New Rafters Over Existing Roof

Original roof uninsulated rafter framing with board roof.

New rafters over existing roof.

How to tie a additions roof to existing roof roof designs to attach to existing home how to construct a roof from an exsisting shead how to attach a deck roof to existing roof how to add a roof over porch cost to tie into existing roof attache porch roof on house attach shed roof to house adding a roof to screened in porch adding a roof to existing. I felt pretty clever. To make the blind valleys we attached sleepers to the shed roof locating them by placing a 14 foot straightedge that is usually used for screeding concrete on top of the porch rafters to project the plane of the new porch roof over to the surface of the existing shed roof. Photograph 1 above left.

Unfortunately it s not an option for everyone. Installed new shingles over a fully adhered membrane and the house looked pretty darn good photograph 3. Roofing over your existing roof is not always possible. In the case of a lean to roof over an addition the existing rafters will have to be cut away to accommodate the addition and the shed roof will require support where.

Use premade roof trusses premade roofing trusses will be easier and take less time than installing a stick built roof. Got ourselves a kinda r 35 roof assembly when you factor in the thermal bridging. When you recover your old roof stays and the new roof gets installed on top. Sounds simple enough right.

Attaching below the ridge. There are a few situations where roofing over an existing roof just isn t possible. Installing a new roof over an existing one also called a layover or nailover is often possible although not always the best option a properly installed layover roof can look and function as well. The new rafters will take the load from the old rafters and the roof will remain intact.

Tip to increase the strength of your new and existing rafters and to help eliminate the chances of sideways movement consider installing a support board across the rafter endings on both sides of the roof.