2019-09-19· The ballast is used to keep the roofing system cool and of out of the sun’s harmful rays, thus keeping energy costs down. The gravel top coat is also extremely resilient to heavy foot traffic and high-wind scenarios. Despite the positive qualities associated with a ballasted roof system, there are some challenges. It is very important to note
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.)
Roof leak investigation on a ballasted roof can be a bit of a nightmare. Ballasted roof systems hold dirt and dust in between the stone which makes finding small punctures very difficult. Plus, the only way you’re able to see the membrane is to move the ballast. That means somebody (Mr. Roofer) is shoveling stone out of the way.
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. The stones are therefore
When there’s a ready source of ballast, the roofing can be installed quickly, saving labor costs and reducing the overall cost. Aesthetics. Ballasted roofs provide a pleasing texture, which can be combined with pavers for walkways (see Fig. 2). Fig. 2. Fire resistance. It’s a well-known fact that rocks don’t burn. As a result, Class-A
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
Icopal SLP300 Protection Fleece is intended to be used as a protection and/or separation layer against mechanical or chemical damage, and is used between the Icopal waterproofing membrane and overlying components such as non-compatible inverted roof insulations, gravel or paved ballast, or green roof systems.
2018-09-18· An even layer of 20-40mm round washed ballast must be laid to a minimum depth of 50mm, a wind uplift calculation must be completed to determine the actual loads being exerted on the roof, the minimum requirement will be 80kg per m² but may be higher based on the wind uplift report. It must be ensured that the underlying structure can withstand
GravelBond is a colourless adhesive for bonding river wash ballast or slate chippings to roof membranes. It keeps gravel secure and in place during strong winds or roof access work, preventing damage or injuries caused by falling ballast.
roof insulation upstand 12.5 mm plasterboard fi xed to 25 x 50 mm timber battens at 600 mm centres Kingspan AQUAZONE® Gravel ballast Non–woven polyester fl eece layer (if required) 2 layer mastic asphalt waterproofi ng on an underlay of Type 4A sheathing felt to BS 747: 2000 Kingspan Styrozone Kingspan Purlcrete®chevron upstand min. 300 mm
Kafka Granite’s white roof crushed aggregates, manufactured sands, and round pebbles can be quickly and easily applied to any preexisting rooftop using a two-part epoxy. Birchwood is also available in 1 1/2″ for traditional roof ballast applications. White roofs, also known as cool roofs, greatly reduce the amount of heat absorbed by
Wraxalls roofing shingle is a clean natural material with a good visual impact, power-screened to industry standards. This is an alternative size for most ballasted flat roofs with a higher wind-load. Easy to spread, the material provides good insulation and drainage and is ideal to walk on during roof inspections. More Text & Images...
MB Section 9: Protected Membrane & Combination Designs A protected membrane roofing design is an insulated and ballasted roofing system in which the primary insulation is applied above the modified bituminous membrane and retained in place by ballast..2. A combination roofing assembly is comprised of a conventional insulated membrane system
Engineered for use on heavyweight decks (e.g. reinforced concrete) with a ballast layer of gravel or concrete slabs, Styrofoam™ Brand Roofmate™ Insulation helps the roof membrane maintain a steady temperature, minimizing the harmful effects of freeze-thaw cycles, weathering and physical damage during and after construction.
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...
Jewson supplies a wide range of aggregate products that can be used in both base and decorative applications. Our base products include ballast, building sand, sharp sand, crush and gravel for various construction uses. Our decorative products include slate, chippings, pea gravel
This is a free online tool by EverydayCalculation to calculate material consumption for a concrete structure i.e., quantity of cement, sand, stone gravel required in different concrete ratios.
BALLAST Ballast will be specified by architect / engineer but generally the gravel will be clean rounded river pebbles 20-40 mm. Thickness of 50mm for insulation up to and including 50mm, 75mm thick for 75mm -100mm insulation. Concrete Pavers should be a 40-50mm thick as a minimum. ACOUSTIC AND THERMAL COMBINATIONS
50mm Cellecta Hexatherm XROOF 300L is an extruded polystyrene thermal insulation board designed specically for inverted roof applications where a high resistance to compression and water absorption is essential. XROOF roof insulation boards are ideal for a multitude of roofing requirements, including pitch roofs, inverted flat roofs, flat roofs and green roofs.
Loose 20mm (3/4) rounded shingle priced and sold per tonne. Delivery on a 3.5t tipper truck ALL PRICES INCLUDE VAT
2009-05-13· By comparison, a roof with ballast over a roof membrane also can reduce peak rooftop temperatures and delay the heat flow into a building. However, because ballasted roofs do not meet the traditional requirements of reflectivity, ballasted roofs had not been officially recognized as a cool roof.
LOOSE LAID & BALLASTED SYSTEm Application instructions for alkorPLAN® membrane, loose laid with ballast. Garden roof (warm roof) Inverted roof Warm roof Ballast and/or paving slabs on support pads alkorPLAN® 35121 protective layer alkorPLAN® L 35177 membrane Faced insulation alkorPLUS® 81012 vapour control layer alkorPLUS® protection layer
Gravel Calculator This gravel calculator provides a rough guide to how much gravel you will need to cover a specific area (such as a driveway). The depth will depend on the size of the material as well as its intended use.
Specialist Aggregates' Price Promise: All prices shown include UK VAT and delivery to mainland locations in England, Wales and Southern Scotland There are no hidden charges on checkout. We export throughout Europe and Worldwide please enquire for shipping rates Logistics: This product option is supplied packed in safe and easy to handle weatherproof packs stacked on a
The Roof Guy Post author September 14, 2017 at . Hi John, Yes, you can go with either EPDM rubber, PVC (Best Option) or TPO roofing membrane. If you plan to have a new roof installed over the existing tar and gravel roof, then you will need to ensure the roof deck and substrate are in good shape with no leaks, trapped moisture and rotting
Kilsaran International are Ireland's leading supplier of a range of construction products including concrete, paving supplies and asphalt and road surfacing materials.