Painting exterior masonry walls can be a tedious job to do. With some knowledge of products to use and tips on how to apply them should greatly decrease your stress level if you must tackle painting them.
Paint Products for Masonry Walls.
Paint products used, following the application of block filler includes latex and acrylics. Even solvent based paint products may be applied to block fillers. To further increase performance of block fillers different types of epoxies may be added directly into the block filler. Times that the need for hardening agents, such as epoxy is needed, is when the masonry structure to be sealed is exposed to continual and copious amounts of moisture.
Application Methods of Paint to Masonry Walls
Using an airless paint sprayer is an acceptable method of applying paint to masonry walls. If block filler has been applied prior to spraying the walls, just simply applying two good coats of paint will provide sufficient coverage. If a block filler has not been applied to the masonry walls then, throughout spraying the paint onto the surface, it must be brushed in, not to wait until the paint has dried. You must brush it into the surface while the paint is at its wettest so it will seep as deeply as possible into the pores of the masonry work. Coverage of paint to masonry surfaces not containing block filler is a much slower process of application. Many times it require several coats of paint to adequately cover its surface. Using a paint roller to apply paint to raw masonry surfaces usually has greater success in coverage using fewer coats to do it in. As indicated above, brushing paint on a masonry wall has a level of difficulty when trying to cut in because you need to load your paintbrush extremely full of paint in order for it to seep into its pores. This can be a messy venture. Nevertheless, it is still a way of applying paint to your exterior masonry walls.
Cleaning up block filler is done best with warm soapy water, but just water alone will work. You can use water to clean up latex and acrylic paint also. To clean up alkyd paint products (also known as oil based products) solvent clean up is necessary. Using mineral spirits or lacquer thinner is necessary for the clean up of any alkyd or oil based product.
Painting exterior masonry walls is much easier if a block filler has been applied prior to painting. Although it is not necessary, but it is advisable. Aside from making the surface easier to paint still is not the most important factor of using block filler. The main purpose of using block filler is to create a moisture barrier for your masonry structures. When painting masonry surfaces, applying block filler is a very important step and should always be included in the process.