Types of Flat Roof Construction

When selecting a flat roof in your constructing, you will discover a number of choices accessible, every with its strengths and weaknesses. Listed under are among the totally different choices: Constructed-up roofing, Modified bitumen, EPDM, and TPO. All of those supplies supply different functionalities and high quality. Find out about each on this article, then resolve which fits your constructing. Let’s get began!

Constructed-up roofing

Regardless of its comparatively quick lifespan, built-up flat roof construction St. Louis County, MO, is a sensible alternative. These roofs are usually sturdy, lasting so long as 20 or 40 years if put in appropriately. Though you must examine your roof for cracks and swimming pools of water yearly, you’ll hardly ever want to exchange it for a few years. Listed here are some advantages of built-up flat roof development. Learn on to be taught extra.

A built-up roof is likely one of the oldest types of roofing used within the U.S. for greater than 100 years. It’s usually referred to as “tar and gravel” roofs and consists of alternating layers of bitumen and reinforcing materials. A cross-section signifies the variety of plies; the bottom-most ply is the bottom sheet. As soon as utilized to a constructing’s roof deck and insulation, a built-up roof is taken into account totally adhered.

Modified bitumen

When you’re contemplating utilizing modified bitumen for flat roof development, you will have to know its advantages and set up strategies. Bitumen is a extremely waterproof, sticky, and viscous substance that is a significant element of asphalt. It’s extensively utilized in paving and development and has many different purposes. Consequently, modified bitumen is likely one of the most versatile development supplies accessible.

The important elements in selecting between TPO and Modified Bitumen roofing are the standard of the supplies used. Skilled roofing contractors know which suppliers to make use of and the best way to set up TPO correctly. As soon as you’ve got determined which kind of fabric is true in your constructing, you possibly can look into different elements, like the situation and the climate. These will enable you resolve which roofing materials will finest suit your wants. When you’re out there for a brand new flat roof, you will wish to contemplate TPO over Modified Bitumen.


EPDM is an artificial rubber membrane utilized in roughly 20 p.c of all low-slope roof installations in North America. EPDM is a extra widespread alternative in colder climates than in hotter ones, the place reflective white membranes are extra widespread. EPDM flat roofs will be difficult to keep up, and uncured or semi-cured materials can deteriorate rapidly. When putting in single-ply roofing techniques, infinite Roofing and Building makes use of a complete security plan. The security plan for single-ply EPDM roofing is in depth and identifies the potential for accidents earlier than any work begins.

Though EPDM flat roofs are fairly sturdy, it’s nonetheless potential for bubbles and blisters to happen. Whereas these points usually are not important to the integrity of an EPDM flat roof, they’ll hurt the aesthetic attraction of a constructing. Though bubbles needs to be left alone, blisters needs to be addressed if they seem on seams or the membrane itself. Additional, you shouldn’t apply a solvent-based asphalt compound to a skinny EPDM membrane.


TPO flat roof development is a comparatively easy course of, because it makes use of plastic materials that turns into pliable upon heating and hardening. After the highest membrane is utilized, a scorching air welder fuses the underside and high. A robotic welder produces a water-tight seam that’s roughly one-half inch extensive. Then again, a human welder can create a seam that’s two inches extensive.

Thermoplastic polyolefin, or TPO, is a polymer that comes with the perfect attributes of each EPDM and thermoplastic membranes. Thermoplastic polymer, or TPO, inherits the stable mechanical properties of EPDM, whereas the elastic rubber offers the flexibleness and weathering capability of PVC. These options make TPO an economical and environmentally pleasant roofing answer.


In comparison with different flat roof development supplies, felts have a brief lifespan, normally between 10 and 30 years. They’re straightforward to restore and keep, however it might require alternative if the roof shouldn’t be maintained appropriately. The excellent news is that almost all felt producers supply a guaranty of a minimum of ten years. Whereas a number of years is likely to be lengthy sufficient for a flat felt roof to perform appropriately, it’s value contemplating that excessive climate circumstances can severely harm your constructing.

Felt is probably the most conventional type of flat roof development. Felt sheets are manufactured in a manufacturing unit and are held down with asphalt cement or nails. Usually, felt roofs have a number of layers, very like RBM. Felt can be probably the most economical alternative, however it’s going to ultimately must be changed. Rubber-based supplies are extra sturdy however nonetheless are available in rolls. A mineralized cap sheet offers a pretty and maintenance-free end.

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