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  • Ballasted Roofs Meet Cool-Roof Criteria | Architect Magazine

    Ballasted Roofs Meet Cool-Roof Criteria | Architect Magazine

    May 13, 2009 Washed river-rock ballast has an emittance of approximately 0.88 and a continuous reflectance of approximately 0.22, but it is the mass of the ballast that acts as a heat sink and simulates the performance of a traditional cool-roof surface with high solar reflectance and high thermal emittance.

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  • A New Look at Ballasted Roofs | WATERPROOF! Magazine

    A New Look at Ballasted Roofs | WATERPROOF! Magazine

    Jan 13, 2010 For purposes of this section, “ballast” shall mean river rock aggregate or larger, pavers, or other means of weighing down a roofing membrane over a substrate to resist wind uplift.” John Geary, vice president of marketing, Firestone Building Products, says, “There’s a growing perception in the building community that reflective ...

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  • ANSI/SPRI RP-4 2013 Wind Design Standard For

    ANSI/SPRI RP-4 2013 Wind Design Standard For

    2.1 Ballast In roofing, ballast comes in the form of large stones, (typically river bottom stone in. to 1 in. diameter, size No. 4 per ASTM D448 “Standard Sizes of Coarse Aggregate” or ASTMD7655/D7655M-12 “Standard Classification for Size of Aggregate Used as Ballast for Membrane Roof Systems”) or

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  • PRODUCT DATA SHEET - Hanover® Architectural Products

    PRODUCT DATA SHEET - Hanover® Architectural Products

    11.27.18 5000 Hanover Road, Hanover, PA 17331 • 717.637.0500 • Fax 717.637.7145 • www.hanoverpavers.com PRODUCT DATA SHEET Hanover Prest Pavers (continued) Page 2 of 2 RELATIVE STRENGTHS: (at 2” thickness) Absorption: less than 4% Compressive: 8,500 psi at 28 days

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  • Mid-State Hydro Vac

    Mid-State Hydro Vac

    Ballast River Rock Removal. Ballast vacuuming services will remove all river rock from single-ply roofs. Our process, as opposed to traditional forms of removing ballast reduces intense labor portions as well as minimizes risk of damaging roofs with shovels & wheelbarrows. Most importantly saves time allowing projects to run efficiently.

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  • Protected Membrane Roofing Ballast Options - American

    Protected Membrane Roofing Ballast Options - American

    Ballast Options and Flexibility. One of the advantages of using MM6125 in a Protected Membrane Roof Assembly (PMR) is that once the membrane is installed owners and designers can take advantage of various ballast options (gravel, pavers and Garden Roof ) to suit a specific project’s needs.

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  • Ballasted Roof System | Ballasted EPDM

    Ballasted Roof System | Ballasted EPDM

    Drawbacks of a Ballasted Roof System. Adds a lot of weight to the roof system, typically 10-15 pounds per square feet. Extremely difficult to find a leak in this system, since the membrane is well hidden. Ballast stone traps a lot of dirt, making patching difficult. Ballast stone fractures and gets sharper over time, which can puncture the ...

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  • Roof Preparation and Roof Vacuum Services | RK HydroVac

    Roof Preparation and Roof Vacuum Services | RK HydroVac

    Ballast Removal (Single Ply and IRMA systems) 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.

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  • What is the SRI value of light gravel used on roof buildup

    What is the SRI value of light gravel used on roof buildup

    A ballasted roofing system normally consists of river-rock ballast over a membrane, rigid insulation, and a metal roof deck. Though the solar reflectance is lower than a traditional cool roof, the river rock has high thermal emittance properties and the mass of the ballast acts as a heat sink, resulting in, according to some, a similar overall ...

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  • KIRBYS SAND & GRAVEL - Gravel

    KIRBYS SAND & GRAVEL - Gravel

    Unwashed Landscaping, Decorative, Drainage and Roof Ballast Stone. Click here to edit text #2 Round Blue Gravel Approx.1 1/2 ... 8 Unwashed Rock. Large Mixed Color Decorative Rock. Approx. 12 -24 Unwashed Rock. Big Rock. Approx. 24 + Unwashed Rock. Business Hours Monday -Thursday 7:00am-6:00 p m F r i d ay 7: 0 0 a m-5: 0 0 p m S a t u r d ay ...

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  • cost per ton for roof ballasts - BINQ Mining

    cost per ton for roof ballasts - BINQ Mining

    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 rock.cost of rock per ton in bay area. price per ton of granite quarry screenings. More detailed

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  • The Purpose of Ballast on a Flat Roof | Roberts Roofing

    The Purpose of Ballast on a Flat Roof | Roberts Roofing

    Sep 19, 2019 Though not as common as they used to be, ballasted roof systems still prove to be a viable solution for today’s commercial roof needs. To learn more about selecting a commercial roofer in Cleveland, Ohio, simply fill out the form on this page and a member of our team will be in touch. Or, you may call us at 440.946.2233.

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  • Rock Removal - Roof Vacuuming Services

    Rock Removal - Roof Vacuuming Services

    This solution for roof ballast rock removal is cost-effective and efficient. Let’s make dirty, dangerous rock removal a thing of the past. Please call us at 1-800-307-3719 and we’ll provide a quick and free quote. Important Pages and Other Information: Specifications of ballast removal equipment: Hurricane 655 Power Vacuum

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  • Ballasted EPDM roof systems have been a sustainable

    Ballasted EPDM roof systems have been a sustainable

    The benefits of a ballasted roof assembly don’t cease when a ballasted EPDM roof has reached the end of its useful service life. Often, when a ballasted system needs to be replaced, it is supplanted with another ballasted system. Ballasted roof systems are some of the easiest to retrofit because existing components, including the ballast and

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  • Rock Vacuum From Single Ply and IRMA Systems | RK

    Rock Vacuum From Single Ply and IRMA Systems | RK

    Single Ply and IRMA Systems Rock Vacuum. Our Rock 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.

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  • A Guide to: Flat Roof Maintenance and Preparations

    A Guide to: Flat Roof Maintenance and Preparations

    Roof Maintenance. Ballast and River Rock Removal. Consistent roof maintenance is necessary for proper roof care. Ballast or river rock might need to be removed due to excess weight, or during a routine swap out. Ballast and River Rock vacuuming removes all rock quickly and effectively from the roof. The vacuuming service allows for a less labor ...

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  • Built Up Roof Materail Removal: Gravel | Ballast | Soil

    Built Up Roof Materail Removal: Gravel | Ballast | Soil

    Ballasted Roof Rock Removal. A ballasted roof uses larger and heavier stone, compared to a built-up roof, and is laid over the roof membrane. The stone, gravel, or rocks are used as a weighted barrier for the materials below. The weight of the gravel or stone is helpful for distribution purposes.

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  • Thermography for ballasted rubber roof? - Thermal

    Thermography for ballasted rubber roof? - Thermal

    Jul 29, 2008 The ballast is substantially river rock in 2 and 3 inch sizes, about 4 inches deep. dandersen (David Andersen, TN HI# 40) July 28, 2008, 9:58pm #8

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  • Rooftop Vacuum Services | Great Lakes Power Vac | Great

    Rooftop Vacuum Services | Great Lakes Power Vac | Great

    We remove ballast—ranging in size from pea gravel to coarse river rock, as well as non-embedded dirt and debris—to ensure roof readiness for repair or resealing. Our 15 cu. yd. capacity trucks can convey materials over long hose runs: excellent loading rates can be achieved over distances of up to 650 feet.

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  • 02900 Pre-Cultivated Green Roof Overburden System

    02900 Pre-Cultivated Green Roof Overburden System

    Hanover Architectural Products, Inc., Hanover, PA. L. River-Rock Ballast: River washed rock used as ballast shall meet the ASTM D 448 #57 requirements. Diameter of the rock particles shall maintain a nominal 3/4 inch to a maximum 1-1/2 inch range. PART 3 EXECUTION. 3.01 PREPARATION

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  • HANOVER ARCHITECTURAL PRODUCTS | ROOF BALLAST

    HANOVER ARCHITECTURAL PRODUCTS | ROOF BALLAST

    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 Roof Ballast Pavers reduce roof life cycle costs (vs. stone ballast) with lower installation and maintenance expenses. By creating a limited pedestrian walkway, Roof Ballast

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  • Hanover Architectural Products

    Hanover Architectural Products

    Hanover's extensive line of paving products truly completes your home and landscaping. While unique color and aggregate blending and custom sizes have become Hanover's trademark, a wide range of products are stocked in several standard colors, sizes, and textures.

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  • Roof Pavers / Pedestal Systems

    Roof Pavers / Pedestal Systems

    Hanover Roof Pavers work hand in hand with Green Roof assemblies to provide environmental benefits while creating aesthetically appealing rooftops and plaza gardens. Explore . Ballast Pavers • Standard Ballast Thickness: 1 13/16 ... Hanover manufactures two types of Roof Ballast Pavers ...

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  • Why Put Gravel on a Flat Roof - The Purpose of Gravel on

    Why Put Gravel on a Flat Roof - The Purpose of Gravel on

    Ballast stones are usually one to two inches thick and applied more generously than on a built-up roof. The heavier stones provide substantial protection against wind gusts. (Source: Roofing Southwest.) A ballast system helps cut roof system application costs, as it takes less time to install since sealing the layers together isn’t necessary.

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  • sri value rating of river stone ballast | Solution for ore

    sri value rating of river stone ballast | Solution for ore

    A ballasted roofing system normally consists of river-rock ballast over a ... maryland river rock for ballast - Crusher South Africa... (2995 Ratings) ... ornamental roof ballast river rock. What is the SRI value of light gravel used on roof buildup ... roof gravel river stone prices. ornamental roof ballast river rock - beltconveyers.net

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