The most common mistake made in painting the exterior of a house is to use the wrong paint. If the existing paint on the house is oil-based, you must use oil-based paint to repaint the structure. If the paint is water-based, you need to use the same. To find out which base the existing paint is, all you have to do is wet a rag with methylated spirit and rub the surface. If it’s water-based, some of the paint will rub off onto the rag and if it is oil based the area rubbed will get a little sticky.
Another common mistake is to paint over a dirty surface. If possible, use a power washer on the surfaces to be painted. If you don’t own a power washer and cannot rent one, at the very least, the structure should be hosed down with a garden hose and scrubbed with a car cleaning brush. Allow one or two days for the walls to dry completely before priming or caulking.
Once you have determined the type of paint and cleaned it, you are ready to start the paint preparation. One of the biggest mistakes you can make is not spending enough time on preparation. It is about 80 percent of a good house painting job.
Use a scraper to remove any loose or peeling paint, and sand the area with 120 or 180 grit sandpaper. Prime the bare areas as you scrape and sand them since it’s a bad mistake to leave the sanded areas covered with dust. Carry a dry paint brush to use as a dust brush, and wipe the area with a rag.
Never paint from a full can of paint and rest the brush on the side. This is a simple but serious error. The brush will dry out and also drip paint down the side of the paint can. Always keep the brush in half a can of paint.
Finally, do not try to save time by applying only one coat of paint. Exteriors need two coats of paint. And don’t paint in direct sunlight because the paint will dry too fast, making it impossible to work with.
Photo 2 from freepik.com