- Before you select your soap, you should make sure that you have the right power washer for the job. For a job such as cleaning your siding, you shouldn't need more than 1300 to 1600 psi. If you have wood siding, reduce this to around 800 to 1000 psi. There are both electric and gas-powered washers. These are described in further detail later, but either will be appropriate for this job. Power washers can be used on metal, vinyl and wood siding, but should not be used on stucco or hardboard.
- When selecting a cleaner, you should read the label carefully. Most will say that they cut through dirt and grime, but if you have a noticeable problem with mold and mildew, you will want a formula that mentions this specifically. As consumers become more eco-friendly, you can also find an increasing amount of information on the environmental benefits of the product. Manufacturers such as Simple Green provide power washer siding cleaner that is biodegradable and non-toxic to pets, plants, and children. If you do not use a non-toxic cleaner, remember to cover any plants around the base of the house that are in danger of soaking up the cleaner.
- When you're ready to clean your siding, the first step is to soap it up using a low-pressure setting on your power washer. As you are applying your soap, work from the bottom up. Then rinse from the top down. Avoid doors and windows and spray at a downward angle. If you have some difficult mold or mildew spots, you may need to wash these by hand with a bleach solution. Avoid blasting a stubborn stain for an excessive amount of time. Some homeowners regularly add bleach to their power washer detergent. This can be very dangerous, as this much bleach can damage your grass and other plants as it seeps into the ground water. Spot cleaning by hand is a safer method.
- There are two types of power washers: electric and gas. If you are using an electric power washer, you will probably be dealing with an internal reservoir. If you have a gas power washer, you may simply need to place a siphon into the cleaner. Always check the instructions for both the power washer and the cleaning solution to make sure that you have a compatible match. Most cleaning solutions come in liquid form. However, some cleaners are available in handy plastic soap packs. These packets are convenient when using an electric model that will allow you to simply drop them into the detergent tank. If you are using a gas model, you will need a large bucket to dissolve the packets in before adding the siphon.
- Cleaning your siding with a pressure washer is so much easier than doing it by hand that you may feel like this job is a breeze. However, it's extremely important not to throw caution to the wind. At close range, a pressure washer can tear off flesh. If you have pets or children, the best safety method is to keep everyone inside while you're working. You should also be cautious of shock hazards such as electrical lines feeding your meter. Lastly, keep a good distance between the power washer and siding. A power washer at close range will strip the finish from your siding.
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