Maintenance
8 min read

Weather in the Pacific Affects the Lifetime of a Flat Roof

Discover how the Pacific Northwest's rain affects flat roofs and essential maintenance tips to prolong their lifespan.
Written by
Alex Koyev
Published on
January 18, 2024

Why we are affected by flat roofs? It's no secret that the Pacific Northwest has a lot of rain. It's said that we get more rainfall than any other part of the country. So, does this constant downpour take its toll on flat roofs? The answer may surprise you!


Roofing materials are designed to withstand certain climates, and when they are exposed to extreme temperature fluctuations, high winds, and heavy precipitation(like it is in PNW), they may have a shorter lifespan than the same roofing material in another climate. Flat roofs are especially susceptible to these conditions, and if they are not properly maintained, they may not last as long as they would in a milder climate.


affect flat roof, Leaky Flat Roof Portland, OR


But Why?

Sadly, 80% of roofs are replaced prematurely due to improper installation or lack of maintenance. Does PNW weather affect it that much? Take a read at some of the reasons flat roof leaks.


1. Poor Drainage

One of the primary reasons that flat roofs leak is poor drainage. Flat roofs are designed to shed water, but if they are not properly sloped, water can pool on the surface and eventually seep into the roofing material. Additionally, if gutters or downspouts are not installed, water can run off of the roof and onto the building’s facade, causing leaks.


2. Cracks and Blisters

Another common cause of flat roof leaks is cracks and blisters in the roofing material. Over time, UV radiation, extreme temperatures, and physical wear and tear can cause the roofing material to break down, creating cracks and blisters. These openings provide a path for water to enter the building, which can lead to leaks.


3. Poor Maintenance

Poor maintenance is also a common cause of flat roof leaks. Like all types of roofs, flat roofs need to be inspected regularly for signs of damage or wear and tear. If repairs are not made promptly, small problems can quickly turn into larger ones that will be much more expensive to fix.


Asphalt Flat Roofs

Asphalt flat roofs are especially susceptible to the damaging effects of rain. The rain can cause the roofing material to deteriorate and leak, which can lead to serious damage to the underlying structure of the building.


Single-Ply Flat Roofs

Single-ply flat roofs are made from a single layer of synthetic materials, usually PVC or TPO. They are popular in the Pacific Northwest because they are affordable and durable. However, they are also susceptible to the damaging effects of rain.

why affect flat roof, Leaky Flat Roof Portland, OR


How Much Rain Does The PNW Get?

Seattle and Portland are some of the rainiest cities in the United States. They both get well over 30 inches of rainfall each year, and that can take a toll on flat roofs.


Since these cities are so populous, they have a lot of flat roofs. Unfortunately, many of these roofs are not well maintained, which can lead to costly leak repairs.


Should I Get a Different Commercial Roofing System?

Flat roofs are popular because they are less expensive than pitched roofs and are easier to maintain. However, they are not as effective at shedding water as pitched roofs. As a result, they are more susceptible to leaks and damage from severe weather. Flat Roof Pros, Inc. does not recommend that customers replace their roofs with a different roofing system as it can be very costly and easily avoided by inspecting their roofs to make sure that there are no issues with water drainage.


Debris buildup is one of the leading causes of water damage on flat roofs. In Portland, Oregon, where it rains a lot that can spell trouble. When leaves and twigs accumulate on a flat roof, they prevent water from draining properly. Over time, this can lead to leaks and other problems. The best way to prevent debris buildup is to keep the roof clean and clear. That means regularly sweeping away leaves and twigs, and removing any other debris that could clog up the drains. By taking these simple steps, you can help keep your flat roof in good condition for years to come and not have to shell out thousands of dollars on a new roofing system.


affect flat roof by weather, Leaky Flat Roof Portland, OR


What Should/Can You Do To Stop leaks?

Fortunately, we have another article that talks about "Vital Flat Roofing Practices for Business Owners in Portland, OR." You can read it here. Nevertheless, below are three things you should do to stop leaks and extend your roof's lifespan.


1. Use a Quality Roofing Material

One of the most important things you can do to prevent your flat roof from leaking is to use a quality roofing material. There are a variety of different roofing materials on the market, but not all of them are created equal. You'll want to make sure you choose a material that is durable and weather resistant. Some of the best materials for flat roofs include EPDM rubber, PVC, and TPO.


2. Install a Drainage System

Another important thing you can do to prevent your flat roof from leaking is to install a drainage system. A drainage system will help to collect water that leaks onto your roof and channel it away from your building. This will help to reduce the amount of water that seeps into your building and prevents serious damage from occurring.


3. Perform Regular Maintenance

It's also important to perform regular maintenance on your flat roof to prevent leaks. You'll want to inspect your roof regularly for signs of wear and tear and make repairs as needed. You should also have your roof cleaned regularly to remove any dirt or debris that could clog up your drainage system.



affect flat roof 2023, Leaky Flat Roof Portland, OR



Where Do I Get A Quality Flat Roof Inspection?

You can get a free flat roof inspection from Flat Roof Pros, Inc. We will come out to your business and inspect your roof for damage or wear and tear. If we find any problems, we will recommend the necessary repairs.


We understand that flat roofs can be expensive to repair, so we offer affordable solutions that will keep your roof in good condition. Contact us today to schedule your free inspection!

Last Thoughts

If you want to make sure that your flat roof lasts as long as possible, you need to take proper care of it. By using quality roofing material, installing a drainage system, and performing regular maintenance, you can keep your flat roof in good condition for years to come. And, best of all, you'll save money in the process. So, if you're looking for an affordable way to keep your flat roof in good condition, be sure to follow the tips in this article.


Concerned about the longevity of your flat roof, or if you've been experiencing leaks, then be sure to get a free inspection from Flat Roof Pros, Inc. We offer affordable solutions that will keep your roof in good condition. Contact us today to schedule your free inspection! click here

Weekly newsletter
No spam. Just the latest releases and tips, interesting articles, and exclusive interviews in your inbox every week.
Read about our privacy policy.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.

Not Sure? Start with a free inspection!

Book your no-cost inspection today and take the first step towards peace of mind.