach. Using a pail, mix one part bleach with three parts of water. Be careful not to splash the bleach onto your skin or clothing.

Step 3: Clean Mildew

Spray the solution onto the siding and scrub it with a sponge. Work the solution into the vinyl and let the bleach solution sit for a few minutes.

Step 4: Rinse and Check

After a few minutes, use the pressure washer again to rinse off the cleaning solution. If there is still mildew on the siding, repet the process until clean.