Flat Roof Plywood

Measure your roof and select an appropriately sized epdm membrane.

Flat roof plywood.

Roof decking is the material that lies on top of the main roofing structure and the underlayment and roof covering is applied on top. Yet for historic modern style buildings like this old house s cambridge tv project flat roofs are at the core of the architecture meant to reflect the broad horizontal lines of the natural landscape. Zip system sheathing and tape provides a water resistant durable underlayment for many finished roof coverings including metal tile and asphalt shingles fiberglass shingles and cedar shingles. Most roofs will be sheathed in plywood at least 3 8 inch thick.

Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. Most standard epdm membranes are 1 2 millimetres 0 047 in thick and 15 by 30 metres 49 by 98 ft max. Plywood for a roof deck should be of marine grade and suitable for external use to bs en 636 or a bond class 2 or better complying with bs en 314 check. This minimum will only work if the rafters are set 16 inches apart at most and if the roof doesn t have too much load.

Double nailed at each joist. Why is plywood used in roofing. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. Osb and plywood come in thicknesses ranging from 5 16 to 3 4 inch and the thickness needed for a particular roof depends on several factors including rafter spacing expected load and roof.

Osb is made of small and fairly rectangular shaped wood chips from small resinous trees which are bonded into a panel form with wax and synthetic resin. Zip system panels install fast and stay flat for a roof that looks as good as it performs. Home flat roofing plywood sheets. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.

Loads will vary with the pitch of the roof. In roofing plywood is often selected due to its strength. Whatever you re working on our range of plywood board contains everything you need at our famously low prices. Of course you don t need to live in a modern house to deal with a flat roof.

Browse our range of roof boards below and choose between general purpose hardwood plywood shuttering plywood exterior wise spruce plywood sheets and more. That s considered to be the minimum. A minimum thickness of 18mm these will be able to span up to 600mm. Especially in relation to osb or plywood use for roofs walls floors.