What is the most common defect in a flat roof?

• <div><p>The most common defect in a flat roof is leaking. Flat roofs have minimal slope, so water pools more readily on a <a href="https://www.angi.com/articles/flat-roof-better-sloped-roof.htm">flat roof than on a sloped roof</a>, and the risk of the waterproof membrane failing increases with exposure. Tears and punctures from foot traffic and blown debris are other common problems, especially with single-ply roofing membranes like TPO and EPDM roofs.</p></div>

Should all roofs have flashing?

• <div><p>Yes, all roofs can benefit from flashing. Roof flashing can protect a property from water damage, roof leaks, mold, and other serious issues. It’s vital if you’d like to extend the lifespan of your roof and avoid costly repairs down the road.</p></div>

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Verified Reviews for Roofing pros in Irwindale, CA

*The Angi rating for Roofing companies in Irwindale, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Roofing needs.

*The HomeAdvisor rating for Roofing companies in Irwindale, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Roofing needs.

Last update on October 31, 2025

Reviewed in October 2025
I hired Green Laser Roofing Company to fix a roof leak and apply a waterproof coating. The team was professional, friendly, and punctual throughout the entire project. They explained every step clearly and made sure the work was done to a high standard.
Green Ladder Roofing Company
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Reviewed in October 2025
They did a great job fixing a portion of our roof that was leaking! Very professional and clean which I appreciated. And most importantly, our roof no longer leaks, even after the thunderstorm we recently had!
Specialist Roofing and Repair, LLC
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Reviewed in December 2023
I had the privilege of choosing Roof Replacement Inc. for my roofing needs, and the experience was nothing short of exceptional. Victor and Adolfo, the duo leading this company, are true professionals. From the moment I engaged with them, their speed, communication, and overall dedication to...
Roof Replacement, Inc.
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Reviewed in May 2022
When I needed a new roof, I hired Reliable Roofing and am glad that I did. They were professional, trustworthy, and very reasonably priced. Plus, they did an excellent job on the repair - my roof looks brand new.
Reliable Roofing
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Reviewed in May 2022
Reliable Roofing is the one to call if you’re looking for a good roofing company. I recently had them repair my shingle roof after a previous roofing company ruined it, and they did an excellent job. The alignment of the shingles was perfect, and they even inspected the work once it was done to...
Reliable Roofing Company
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Reviewed in September 2021
They were on time and very courteous they even repaired other items on the roof that were a problem I would hire them for another roofing project
California Roof Experts
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Reviewed in August 2021
They were here to repair my roof in the heat of the pandemic. Besides getting the roof repair done, I was impressed that they observed Covid-19 protocols all through. Now that is respect.
Reliable Roofing
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Roofing questions, answered by experts

The most common defect in a flat roof is leaking. Flat roofs have minimal slope, so water pools more readily on a flat roof than on a sloped roof, and the risk of the waterproof membrane failing increases with exposure. Tears and punctures from foot traffic and blown debris are other common problems, especially with single-ply roofing membranes like TPO and EPDM roofs.

Roofing felt is the most common type of roof underlayment, likely because it has been around the longest. It’s called roofing felt because it is often made of felt soaked in asphalt. Depending on the type of roofing a home has, roofing felt comes in different thicknesses.

If properly installed and maintained, roofing felt should last between 10 and 25 years.

When choosing a roofer to install a green roof, look for someone with experience who specializes in green roofs. Rather than looking for a standard roofing contractor, you'll want to find a company that specifically offers green roofs. That company will have people on staff, such as a landscape architect, who understand the types of plants that thrive on rooftops.

The number of snow guards you’ll need on your roof depends on factors like the type of roof you have, its slope, the orientation of your home, and the snow load in your area. A local roofing professional or the snow guard manufacturer can help you determine the ideal amount.

Yes, all roofs can benefit from flashing. Roof flashing can protect a property from water damage, roof leaks, mold, and other serious issues. It’s vital if you’d like to extend the lifespan of your roof and avoid costly repairs down the road.

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