20149, Ashburn, VIRGINIA
Roofing mistakes that could lead to costly consequences, from the guide on 5 simple errors.

5 Simple Roofing Mistakes that Could Have Costly Consequences

4 minute read


The roof is arguably the most important aspect of your home.  Not only is it a critical component of your home’s overall curb appeal, the roof is the first line of defense in keeping water out of and away from your home.  Simple roofing mistakes can have costly consequences to the interior and structure of your home.

Flashing Not Fastened Properly During Installation

When installed properly, flashing prevents water from seeping into your home from the rooftop.  Commonly made of metal or galvanized steel, flashing is found around roof vents, chimneys, windows, dormers and along any valleys in the roof. Properly installed flashing will have the U-shape facing toward the valley and be securely fastened along the edges. Flashing should be layered under the shingles, rather than on top of them, to prevent water seepage and consequent damage. According to the National Association of Certified Home Inspectors, counter-flashing installed along hard surfaces, such as stone or brick chimneys, will often be installed and fastened incorrectly. Check these areas closely for any gaps in the installation or sealant that could allow water access.

Pressure Washing the Shingles

We are very conscious of how our roof looks – we see it every time we pull in the driveway – and the itch to clean it can be strong when it appears dirty.  Bringing a pressure washer to the roof with the intention of washing away some dirt can do far more harm than good. Blasting streams of highly pressurized water at composition roof shingles will remove more than dirt.  Roof shingles are comprised of water-resistant materials including asphalt granules that protect your home from leaks. Pressure washing the roof will remove dirt and strip these granules from the shingles, leaving your home unprotected.  If you strongly feel that your roof needs a cleaning, your best course of action would be to contact a professional roofer to discuss options you may have to improve the appearance of your roof.

Improper or Inadequately Ventilated Roof 

A properly ventilated roof will allow moisture caused by temperature differences in the inside and outside air to escape from the attic areas of your home.  Improper ventilation can trap this moisture causing mold and algae growth throughout your home’s structure.  Improper ventilation can also encourage ice dams to form causing further damage in areas with snowy winters.  Proper roofing ventilation can extend the life of your roof, saving you money over the long run.

Not Planning for Ice Dams

If your home is located in a cold climate, you should plan for the formation of ice dams during the winter months. An ice dam is a layer of ice that forms along the eave line of a roof.  Generally when you see icicles hanging from the edge of a roof, there is an ice dam behind it.  Ice dams are formed when the temperature of a roof is uneven, generally warmer at the top and colder along the eaves. Snow will melt on the warmer portions of the roof and form sheets of ice at the colder edges called ice dams. These ice dams force water under the shingles, if the roof is not insulated enough.  Guard against water damage from this ice formation by making sure to regularly clean out your gutters.

Not Diverting Water from Drains Away from the Base of Your House

If you keep water out of and away from your home, you will significantly increase the life of the building.  Foundation erosion, basement flooding, and soil deterioration all occur due to improper water drainage.   According to the Environmental Protection Agency, an extended rain spout of at least five feet should be sufficient to drain water from your rooftop and eaves and away from your home. Draining water away from your home will prevent foundation erosion and resulting mold caused by constant dampness due to rain and snow melt.

Utah Roofing Repair

Your home is more than your castle; it is your single most important financial investment. Simple preventative steps today, such as checking for properly functioning flashing and water diversion, can greatly reduce the chances of water damage and costly headaches down the road.

Reviews

Linda Wiedrich AvatarLinda Wiedrich
I love my new windows.! The installers were knowledgeable , neat, cleaned up very nicely . Extremely pleasant crew that worked fast and competently with each other. I was shown that all the windows worked perfectly, and how to pull them in for cleaning. I would recommend these windows and employees. - 9/05/2026 
Helen Litle AvatarHelen Litle
Yesterday I had the pleasure of having new windows installed on my back porch and laundry room by Advanced Window Products team headed up by Junior along with Pablo and Jesus. They arrived even a bit earlier than was expected. After doing a quick walk-thru with Junior, all three got right to work despite the awful heat. They worked steadily helping each other as need by and had all four of the new windows in within two hours. After a lunch break to refresh and cool down, they returned to finish the caulking, cleaning, and prettying everything up before departing.Through out Junior kept me in the loop and Pablo and Jesus were polite. All were so polite and hard working.Shouts go out to Katie in the Tolleson office for all her help getting everything scheduled and figuring out payment options and for just going above and beyond. Thank you to all! I know I’m going to enjoy my new windows. - 8/26/2026 
Glen Sellers AvatarGlen Sellers
They did a great job replacing my basement windows. There were gaps because of settlement issues between the old windows and the window sills. They took care of all these issues. They were very professional and left everything very clean. They showed up on time. It all went well and looks great. - 8/24/2026 
Julie Rolfsen AvatarJulie Rolfsen
Advanced window products did a great job, and the showed up on time. Our new windows are wonderful! Give them a chance if you looking for windows. - 8/20/2026 
Julie Bronson AvatarJulie Bronson
Very happy with my new windows, the installers were very professional and felt my house clean and very little damage to the window seal and trim. - 8/19/2026 
derrick byrd Avatarderrick byrd
I stopped in for a rock chip repair yesterday, they scheduled me for the following day. Come to find out if had 2 rock chips. They got the chip fix beautifully and fast with amazing customer service. I will be coming here for all of my glass needs and so should you - 8/18/2026 
Emily Bangerter AvatarEmily Bangerter
We're very impressed with the prompt and professional service we've received. They were on time for appointments and install, and the workers were polite and courteous in our home. The office even called to follow up after install to make sure we were happy. Our only complaint was a few screws and small pieces of debris left in the grass, which took just a couple minutes to clean up. The windows have survived a couple storm days already with no issues. So far so good! - 8/17/2026 
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