Leave the next course of shingles intact by carefully removing the second set of four nails.
Fix a board in the edge of my house roof.
Put one nail in where each.
It is possible to get in underneath the shingles on the bottom few rows and remove the nails with diagonal cutters then slip in a strip of same thickness roof sheathing adhered to the rafters with construction adhesive or extra length shingle nails with dripedge flashing put over it placed under the water barrier as applicable.
Waterlogged boards will often be soggy and prone to crumbling.
Nail down the drip edge beneath the shingles.
To locate rotted areas of the roof s edge gently lift up shingles with a pry bar or taping knife.
During a reroof start at the peak of the roof and remove all shingles prying them up with a pitchfork working your way down the roof.
Grab the exposed edge of the board and give it a sharp tug downward to dislodge it.
Pull up the felt paper underneath the shingles.
This lets any water that gets on the roof run down the underlayment and over the drip edge.
It should overlap another piece of ice and water barrier laid below all the way down to the roof edge.
Then reshingle sliding metal step flashing behind the fascia board the trim behind the gutter.
Pick up the edge of the shingles that the drip edge lies beneath and drive in a galvanized roofing nail with a hammer.
If perfectly centered each of the two adjoining board ends gets at most a inch bearing on the end of the roof truss or rafter.
Working your way up the roof expose all of the rotted wood.
In most cases if the shingles go past the drip edge about 3 4 of an inch the shingle edge will break the surface tension unless your roof has a shallow pitch then the water will reach the drip edge and if drip edge is tight to the facia board it will run down the fascia so as added insurance leave space between the fascia and drip edge.
Lift courses or shingles from the asphalt adhesive strip on the course beneath it to inspect the.
If at all possible never nail a fascia board near the edge of the end grain.
Like the fascia a decaying soffit should be soft enough to pull out manually.
This should cover the most leak prone areas.
Don t be surprised if the soffit breaks apart while you re attempting to pull it free.
Find and fix a leaking roof.