How To Fix Flat Roof Joists

To do this you will need to cut a slot into the existing truss rafter or joist in a u shape to the required length of the threaded steel bars in the new section of timber.

How to fix flat roof joists. Measure and mark the joists at each end of the roof about 4 feet in from the edge. To repair a roof joist you will need to either replace the entire joist or use a spliced in piece of wood. 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. Do not use nails and avoid hammering the joist.

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. Drill holes for fixing the screws. Fix a ledger to the house wall. If the wall plate of the flat roof is level with the wall plate of the existing house can you make the two wall.

Place the planks plates on the marked position. Fix the reinforcement board plate on one side of the joist with the help of long wood screws. To replace the joist you need to measure the entire length. Slot cut out in existing timber.

Keep in mind that the joist extends through the wall. The new section of timber is now put in place with the threaded steel bars sitting in the slot. It can enhance the damage. It could be more to make sure you get adequate water run off 1 40.

Do this with an expanding anchor bolt or other appropriate masonry fixing.