Roof Types with Definitions

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EPDM Roofing Basics

Short for Ethylene Propylene Diene Monomer, EPDM roofing can also be referred to as rubber roofing. A single ply-membrane is what an EPDM roof is, meaning that there is a single layer of roofing material. The thickness of EPDM ranges from thirty mils to 100 mils, the most common thickness however is between forty five or sixty mils.

EPDM roofing is relatively inexpensive, and since the 1960´s it has been common in the U.S., when it comes to flat or low-slope roofs, it is the most one of the roofing materials that is most frequently used. EPDM roofing is a, slow very versatile and durable, and typically it is considered easy to install as well as maintain and repair more than other kinds of materials for roofing. When considering roof installations for your home or company, rubber roofing is an inexpensive option.

EPDM Membrane Roof Installation and Repair

When it comes to EPDM membrane roof installation, there are three standard procedures. The first one is fully-adhered membrane, this uses adhesives that are water or solvent-based to adhere the membrane to the base of the roof. Secondly, there is membrane that is mechanically-fastened, this is attached to the roof base by mechanical means. Finally, there is membrane which is loose-laid, for installation of this option the membrane must only be secured to the roof at any point of penetration or at the perimeters. Both quick and efficient installation and repair is ensured by A. C. Roof Repair EPDM roofing accompanied with superb quality.

Advantages Over Asphalt Flat Roofing Systems

There are distinct advantages shown through the application of membrane roofing over the flat roofing method of gravel and asphalt that was previously more common. With application of asphalt and gravel, creating a proper seal at every connection point and at all seams can be very difficult. This can be the cause of many leaking roofs early on its lifespan, it may even require a lot more maintenance.

When properly installed, newer materials either have seams that are as strong as the body, or are seamless. This eliminates most of the concerns of leakage associated with roofing systems that are flat. Repairs for roofs that are asphalt and gravel can be very difficult, mainly because of how hard it is to locate the precise point of a leak. It is relatively easy to patch newer systems, and it is easier to locate breaks and leaks.

Asphalt roofing originally required for two reasons a layer of gravel above. For starters, asphalt degrades much faster when directly exposed to the sun, mainly because of the expansion and contraction which occurs throughout the day, as well as due to the damage UV rays cause. Secondly, asphalt requires weight above to hold it down, being as it sits on top of a building, as opposed to being attached to it. Every one of the three newer kinds of roofing systems contain expansion and contraction resistant materials, and they also reflect much of the UV rays.

Also, due to these membranes lacking either seams of having strong seams, the expansion and contraction which does occur will not create breaks and least at these seams. These roofing systems that are newer are also attached right to the top of the building, this eliminates any excess weight above.

Modified Bitumen

Asphalt adhered, heat-welded or installed with adhesive. Polymers such as SBS or APP are mixed with the asphalt, then placed on a mat of fiberglass and/or polyester, the seams are sealed by melting the asphalt locally with heat, adhesive, or mopping of hot asphalt. Will work well with most applications.

Built-Up Roof

Multiple plies of fiberglass felts that are coated or felt that are organic and salt-saturated. With the use of coal tar pitch, hot asphalt or adhesive, plies of felt are adhered. Although it is possible to leave the roof membrane bare, typically it is covered with a thick coat of material that is water-proofing and covered with gravel. Protection from the ultraviolet degradation is provided by gravel, it also stabilizes the temperature changes, increases the weight of the roof system so that it resists wind bow-off and protects the surface of the roof.

Roof Coating

Roof coating is a fully adhered, monolithic, roofing membrane that is fluid applied. It contains elastic properties which allow it to stretch and then return to its original shape without causing damage. Roof coating dry film typically varies in thickness from plus to minus three dry mils which is paint film thickness, to over forty dry mils.

What this means is that a roof coating becomes the actual underlying system and top layer of composite. As such, the top most layer of the membrane´s protection is the roof coating, meaning it will receive the impact of both infrared and UV (ultraviolet) sunlight, rain, hail as well as physical damage.

Benefits of Roof Coating

Roof coatings are seamless and when properly installed, they are able to solve roof leaks on. nearly any kind of roof substrate. Reflective, field-applied roof coating can extend nearly every roof substrate´s useful life keeping the surface of the roof cool as well as providing a certain amount of protection from the sun and weather. The director of technical services at the NRCA (National Roofing Contractors Association) has approved roof coatings in every state of the U.S.

Twenty five years of service life can be added to a roof with roof coatings reducing that amount of roofing materials that are discarded and end up in landfills. On the right, the infrared image displays “175°F” on the black section which is uncoated, of the modified bitumen roof. The coated section which is white is “79°F. What field studies have found that cool roof coatings are able to lower the temperatures of rooftops as well as reduce air conditioning bills.

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