TPO Roof Cost in Montreal

TPO roofing is a single-ply thermoplastic membrane that is mechanically attached or fully adhered to the roof substrate. Its heat-welded seams create a monolithic, watertight surface that is highly resistant to leaks. The white reflective surface of TPO reduces cooling costs in summer by reflecting solar radiation, though this benefit is less significant in Quebec where heating costs dominate the energy equation. TPO costs are influenced by the membrane thickness (typically 45 mil, 60 mil, or 80 mil), the attachment method, the condition of the existing roof, and the complexity of the roof layout. Thicker membranes cost more but offer better puncture resistance and longer service life. Mechanically attached systems are generally less expensive to install than fully adhered systems but may not be suitable for all roof configurations. Compared to elastomeric membrane, TPO offers a different set of trade-offs. TPO is a single-layer system with heat-welded seams, while elastomeric is a two-layer torch-applied system. TPO is typically lighter and can be installed at lower temperatures than torch-applied systems, extending the installation season. However, elastomeric membrane has a longer track record in Quebec and many roofers have more experience with it. TPO installation around penetrations, curbs, and parapet walls requires prefabricated accessories and careful welding technique. The quality of these details is critical to long-term performance. Poorly welded seams or details can separate over time, especially under the stress of Quebec's temperature extremes. Insulation can be integrated into the TPO system, and tapered insulation boards can be used to create proper drainage slope on flat roofs that have ponding issues. [PRICING DATA TO BE RESEARCHED AND ADDED] Contact us for a TPO roofing consultation. We help you compare options and choose the best system for your building.