Any component of the roof assembly demonstrating an inherent weakness or inability to perform will diminish the roof system performance and service life expected. Steep slope roofs are watershedding types of roof coverings installed on slopes greater than 3. This means that in a horizontal line 12 feet across, your roof would have to rise between 2 feet to just under 4 feet vertically for it to be considered a low slope roof. Gutters on larger roofs usually lead water into the rainwater drainage system of any.
Roof slope, rise, run, definitions how are roof rise. If you set up your own roof maintenance file, you should prepare a roof plan using the following as a guide. These critical junctures account for the majority of roof leaks. Roof slope table table of roof rise, run, slope, types. Learn more about finding the angle of a line using our slope calculator. Architectural metal flashing, condensation control and reroofing 2010,ispublishedinjanuary2010. It remains unique the only working handbook that treats all topics in roof design, from fundamentals to roof systems. Lowslope roofing types integrity roofing and exteriors.
A roofing contractor can enhance the probability of success by administering assurance methods that can be followed by project managers foremen, superintendents, etc. This manual replaces all previous versions of the cedar shake and shingle bureau design and application manual for new roof construction. Low slope roofssometimes referred to as flatrange from 0 inches per foot up to 4 inches in a foot of run. For decades, this manual has been the most widely respected guide to designing and specifying lowslope roof systems. This article series gives clear examples just about every possible way to figure out any or all roof dimensions and measurements expressing the roof area, width, length, slope, rise, run, and unit rise in inches per foot. Low slope roofs or flat roofs, as theyre commonly referred to are more complex than steepslope roofs. This system is a series of multiple layers of asphaltimpregnated sheets of felt paper and hot asphalt. Low slope metal roofing materials sheet metal supply. Critical lowslope roofing details 20121212 building. Identification code a access hatch e expansion joint r roof vent v vent pipe. Common roof pitches and equivalent grade, degree, and radian angles. For example, their inability to shed rainwater promotes premature failure of the weathering membrane and its substrate.
Commercial, industrial and residential systems including singleply membranes, builtup roofs, modified bitumen, spray polyurethane foam, vegetative systems and roof coatings. When it rains, water has to go somewhere, and that is why drainage is so important. This standard is intended for use by those that design, specify, manufacturer, and test roofing. There are certain criteria that are required for the proper application of all low slope roof systems. Designers frequently select low slope roofs when the roof is expected to accommodate rooftop equipment. Dec 28, 2006 the successful construction of a low slope roof system requires adherence to proper application methods. Although apa spanrated panels used as roof sheathing at maximum span are adequate structurally. Tremco burmastic coldapplied builtup roofs and therm hotapplied builtup roof systems are designed for use on lowslope structures in north america. For architects, roof designers, roof consultants, contractors, spec writers, attorneys, materials manufacturers anyone who needs authoritative, up to date information on all aspects of roof technology the manual of low slope roof systems dominates the field. After youve bought this ebook, you can choose to download either the pdf. This program will create an exact copy of the pdf file. Failure to maintain product as required under the commercial roof systems specification manual. Glossary of low slope roofing terms lsg 3 updated august 2017 drainage layer.
This site is like a library, use search box in the widget to get ebook that you want. For architects, roof designers, roof consultants, contractors, spec writers, attorneys, materials manufacturers anyone who needs authoritative, uptodate information on all aspects of roof technology the manual of lowslope roof systems dominates the field. Residential low slope roofing can generally be divided up into two broad categories. West coast roofer roofing and roof repair 3,359,429 views. Manual of lowslope roof systems fourth edition roofing. Membrane roof systems2015 also is available in hard copy. This may improve the appearance of the building while resolving drainage problems as well. Low slope metal roofs have been a preferred roof covering for commercial, institutional and industrial buildings for years because of their ability to protect against the elements, to allow water to drain away from the roof surface, and to keep building contents and occupants dry and comfortable. Weatherproofing sturdiness reinforcement surface weatherproofing is especially critical in low slope assemblies because. Components that form part of the vegetated roof systems assembly providing unimpeded flow of water on the roofs surface to the roofs. Theseriesupdatewillbecompletewhenthefourthvolume,the nrca roofing manual. To read this ebook on a mobile device phone or tablet youll need to install one of these free apps. Employers need to plan ahead to get the job done safely employers need to develop a plan and ensure the proper equipment, material and appropriately trained workers are available. Try this free pdf to word converter online using any internetconnected device.
Conversely, some steepslope roof materials may be used on roofs with slopes less than 3. Each roof covered by the roofstar guarantee comes with a complete roof system record, which includes a roof plan and a copy of this maintenance guide. This tops anything i have seen in 25 years of roofing duration. The following information is intended to help avoid common roof problems and to help determine which type of roof to select in a new construction or reroofing project. A complete table of roof slope, riserun, walkability, angle or slope expressed as grade, and classification of roofs as flat, low slope, and steep slope. Thermoplastic polyolefin tpo singleply roofing membranes are among the fastest growing commercial roofing company products and have gained broad industry acceptance for their many performance and installation advantages. This is how to detail an unvented roof assembly for flat and low slope roofs. Borrow ebooks, audiobooks, and videos from thousands of public libraries worldwide.
Manual of low slope roof systems fourth edition roofing contractor. Let our experts help design a system that fits your needs. Drains on lowslope roofs are located at the low points of roofs, called valleys see picture. Deckseal roofing membranes deliver premium, durable system performance for many challenging low slope applications, such as additions, garages and porches. Guidelines for designing lowslope membrane roof systems. Home contact versico sds gaf low slope sds gaf liquid applied roofing sds gaf steep slope sds firestone roofing tamko sds sheets certainteed sds caulks and sealants generic steep slope. The app version and online pdf are the new primary delivery formats for the nrca roofing manual and jointly replace the nrca roofing manual cd, which has been discontinued. Jul 17, 2012 a roof that is nearly flat or slightly pitched is called a flat roof or low slope roof no roof should be dead flat because it must have at least a slight slope to drain. Owners must keep roof drains and the surrounding areas free of debris to. New ways of access for the first time, the nrca roofing manual.
Best practices for low slope roofs, steep roofs and. When considering reroofing a flat roof, it may be possible to convert the low slope roofing system to a steeply sloped roof. This means special care must be taken when selecting low slope roofing material, and during its installation. A roof that is nearly flat or slightly pitched is called a flat roof or low slope roof no roof should be dead flat because it must have at least a slight slope to drain.
Nrca defines low slope roof systems as a category of roofing that. Low slope roofing installation tutorial dan bolduc. For residential low slope owens corning has applied its 75 years of building science technology to introduce the deckseal selfadhered sa roofing system for residential low slope. For decades, this manual has been the most widely respected guide to designing and specifying low slope roof systems.
While generally written from the perspective of new construction, the information presented. Manual of low slope roof systems fourth edition building enclosure. This guide lists minimum performance attributes required of low slope roof assemblies. Manual of low slope roof systems download ebook pdf.
Most builtup roof systems are comprised of three layers of felt and asphalt. Steepslope roof systems2009 updates andrevisesthesteepsloperoofsystemssectionofthe nrca roofing. Low slope roofing topic roofing contractor magazine. In some instances, roof systems designed for lowslope applications may be used on roofs with a slope greater than 3. Es1 takes into account all the impor tant factors that go into a properly designed roof edge. This residential roofing guide is designed to be utilized as a guide when installing and caring for residential roofing systems. For decades, this manual has been the most widely respected guide to designing, constructing, and maintaining low slope. You just need to add the file which you intend to convert into the program and click convert. For decades, this manual has been the most widely respected guide to designing, constructing, and maintaining lowslope roofing systems. Membrane roof systems2015 is available on apple, android and windows tablets and for download from nrcas online bookstore, shop the app version and online pdf are the new primary delivery formats for the nrca roofing manual and jointly replace the nrca roofing manual cd, which has been discontinued. Griffin is a member of astm international and the american arbitration association. Download for offline reading, highlight, bookmark or take notes while you read manual of lowslope roof systems. Integrity is the local roof repair contractor that has all you need for a lowslope roof. Low slope roofs are often referred to as flat roofs.
The nrca roofing and waterproofing manual, fifth edition, contains. Generally speaking, a roof with a low slope is that which has a pitchmeasured as a ratio of height to widthless than 4. Problems at these points typically arise from improper application methods and the use of inappropriate or incompatible materials. Understanding how a building is insulated, ventilated, and how the drainage and flashing systems integrate is key to proper performance of a low slope system. Show changes in roof elevations in a separate sketch. Builtup, polymer modified bitumen, singleply, spray polyurethane foambased and structural metal panel roof systems fit this category. His books include energy conservation in buildings and the systems approach to school construction. Low slope roofs traditionally have been constructed with an asphalt builtup roof covering.
The premier guide to commercial and industrial roofs for decades, this manual has been the most widely respected guide to designing and specifying lowslope roof systems. How to install a deckseal low slope selfadhered roofing system. These free resources include bulletins, white papers, manuals and reports. It was developed in 1993 by adobe systems as a versatile extension for files with text blocks, tables, forms, pictures, etc. Design guidelines 0731 shingles 076119 manufactured roof panels metal 0752 modified bituminous roofing 0726 single ply roofing 075423 tpo a. Most roofing materials asphalt shingles, typical skylights, etc. Gaf lifetime roofing system, installing metal drip edge. Know the pitch of the roof and follow the appropriate standard. Low slope roofing products are those primarily intended for roofs with slopes of 3. Products purchased from third party sellers are not guaranteed by the publisher for quality, authenticity, or access to any online entitlements included with the product. Roof failure causes in depth and specific methods for avoiding them. This course identifies the information roofing contractors generally need from roof system designers to provide complete and building codecompliant low slope roof systems. Standard guide for low slope insulated roof membrane assembly.
For decades, this manual has been the most widely respected guide to designing, constructing, and maintaining low slope roofing systems. Low slope metal roofing materials include perimeter edge flashing, soffit panels, drainage, and es1 rated edge systems from sheet metal supply. This book is titled manual of lowslope roof systems by griffi and is nearly identical to the more currently released editions such as isbn 007145828x or isbn 9780071458283 or the 4th edition or any other more recent edition. Repair manual for low slope membrane roof systems on. Standing seam metal roofs can go down to 312, but anything below that means that means using some type of membrane, a soldered connection, or something that is 100 percent. Read manual of low slope roof systems fourth edition by richard fricklas available from rakuten kobo. Pdf to word convert pdf to doc, online converter for free. This article focuses on the lowslope reroofing section.
It remains unique the only working handbook that treats all topics in roof design, from fundamentals to roof systems and materials options. The manual of lowslope roof systems fourth edition. Low slope roofing includes water impermeable, or weatherproof, types of roof membranes installed on slopes less than or equal to 3. Nrca provides free access to the new manual to nrca member. Designers and specifiers should pay close attention to roofing details in these. With the exception of foam and metal, all low slope systems can be incorporated into protected membrane roof pmr designs. Manual of lowslope roof systems fourth edition building.
Low slope roofing installation instructions chapter 2a low slope roofing. The term replacement is used when the existing roofing system is to be. Roof system types roof systems and materials generally are divided into generic classifications. May 06, 2016 any roof with a slope under 412 is considered low slope.
Repair manual for lowslope membrane roof systems on. The roof system is defined as the roof membrane including surfacing and the roof insulation. This table lists all of the common roof slopes expressed as rise run, roof angle, roof slope, slope grade, and walkability. Please refer to wheeling corrugating company wcc warranties for specific details concerning warranty coverages, limitations, and obligations of the wcc manufactured products discussed in this guide. The most critical application points on lowslope roof systems are at flashings, penetrations and accessories.
Critical aspects of roof system designs are often left unaddressed, resulting in incomplete contract documents. A roof is considered to be low slope when the pitch of the roof is below 412 down to and including 212. Background nrca defines lowslope roof systems as a category of roofing that includes weatherproof types of roof systems installed. Free pdf to word converter from smartsoft is an excellent pdf converter, it will convert pdf to word easily. Click download or read online button to get manual of low slope roof systems book now. Flat and low slope roof retrofit by design, flat roofs with conventional membrane roofs have a host of problematic conditions. A lowslope roof is one that has a slope of less than 3in12. Tremco builtup roofs are formulated from select asphalt blends, polymer modi. The conversion of a pitched roof bungalow to a mansard provides a floor area on the upper floor that can be identical to the main floor area.
Typically, lowslope roof assemblies are composed of three interrelated components. Nrca roofing norton notch filter pdf anthology notes on excel 2007 pdf of drama shorter ed pdf and waterproofing manual 5th edition hardcover june, 2006. Key to potential roof top problems a ponded water b skylight c roof drain. He is a consulting engineer specializing in roofing and energy conservation and a former senior editor for mcgrawhills engineering newsrecord. Any roof with a slope under 412 is considered low slope. The ironridge flush mount systems prestamped certification applies to buildings with a roof slope of up to 45 degrees 12. Systems used with low slope roofing systems approved january 24, 2017 page 2 1.
As this manual outlines, there are many instances where a cool roof is not required, and the cec has been diligent in their requirements for cool roofing where it makes sense for property. In either case, find a professional roofing contractor experienced with lowslope roofs and these specific products. Additionally, low slope roofing systems more directly face the sun. Buy the hardcover book manual of lowslope roof systems. Bur is suitable for most lowslope roofing applications. A flat roof is a roof which is almost level in contrast to the many types of sloped roofs. Above roof deck, rigid insulation with a factorylaminated, nailable substrate can be used under malarkey roofing systems, but the use and installation of this product must be in strict compliance with the manufacturers requirements and recommendations.
Free shipping and pickup in store on eligible orders. Free 14day trial to any nook magazine or newspaper. The roof assembly is defined as the roof deck, along with the roof membrane and roof insulation. A guide to selecting the right low slope roofing materials. We give the required roof slopes for different types of roofing materials and we illustrate several methods by which the slope or pitch of a roof is easily measured. Roof systems generally fall under two distinct categories low slope and steep slope. Steep roof conversions are a viable option for relatively narrow buildings. When considering reroofing a flat roof, it may be possible to convert the lowslope roofing system to a steeply sloped roof. Lowslope roofs are often referred to as flat roofs. As in all construction work, paying attention to the little details can make all the difference between a longlasting, trouble free project and one that results in callbacks and early failure never a good option with a new england roof. This course identifies the information roofing contractors generally need from roof system designers to provide complete and building codecompliant lowslope roof systems. Metal roof installation manual metal roofing alliance.