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.

Lay your chalk line across your two pencil marks and snap a line across all of the joists in between. Keep in mind that the joist extends through the wall. Place the planks plates on the marked position. To replace the joist you need to measure the entire length.

However replacing the entire joist gives the home much better structural integrity. Drill holes for fixing the screws. It could be more to make sure you get adequate water run off 1 40. To repair a roof joist you will need to either replace the entire joist or use a spliced in piece of wood.

The new section of timber is now put in place with the threaded steel bars sitting in the slot. Slot cut out in existing timber. Measure and cut 2 by 4 inch lumber to fit the gaps between each set of joists. It can enhance the damage.

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. Measure and mark the joists at each end of the roof about 4 feet in from the edge. Do not use nails and avoid hammering the joist. Fix the reinforcement board plate on one side of the joist with the help of long wood screws.

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.