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Archive for November, 2015

The Low Down on Pressure Washing

November 11, 2015

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From “Best Home in the Neighborhood” contests to thousands of articles online with titles like “Most Beautiful Homes in America” and “How to make your Home Look Appealing” the evidence is everywhere that people want to live somewhere that looks nice. Of course some aspects of maintaining a home aren’t just about appearance, but also about extending the life of your home. For example, roof cleanings. Leaving moss and debris on your roof can eventually cause leaking and deterioration. Here at Northwest Roof Maintenance we want to help you keep that from happening. One of the most common solutions people jump to for this problem is pressure washing the roof, but this isn’t always the best option, and even when it is you shouldn’t go into it blindly! Here are 8 tips and things you should know if you are thinking about getting your roof pressure washed.


1. First off, if you have a composition shingle roof – DON’T pressure wash it. The high pressure on the shingles can loosen the granules and cause unnecessary wear and tear. Instead, opt for a brush off, a gentler option for removing the moss build up.

2. In general, pressure washing won’t hurt your tile roof. In most cases, pressure washing your tile roof will be yoDirty Tileur only option to get it looking clean again. There are some exceptions, if your tile is old and/or brittle, it might not be recommended to use pressure on the roof. You can always ask a roofing professional to look at your roof and determine if a pressure washing is recommended, and if not, what your options are.

3. It’s completely fine to pressure wash in the rain. While the rain can affect some repairs and roof maintenance, it doesn’t matter whether it’s raining during your pressure wash or not. You are already putting large amounts of pressurized water on your roof, just view the rain as a little extra rinse.

4. Pressure washing isn’t as simple as it seems and for best results you should have a professional do it. From uneven strokes causing highlights on your roof, to pressure washing over the house and ending up with Zebra stripes, your best bet is to go with a professional to get the clean even look you are wanting.

5. Pressure washing is messy. While the end result may be a beautifully clean roof, the process is not so beautiful. All of the moss and dirt that’s on your roof is getting mixed with water and coming off your roof, which means it’s going to go somewhere. Our crews will put tarps down below the roof line to catch as much of the dirty water as they can, but it’s not perfect. Some mud and water will still get on anything below the roof line, such as plants, furniture, or walkways. So go into it prepared, don’t schedule to have it done the day out of town company arrives, in fact I would give yourself a few days buffer before any big events at your home.

Pressure Wash 16. Just because it’s messy doesn’t mean it’s hopeless. There are things you can do to help minimize the mess made. – Move vehicles out of the driveway and therefore out of the way of mess. – Make sure all windows are closed so the mess stays outside! – Move any potted plants or patio furniture away (really anything that can damaged by dirt and water) either under a covered area or a good distance away from the roof line.

7. If you have a skylight there is a chance that water will get into your home. Due to the high pressure and direction of the water flow, sometimes water leaks in through the seams of a skylight during a pressure washing. This does not necessarily mean that there is a problem with your skylight or that your skylight will leak when the rain comes. However, knowing that there is a possibility of water getting in during the pressure wash, we recommend laying plastic over the area beneath any skylights.

8. Communicate BEFORE the pressure wash. If you have fears or concerns get answers about them before they become a reality. Whatever your questions are, ask them. Most companies would rather alleviate fears and know expectations before doing the job than have an upset customer after the job is done.


Hopefully these are helpful as you prepare to take care of your roof! If you are interested in a professional opinion of what would be best for your roof set up a free estimate with Northwest Roof Maintenance, Inc. Give us a call at 360-910-8938 OR 503-740-4808.

Category Roof repair