Is Priming Exterior of House Necessary?

You’ve heard it many times, “You should be priming exterior of your wood siding of your home.  Make sure you prime before you paint.” But do you know why?  Some homeowners are confused on if they need to paint their siding or stain their home’s siding.

Priming Exterior – Reasons to Prime Your Home

Priming is one of the best ways to have good protection when painting wood. So before priming your house siding, there are two other steps that need to be taken care of prior.

  • Make sure the siding and areas to be painted are properly cleaned, scraped and sanded. You don’t want any peeling paint.
  • So now that the house is power-washed, scraped and sanded the next step is priming the raw surface.

Penetration of Primers into Wood

Primers are designed specifically to penetrate and seal surfaces that they’re going on. So naturally, on the exterior of your home, the primer is designed to penetrate and also to block out some of the natural tannins that the wood will create over the lifetime of the home. I’ve seen some painters over the years just paint over wood and I found that the paint generally doesn’t stick very well. This is because it’s not designed to penetrate the wood surface as well as a primer. So it might look good for a couple of years but when it starts to fail, it does so in a quick manner.

Purpose of Primers

Primers are designed also to help the paint application last longer. We have found over 30 years that a surface that is properly cleaned, prepared & primed with two coats of a high-quality latex paint, will last anywhere from 8 to 12 years. There are two types of primers on the market.  When not prepared, sometimes the trim can rot.

  1. First would be an oil-based primer;
  2. The second would be an acrylic based primer.

Both of these products work extremely well. Sometimes it comes down to the individual professional and what they like to work with. I want to stress that the proper preparation of your home, especially applying a house primer is the key to having a long-lasting exterior paint job.

Don’t forget, if you need an estimate on painting or staining your home’s exterior, give me a call. My team and I have been serving the Hinsdale, Oak Brook, LaGrange, Darien, Western Springs, Burr Ridge, Hawthorn Woods, Lake Bluff, and all of Chicago area for 30+ years.

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