3 Reasons Why You Shouldn't Pressure Wash Your Roof

No one likes having a dull, dingy roof that makes their home look much older than it actually is. You may be tempted to hire someone to pressure wash your roof or, better still, do the job yourself. Unfortunately, using high-pressure tools to clean your roof could do more harm than good.

The following offers three reasons why it's a bad idea to use pressure washing equipment to clean your roof.

Pressure Washing Damages Asphalt Shingles

Using a pressure washer to clean your asphalt roof can hurt it in a couple of ways. For starters, pressure washing increases the likelihood of your shingles being lifted and dislodged by the pressure stream. On an asphalt roof using self-sealing strips or restraining tabs, the sheer force of the water can break these seals, allowing your shingles to come loose and eventually blow off during the next storm.

Pressure washing also washes away the granules covering your asphalt shingles. The granules serve as protection against harsh UV rays that can degrade your shingles over time. The more shingles you lose during the pressure washing process, the more vulnerable your roof becomes to premature wear and tear.

High-Pressure Cleaning Causes Water Intrusion

Although your roof is designed to keep water out of your home, there's a huge difference between the occasional strong downpour and the deliberately strong jets produced by pressure washing equipment. Simply put, your roof was never meant to withstand the rigors of pressure washing.

Pressure washing forces water past the protective shingles, allowing moisture to seep through the underlayment. Once this happens, moisture can infiltrate the basic roof structure and leave behind severe water damage in critical support structures. Pressure washing can also cause water to seep into your home's ceiling, attic and walls, leading to dangerous mold and mildew buildup as well as structural damage to your home.

Pressure Washing Actually Spreads Moss and Fungi

Many homeowners assume that pressure washing effectively removes moss and algae buildup. But instead of actually removing moss and algae, pressure washing can spread spores over a much wider area and embed them further into the roof structure. After pressure washing, it's only a matter of time before your algae problem comes back on a much larger scale.

Fortunately, there are plenty of safer and less intrusive options for cleaning your roof. Your roofing contractor can help you explore these options and choose one that best addresses your roofing issues. Check out resources like https://www.ratliffenterpriseskc.com for more information.


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