Mastic asphalt warm roof on timber decks on cork, mineral wool, cellular glass, perlite, rigid urethane (pir), phenolic or composite insulations. Iko mastic asphalt roofing systems also provide an advantage for large projects as it can be laid at speed when supplied to site in bulk by hot charge transporters. Now the temperature of the mastic asphalt must be controlled inside the mixer to ensure the consistency remains consistent.
Kettering Asphalt Flat Roofing and Flooring Northamptonshire
Minimum 3/8” plywood, minimum 7/16” oriented strand board or waferboard.
Skirtings and upstands skirtings and upstands other than timber or lightweight concrete on skirtings and upstands up to 300mm high the mastic asphalt should be applied in two coats to a thickness of 13mm.
A mastic asphalt vapour barrier should be laid in a single coat no less than 10mm thick on a grp tissue. Underlayment and shingles installed directly over roof insulation or similar type decks is not approved. The construction information service brings together a comprehensive collection of essential technical documents from a wide range of publishers in one online package. This is important to ensure the asphalt roof is laid perfectly.
Mastic asphalt is an ideal material for a whole range of construction applications, both new build and refurbishment, where a smooth, seamless, durable surface is required.
The british standard for mastic asphalt paving is bs1447:1998 specification for mastic asphalt (limestone fine aggregate) for roads,footways and pavings in buildings. Iko permascreed is a mastic asphalt levelling screed for flat roofs, walkways & vehicle decks. It should be lpcb approved Surface should be covered in solar reflective paint or stone chippings bedded in bitumen based adhesive.
4.4 incorporates 50mm thickness of insulation to provide a u value of approximately 0.45 (w/m2k) for the total construction.
The addition of sbs (styrene butadine styrene) polymers to the bitumen binder gives an increased tolerance to building movement, climatic extremes and thermal shock. Mastic asphalt is one of the world’s most traditional Once the mastic asphalt has been fully agitated and has reached a temperature of 220° it is ready to lay upon the flat roof. Polymer modified mastic asphalt is installed by trained operatives who have undertaken the mastic asphalt industry’s
The specification shown in fig.
It is manufactured in the uk from selected bitumen’s, limestone filler and specially graded aggregates. It is designed to provide drainage falls as well as a stable base for the specified waterproofing system. By this method, one 18 tonne hot charge delivery vehicle can supply enough mastic asphalt to. Brush grade mastic is asbestos free.
Horizontal surfaces when designed as a roof lawn, reservoirs or as a buried waterproofing membrane, the mastic asphalt is laid in three coats to a thickness of 30mm over a setting apart membrane of grp tissue.
Apoc 305 dampproofing mastic is a trowel grade, fiber reinforced, asphalt based product for coating concrete, metal and other vertical surfaces. Two coats of mastic asphalt r988 t25 on sheathing felt to a thickness of 20mm. In a typical roof specification the product is applied with a wooden float to a depth of 20mm in two 10mm passes, and the surface is then sand rubbed to reduce crazing as it cools. A mastic asphalt vapour barrier should be laid in one coat not less than 10mm thick on a glass fibre tissue.
Only a certified, trained operative can install mastic asphalt.
Mastic asphalt remains the unrivalled choice for many designers and specifers. It offers total waterproofing integrity for roofing and tanking and acts as a tough working surface in flooring and paving. Roof deck must be dry, minimum 25/32” thick, maximum 6” wide boards, or apa rated sheathing (exposure 1): Roofing mastic asphalt vapour barrier.
Natural rock aggregate mastic or limestone aggregate mastic.
On skirtings and upstands over. Engineered roofing systems are high performance and insulated, which can consist of bituminous membranes, mastic asphalt, and polymeric single ply. The british standard for mastic asphalt roofing,tanking and flooring is bs6925:1988 specification for mastic asphalt for buildings and civil engineering (limestone aggregate).
