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How To Install Rolled Roofing On A Flat Roof

Sean Levine  |  February 19, 2022  |   |  No Comments

There are various reasons why people opt for rolled roofing, but perhaps the most significant one is its affordability. Rolled roofing is affordable and easy to install. Consider roll roofing for a practical alternative when aesthetics isn't as crucial. It's built of materials comparable to composition shingles but isn't as tough.

Roll roofing is frequently put over bare wood sheathing or primer-coated wood sheathing. The sheathing will be sufficiently protected against water and leaks if roofing felt is applied first.

You can utilize the exposed-nail technique if the roof is sloped. Employ the concealed-nail approach for a barely sloped roof. Utilize double coverage on a flat or almost flat roof, while a torch-down modified bitumen or EPDM roof is a superior option.

Anticipate using half a day installing flashings and roll roofing for a 700-SF roof with minor issues, with the assistance of a companion. Remove the former shingles from the roof or prepare for a reroof by ripping them off.

Step By Step Procedure On How To Install Rolled Roofing On A Flat Roof 

  1. Lay out the equipment

If necessary, install drip-edge flashings, roofing felt, and WSU. Although metal valley flashing can be installed, it is more customary to apply an eighteen-inch-wide strip of roll roofing merely. Place it on a layer of roofing cement, even any crinkles, and attach it to the edge.

  1. Affix the first course

Place the first course about 1/4 inch overhanging the drip edges and lay it out a latitude of eight feet or thereabout. At an edge of the rake, punch nails every three inches, draw it taut, and punch nails along the eave end. Nails should be able to be one inch away from the edges. Put in one three-foot-wide strip on top of the eighteen-inch for more safety.

  1. Affix the second sheet

The following sheet overlays the previous by four inches or, in the case of some kinds of roll roofing, by sufficient to coat the bare mineral surfacing region. Snap a chalk line to indicate the top of the following sheet, lay it out along the row, then nail it in place much like the first.

  1. Layout Roofing Cement

Make sure that no two butt joints are more than two feet apart. Apply a six-inch-wide coating of roofing cement along the first sheet's edge, then press the subsequent sheet into the cement.

  1. Seal Vents

OverSpread roofing cement around a plumbing vent to seal it. Cut a 2-foot-wide hole in a piece of roofing and slide it over the pipe. The piece should be at least four inches longer than the lower course. Chop a hole in the roll roofing and cover it with it. Cement two roofing sections together. Put in a boot flashing for extra security.

  1. Extend over The Valley

Work two feet over the center of a valley from one angle roof. Working from the opposite side, overlay the valley, draw a chalk line, and cut off the piece at the valley's center. Keep nails at the minimum of twelve inches from the valley's center; for anything nearer than twelve inches, utilize a four-inch-wide bed of roofing cement.

  1. Place the final piece in place.

In most situations, you may barely overlay the sheets at the ridge and finish with roofing cement and nails. Coat the peak with a sixteen-inch-wide strip sunk in cement if the last portion does not come down at least eight inches past the apex.

  1. Modify for a slanted roof if desired.

If you have a slanted roof, chop nine-inch-wide roofing pieces, position them flush with the drip edges with the eave and rake, and secure them with two lines of three-inch-apart nails. Spread out roofing cement across half or more of the pieces with a trowel.

Afterward, in the cement, place the first course so that it overhangs by approximately 1/4 inch. Since the roofing is difficult to reposition, place and lay it out conscientiously before pressing it into the cement. Only the top edge should be nailed (the portion bare of mineral coating). Add a four- to a six-inch-wide coating of roofing cement to the leading edge, then repeat with the subsequent courses.

Various Types Of Rolled Roofing Depending On The Materials 

  1. Ordinary Rubber Rolled Roofing

Among all rolled roofing materials, rubber roofing is the most prevalent and frequently utilized. Rubber roofing is also the most cost-effective roofing material. The most frequent materials used to produce rubber rolled roofing are recycled tires, sawdust, and slate dust.

Rubber roofing may be put on any flat roof as overlapping sheets. Rubber roofing is also available in shingles that look similar to slate tiles. Rubber-rolled roofing has several advantages, including being inexpensive, long-lasting, and simple to maintain.

  1. TPO Rolled Roofing

TPO roofing has become more prominent than any other rolled roofing due to its low cost and good durability. TPO (Thermoplastic Polyolefin) rolled roofing comprises a mixture of ethylene propylene and polypropylene. The manufacturing procedures, as well as the quality, differ widely.

The most significant advantage of TPO roofing is its low cost. It is less expensive than EPDM shingles. The white tint of TPO roofing also improves heat resistance and prevents heat buildup in the structure. TPO is also resistant to corrosion and inhibits algae and mildew growth.

  1. Epdm (Rubber Membrane) Rolled Roofing

EPDM roofing, often referred to as rubber membrane roofing, is a different type of rubber roofing. Rubber roofing is created from recycled rubber as well. EPDM rubber roofing, on the other hand, has the advantage of being incredibly lightweight while still being incredibly tough.

EPDM rolled ruffing, like regular rubber roofing, is affordable, long-lasting, and simple to install. EPDM flooring does not require any extra reinforcement because it is lightweight. There are adhesive seams on every EPDM floor, so you won't have to bother about leaks. EPDM rolled roofing is a long-lasting material that can last up to twenty years.

  1. Bitumen Rolled Roofing

Bitumen rolled roofing is a type of asphalt roofing developed and supplied as rolls for the first time. It can be self-adhesive or cold-press adhesive. Bitumen rolled roofing seams are welded together. The most significant advantage of bitumen roofing is its long lifespan. Modified bitumen roofing has a longer life expectancy than most other types of rolled roofing. Bitumen roofing can survive for more than twenty years if appropriately maintained.

The article has given a step-by-step procedure on installing rolled roofing on a flat roof; we hope you find it easy. However, to make your work easier, you can contact us at Queen’s Best Roofing and Siding Company at 68-38 Main Street #2 Flushing, NY 11367 via (718) 489-4009 or reach us through our mail [email protected]


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