How To Tie Roof Rafters Together

Starting two courses higher than where the new ridge meets the old roof unseal the shingle tabs a thin flat bar or a joint taping knife works well and pop the nails of the overlying course.

How to tie roof rafters together.

A gang nail is basically a thin piece of metal stamped out so that many metal tangs stick out into the wood about a 1 2 or so. Use pieces of lumber that are the same width as the rafter beams themselves and align them on either side of the rafter beams. Here s a formula i use to determine tie force. The truss companies use a gang nail to splice wood together pictured at left.

To scribe the roof angle on the ridge a length of stock is leveled over from the common rafters and a 2 by scrap is set against the sleepers. Remove siding from the house where the new roof will attach to expose. It is stamped into the wood at the factory with a hydrolic press. For additional support you can use ceiling joists which are lengths of lumber that run from the end of one rafter to another.

If you are framing a cathedral ceiling there are a couple ways to deal with the need for rafter ties. Using 16 penny nails secure the gusset plates to either side of the rafter beams. A collar tie is a length of lumber that attaches to each opposing rafter near the peak preventing your rafters from spreading apart. After the ridge is cut to the correct angle and length it s nailed into place.

Rafter ties or ceiling joists acting as rafter ties are required by code unless the house is designed so that the walls or a structural ridge beam carries the full load of the roof. Bore holes with a power drill and 1 2 inch bit through the ledger into the rafters or other sturdy frame elements. To do this you will use gusset plates on either side of the rafters. Collar ties also take the stress off of your wall plate and rafter joint.

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