The solution is to remove all three layers of roofing and start fresh directly on the roof sheathing.
Fixing roof sheathing root.
Eight foot 1 2 inch thick plywood is standard sheathing material.
Remove the shingles over the area of the rotted roof decking identified previously.
Moderate repairs are likely fixing and or sealing fixtures on the roof and replacing shingles and flashing around these objects.
Begin by removing the shingles down to the wood sheathing and slip a strip of adhesive ice and water barrier available where roofing repair products are sold under the soffit main roof joint.
Asphalt shingles cost roughly 500 to 1 000 to replace or repair 10 by 10 square feet section.
First off the uppermost roofing shingles are likely to be uneven and inadequately anchored to the roof sheathing.
Secondly the combined weight of the roofing material can exceed the strength of the roof framing.
Metal roofs cost on average 500 to 1 500 to repair improper installation fix loose seams or address any damaged fasteners.
You would have to go up into the roof and cut it off there.
Put in the extension and then band aid the side s to hold it in place and give it some rigidity up under the unseen sheathing.
Measure the opening of the section of roof to be shingled cut the plywood to size and nail to roof rafters.
Stagger the sheathing in a brick pattern for extra strength.
A short scab on the end of a rafter you could used a structural screw from grk and counterbore to make a secure connection.
How to fix it.
Depending on how the roofs join you may have to cut a slot to work it in far enough.
Fasteners for asphalt shingles shall be galvanized steel stainless steel aluminum or copper roofing nails minimum 12 gage 0 105 inch 3 mm shank with a minimum 3 8 inch diameter 9 5 mm head complying with astm f1667 of a length to penetrate through the roofing materials and not less than 3 4 inch 19 1 mm into the roof sheathing.
Cut a piece of 1 2 inch plywood that will cover the area.
Depending on how the roofs join you may have to cut a slot to work it in far enough.
How to install roof sheathing.
Wood shakes or cedar shingles repair will.
Because driving nails up into the sheathing material will make things worse glue a piece of 1 inch rigid styrofoam to your piece of plywood.
The roof s sheathing helps to keep the roof trusses or rafters properly spaced.
After cleaning the debris and reframing the roof lay down a base sheathing.
Begin by removing the shingles down to the wood sheathing and slip a strip of adhesive ice and water barrier available where roofing repair products are sold under the soffit main roof joint.
