Why Pressure Washing a Roof is Not a Good Idea

Pressure washing a roof — is it a good or a bad idea? While a high-powered pressure washer may brighten up or clean your roof, remove moss from the tiles, and prepare your roof for sealant or coating, it can also cause extensive damage.

High Point Roofing advises homeowners not to opt for pressure washing their roofs as it can do more harm than good.

How Pressure Washing a Roof Leads to Damage

Your roof can sustain damage if the pressure output generated by the pressure washing system is improperly regulated. If an incorrect nozzle size is used, it can modify the output of water, making it harsh. Pressure washing can also damage roof penetrations, such as flashings, vents, and skylights.

High water pressure can damage roof sealants and result in water leaks. Another concerning factor in using pressure washing is water temperature. The water should not be too hot, as it can wreak havoc on your roof.

The angle of the spray and the deflection spray need to be correct as well. If they are not, then your roof can sustain severe damage. Regardless of the way you wash your roof with a high-pressure washing system, you should still not take the risk.

7 Issues Pressure Washing a Roof Creates

Roofing materials cannot endure high levels of water pressure, thus resulting in several issues. After pressure washing, you may experience the following problems:

  1. Accelerate the degradation process of roofing materials at least 3x faster than their lifespan.
  2. Cause cracks in tiles, slate, and cedar shake roofing.
  3. Completely strip away the protective granules on shingles.
  4. Cause roofing materials to deteriorate.
  5. Damage shingles by elevating them off the roof.
  6. Disintegrate the adhesive bond between shingles.
  7. Spread fungus and moss on your roofing system.

The damage that results from pressure washing can compromise the structure of your home’s roof and increase the risk of water leaking inside your home. Since pressure washing can be detrimental to your roof, are there any other methods you can use to clean and maintain your roof? Yes, there are. Read on to find out some effective ways to take care of your roof.

4 Methods to Clean Your Roof

You can use one of the following methods to remove moss, fungus, and other debris from your roof:

  1. Clean your roof with a high volume and low-pressure system called soft washing.
  2. Use a soft-bristled brush or broom for cleaning.
  3. Use a garden blower to remove dirt and debris from the roof.
  4. Apply a roof treatment that combats mildew, algae, moss, fungus, and more.

For roof repair and maintenance and solutions to clean your roof in Southern New Jersey, contact High Point Roofing by calling them at 856-347-4700. The experts at High Point Roofing are GAF certified and have years of experience in both home and commercial roofing.

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