If you have painted hardboard siding on your house, you may have noticed certain areas where the paint is peeling off. This failure of the paint is commonly caused by moisture getting underneath the paint. It also can be caused by inadequate surface preparation before the siding was originally painted.
Whatever the cause of the peeling, in order for you to "fix" the problem, you will need to repaint the entire house. To do this, you will first need to remove the peeling paint. You can do this in a variety of ways: you can either sand it, scrape it, or pressure wash it off of your house. Here is a tip that you will need to know, though: whatever means you use, you will need to be careful not to gouge, or otherwise damage the hardboard siding.
After the loose paint is completely removed - if you used anything other than a pressure washer to do it with- you will need to clean off any dirt, or other surface contaminants from the exterior of your house. You can do this with a pressure washer, or, with just a garden hose, a suitable cleaning product, and a screw - on scrub brush. Here's another tip: To ensure that the paint will adhere to the hardboard siding properly, you must rinse the exterior walls thoroughly. Any residue can / will prohibit the paint and primer from forming a strong bond with the surface.
The next step is to allow the siding to dry thoroughly. You will then need to prime it with a good - quality primer that is suitable for hardboard. Here's a tip: acrylic latex is always a good choice to use for the primer, as well as for the topcoats of paint. Follow the manufacturer's directions on the container in order to achieve the best results, but two coats offer the best protection. You can use a paintbrush to apply the primer to the hardboard siding, but using a paint spray gun would save you lots of time.
You will need to allow the primed hardboard siding on your house to dry thoroughly before you move on to the next step. However, here is another valuable tip for you: never leave the primed walls unpainted. The primer is a protectant and sealer, but it cannot take the place of a durable topcoat of paint. And, if you wait too long - in terms of weeks or months - before you apply the first topcoat of paint, you will probably create even more work for yourself. You may have to repeat the step of cleaning any dirt or other surface contaminants off of the primer coat.
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