To prepare the tabs and lay the starter course shorten the first starter shingle by 6 inches or about a half of one tab.
How to starter course shingles over existing 3 tab roof.
Every roof has to start somewhere and that somewhere is at the appropriately named starter shingle also called starter strip.
Damaged shingles should be removed to check the decking for problems.
Starter shingles are the initial shingle products installed on the roof just before the first course of the finish shingles which will comprise the visible parts of the roof.
Damaged decking will need to be repaired before you can install any new shingles.
Attach with nails along the top edge of the strip.
If you are using a power nailer drive nails by squeezing the trigger and bouncing the nailer s tip onto the shingle.
Step 3 cover the old shingles.
To attach a 3 tab shingle align it with the layout line and drive nails 1 2 inch above the cutout slots including the half slots at each side.
Rip cut the starter strip or starter pieces so that they butt up against the second course of existing shingles and are even with the front edge of the existing roofing.
Place the top of each starter shingle firmly against.
Cut and install shingles rip cut the shingles for the first course so they butt up against the third course of existing shingles and are even with the front edge of the starter course.
If laying three tab shingles over three tab shingles it is important to nest the new shingles against the old to create a flat surface as friedman elaborates just below.
The felt should be secured every six inches with nails or staples.
Following the manufacturer s directions.
Their tab slots should not line up with the tab slots of the starter course if there are any.
Drive a nail at one end first then drive the others.
Place the glue strip at and all along the drip edge and the rake edges as well.
Using a utility knife cut them off at the bottom of the adhesive strip.
Use a starter strip or cut pieces for a starter course.
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Cut and install shingles.
Install a layer of roofing felt over the roof before you begin installing the new shingles.
If you are making your own starter shingles cut the tabs off for the starter course bottom row of shingles.
To begin installing the first shingles on your roof cut off the three tabs on the shingle.
This should leave you with about 1 2 of the shingle left.