Below-Grade Waterproofing Membrane, Roof Primers, and Accessories

Below-grade structural waterproofing is necessary for preventing costly water damage to any part of the building below ground level. Appropriate waterproofing products and systems are needed to protect below-grade concrete structures like basements, underground parking, and foundation walls from water infiltration.

Polyglass’ range of structural waterproofing systems includes pre- and post-applied waterproofing membranes, and accessories for horizontal and vertical applications. Our solutions cover a wide range of technologies to meet varying designs and specifications for below-grade foundations, split slabs, and elevated plaza deck applications.

Explore our below-grade waterproofing products below.


From Concrete Foundation Walls to elevated decks, Polyglass® Structural Waterproofing Has You Covered

It’s critically important to protect the foundation of a building as it is constantly exposed to water and moisture from the ground and atmosphere. Waterproofing the foundation walls with our below-grade waterproofing membranes and accessories can be the best solution for preventing issues such as water exposure, and even structural damage to the building.

By preventing water infiltration and moisture buildup, Polyglass below-grade waterproofing can help to extend the lifespan of a building. Installing a Polyglass waterproofing membrane is an investment in the long-term health and longevity of your building’s foundation. Here are some of the benefits of below-grade waterproofing membranes:

Protection From Water Damage

Below-grade waterproofing is a crucial component in protecting a building’s foundation and other ground-level or underground structures from water damage. Water can penetrate through the soil and into the foundation walls, causing a variety of issues such as structural damage, mold growth, deterioration, and other water-related problems.

Without a proper waterproofing system in place, groundwater infiltration, rainwater, and surface water runoff can lead to moisture buildup and even flooding in the basement and below-grade areas (crawl spaces, tunnels, parking garages, and other subterranean spaces) of a building. This can compromise the structural integrity of the building and lead to costly repairs.

By installing Polyglass below-grade waterproofing solutions, building owners and contractors can ensure that their structures are protected from water damage. These systems create a barrier between the soil and the foundation walls, preventing water from seeping into the building. As a result, the membranes can increase the lifespan of the building by preventing water damage and minimizing the need for repairs. This can ultimately save you a lot of money in the long run.

Increased Property Value

A waterproofed foundation adds value to a property in many ways. First and foremost, it provides peace of mind to owners and potential buyers, knowing that the building is protected against water damage. Water damage can cause extensive structural damage and lead to mold growth, which can pose health risks to inhabitants and reduce the overall value of the property. If you’re a builder or contractor, this alone is worth investing in waterproofing.

Additionally, a waterproofed foundation can prevent costly repairs and renovations in the future. Water damage is not cheap to repair, and if left untreated, can lead to the need for major renovations or even a complete foundation replacement. With a below-grade waterproofing system, owners can prevent these issues and save money.

Finally, a water-resistant foundation can improve the overall aesthetics of a property. Uncontrolled water can cause unsightly damage to foundations, walls, and other surfaces. By waterproofing the area, owners can protect their investment from these unsightly issues, leading to a more visually satisfying and well-maintained property. All of these factors combined can make a building more appealing to potential buyers, leading to an increase in property value.

Health Benefits

Moisture intrusion is a common problem in basements and foundations everywhere. When water penetrates these areas, it creates a damp environment that is conducive to mold growth. Mold thrives in moist environments, and once it takes hold, it can be difficult and expensive to remove.

This not only damages the structural integrity of a building, but it can also pose health risks. Exposure to mold can cause respiratory problems and other health issues. People with compromised immune systems, such as the elderly, young children, and those with asthma or allergies, are particularly susceptible to the health effects of mold.

Using Polyglass waterproofing materials in your below-ground structures can help prevent moisture intrusion, which in turn helps prevent mold growth. By keeping moisture out of your building, a waterproofing system helps you maintain a healthy environment for your family, tenants, buyers, employees, or anyone else spending time in the building. Preventing mold growth can save property owners from the costly expense of remediation and repairs.

Cost-Effective

While the upfront cost of using the best waterproofing materials may seem high, it is a cost-effective solution in the long run. A properly installed waterproofing system can protect your building’s foundation and other below-grade structures for decades, preventing water damage and mold growth. This protection can ultimately save you thousands of dollars in repairs and renovations over the life of the building.

A Comprehensive Range of Below-Grade Waterproof Materials and Systems From Polyglass

Protect your building’s foundation and underground structures with Polyglass’ superior range of below-grade waterproofing products. Our pre-applied and post-applied waterproofing membranes provide durable and long-lasting protection against water intrusion and harsh weather conditions, preventing costly repairs and renovations in the future.

Polyglass is also the leading provider of roof waterproofing solutions, including innovative flat roof waterproofing products, waterproofing applications for parapet walls, roofing membranes for flat roofs, and much more. If you need help choosing the right waterproofing membrane roof, wall, or foundation solution, call us at (800) 222-9782 or contact us online.

Why Polyglass?

Polyglass® is an ISO 9001:2015 Certified, leading manufacturer of modified bitumen roofing and waterproofing membranes and roof coatings for low- and steep-slope applications. We are an industry leader in self-adhered underlayments that are specially designed to help contractors save time and labor costs.

Utilizing the most technologically advanced manufacturing process in the industry, Polyglass operates six state-of-the-art manufacturing facilities — five in North America and one in Italy that serves all of Europe.

As a company that prides itself in innovative and quality roofing products that exceed the needs and expectations of its customers all around the world, we offer roofing contractors the following benefits:

  • An extensive line of underlayments and other roofing products that allow for custom-designed solutions for unique construction challenges and environmental conditions
  • Outstanding technical support and project assistance
  • The most trusted warranties in the industry
  • A registered contractor program and a wide array of contractor resources, including instructional videos to Polyschool courses.
  • The ability to earn points and redeem prizes for every Polyglass purchase with Club Premio