Serving Phoenix & the Valley Since 1989Licensed ROC223900
Owner · Durafoam Roofing · Phoenix, AZ
Tim is co-owner of Durafoam Roofing, the family-owned Phoenix foam roofing company founded by his father Steve in 1989. He's the recurring foam-roofing expert on Rosie on the House and the voice behind the interview-style articles on this site.
Durafoam Roofing was founded in 1989 by Steve Forstie with one principle: produce the highest quality roof possible at an affordable cost. Steve's sons Tim and Curtis grew up on Phoenix rooftops learning the trade from him, and took over running the company as co-owners.
That continuity is why homeowners who called Durafoam in the '90s still call today: it's the same family, the same craftsmanship, and the same repair-first approach — no salespeople, no upsells, no pressure.
Rosie on the House — Arizona's longest-running home-improvement radio show and podcast — has certified Durafoam as its foam-roofing partner since 1996. Tim has appeared on the show multiple times to walk Arizona homeowners through foam roofing, maintenance, and monsoon-season repairs.
June 2026 · Rosie on the House
A Guide to Foam Roofing with Durafoam Roofing
May 2024 · Rosie on the House
The Particulars of Foam Roofs with Tim Forstie of Durafoam Roofing
See every media appearance on the Rosie on the House hub page.
"The primary reason to use foam is the insulation factor it provides."
"Many of the old roofs we do can be recovered with foam. We clean and prepare the existing membrane and then install the Durafoam system over the top. The process saves on costs for the homeowner and helps the environment by keeping old roofing materials out of our landfills."
"We recommend that homeowners have their roofs inspected annually to catch potential problems before they can cause costly repairs."
Interview-style Q&A articles written directly from Tim's answers on Phoenix foam roofing.
The install price is the small question. Here is how foam compares to single-ply across 30 years of ownership, once tear-offs, disposal, and downtime are counted.
Yes — on a flat or low-slope Phoenix roof, spray foam is the best system available. Here is the honest case for it, including the three real downsides.
What SPF actually is, what happens on each day of the job, how thick the foam should be, and why the coating — not the foam — decides how long your roof lasts.
Most roof damage shows up long before water reaches your ceiling. Here is exactly what to look for on a Phoenix roof, inside and out, and how to tell urgent from routine.
A ceiling stain does not automatically mean your entire roof is failing. Tim Forstie explains how to narrow down the source, handle simple issues safely and recognize when a leaky roof requires professional repair.
The best roof for a Phoenix home depends on the house—not simply which material costs more or looks better. Durafoam Roofing owner Tim Forstie explains how roof slope, structural load, insulation, drainage and existing conditions determine whether foam, tile or shingles make the most sense.
How long does a roof last in Arizona? Tim Forstie, owner of Durafoam Roofing, says material matters, but installation, maintenance, drainage and sun exposure often reveal more than the roof’s age. Here is what he sees after decades of inspecting, repairing and installing roofs in the Phoenix area.
For most flat and low-slope Phoenix homes, Tim Forstie considers spray polyurethane foam the first choice—but the existing roof, moisture, decking, penetrations, and drainage all affect the decision. Here is how foam, TPO, and built-up roofing compare based on the conditions he sees on Arizona roofs
A roof can take in water during an Arizona monsoon without producing an obvious ceiling drip. Tim Forstie, owner of Durafoam Roofing, explains which early clues Phoenix homeowners should look for and shares a recent inspection where an overlooked opening had already caused structural damage.
Since 1989, our family at Durafoam Roofing has been keeping Phoenix homes dry under the Arizona sun. We asked our owner, Tim, to share his expert insights on the most common foam roof problems he sees while out on the job and how you can spot them before they turn into costly repairs.
Since 1989, our team at Durafoam Roofing has been protecting Arizona homes from the relentless desert sun. We sat down with our owner, Tim, who has been on Phoenix rooftops for over three decades, to answer the most common questions about why foam roofing is the gold standard for our unique climate.
Identifying early warning signs is the best way to extend the lifespan of your roof and avoid costly interior damage. With hands-on experience across the Phoenix valley since 1989, our owner Tim has seen it all and is sharing his expertise on what you should look for. Here is Tim’s guide to knowin
Choosing the right contractor for your home is a major decision, especially given the unique challenges of the Arizona climate. Our owner, Tim, has been on Phoenix rooftops since 1989 and knows exactly what homeowners should watch out for. We sat down with him to get his expert take on the mu
Free, no-pressure inspection. Repair-first — we won't recommend a replacement your roof doesn't need.
