But usually it just knocks granules off the surface.
How to find a rafters under shingle roof.
Go in the attic with a flashlight during or shortly after a heavy rain being careful not to step through the ceiling.
The other method i have used is to pull a section of vinyl soffet open and spot the rafter end then use a tape to measure off at the ridge.
Examine the roof decking and rafters in the attic above the spot where the ceiling is wet.
Position yourself on the roof between the apex and the bottom edge.
More granules fall off around the damaged spot and the bruise grows.
In many cases the rafters are exposed in.
Measure the width of the ridge beam.
Continue to chalk additional guidelines based on the width of the shingle through at least four courses rows across the roof.
Roof leak leakage of the roofing that has caused rot and partial collapse of the sheathing in the area of the leak is the 1 cause of a roof dip.
Then the asphalt shingles are fastened to the roof with roofing nails.
You may also find yourself dealing with mold and mildew problems.
Without adequate ventilation heat and moisture can cause damage to the framing insulation and the plywood sheathing that sits on top of the rafters.
In the absence of rain use a garden hose to thoroughly wet down the roof to create a manmade leak.
Measure the distance from the inside wall to the center of the first rafter inside the attic.
Starting at the bottom of the roof map out a guideline with chalk.
When a shingle loses its protective layer of granules uv rays from the sun begin to destroy it.
Roof deck is the roofing material that sits on top of the roof trusses.
When a large hailstone hits an asphalt shingle it can tear or even puncture the shingle.
If you re using a 2x4 it ll measure 1 5 inches 3 8 cm.
Verify spacing from the inside.
In most buildings the rafters will be square to the soffet edge by virtue of the sheathing panels being square.
Most roof decking is made from sheets of plywood.
Re shingle roof valleys install ice and water shield under shingles or install metal roof flashing and re shingle the valley roof nail leaks roof nail leaks can happen when roof nails have been loosened slightly from high winds or have simply pulled out over time.
Learn how to remove roof shingles here.
The ridge beam is the vertical piece of plywood which will form the peak of the gable and to which you ll fasten the rafters on either sides.
It often occurs next to a roof penetration such as a chimney or dormer or at the edge of the roof as in the photo above and is easily verified by checking the area in the attic.
The difficulty with scanning for rafters is that the asphalt shingles now create an irregular scanning surface that can result in false positives stud indication when a stud may not actually be present.
Use your chalk and tape measure to mark about 12 inches up on the roof for the first set of shingles.
