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There are two types of roofs: flat and pitched (sloped). Most commercial buildings have flat or slightly sloping roofs. Some roofers work on both types; others specialize. Most flat roofs are covered with several layers of stuff. Roofers first put a layer of insulation on the roof deck.

Next, they install partially overlapping layers of roofing felt, a fabric saturated in bitumen. Roofers use a mop to spread hot bitumen over the surface and under the next layer. Roofers repeat these steps to create the desired variety of layers, called plies.





A growing number of flat roofs are covered with a membrane of waterproof rubber or thermoplastic compounds. Roofers roll these sheets over the roof's insulation and seal the seams. Adhesive mechanical fasteners, or stone ballast hold the sheets in place. The building has to be of sufficient power to maintain the ballast.

To apply shingles, roofers first lay, cut, and sew 3-foot bits of roofing felt lengthwise over the entire roof.

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Finally, roofers cover exposed nailheads with roofing cement or caulking to prevent water leakage. Follow a similar process. Many roofers also damp-proof and water-proof concrete and masonry walls and flooring. To prepare surfaces for waterproofing, they hammer and chisel away rough spots, or eliminate them with a rubbing brick, before applying a coat of liquid waterproofing compound.

When damp-proofing, they usually spray a bitumen-based coating on interior or exterior surfaces. Quite a few roofing materials are available... Asphalt Asphalt is the most widely used roofing material. Asphalt products contain roll-roofing roof shingles, and modified bitumen membranes. Asphalt shingles are usually the option for residential pipes.

There are four unique types: laminated, strip, laminated, and large individual shingles. Shingles consist to give additional thickness. Interlocking shingles are used to provide increased wind resistance. And individual shingles normally come in rectangular and hexagonal shapes. Goods are used in programs for flashings and underlayments.



Is used alone covering for small buildings. Products are used as flashing to seal the roofing at protrusions and intersections, and for supplying extra deck security at the eaves and valleys of the roof. Saturated felt is used as an underlayment between the roof deck and the roofing material.

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Built-up roof (or BUR) is the most popular selection of roofing used on commercial, industrial and institutional buildings. BUR is used on low-sloped and flat roofs also consists of numerous layers of bitumen and metal roof paint ply sheets. Constituents of a BUR method comprise material, a vapor retarder, insulation, membrane, and the roof deck.

Factory surfacing, when implemented, includes aluminum, slag , mineral granules or copper. The bitumen offers security security that is primary and decides the physical characteristics of the membrane, whereas the reinforcement adds power, puncture-resistance and overall system integrity. Even though some contain aluminum and other metals, metal Most metal roof shingle repair cost roofing products contain aluminum or steel.

Metal roofing can be obtained as seam and battentiles, shingles and shakes. Products also come in many different colours and styles. Steel roofs with solid sheathing control sound from rain, hail and bad weather as well as any other roofing material. Metal roofing may also help remove ice damming at the eaves.



It normally lasts two to 3 times more than asphalt and wood shingles, although metal roof prices more than asphalt. Wood Wood shakes offer a natural look with a great deal of character. Due to variations in color, thickness, width, and cut of the wood, no 2 shake roofs will ever look the same.

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It can help to insulate the loft, and common roof leaks it allows the house to breathe, circulating air through the tiny openings beneath the rows on which wooden shingles are laid. A wood shake roofing, however, demands repair and maintenance, also it will not survive as long as some other products. Pests, rot and Mildew can become an issue.

Wood shakes are unrated by flame security codes. Many use spray-on or wipe fire retardants , which provide security and are effective for a few decades. Some pressure-treated shakes and federal fire protection criteria are impregnated with fire retardant and meet. Wood shakes that are installing is more complex than roof with shingles, and the grade of the roof is dependent upon the grade of these shakes utilized, in addition to the contractor's expertise.