putting a timber deck on a flat roof

Seven Trust

this is video 1 of 5 on how to install a grp fibreglass flat roof from start to finish. this video deals with the basic construction of the timber decking, c.

high as the flat roof insulation upstand. waterproofing e.g. single-ply non-bituminous membrane. kingspan element of the. roofing system. protection layer*. kingspan. roofing system infill panel. the kingspan. roofing system, when used in the design in figure 3 and when used on top of a timber deck with plasterboard.

deck posts placed on flat roofs, even those resting on 2-by block to distribute weight, risk puncturing the roof membrane, causing leakage. . "make sure your roof load can support it or that you put direct support under it going down to load-bearing walls so that they support the weight," he says. calling in an.

if left long enough, this can turn into something nasty such as a timber fungal infection and create foul odours. . the most effective method of insulating your flat roof is by installing a 5″ warm-roof slab of pir insulation to your existing roof deck and then installing a long-lasting professional flat roof covering on top of it.

anyone have a great graphic or pic of the proper method of constructing a wooden deck on a flat roof?have just decreased the life of the roof by about 1/2 and increased the cost to replace the roof by three times (added labor cost to remove deck, replace roof and put roof back, which is never done well).

what i will be adding is my 30+ years of flat roofing knowledge, put them in order and add things either not covered, or make suggestions i think will help you fit . complete roof deck replacement – ripping all previous traces of the old roof including felt / asphalt and contaminated timber to reveal roof joists, then renewing.

design and installation. when installing quinn therm qrfr boards to a timber deck an avcl should be laid over the deck with 150mm sealed laps, turned up at any vertical upstand. the avcl should consist of minimum 1000 gauge (250μm) polyethylene sheet. roof joists; timber deck; avcl; qrfr boards.

deck types for flat roofs . similarly, plastic or painted soffit types of decking may become damaged by the heat used when installing torch-applied membranes. . timber boarding suitable for roof decks should be a minimum 19mm nominal thickness, planed and closely clamped together, tongued and grooved or closely.

it is not advisable to put your new decking or slabs down on top of an old felt roof surface because these tend to melt in the summer heat and become brittle in the . popular options for the surface of a flat terrace roof conversion include lightweight patio slabs or either timber (softwood or hardwood) or composite decking.

roof deck topics covered include: deck foundation: using deck supports, which are adjustable in both height and pitch, for the foundation. deck joists: notching posts to fit deck band joists for added support. composite decking: installing tongue and groove composite decking with hidden fasteners.

buildingregs4plans flat roof guidance provides information on flat roof deck, design, and materials including timberboarding, plywood, oriented . the material used for the roof deck must be moisture resistant and will usually be plywood, osb or timber boards although concrete and woodwool slab or profiled metal can.

timber sheet decking. tapered batten. figure 2.7: typical warm deck flat roof a: roof covering, b: overlay panel, c: rigid insulation, d: vapour control layer, e: structural roof deck. table 2.4: panel grades* for flat roof decking and the location of design and testing information. selection. roofs construction plywood.

the techniques of timber flat roof retro-insulation are essential knowledge to be able to design and specify correctly. check for . warm roof • the roof deck is kept warm through placing the insulation above it. the waterproof covering is above the insulation and the vapour control layer is placed below the insulation.

water must be allowed to flow off flat roofs as puddles of water are very heavy and they soon force a dip into the timber roof decking which then becomes bigger allowing . put simply a warm flat roof has insulation of some kind packed into every available void and a cold flat roof allows air to circulate between the joists.

flat roofs are prone to leaking even without decks because of design errors, improper materials, and improper installation. many times when roof decks are installed they further damage roofs causing more severe leaking and drainage problems. proper waterproofing for a roof deck involves installing an epdm membrane.

regarding the roof covering you can use a high performance single ply pvc roofing membrane to weather your roof. this can then be overlayed with either a timber decking or a paving slab on supoorts/pebbled finish. the decked area would obviously not be fixed through the roof membrane and just sit.

inverted warm deck flat roof insulation puts the insulation above the waterproof membrane . timber roof: 12.5mm plaster board, 150mm timber roof space with no insulation, 20mm timber decking, insulation, 6mm felt weather cover;; concrete roof: 12.5mm plasterboard, 22mm batters, 150mm concrete deck, insulation, 6mm.

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putting a timber deck on a flat roof