How To Attach Roof Joists To Wall

Then force the rafter s tip snugly against the house wall.

How to attach roof joists to wall.

Joist hangers can help you mount each rafter to the house. Attaching wood framing members to a brick wall is tricky especially if the framing will support any load as it does when a roof intersects the wall. To cut sloping rafters for a house attached patio roof lay a rafter board so it rests on its edge on both the ledger and the beam parallel to the ledger. Using a block of wood as a ruler mark the ends for cutting.

Set the roof truss on each mark. Temporarily nail or brace the ledger in place positioned and leveled at the desired height. The joist can be toe nailed into the top plate or a joist bracket can be used. If it is impossible to attach the ledger to a floor joist then fasten the ledger to wall studs which are generally located on 16 inch or sometimes 24 inch centers and doubled up around doors windows and other openings.

Secure it with a joist hanger using the hammer and nails. Repeat this step to attach the remaining trusses. Measure and mark the location of the roof trusses. If you decide on a shallow pitch porch roof use 2 by 6 foot rafters.

As with rafter style roofs toenailing is one of the most common ways of attaching a truss style roof to a wall plate. Some building codes around the country require the use of a hurricane tie also shown above to add extra reinforcement for holding down roof trusses in the event of very strong winds. Toenail a truss into the top of the wall plate by nailing through the sides of the bottom chord at a 30 degree angle. There are basically 2 different ways to attach a roof joist to the top wall plate.

Use screws to secure the rafter to the sill plate. The bracket is a better idea for the fact that is prevents any type of warping or rollover of the joist when it is under heavy load.