Flat Roof Joist Fixings

Fix the new joists to the ledger with appropriate timber to timber joist hangers.

Flat roof joist fixings. It takes time experience and equipment which larger merchants often do not have. Strutting is not required when hangers the full depth of the joist are used to face fix joists to the blocking. We stock only the best bracketry at great prices that will provide the securest fixtures such as. Stainless steel brackets stainless steel fixings steel strapping heavy duty joist hangers and square plate washers.

Firrings are used to create a fall on flat roofs. The warm flat roof has a plywood decking board that is laminted to a layer of. Where connected to steel beams metal web joists should not be notched at the flange and. Where a new flat roof abuts an existing external wall the joists can be hung on metal joist hangers which are fixed to a horizontal timber plate wall bolted to the wall.

These one piece hammer in fixings are part of a range of insulation anchors manufactured by thor helical. If your plate and ledger are straight and level the you will have a nice flat ceiling. Normally i would set the joists out at 400mm on center for the ceiling plasterboard and set them in 50mm from the inside wall. Set out the ceiling joists onto the wall plates the ceiling joists are installed before the rafters as they will stop the roof spreading and also give something for you to lay planks across to stand on when building the roof.

7 1 3 flat roof and balcony design. Create timber frame structures with toolstation s range of nail plates including galvanised nail plates and safe metal fixing plates. Flat roof insulation is in fixed to rafters with hammer in insulation fixings. A cavity closer should be provided to the top of the walls to prevent fire spread and to stop damp air entering the roof space.

Firrings are cut through the length of the timber to create a slope when laid on top of roof joists for a flat roof before being covered with osb or ply then finally felt. Make sure your osb is tongued and grooved triple up your trimmer joists that the lantern sits on use joist hangers where any joists butt into one another use long helical nails or long frame fixings to secure the top layer of osb to the joists beneath and the best tip of all is for those size joists hire a chainsaw for the weekend you. 7 1 4 timber and timber decks. To fix the joists and rafters down on to the wall plates they should be toe or skew nailed to the top plate like below.

The fasteners have a twin start spiral shank welded to a button head and are designed to secure plywood topped composite insulation boards to timber roofing rafters.