To get basic measurements, measure the length and width of each wall you want to paint in inches. Multiply the length and height together, and divide by 144. This will give you the square footage for each wall. A gallon of paint typically covers around 400 square feet. In some cases, you may need a primer 2 first, then a single coat of paint, meaning that you may need one gallon of primer and one gallon of paint to cover 400 square feet. However, if the wall requires multiple coats, this will increase the total amount of square footage required, and therefore the amount of paint.
Climate is another factor to consider. Sunlight, wind, rain and salty weather can all wear out exterior paint. Oil-based paint is durable against wind, rain and temperature changes, but sunlight tends to degrade it. Alkyd paint chalks and sheds very thin layers when it begins to wear. Latex paint is the more durable option for very sun-drenched and relatively dry climate areas. Latex paint with high vinyl content should be avoided, however. Acrylic resin is by far the more durable binder for outdoor latex paint.
When you’re ready to tackle your next paint project, we offer an amazing choice of colors from top paint brands, at the best price, and expert know-how to help you do the job right. Whether you’re making a colorful update to the interior or exterior of your home or working on a unique DIY project, you can really pour on the creativity with our unmatched selection of paints and exterior stains, craft supplies like chalkboard paint, stencils, glitter, or even glow in the dark spray paint. You should also check out our paint project and buying guides as well as The Home Depot Blog for current paint trends, popular color palettes and paint craft ideas. For all your painting needs, small and large, we’ve got you covered at The Home Depot.
When it comes to painting your house interiors, you need professional results. Whether it’s a full remodel of the house or a new accent wall, your home deserves a high-quality service and an impeccable finish. Our CertaPro Painters® interior house painting services provide a seamless, efficient, and meticulous interior painting job that will make a world of difference to your home’s overall look and impact.
A number of factors help determine when you should paint your home’s exterior. These include your local climate and weather conditions, the age of your home, and the type of siding used. A high-quality finish in ideal conditions could last 10 years. But if your home takes a beating from the elements, you may need to repaint as often as every three years. Most homes can be on a 5-8 year interval. If you’re not sure if your house is due for a refresher, watch out for signs of deteriorating paint, such as fading and chipping.

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