When your building has a flat or low-slope roof, you need a system that can handle Montana’s heavy snow, high UV exposure, and wide temperature swings.
At Sisu Roofing, we install TPO (Thermoplastic Polyolefin) roofing systems designed for long-term energy efficiency, durability, and watertight performance.
TPO is one of the most widely used materials for commercial roofing today—ideal for warehouses, multifamily complexes, offices, schools, and retail buildings across the Flathead Valley.
TPO is a single-ply roofing membrane made from a blend of rubber and thermoplastic materials. It’s lightweight, reflective, and highly resistant to punctures, ozone, and UV radiation.
Unlike older flat roofing systems that rely on adhesives, TPO membranes are heat-welded along the seams—creating a continuous, watertight bond that stands up to years of harsh Montana weather.
While TPO is primarily used on commercial and multifamily buildings, it’s also an excellent choice for modern residential homes or additions with flat roof sections, where energy efficiency and clean aesthetics matter.
Our TPO roofing services include:
TPO’s bright white surface reflects sunlight, reducing heat absorption and helping lower cooling costs in warmer months—perfect for commercial buildings with large roof areas.
Seams are heat-fused rather than glued, creating one of the strongest and most reliable waterproof seals available in flat roofing.
TPO membranes resist cracking, shrinkage, and UV degradation—delivering 20–30+ years of service life with proper maintenance.
Because TPO is a single-ply system, it adds minimal load to your structure and is easy to inspect, repair, or coat over time.
TPO is fully recyclable and contains no plasticizers or chlorine—helping your property meet modern sustainability goals and LEED standards.
We evaluate your current roof’s condition, identify problem areas, and recommend the best system configuration based on slope, drainage, and insulation needs.
You’ll receive a detailed, itemized proposal outlining TPO thickness, fastening methods, and available warranty options from trusted manufacturers.
Our certified crews install insulation layers and mechanically fasten or fully adhere the TPO membrane. Seams are heat-welded for leak-proof protection, with all flashings and penetrations reinforced.
Each project concludes with a detailed inspection, photo documentation, and magnetic cleanup—leaving your property spotless and your roof ready for decades of performance.
We install and service TPO roofing systems in Kalispell, Whitefish, Columbia Falls, Bigfork, Lakeside, Somers, Evergreen, and surrounding communities.
Whether you manage a retail building, apartment complex, warehouse, or office, Sisu Roofing provides the craftsmanship and professionalism you can depend on.
What does TPO stand for?
TPO stands for Thermoplastic Polyolefin, a durable single-ply roofing membrane used on flat or low-slope roofs.
How long does a TPO roof last?
Most TPO roofs last 20–30 years or more, depending on membrane thickness and maintenance.
Is TPO only for commercial buildings?
It’s most common in commercial use, but we also install TPO on residential flat roofs, additions, and modern-style homes that benefit from its reflective properties.
How is TPO different from EPDM?
TPO is a white, heat-welded thermoplastic membrane, while EPDM is a black rubber membrane adhered with tape or glue. Both are excellent, but TPO offers greater reflectivity and welded seams.
Can you install TPO over my existing roof?
In many cases, yes. We can install TPO over a sound existing substrate, saving on tear-off costs while maintaining full manufacturer warranty compliance.
Ready to protect your property with a high-performance TPO roofing system?
Call (406) 885-6522 or contact Sisu Roofing online to schedule your free site visit and estimate.
Sisu Roofing – Built for Montana’s Weather.
Homeowners call us when they want clear communication, clean job sites, and roofs that hold up to real Montana weather.
Malarkey Certified Installer – Access to upgraded shingle systems & manufacturer-backed warranties
Licensed & Insured – Proper coverage for your home and our crew
Local & Accountable – Based in Kila; serving all of the Flathead Valley
We believe great projects start with clear expectations. Here’s what you can count on every time we show up:
Straightforward Quotes – No upsells or hidden costs
Respect for Your Property – Clean job sites and full debris removal
Reliable Scheduling – We show up when we say we will
Follow-Through – We inspect every detail before we call it complete
Emma Robertson
Business Owner
Emma Robertson
Business Owner
Steve Cohen
Small Business Owner
Michael Dell
First-Time Homeowner
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