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Ballasted Roofing System in Minnesota

Roofing systems

Ballasted Roofing System

A ballasted roof means that the roof membrane is not anchored or adhered in any way to the decking material. It is, however, ballasted, generally with gravel. The stones used in ballasted roofing are generally 1.5 – 2.5 inches in diameter and applied in a thicker layer. The stones are therefore much more substantial and hold up well under wind tunnel tests.

Ballasted systems are primarily used for large new construction projects, but can also be used on roof replacement or recovery projects where the existing structure can support the additional weight. Ballasted systems are traditionally the easiest of all systems to install and have earned the Underwriters Laboratories Class A rating.

In many cases, ballasted roofing also uses pavers in places of heavy traffic or even over the entire surface of the roof. In fact, the weight of the stone “ballast” is the only item holding the roof components in place. The weight can vary from 10 pounds per square foot (the minimum allowed by code) to 25 pounds or more.

Paver ballast can come in a several forms. Concrete and rubber pavers are two common choices. Concrete pavers are an attractive and functional choice for plaza decks, terraces or part of an integrated roof garden assembly.

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With ballasted plaza paver systems and a wide variety of vegetated roof garden options, not only can you create a cool roof that helps reduce energy usage, but you can also create an aesthetically pleasing, usable space on the rooftop. By combining river-washed stone ballast, concrete architectural pavers, interlocking rubber pavers and rooftop vegetation, a flat, non-usable surface can be transformed into a multifunctional plaza with numerous benefits, including:
  • Improved stormwater management
  • Increased air and water purification
  • Superior sound insulation
  • Energy efficiency
  • Beautiful, usable building space
  • Possible federal, state and local tax incentives
  • Significantly extended roof life
Because a ballasted system is loose-laid, with plate and fasteners installed here and there to prevent excess movement, the installation is extremely simple and quick. It also has the advantage of being able to be installed during almost any kind of weather and temperature conditions. Since there are no fasteners, and no need for heat or sticking materials, there is less clutter and no smell during installation. In addition, the stones or pavers and virtually fireproof, making this one of the most fire resistant roofing systems on the market.
Ballasted roofs are durable and long lasting. The roof tends to flex a little better under the expansion and contraction of heat and cold, making it a bit more durable. Stones or concrete pavers protect the waterproofing layer from UV rays, hail, and foot traffic. The loose-laid layers in a ballasted roofing system are easily taken up making for easy repair. And at the end of the roof’s designed lifespan, the lack of adhesives allows the roof to be totally recycled.

Ballasted EPDM

  • Ballast
  • Non-reinforced membrane
  • Acceptable Insulation
  • Approved Roof Deck
ballasted roof
Beautiful Wooden Modern House
Exterior Home
Explore Faq’s

Most Popular FAQ’s

What is a ballasted roof system?

A ballasted roof system involves placing loose roofing membranes over the roof deck and holding them in place with heavy materials like gravel, stones, or pavers. This method does not require adhesives or fasteners, making it a simpler installation approach for flat roofs, while also providing good wind resistance due to the weight of the ballast.

Can you coat a ballasted roof?

Yes, a ballasted roof can be coated, but it requires removing the ballast first to access the membrane. After applying the coating, the ballast is put back in place. Coating can enhance the waterproofing properties of the roof and extend its lifespan, but it is a more complex process due to the need to manage the ballast materials.

What is ballasted EPDM roofing?

Ballasted EPDM roofing is a type of installation where the EPDM rubber membrane is laid loosely over the roof deck and held in place using ballast, typically gravel or pavers. This system is popular for its cost-effectiveness and ease of installation. It provides good stability, weather resistance, and is often used on large, open commercial roofs.

What are the advantages of a ballasted roof?

Ballasted roofs offer several advantages, including easy and fast installation, cost-effectiveness, and reduced need for adhesives or fasteners. The ballast material provides excellent wind resistance and can protect the roofing membrane from UV radiation and physical damage, thereby extending the lifespan of the roof. It also adds thermal mass, which can help moderate temperature fluctuations.

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Rubber Roofing MN provides dependable, on-time, in-budget roofing services to commercial business owners across the state of MN.

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2522 Central Ave NE #207
Minneapolis, MN 55418
(651) 248-4651
(763) 242-2103