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Flat Roofing Service

Energy-Saving PVC Roofing Solution

Our residential and commercial flat roofing solutions are designed to resist the harsh elements of Portland’s climate, including rain, wind, ice, and sun, without requiring any maintenance. With our flat roofing system, you can have peace of mind knowing that your roof can withstand even the harshest weather conditions. Additionally, our flat roofing products are equipped with self-cleaning features, eliminating the need for you to go on the roof. Our expert roofers can quickly and easily handle the job in case of damage or necessary changes. At Dial One Roofing, we offer several flat roofing products, and our team is trained to install each one. Whether you have a small office building or an industrial complex, we have the right commercial flat roofing solutions for your needs.

Need Your Flat Roof Repaired?
A light-weight and permanent option:
  • Lifetime warranty
  • Lightweight
  • Requires no maintenance
  • Ten colors and thickness
  • High reflectivity

We utilize both IB Roof Systems and Duro Last for their quality, dependability, and high energy efficiency performance.

Our commercial flat roofs have evolved from traditional hot tar, buildup, and gravel roofing methods. These outdated techniques are now a thing of the past, along with their associated problems of smelly tar kettles, dangerous fumes, and leaky roofs. Our commercial flat roofing solutions are now maintenance-free, thanks to the latest single-ply roofing materials. These materials are lightweight yet strong and are designed to reflect most of the UV light, providing excellent protection against weather conditions while reducing energy costs. Our commercial single-ply roofing installations are completed without any mess or ongoing maintenance, making them a perfect solution to keep the heat and rain out of your commercial space in Portland, Oregon.


Shielding your building from the elements is essential for your comfort and protection. IB Roof Systems provides complete system solutions coupled with the confidence of up to a 30 year Total Systems Warranty.


IB PVC’s high solar reflectivity reduces energy waste, lowering monthly heating and cooling costs. Additionally, it is one of the few building materials that can be fully recycled into new roofing products, even after decades of service life.


IB Roof System’s products are specifically engineered for strength and our PVC roofing membranes far surpass the minimum ASTM standard (200 lbf/in. rating), having a minimum typical breaking strength of 332 lbf/in. or higher. Not all PVC is built like IB PVC.


IB Roof System’s membranes use heat-welded seams, forming a permanent, watertight bond that is actually stronger than the membrane itself. Other roofing systems rely on adhesives, tapes, and caulks to seal the seams, and are inherently less durable.


IB PVC roofing membranes can be used in many UL Class A roof assemblies. These membranes show excellent resistance to spread of flame and self-extinguish when the source of the flame is removed. IB PVC roofing membranes have passed stringent fire testing standards at both UL and FM, and are approved for use in Low, Steep and Unlimited slope assemblies.


With their engineered strength and heat-welded seams, IB Roof System’s PVC roofs have superior wind uplift resistance. An IB PVC roof is the best choice for many buildings located in challenging climate zones and in regions prone to strong winds.


IB PVC membranes stand up to constant dampness and ponding water, and resist the effects of severe weather extremes. There is no exclusion in our warranty for ponding water.


IB Roof System’s PVC provides the best quality membrane and complete roofing solutions.

  • Duro-Last PVC Membrane available in 40, 50 and 60 and 80 mil thickness.

Available in These Colors –



Commercial Flat Roofing

We have built our long-term relationships as a roofing contractor with our customers by listening to their needs and determining the best flat roofing systems and products for their buildings, and by advising which will last the longest with the least amount of maintenance.

Dial One Roofing’s commercial flat roofing programs and repairs ensure customer satisfaction by providing outstanding service, detailed project specifications, and preventive maintenance plans.

Because we are a sheet metal fabricator, we can complement every flat roofing job with our sheet metal services. Our technically trained crews install top quality sheet metal applications and adhere to roofing contractors and manufacturer’s standards.

Let us show you why so many building owners have trusted Dial One Roofing with their roofing needs. Call us at (503)-244-4300 to schedule an estimate for your roofing project, or to have your roof evaluated for its current life expectancy.

PVC Membrane Roofing

flatroofs-i2Tar roofs are out, PVC is in! A lesser known fact about flat roofs is that the roof products have changed.

The ‘hot tar roof’, installed with hot tar and a mop has been replaced by a thin, lightweight PVC membrane.

This product has no oils to reach out, no shrinkage, or areas for moss and debris to build up.
And because it’s a membrane, we can perform services to build up certain areas and divert the water anywhere we want it to go!


No re-trussing, just add some thick foam underneath that’s cut at an angle, and it’s no-more-standing water!
This pure white roof will reflect most of the sun’s rays from building, and will last decades!

We Are Certified Flat Roofing Installers

  • Certified Installers for a Lifetime warranty
  • We carry most flat roof products
  • Installing flat roofs since 1979
  • Fast efficient service
  • All tools on board for quick repairs

flatroofResidential Flat Roofing

For decades we searched for the perfect residential flat roof solution. And finally, we found it. Single ply membranes may be something you have never heard of, but you will! Our flat roofing products are a simple proven way to solve all roofing problem, at the same time providing a heat resistant, UV reflecting barrier for your home. Maintenance free, and completely impermeable to rain or the elements, our flat roofing membrane for residential homes is the perfect roofing solution for flat problematic roofs. And if ponding is a problem, we can easily design an anti-ponding solution for your situation. We can even build a maintenance free, self-cleaning gutter system so you will never have to get on the roof!

Dependable Long Lasting Flat Roofs For Your Home

ib-flat-roof-residentialWith a Lifetime Warranty on materials, our residential flat roof products are made to withstand the test of time. Quality flat roof installations have been the cornerstone of Dial One Roofing’s business for over 20 years, and we only install roofing products that come with a lifetime warranty. Don’t worry if you have never heard of single ply flat roofing membranes, they have been around for a long time. As a certified installer of these products, Dial One Roofing will design a self-cleaning system, one that is maintenance free, will reflect UV heat from the sun, and will divert water properly. As your flat roof installer, you can depend on us for all of your flat roofing needs. We have the products and expertise ready for your residential flat roofing project.

Rain, wind, ice, and sun all have a hand in roof deterioration. Our residential and commercial flat roofing will completely resist all the elements of Portland’s harsh environment, at the same time require no maintenance. The flat roofing system can be designed to withstand the harshest punishment, and even incorporate self-cleaning features, so you will never need to go on the roof. If there is ever any damage or some changes are necessary, it can be easily handled in just a few minutes. Dial One Roofing is an installer of several

flat-roofing-003different flat roofing products, and our roofers are trained to install each. Whether your building is a small office building or an industrial complex, We have the flat commercial roofing products that are right for your commercial flat roof.

A light-weight and permanent option:
  • Lifetime warranty
  • Lightweight
  • Requires no maintenance
  • 10 colors and thickness
  • High reflectivity



Our Reviews

Dozens of positive customer reviews. View some of them here!


Extensive Roof Warranty

Your home is protected with the Owens Corning Preferred Contractor Roofing Warranty.


Best in Class Workmanship

Professional Workmanship & Qualify of Service.


Outstanding service

Trusted in Oregon with a proven track record since 1979


The Right Balance

Improve air quality in your home by properly balancing the ventilation in the attic.


Our Safety Promise

The Safety for Our Employees and Clients.