Flat Roofing from Adept Construction
At Adept Construction, we’re dedicated to offering our customers the best roofing services we can, including flat roof services. Flat roofs are typically used in arid climates, and offer the benefit of providing additional living or public space for the building on which they’re built. There are several types of flat roofs, and as for the material used to build them, there’s plenty to choose from depending on which options you need at your building.
Why Choose Flat Roof Installation
Many homeowners and businesses choose to install flat roofs on their homes or buildings because they offer more options for what to do with the space. Homeowners can grow rooftop gardens or entertain guests there, and restaurants can give their guests rooftop patio access. Additionally, flat roofs are durable, attractive choices for many types of buildings, allowing for a unique look compared to the traditional pitched roof.
Types of Flat Roofs and Materials Used
Three types of material combinations are the most commonly used for flat roof systems, though there are a variety of options to choose from. The most common three are:
· Built-Up Roof (BUR): Made of hot tar and gravel, these are built from three or more plies of waterproof material, alternated with tar and ballasted by a layer of smooth river stone.
· Modified Bitumen: Single ply rolled roofs with a mineral-based wear surface. As the material is unrolled, torch-down systems heat the adhesive. Newer systems, however, are peel-and-stick. Read more about bitumen roofing below.
· Rubber Membrane: EPDM, or ethylene diene monomer is a durable material that resembles an inntertube, yet is engineered to resist UV damage.
Green roofs, made of grass or turf are also possibilities for flat roofs, but they are far less common than other choices. More mainstream materials used for flat roof covering installation include:
· Turbo Seal (a gel-like membrane that doesn’t cure—it is installed on top of asphalt and capped with a sheet membrane)
· CSPE, a synthetic rubber commonly known as Hypalon
· Modified bitumen
· Cold-applied liquid membranes
· PVC membranes
· FTPO (flexible thermo polyolefin)
· TPO, which is being touted as a greener option
· Curon, a cold-curing glass-reinforced polymer composite
· Coal-tar pitch (often forbidden by building codes and not commonly used)
· GRP roof (fiberglass)
What to Expect When Installing a Flat Roof
Flat roofs have to put up with a lot of abuse from harsh weather, and thankfully, many of the materials used to build them are capable of doing as much. Flat roofs, despite their name, are not actually flat, though. They have a slight incline, at least one-eighth of an inch per foot of roof. When installed, the frame of the roof will be topped with plywood sheathing, then topped with underlayment.
Then, your roofers will bevel the corners, dry-fit the roofing, and glue down the roofing material (rubber or otherwise). Finally, roofers finish the edges. How long the project takes will depend on how large the roof is. For more information about flat roof construction and installation, contact Adept Construction today.
What is Modified Bitumen Roofing?
Modified Bitumen (MB) is asphalt that has had modifiers added to it to give it plastic or rubber-like properties. The most common types of modifiers being used are APP (Atactic Polypropylene) and SBS (Styrene Butadiene Styrene).
Modified Bitumen roof systems consist of one, two, or three ply systems. The type of substrate will often determine the type of system being installed. Modified membranes can also be installed in conjunction with built-up roof materials (such as multiple plies of fiberglass felt) to form a "hybrid" roof system. Modifieds have proven performance on residential, commercial, and industrial applications.
What Products Adept Construction Uses
Johns Manville has developed formulations that enhance the asphalt's overall weatherability by modifying premium-grade asphalts. By combining these modified asphalts with non-woven polyester or glass fiber reinforcements, JM produces waterproofing systems that exhibit tremendous strength, elasticity and weatherability.
APP membranes provide superior tensile strength while maintaining critical flexibility — even in the coldest environments. Additionally, with APP roofing membranes (coated with a proprietary blend of asphalt and atactic polypropylene), contractors now have an efficient mode of application by heat welding, making hot mopping unnecessary.