Poch Roof Sill Joist

We show you the steps involved and calculations required for buildng a roof for your porch or constructing one over your deck or patio.

Poch roof sill joist.

Joist hangers can hang rafters from a ledger but for sloping rafters notch them or use special rafter hangers. Brace between joists using wood the same dimension as the joist. The sill plate usually a treated 2 by 8 board rests flat on top of the foundation and the ledger board usually a 2 by 10 board rests upright on top of the sill plate in an upright position. We show you how both a typical rafter style porch and truss roof area constructed.

Then force the rafter s tip snugly against the house wall. When the sagging joists are level apply a generous bead of construction adhesive to the existing joist. Joist hangers can help you mount each rafter to the house. Driving 16d common nails in old hard wood is difficult.

For a 20 foot porch roof you will then need to have five different temporary supports. Cut the wood in 16 inch or 24 inch lengths and set on the sill plate between the floor joists against the rim joist. Sometimes joists are notched at the end where they bear on a wall or sill. Then attach the sister joist using three 16d common nails driven every 16 in.

This article series discuss best porch deck construction practices including choice of framing materials decking or flooring choices installation how to select and use deck and porch structural and flooring fasteners actual deck porch framing construction details connections deck joist beam span tables how to build leak proof. 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. If the cut outs are too large or in the wrong location the joist can be weakened and unable to support the load it was designed for. Where the house connects with the foundation is known as the sill plate.

How to block water from going under a sill plate. Ledger board and sill plates are installed onto a foundation as part of a floor system of a building. But it s usually best to run the sister joist over the entire span. The porch roof may match the pitch of your home or have a more shallow roof pitch.

The positioning of your rafters will depend on the pitch of the porch roof. If you are going to be supporting a porch roof that runs the front side of your home you can use simple 2 x 4 lumber. If you decide on a shallow pitch porch roof use 2 by 6 foot rafters. Use screws to secure the rafter to the sill plate.

You should have a spacing between each support of 4 feet plus two in each corner.