Quick Answer to "What is Flat Roofing?":

Flat roofing refers to roofs with a very slight incline, constructed using materials that provide a continuous waterproof membrane over a portion or the entire building.

New Flat TPO Roof for Commercial Building in Tukwila, Washington - view of new roof and front of commercial building from an angle
This is a Three Tree Roofing commercial roofing project in Tukwila, Washington we upgraded from an old torch-down roof to a new TPO Membrane Flat Roof.

Extended Answer to "What is Flat Roofing?":

What is Flat Roofing? - Popular in urban environments.

Also known as membrane roofing or low-slope roofing, flat roofing systems are designed to cover the top of a building in a way that is almost level, yet sufficiently sloped to allow water to drain off. This type of roofing is popular for its practicality in urban environments, ease of installation, and the additional usable space it provides. As popular as flat roofing is on commercial buildings, flat roofing is sometimes used on residential homes.

The materials used in flat roofing vary, including options like EPDM (rubber), PVC (polyvinyl chloride), TPO (thermoplastic olefin), and modified bitumen. These materials are chosen for their durability, waterproofing qualities, and ease of maintenance.

This shingle and flat roof design includes a flat roof nestled within a striking composition roof surrounding the inner TPO roof, forming a layered roofing system that combines asphalt's durability with TPO's benefits.

Types of Flat Roofing Materials and Construction

  • EPDM (Rubber): A durable synthetic rubber roofing membrane known for its long lifespan and resistance to weathering.
  • PVC: A type of single-ply roofing that is highly resistant to water, fire, and chemicals.
  • TPO: A reflective roofing membrane known for its heat resistance and energy efficiency.
  • Modified Bitumen: A modern take on built-up roofing that adds layers of bitumen interspersed with reinforcing fabrics.

Benefits of Flat Roofing

Flat Roofing Benefits: Energy Efficiency
Energy Efficiency: Many flat roofing materials are designed to reflect more sunlight, reducing the need for cooling during hot months.
Flat Roofing Benefits: Space Utilization
Space Utilization: The flat surface can be used for green roofs, solar panels, or even as additional outdoor living space.
Flat Roofing Benefits: Cost-Effectiveness
Cost-Effectiveness: Generally, flat roofs are less expensive to install and maintain than traditional sloped roofs.
Flat Roofing Benefits: Versatility
Versatility: Flat roofs can be installed on a variety of building types and sizes, making them a flexible option for many projects.

Three Tree Roofing Staff are Flat Roofing Experts

Three Tree Roofing includes a 25 year workmanship warranty on all flat roof installations. We have dedicated flat roofing crews that install flat roofs and no other types of roofing. This allows our flat roofing crews to focus on flat roofing and be the best flat roofers in Washington state.