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Seattle Metro Area : 253-589-8999253-589-8999 201-594-0900
Toolbelt and nail gun laying on unfinished roof

When To Consider A Commercial Roof Replacement

Toolbelt and nail gun laying on unfinished roof

toolbelt and nail gun laying on unfinished roof

If you know your business’s roof hasn’t been replaced for many years, it can be stressful when you find a problem with it, since it likely means a replacement is on the horizon.

Repair Vs. Replacement

In general, our roofers at McDonald & Wetle can work with you to determine whether your commercial space is in need of extensive repairs or a replacement. Often, it comes down to cost — if the estimated cost of repairs exceeds that of a commercial roof replacement, for example, it typically makes more sense to get your roof replaced completely, either with a new roofing type or the same type.

Factors Determining A Commercial Roof Replacement

1. Water Damage

Water is the enemy of commercial roofs, and keeping it out can often be challenging. If you’re having problems with water infiltration, it may be a sign that your roof needs extensive repairs or may need to be replaced in certain spots.

Usually, a thorough assessment is needed to determine the extent of water damage to a commercial roof. Keep in mind that while the roof membrane may appear to be in good condition, the material underneath may be damaged caused by water trapped beneath the roof’s surface.

2.Extensive Membrane Damage

The primary purpose of a roof membrane is to move water off the roof. Commonly used in commercial applications, they’re usually made of rubber, thermoplastic, or modified asphalt. When this membrane has become severely split or experienced severe uplift thanks to strong Seattle or Portland winds, it may be time for a roof replacement. Corners, seams, parapets, and other common problem areas should also be checked for damage.


If there is mold growth on or under your roof, this is a sign it should be replaced. Mold can form when there are undetected roof leaks, and this can also cause an unpleasant smell in interior spaces.

4.Missing Shingles or Holes

Missing shingles provide an easy entrance for rainwater into the interior space of your business. Sometimes this can be fixed with a commercial roof repair, but in other cases, if the damage is extensive, replacement may be needed. At McDonald & Wetle, we work closely with your business to help determine the best solution for your situation.

5.Lack of Roof Maintenance

If a commercial roof isn’t maintained or inspected regularly, such as every two years, it’s possible this can lead to an eventual need for replacement. Roof maintenance is an important part of the services we offer at McDonald & Wetle.

Roof Repairs

Seeking out repair services right away from McDonald & Wetle is important to prevent more extensive issues. When water damage is discovered, plans should be made for its repair as soon as possible to ensure your business can continue to operate uninterrupted.

Our service technicians inspect commercial roofs to help determine the source of the problem and provide necessary repairs that fix the problem and help prevent future leaks.

Call McDonald & Wetle For Commercial Roof Installations And Repairs

If you think you need to replace your commercial roof, contact the roofing professionals at McDonald & Wetle. We are a family-owned company that’s been in business since 1921 providing quality commercial services for our customers in Seattle, WA, and Portland, OR. Contact us for assistance with your commercial roofing system selection, budgeting, and maintenance planning. In Seattle, call 253-589-8999, and in Portland, call 503-667-0175 for assistance.