top of page

Durable Solutions for Flat Roof Waterproofing

Tenera was approached by the property management of a high-rise residential building situated on Lee Centre Dr. in Scarborough. Their request involved developing specifications for the waterproofing of both the upper and lower flat roofs, encompassing areas of 4,400 SQF and 2,600 SQF, respectively.

Importance of Flat Roof Waterproofing

Maintaining flat roofs in optimal conditions is of paramount importance in ensuring the structural integrity and longevity of buildings. Flat roofs are particularly vulnerable to water damage due to their lack of slope, which can lead to pooling of water and subsequent leaks if not properly maintained. Additionally, flat roofs often serve as utility spaces for HVAC systems and other equipment, making them susceptible to frequent foot traffic and potential damage. If the penetrations caused by such equipment are not waterproofed properly, the roof will leak affecting the units below.

Repair Method

The contractor was instructed to carry out the repair in phases due to the presence of gravel which had to be set aside to allow for the waterproofing work to be done. Subsequently, the geotextile and polyurethane-based insulation layers were removed to expose the underlying EPDM membrane, originally installed during construction. Any deteriorated sections of the membrane were removed before the surface was coated with a primer, paving the way for the application of a new polyurea-based membrane.

Following membrane application, insulation and geo textile layers were reinstated to provide additional protection and insulation. Finally, the displaced gravel was returned to its original position, ensuring the aesthetic and functional integrity of the roof. This sequence of steps was repeated until the entire roof surface on both roofs was waterproofed.

Waterproofing flat roofs is essential for maintaining the structural integrity and longevity of buildings. By following repair specifications and utilising high-quality materials, contractors can ensure lasting results that will mitigate the risk of water damage and costly repairs in the future.

Learn more about our solutions for flat roof repair and waterproofing by visiting this page:


bottom of page