Flat roofs face unique challenges in Calgary’s harsh winters. Snow buildup, ice dams, and extreme temperature fluctuations can quickly expose weaknesses in a roofing system.

Property owners who want lasting protection turn to modern flat roof solutions like TPO roofing and SBS multi-ply self-adhered roofing systems. These materials combine durability, flexibility, and energy efficiency, making them the top choice for withstanding cold weather conditions.

In this blog, we’ll explore what makes TPO (Thermoplastic Polyolefin) and SBS (Styrene-Butadiene-Styrene Modified Bitumen) roofing the preferred solutions for flat roofs in winter climates, and why choosing the right system from a trusted roofing contractor in Calgary (like us here at AKRoN Roofing!) can make all the difference.

Understanding TPO Roofing Systems

What Is TPO Roofing?

TPO (Thermoplastic Polyolefin) is a roofing membrane made in layers. While the top and bottom layers are smooth, waterproof sheets made from rubber and plastic polymers, the middle layer — often referred to as the fabric core or scrim— is a strong, woven reinforcement mesh. This mesh is usually made from polyester and gives the membrane its structural strength.

Think of it like a three-layer sandwich:

• The top layer resists weather, UV, and heat.
• The middle fabric scrim is like a net or fabric weave that adds tear resistance and stability.
• The bottom layer helps with adhesion and bonding to insulation or substrate layers.

This scrim-reinforced structure allows the membrane to stay lightweight and flexible while also being extremely tough — helping it withstand foot traffic, thermal expansion, and uplift from wind.

So, while it may look like a simple sheet of rubber, TPO is actually an engineered multi-layer system — and that fabric core is what gives it both flexibility and tensile strength.

Key Benefits of TPO Roofing in Cold Weather

• Superior flexibility in freezing temperatures
  TPO membranes remain pliable even in extreme cold, preventing cracks and tears.
• Strong seam performance
  Heat-welded seams create a watertight bond, reducing the risk of winter leaks.
• Resistant to mould and dirt accumulation
  Important when melting snow leaves standing water on flat roofs.

Why TPO Roofing Stands Out in Calgary

According to AKRoN Roofing’s TPO expertise, the product has quickly become a go-to solution for both commercial and residential flat roofs in Alberta. Its ability to handle extreme weather shifts makes it especially suited for local climates.

Exploring SBS Roofing Systems

What Is SBS Roofing?

SBS stands for Styrene-Butadiene-Styrene — a type of rubber-modified asphalt. It’s used in roofing systems that come in rolls and are installed in two or more layers: typically a base sheet and a cap sheet. These sheets are unrolled directly onto the roof and stick down without the need for open flame or hot tar, thanks to their self-adhering backing.

Because SBS is rubberized, it’s far more flexible and durable than traditional asphalt, especially in cold temperatures. It can expand and contract with the weather without cracking — a major advantage in Alberta’s extreme climate.

Advantages of SBS Roofing in Winter

• Cold-weather flexibility
  SBS membranes stay flexible in freezing conditions, so they won’t crack or split during freeze-thaw cycles.
• Exceptional waterproofing
  The multi-layer system offers multiple lines of defence against water intrusion.
• Impact resistance
  SBS absorbs impacts from hail, ice, and foot traffic better than most other roofing types.
• Proven durability in Canadian climates
  SBS roofing is engineered to handle snow loads, ice buildup and temperature swings – all common in Alberta.

SBS Roofing for Alberta Properties

Here at AKRoN Roofing we find that SBS systems like Malarkey’s OmniSeal series are a smart, long-lastsing choice for flat and low-slope roof sections. Their cold-weather performance, self-adhered installation, and long-term durability make them especially appealing for property managers seeking low-maintenance, leak-resistant solutions in harsh climates.

While TPO is a great choice for large, flat commercial roofs where reflectivity and energy savings are key, SBS 2-ply roofing systems are the go-to solution for targeted low-slope areas prone to water collection or visible to occupants or pedestrians.

At AKRoN Roofing, we recommend SBS systems like Malarkey OmniSeal for:

• Dead valleys where snow or water can accumulate.
• Eyebrow dormers, porches, or walk-out overhangs that are visible and exposed to heavy weather.
• Under-window areas or partial roof sections where the slope is insufficient for shingles and appearance matters.

The self-adhered, multi-layer system offers added peace of mind in these vulnerable locations without requiring torches or hot-mop. It’s our preferred method for durability, flexibility, and clean finish in critical low-slope roof transitions.

Comparing TPO And SBS Roofing For Flat Roofs

Feature	TPO Roofing	SBS Roofing
Material	Thermoplastic single-ply membrane	Rubber-modified asphalt membrane
Cold Flexibility	Excellent – remains flexible in sub-zero temperatures	Excellent – resists cracking in freeze-thaw cycles
Seam Protection	Heat-welded for watertight durability	Multi-layer with adhesive-backed sheets for added leak protection
Energy Efficiency	High – White surface reflects sunlight, reducing cooling costs	Not reflective; energy efficiency is not a primary benefit
Impact Resistance	Strong, but slightly less than SBS	Superior – handles hail, ice and snow loads in vulnerable areas
Colour Options	White (standard)	Limited — typically 2–3 granule colours available in Alberta
Best Use Case	Large flat roofs, energy savings focus	Small low-slope areas: dead valleys, eyebrows, porch roofs, window wells on second storeys

Why Professional Installation Matters

The performance of TPO and SBS systems depends heavily on professional installation. Poorly sealed seams or improperly applied membranes can lead to winter leaks, even with premium materials.

By hiring an experienced roofing company in Calgary like AKRoN Roofing, property owners gain:

• Access to certified installers for GAF, CertainTeed, Elevate, and Johns Manville products
• Proper insulation and ventilation setup for maximum energy efficiency
• Expertise in drainage solutions to prevent ice dams and water pooling
• Long-term warranties backed by manufacturer standards

Seasonal Maintenance for Flat Roof Longevity

Even the best systems can benefit from occasional attention to ensure long-term performance. This maintenance should only be performed by a professional:

• Assessing whether snow removal would be beneficial for your roof (most roofs can handle some snow, and water pooling is not a concern for TPO)
• Inspecting seams and edges for signs of wear after storms
• Cleaning eavestroughs and drains to prevent blockages
• Scheduling annual professional inspections with your favourite Calgary roofing contractors, AKRoN Roofing!

About AKRoN Roofing

At AKRoN Roofing, we provide and install luxury roofing products designed for Calgary homes and businesses. Our expertise covers both sloped and flat roof solutions, premium shingle systems, flat roof membranes, metal roofing, and other exterior solutions.

With over 25 years of hands-on of experience installing products like Euroshield, GAF, Certainteed, and TPO membranes, we deliver sloped and flat roofing solutions that combine durability with long-term value.

If you’re looking for expert roofing contractors in Calgary who can help protect your home or business this winter, contact us today to discuss your roofing needs.