Fixing Flat Roof Joists To Wall Plate

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.

Fixing flat roof joists to wall plate. 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. It will have a dwarf wall about 800 high to 1. The wall plate is laying flat and is sitting 2 proud of the brick work. This mean you will have a good depth for using stronger 4 nails to nail the joists down.

Install steel joist hangers at each mark. Wall plate for a flat porch roof. Mark the installation location for each joist along the wall plate. 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.

If the wall plate of the flat roof is level with the wall plate of the existing house can you make the two wall plates the same height then you will need to strip off some roof tiles and run the new joists through butting and fixing them up to either the roof rafter or the ceiling joist on top of the house wall plate. Wall sheathing as required use single i joist for loads up to 2000 plf double i joists for loads up to 4000 plf filler block not required. Buy wall plate straps and a box of washer nails to fix them to the masonry. All nails shown in the details above are assumed to be common nails unless otherwise noted.

10d box nails may be substituted for 8d common shown in. Hi all i am planning on building a small sun room conservatory 2mx2m at my house. Otherwise setting roof trusses onto wall plates can be done by the average do it yourselfer usually in one to two days depending on the size and scope of the project. Building a dwarf wall for a coservatory next to a garden wall.

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. Fixing roof trusses to a wall plate requires a small amount of carpentry knowledge such as the abilities to read a tape measure and operate a framing square. This is for a storage area in a barn for saddles and not for a domestic property etc and is only going to have 3 4 osb board laid accross the joists. Nail the the first wall plate to the wall using masonry nails then nail another one on top with 3 wire nails.

You will get a better fixing if you double up your wall plate. Hi guys just need some advice on fixing my wall plate to an old granite wall. Start at one end of the wall so that the first joist is flush with the walls which run parallel to the joists. The roofs size is 2 8mx1 6m.

Attach i joist to top plate using 8d nails at 6 o c.