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Firestone EPDM Ballasted System Application. The Firestone EPDM Ballasted System is an economical EPDM Roofing System, suitable for a wide variety of buildings.It can be applied on any building that can accommodate the extra load of the ballast and where the roof .

Hanover Roof River Rock Ballast,we Ltd. is a large-sized joint-stock enterprise integrated with the scientific research, production and sales of heavy mining machinery. It is located in high and new technology industrial development zone, Zhengzhou with an area of 200,000 m².

2 apply ballast uniformly over fabric at rate required by american hydrotech, inc and the dow chemical company 3 ballast shall consist of crushed or river bottom stone andor pressed concrete pavers a stone ballast shall be in accordance with astm d4. York, pennsylvania trails trail maps

White Ballast can range in size from 2 1/2 - 3/4 inches and can be made to meet various ASTM standards. Our roofing Ballast is commonly installed over membrane and single-ply systems at 1000-1500 pounds per square. Ballast is a natural product that does not require any chemicals in manufacturing and is fire-resistant.

Jan 28, 2014· We can offer very competitive pricing and great expert work by our trained professionals. Thank you for choosing Velocity Roof Vac Services, Inc. for your gravel, stone, roof rock removal & roof ...

- Ballasted low-slope roof systems (roof slope < 2:12) are allowed in accordance with SPRI RP-4. Size of aggregate is governed by ASTM D 448 (#4 - 1-1/2 in . and #2 - 2-1/2 in). Limited to wind speed of 140 mph and building height of 150 feet.

A layer of pebbles can substantially extend the life of a flat roof. A flat roof will have several layers of a thin membrane made of tar, asphalt and/or bitumen material. Pebbles or small rocks spread several inches thick over the outer roof mem...

Ballasted EPDM roof systems have been a sustainable option for decades by Ronald L. Goodman B Before sustainability became a popular concept in building design, ballasted EPDM roof systems were widely used. Dating to the 1960s, this time-tested, reliable roof system still offers more sustainable fea-tures than many systems currently available.

The concept of using concrete pavers or porcelain pavers as roof ballast, plaza deck and terrace pavers has created new opportunities for otherwise lost space. Roofs and decks can now be functional, as well as attractive. Tile Tech Pavers provide durability, protection and performance for the roof system from harsh weather conditions while ...

Ballast removal and re-ballast, or "swap-out" as some call it allow you to save on the cost of purchasing new ballast for your repair or re-roof jobs. This process begins with vacuuming all 1" to 2.5" river rock from single-ply roof systems. The roofing contractor will have an area onsite to stockpile the vacuumed gravel to be used in ...

A wide range of sizes are available at a 113/16"thicknessand a weight of 23 lbs/sf. Unlike river gravel which has been known to be hazardous, pavers used as ballast or walkways provide a durable, safe method of protecting the roof system. Hanover® Prest® Pavers are available as a single source component from several water proofing manufacturers.

Jan 19, 2013· river rock prices per ton north carolina – Grinding Mill China. Cost per ton: $170; Mini Pallet (500 pounds): . price per ton of roof ballast river rockst of rock per ton in bay area. price per ton of granite quarry screenings. »More detailed

Jul 17, 2017· Knowing the size of the area you plan to fill with river rocks helps you accurately calculate how much of the rock you need. For square or rectangular areas, just multiply the length of the space by the width.For example, if your flowerbed is 10 feet long and 6 feet wide, it's 60 square feet.

Ballasted Roof System. Ballasted roof systems have been installed since the early 1970's. They are known for their installation speed and pleasing aesthetics. Most ballasted roof systems use gravel stone that is similar to what would be used in landscaping. However, other ballasted systems use pavers, which are easier to walk on and can be ...

Ballasted flat roofs are a popular choice, especially for commercial buildings. Additional benefits of ballast on a flat roof. The gravel in a ballasted roof helps absorb heat, preventing the sun from heating the roof materials below and making the roof more energy-efficient. (Sources: WATERPROOF! Magazine and Roofing Southwest.) Although ...

A wide range of sizes are available. Unlike river gravel which has been known to be hazardous, pavers used as ballast or walkways provide a durable, safe method of protecting the roof system. Lightweight Ballast Pavers can be used when the roof will not accommodate the load of a standard paver.

Talk to ten roofing contractors and you'll get ten answers on what the gravel is for, but this seems to be the consensus: (1) Stabilization. In a typical tar-and-gravel roof (which, by the way, is gradually being supplanted by gravelless roof systems), you put down a layer of tar paper, then tar, and finally gravel. Tar has a low melting point.

Conventional Ballasted Roof System – consists of membrane or membrane and substrate material loose-laid over a deck using ballast to hold the system in place. Protected Membrane Ballasted Roof System – consists of a roof deck, with or without insulation, over which the membrane is installed.

ASTM D 448 - Naturally rounded, off-white and beige quartzite. Used in roofing applications.

The gravel used in built up roofing (what the roofing contractors were used to) was not the same as that used in a ballasted roof. For built up roofing, the gravel was generally .25 - .5 inches in diameter. The stones used in ballasted roofing are generally 1.5 - 2.5 inches in diameter and applied in a thicker layer.

Ballasted roofing systems rely on weight installed on top of the membrane to hold the membrane and the insulation below it still and in place. In most cases rock (smooth river worn rock) is the ballast applied over the membrane to weight it down; however, concrete pavers and garden roofs operate under the same principals holding the roofing ...

Our ballast vacuuming services will remove all 0.75" to 2.5" river rock from single-ply roofs. By removing ballast this way rather than traditional shovels, wheelbarrows, and chutes, you remove the most labor intensive portion of ballasted single-ply tear-offs. This saves you time, labor, injuries, Read more »

A "ballasted roof" generally refers to a single ply roof membrane that is held in place against wind uplift by loading the surface with either stone ballast or pavers. The membrane for such systems is usually not attached to the substrate, although some systems do have supplementary perimeter attachment. Since the ballast is the primary ...

application of GAF's ballasted single-ply roofing systems and is based on our years of experience in the commercial roofing field. It has been prepared as a general guide to assist architects, engineers, roofing contractors, and owners in the use of our roofing systems. • GAF manufactures and sells roofing materials and does not
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