Bed the end of each shingle in a 2 in wide ribbon of roofing cement placed 4 in.
Old roof new roof joined rafters bow.
This can cause roof caving water leakage.
Use your tape measure to record the distance of both rafter legs.
Use a circular saw to cut two sets of new rafters from the same size wood by the same dimensions.
If the roof was installed over another layer or several layers and it is older than 20 years chances are you need a new roof.
Repeat the process for the joist beneath your old roof rafter.
I e the original roof was a light wood shingle roof and the new replacement roof is a concrete tile roof weighing 5 or 10 times more than the original roof.
Strip the roofing from the old roof at the connection point to.
The old shingled roof was just removed and new shingles installed.
Sagging rafters can lead to serious problems with the entire roofing system.
Best solution is to tie the existing rafters at the wall plate level but this might not fit in with the floor levels and will not cure the bow in the roof just prevent future movement.
Shingle the addition roof letting the new shingles fold through the valley center and onto the old roof deck by at least 1 ft.
It also depends on whether the old roof was removed and you only have one layer of shingles and if it is properly ventilated.
Sagging rafters can be a serious and deadly in some cases problem in your roofing system.
If you notice that there is a visible dip in your roof chances are you have a problem with one or several rafters and you may soon be facing more issues like water leaks bowed out walls or your roof caving in on you.
This can be a serious problem in future if not treated at the right time.
Tie a new gable or hip roof to an existing gable or hip roof with valley rafters which perform the same function as ledgers.
Then the beam or roof may sag.
Arkins construction runs the bow rafter factory a manufacturer of standard and custom bow rafters since 1978 we combine our rafters and your ideas to build a contemporary design or reproduce an authentic colonial bow roof porch bridge dormer etc.
If you find your roof is sagging or a slight dip is visible then you are probably a victim of sagging roof rafters.
I think the roofers might have broken some of the 5 8ths inch plywood decking in places because there.
Up from the valley center.
To remove the bow will require the roof off.
If a roof has been re roofed with heavier roofing material than the original roof was engineered for.
It would also be very difficult to do with the roof on.
Re lay the shingles you removed from the existing roof.
Measure the dimensions of the old rafters beneath your roofing surface.