Iko built up roofing bur systems are composed of layers of roofing asphalt and asphalt felts which are installed so that the multiple interwoven plies form a roofing membrane. We were too remove the existing roofing systems down to the existing decking and install a. Anything which produces a crack or puncture in the waterproofing membrane can quite readily lead to leaks. Builtup roofs are really dependable and operate wonderful for numerous reasons, nonetheless, they do have some disadvantages. Formerly, the built up roof membrane was the waterproofing agent and the bitumen was the adhesive. Builtup roofing systems, also known as bur, are considered one of oldest and most reliable roofing systems for commercial properties that have a low sloping or flat structure. Burmastic builtup roofs are available in multiple configurations, each offering such features as the extra strength, redundant protection and longterm performance of a multiply system. Bur roofing systems are composed of three elements. A surfacing is generally applied and can be asphalt, aggregate gravel or slag, emulsion or a granulesurfaced cap sheet. Builtup roofing application guide two section 22 rs4927 214 replaces 11 asphaltapplied and cold application builtup roofing application guide 3.
Dec 08, 2019 although built up roofs are durable, leaks can develop. Built up roofing lnspection and repair by martin a. Typically, a built up roof will need routine maintenance and recoating every 46 years. It must protect the structure itself and provide for the comfort of the building occupants or the protection of valuable property, while exposed to a.
Built up roofing application guide two section 22 rs4927 214 replaces 11 asphaltapplied and cold application built up roofing application guide 3. Aug 28, 2012 this is a short video on a built up, roof system hot mop installed by final touch roofing, california. Im halfway though sheeting the roof of my shipping container shop, and already need to redo some of it. Our cost guide has been updated for 2020 to reflect current fair wages and material option costs for built up roofing. Because the builtup roof membrane is field assembled, field quality control is. The granddaddy of membrane roofing is builtup bituminous roofing bur. In some instances, the adhesion of the gravel or slag of builtup roofs makes it virtually impossible to remove suffi cient quantities of the old ballast. This helps ensure the roof towards probable leaking from entering the house although creating a stable platform for any solar panels or roof gardens installed on the roof. Expect the built up roof prices to fluctuate between various companies each and every company have different operation expenses and overhead.
Our crews are highly trained, efficient, courteous and will provide professional workmanship. Iko builtup roofing bur systems are composed of layers of roofing asphalt and asphalt felts which are installed so that the multiple interwoven plies form a roofing membrane. Built up roofing is basically a flat roofing technique, and was the most popular form of roofing for flat roofs, until the single ply roofing technique was. With increased interest in sustainability and green buildings, its. A builtup roof, most of the time referred to as bur, is a timetested roofing system typically comprised of hot tar and gravel. The gravel and tar builtup roof is the one most commonly known.
The application of the asphalt primer is important because older builtup roof systems may be brittle or lack the oils present in a newer roof system. They may also develop where wind has blown the gravel away and exposed the surface to sun, heat, and cold. The built up roof technique is used for any roof that cannot be shingled because the pitch is too low. Layers of one or two different types of roof felts held together with a bonding agent called asphalt or coal tar pitch. Roof covering is probably the most important element in a building. The gravel might need to be pushed out of the way if the proper amount is on the roof. Roll out perforated base sheet dry, granulesurface down, directly over the asphalt primed existing smooth built up roof. Bur continues to hold a modest place in the market certainly not what it was in the 1970s and 1980s, but still significant. Although builtup roofs are durable, leaks can develop. To keep builtup roofs in good shape, be sure that there are no bare patches in the gravel. The cost of a builtup roofing system is minimal when compared to the lifecycle and durability of the system. Watch this before sheeting your roof with osb avoid. Replacing a roof rand engineering architecture, dpc.
Builtup roof material can consist of bitumensaturated felt, coated felt, polyester felt or other fabrics. Burmastic built up roofs are available in multiple configurations, each offering such features as the extra strength, redundant protection and longterm performance of a multiply system. Built up roof membranes, referred to by the acronym bur, have been in use in the u. On nailable decks such as wood, oriented strand board osb, plywood. Lap the base sheet 2 inches 51 mm and 4 inches 102 mm on the ends, with adjacent laps a minimum of 18 inches 457 mm apart. Builtup roofing is one of the oldest and most reliable ways of installing a new roof.
White acrylic based protective and reflective roof coating for asphalt builtup and modified. Modified bitumen mb roofing is an asphaltbased, close cousin of the builtuproof bur designed for buildings with lowslope or flat roof structures. To protect the roof from damaging ultraviolet rays, which cause it to dry, shrink, and eventually crack, the roof surfacing is usually treated in several ways. Built up roof cost guide 2020 built up roof typical options. Built up roof cost guide 2020 built up roof typical. A typical builtup roof configuration consists of four layers of asphalt and three layers of felt. Gaf founded in 1886, gaf is the largest roofing manufacturer in north america. If you live in an arid region or an older urban area, you may have a large flat roof. The modified bitumen is a cap sheet for a built up roof that is used in lieu of gravel, although it works well by itself on a sloped roof with positive drainage or no standing water. Built up roof vegetativegreen garden roof employee portal folder. The first step in repairing your builtup asphalt roof system is to clean the surface of the roof.
The formula for a quality built up roof is more or less the same as it was over 100 years ago. Roof repair, replacement, storm damage rio hondo roofing. Jan 26, 2004 this detail is of extreme importance in colder climates like the north and midwest where this type of split is more prevalent. Keeping the roof surface covered with gravel will also keep your house cooler in the summer and warmer in the winter. Timber framed and historic buildings may be framed with principal rafters or timber roof trusses. The asphalt provides the waterproofing capabilities while the felt reinforces the asphalt.
A builtup roof membrane surfaced with a layer of hotmopped asphalt, coldapplied asphalt clay emulsion, coldapplied, asphalt cutback, or sometimes with an unmopped inorganic felt. By applying a primer to the surface of the roof, the patch can then bind itself to the roof surface, increasing the longterm performance of the patch. Cost of built up roof calculate average prices by zip code. Mbbur 02 tapered edge flashing detail pdf doc type. This is by far the oldest of the modern methods of roofing dating back to the early 1800s.
Mbbur 03 wall flashing detail for supported deck dwg doc type. Asphaltapplied and cold application builtup roofing. Built up roof is a generic term for a roof system that is literally built by adding layers. Many of the remarks in this section pertain to bituminous builtup roofs. Gacoflex gacopatch is a flashing grade, standalone silicone roof patch designed to be installed in a single application without reinforcement on a variety of substrates. With increased interest in sustainability and green buildings, its only fair to look at the issues and see where bur stands. Some flat roofs have hot tar builtup roofing, which may have a gravel surface. The typical surface for builtup roof systems consists of gravel with a heavy application of asphalt or cold tar. Thanks especially to the addition of polymers that add stretch and strength, you can now apply your roof any way. Roofs are the part of a building that are most exposed to intense elements. With no kettles or disagreeable odor, the burmastic system is ideal for restoration projects on buildings that must remain occupied during a roofing. A built up roof, most of the time referred to as bur, is a timetested roofing system typically comprised of hot tar and gravel.
Bur is preferred for lowslope, or flat, roofs because it creates a continuous sealed surface. The upper roof area was a built up modified roofing system that was installed over a tectum deck while the low section was a built up modified roofing system installed over a plywood deck. Trusses are prefabricated, triangulated wooden structures used to support the roof. When the bituminous coating on a mineralsurfaced builtup roof is exposed, as shown in figure 710, brush loose gravel or slag from the bare area. Get at least 35 estimates before hiring a built up roof contractor estimates are typically free, unless its a service call for a repair. Benassi, aia as a building owner or manager, you are wel i aware of the reasons for maintaining a watertight roof on your structure. Count on iko for the best in built up roofing systems. Builtup roofing types, advantages, and applications. The use of buildup roofing in new, reroofing and recover applications in both conventional and protected membrane assemblies will be also. Builtup roofing has been used for more than 100 years and is extremely durable. New asphaltic built up roofs have a unique problem in that if they leak the roofer was probably a bad roofer. Laying asphalt roof shingles guide for professionals arma.
Bur systems generally are composed of alternating layers of bitumen and reinforcing fabrics that create a finished membrane. Gaf manufactures and supplies a complete line of products for the asphaltic roofing systems most commonly used in commercial applications. Built up roof pricing and installation cost checklist. Conventional built up roofing bur, modified bitumen roofing, gaf composite roof systems that combine select bur and modified bitumen materials into a multiply composite construction and single ply roofing. Cold applied built up roofing systems burmastic built up roofing systems when you need the durability and exceptional waterproofing capability of a multiply builtup roof but using a system with hot materials is not the right choice, tremco roofings burmastic cold applied builtup roof system is the way to go. The nrca has a section and details for this type of roofing in the nrca. Built up roofing is one of the oldest and most reliable ways of installing a new roof.
Input project size, product quality and labor type to get built up roof material pricing and installation cost estimates. Flashing problems account for the majority of roof leaks on lowslope builtup roof systems. Advantages and disadvantages of builtup roofing methods. Roofs are also designated as warm or cold roof depending on how they are designed and built with regard to thermal building insulation and ventilation. A typical built up roof configuration consists of four layers of asphalt and three layers of felt. Tie ins to existing membrane are especially critical when patches are. Download cad, specs, 3d, bim and green product information. Typically, a builtup roof will need routine maintenance and recoating every 46 years. The building code identifies the lowest pitched roof where shingles are allowed. Sopra iv is composed of a proprietary formulation of bitumen and is reinforced with a high quality random glass fiber.
It is composed of alternating layers of reinforcing fabric and bitumen asphalt and is finished with a top layer of aggregate, such as stone or gravel. Proper flashing design is the responsibility of the roof designer. It must protect the structure itself and provide for the comfort of the building occupants or the protection of valuable property, while exposed to a wide variety of climatic conditions. The upper roof area was a builtup modified roofing system that was installed over a tectum deck while the low section was a builtup modified roofing system installed over a plywood deck. They will repair, replace or build your roof in a safe and conscientious manner. Repair programs can then be conducted in the best weather, with capital allocated. With the location of the leak determined the surface needs to be cleaned down to the roof and not the gravel that you thought was the roof. Information minimum standards for renewal of roof covering 123. Builtup roofing, also called bur, is the most common roofing material used on lowslope roofs. It is made up of many layers and typically the top layer is where the tar and gravel lie. Mbbur 02 tapered edge flashing detail dwg doc type. The number of plies in a cross section is the number of plies on a roof. We were too remove the existing roofing systems down to the existing decking and install a built up soprema roofing system.
Roof surfacings on flood coat and aggregate roof surfacing, hot bitumen is poured onto the roof membrane at a rate of approximately 0. Architects, builders, contractors, roof consultants, and building ownermanagers, all stand to benefit enormously from the fact that manufacturers across north america are making asphalt better and more versatile than ever before. This is used on flat roof surfaces of plywood, oriented strand board osb, cured concrete, or dens deck roof board. Also keep in mind that the temperature and humidity affect the curing time. Plywood and oriented strand board are occasionally used if required for. Where the roofing curves to meet a wall or chimney, the material may loosen along its topmost edges. Gacoflex gacopatch august 2019 gacoflex gacopatch silicone roof patch description.
Bur offers the added protection of redundant multiple layers, performs well in extremes of heat, cold, wind, and snow, is easy to repair, and has a proven track record. The term four plies denotes a fourply roof membrane construction. Sometimes a base sheet, used as the bottom most ply, is mechanically fastened. Built up roof material can consist of bitumensaturated felt, coated felt, polyester felt or other fabrics.
This is a short video on a built up, roof system hot mop installed by final touch roofing, california. Builtup roofs should be checked at least once a year for developing issues. Count on iko for the best in builtup roofing systems. Builtup roofing system hot mop roofing system multi. Some flat roofs have hot tar built up roofing, which may have a gravel surface. Flashing design for builtup roofs roofing contractor. This detail is of extreme importance in colder climates like the north and midwest where this type of split is more prevalent. Built up roofing systems, also known as bur, are considered one of oldest and most reliable roofing systems for commercial properties that have a low sloping or flat structure. Sopra iv is a bitumencoated base sheet for use in built up roof assemblies. This is a system that has been around and in demand for ages. The builtup roof is generally a flat roof, or a low pitched roof, which is made of a number of levels.
Because of that dont expect any bells, whistles, or lace trim with these roofs. Best cad detail collections are available to purchase and download spend more time designing, and less time drawing. Gaf commercial roofing products builtup asphalt roofing. Cover the bare area with hot bitumen poured at a rate of 70 pounds per square, and embed fresh gravel or slag. Engineered modified bitumen roofing membranes originated in europe in the mid 1960s and have been used successfully in the united states and canada since approximately 1975. Get an instant, vendorneutral estimate of built up roof options and costs in your zip code. When the bituminous coating on a mineralsurfaced built up roof is exposed, as shown in figure 710, brush loose gravel or slag from the bare area. Built up roof definition what does built up roof mean in. For those who know the roof above is critical to protecting the business below, the choice is clear. Benassi, aia as a building owner or manager, you are wel i aware of the reasons for main taining a watertight roof on your struc ture. Free, online built up roof cost guide breaks down fair prices in your area.
Modern timber roofs are mostly framed with pairs of common rafters or prefabricated wooden trusses fastened together with truss connector plates. Certain burmastic plies and adhesives even contain recycled content, making our. Almost of homes built today use roof trusses for their roofing support. It may be covered with a granular roll roofing, epdm which is smooth surfaced, or modified bitumen which may be smooth or mineral surfaced. Get 2020 built up roof price options and installation cost ranges. Furnish and install builtup asphalt roofing system where shown on the drawings, as specified herein, and as needed for a complete and proper installation. Longlasting, resilient trumbull builtup roofing asphalt products. A continuous, semiflexible roof membrane assembly, consisting of plies of saturated felts, coated felts, fabrics or mats between which alternate layers of bitumen are applied, generally surface with mineral aggregate, bituminous materials, or a granulesurfaced roofing sheet. Leaks related to the waterproofing of difficult details, joints and connections or.