November 1st, 2010 at 6:00 pm
Cool Roofing
A cool roof is defined as a roof surface that has both high reflectivity and high emissivity. High reflectivity requires the surfacing material to reflect solar energy away from the surface. High emissivity requires radiating heat energy away from the surface. Roofs undergo significant expansion and contraction as they heat and cool throughout the day. Heat absorbed by the roof can also accelerate degradation by ultraviolet rays and water. A reflective roof can reduce the amount of thermal shock that occurs on the roof surface and make the roof last longer and possibly reduce energy bills through less use of HVAC.
CRRC
The Cool Roof Rating Council (CRRC) is an independent, non-profit organization that maintains a third-party rating system for thermal emittance properties of roof surfacing materials. Created in 1998 to develop accurate and credible methods for evaluating and labeling the solar reflectance and thermal emittance (radiative properties) of roofing products and to disseminate the information to all interested parties.
Elongation
The ability of a membrane or coating to be stretched and lengthened by force to accommodate movement. Roofing membranes have forces exerted on them from the building movement and the membrane must be able to accommodate these movements. If a 100 foot building expands by 3%, the walls would need to move 3 feet. This would increase the stresses on the building to the point of structural failure. The United States Army Corp of Engineers estimates that buildings move less than 1%.
sources: The Garland Company, Inc.®
Tags:
Cool Roofing,
elongation
November 1st, 2010 at 5:47 pm
Architectural
Architectural
A steep slope system that is used for visual impact or aesthetics and typically requires a supporting deck with a minimum slope of 3:12. Architectural panels usually have low seam heights of 1 inch to 1-1/2″ inches and do not use sealant between seams. Due to the low seam height and no sealant in the seams, architectural panels shed water but are not watertight and therefore require an underlayment below the panels to create a watertight system.
Asymmetrical Panel
Asymmetrical panels have one leg of the standing seam panel different from the other so that these legs in adjacent panels may be joined without the use of a seam cap. These asymmetrical legs usually “snap” together in a male/female connection. Examples of Garland asymmetrical panels are R-Mer Loc and R-Mer Clad.
BUR
The built-up roof is a multi-layer roof system that consist of multiple plies of reinforcements laid in a waterproofing bitumen. The alternating plies of reinforcement and waterproofing bitumen provide redundancy to the roof system. The reinforcements on a BUR are typically fiberglass felts, which provide strength to the BUR. The waterproofing bitumen can be asphalt or coal tar. The BUR is surfaced with gravel or a fluid applied coating.
source: The Garland Company, Inc.®
Tags:
asymmetrical panel,
built up roof,
BUR
October 29th, 2010 at 6:13 pm
Roof Coatings
Roof coatings can be used to restore metal, asphalt built up, modified bitumen, polyurethane foam, single ply ( EPDM, TPO, PVC ).
Sixty percent of all roofs in the United States are replaced prematurely because of leaks.
- Roof Coatings will help prevent roof leaks, while extending the life of your roof. Most coating manufacturers offer 5 or 10 year system warranties on coating Installations.
Roof coatings are popular alternative because it more cost effective than a retrofit. Additionally, compared to a retrofit which essentially adds another layer of roofing material, Roof coatings create a chemical bond to the current roofing substrate essentially ‘bulking up’ the existing system.
A roof coating job can pay for itself through reduced energy bills in summer.
Americans spend about $40 billion annually to air condition buildings – sixth of all electricity generated in this country. Coatings reflect 85-90% of heat and ultraviolet rays from the sun- reducing your air conditioning cost by up to 20-30%.
Tags:
commercial roof coatings,
roof coating,
roof leaks
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October 25th, 2010 at 4:01 pm
The National Roofing Contractors Association (NRCA) was established in 1886. NRCA is one of the construction industry’s oldest and most respected trade associations and the voice of professional roofing contractors worldwide. NRCA offers extensive roofing industry information for roofing professionals, including technical information, Special Reports, insurance and safety information, an industry calendar and the latest industry news. NRCA provides a wide range of information and services to help homeowners and building owners make informed decisions about replacing and maintaining their roof systems
NRCA Roofing Manuuals
The goal of NRCA’s roofing manuals has always been to provide best industry practices and technical information concerning the design, materials and installation of roof systems. They present time-tested, best-practice guidelines for roofing buildings and other enclosed structures that have been collected by NRCA from knowledgeable, practicing roofing contractors located throughout the U.S.
NRCA published its first manual, A Manual of Roofing Practice, in 1970. This was NRCA’s first reference guide developed by roofing contractors to address good roofing practices. This manual subsequently was revised in 1971, 1973 and 1976. In its original and revised editions, A Manual of Roofing Practice primarily addressed roofing practices relating to built-up membrane roof systems. sources: http://www.nrca.net/
=> Whitco Roofing NRCA Member
The Cobb Chamber of Commerce represents Cobb County’s diverse, dynamic business community. The largest county-based chamber in the state, the Cobb Chamber provides members diverse business opportunities to positively impact their bottom line. Being a member of the Cobb Chamber means investing in the future of your business and community. The Cobb Chamber’s mission is to strengthen the economy, promote the community, build solid relationships and promote quality service. sources: http://www.cobbchamber.org/
=> Contractors – Roofers – Cobb Chamber of Commerce Whitco Roofing, Inc.
Tags:
cobb county chamber,
nrca,
Whitco Roofing
