What to Expect During a Commercial Flat Roof Replacement
If your commercial flat roof is starting to leak, bubble, or show its age, it may be time for a full replacement. A new flat roof isn’t just about fixing problems — it’s about protecting your investment for decades to come. At AP Roofing Company, we’ve replaced hundreds of commercial roofs across Spokane and know exactly what it takes to get the job done right.
Here’s what you can expect during a professional flat roof replacement.
1. Roof Inspection and Evaluation
Before any work begins, our team thoroughly inspects your existing roof to determine its condition. We check for moisture trapped under the membrane, structural damage, insulation issues, and any drainage problems.
This inspection helps us choose the best materials — whether that’s TPO, PVC, EPDM, or a modified bitumen system — and plan the replacement safely and efficiently.
2. Project Planning and Estimate
After inspection, we’ll provide a detailed estimate outlining labor, materials, and project timelines.
Our goal is transparency from start to finish, so you’ll always know what to expect and when. We also coordinate with property managers to minimize disruption to your business during the project.
3. Tear-Off and Surface Preparation
Next, we remove the old roofing materials down to the deck. If we find damaged decking, we replace it before installing new insulation and membranes.
A clean, solid base is key to the longevity of your new roof — skipping this step can lead to future leaks and failures.
4. Installation of New Roofing System
Once the deck is prepped, we install new insulation boards and your chosen roofing membrane.
TPO and PVC roofs are heat-welded for a watertight seal.
EPDM roofs are adhered or mechanically fastened.
Modified bitumen systems are applied in layers for added strength.
Proper installation ensures durability, weather resistance, and compliance with manufacturer warranties.
5. Flashing, Sealing, and Drainage
Flashing and drainage details are some of the most important parts of any flat roof.
We seal around HVAC units, vents, and parapet walls to prevent leaks and ensure water drains correctly through scuppers or internal drains.
6. Final Inspection and Warranty
Before we leave, we inspect every seam, joint, and flashing. Then, we provide warranty information and maintenance recommendations to help your new roof last as long as possible.
Why Choose AP Roofing Company?
With over 1,000 roofs completed in Spokane, we’ve built our reputation on quality, honesty, and reliability. Whether you manage a warehouse, office building, or retail space, our team delivers commercial roofing solutions built to last.
Ready to replace your commercial flat roof?
Contact AP Roofing Company today for a free inspection and estimate.
📞 Call 509-844-1244