Over time roof rafters can wear crack or rot and replacements may be in order.
Replace cracked roof support.
Clean the surface of the tile with a rag soaked.
This will give some added strength and take care of any cracks in the wood itself.
The first thing you need to do is to assess the damage.
At some point the roof drain clogged the roof turned into a swimming pool and this ridge board beam cracked tore in the middle.
Apply it directly on top of the cracked area and push it down into the crack with your finger or a putty knife thus capping the void and the leak.
Rafter can usually be repaired or replaced from underneath without excess trouble broken ridge pole would normally be spliced with metal repair plates or sistered unless rotten because not feasible to replace it with roof in place to replace economically requires roof be opened up at the ridge at least.
My garage has a 17 2x8 ridge beam.
A severely arched bulged cracked or sagging floor joist can only get worse over time eventually deforming the floor above it.
Place the temporary beam with the old beam uncovered the temporary beam can be placed on the braces you ve made images 1 and 2.
Correcting a problem joist is an easy repair and makes a big difference in your finished floor.
Things needed stepladder or attic stairs attic light or work light measuring tape framing lumber two by six or larger circular saw 16d framing nails hammer power drill with 1 4 inch drill bit 1 4 inch by 4 inch carriage bolts with washers and nuts socket and ratchet.
Move the braces into place on top of the bottle jacks image 3 then raise them till they support the roof.
Cut two pieces of lumber 4 feet long for the first phase of the repair.
Drill holes in angle iron to keep the rafter from buckling again you will need to secure it with a piece of 1 2 inch angle iron.
These will serve as patches to be installed on each side of the broken roof truss.
Each side of the iron should be four inches wide with the entire piece being at least two feet long.
The roof is a v lowest in the center with 2x4 rafters nailed to the sides of this ridge piece.
This will hold the weight of the porch roof while replacing the beam.