You will follow the same process as in step 2 for the last layer.
How to lay a felt shingle roof.
Snap a horizontal chalk line over the starting row to use as a guide.
Overlap each row at least 3 to 4 inches.
Apply another layer of adhesive to the top for maximum waterproofing.
Cut six inches off the length of the first starter shingle nailed on then use the rest of them full size.
Using your staple gun secure the felt to the roof.
Start at the bottom of the roofline and work up so any water that gets through the roofing material will shed down the tar paper and will not go under it.
You can cover the surface of the felt with gravel for added strength.
Cover the edges of the roof with strips of felt before laying out the final layer.
3 shingles make up each 1 metre shingle strip.
If you live in an area with inclement weather you should consider using a special ice and water protector.
First row starting at the bottom edge of the roof prepare a starter strip to go along the eaves by cutting the flaps shingles off the strip.
Ask this old house general contractor tom silva reveals the best ways to secure shingles to a roof.
Start by laying asphalt felt or other underlayment over the roof.
Start the roof felt at one bottom corner of the roof.
The shingles are fixed to the roof boards or insulation boards if you have chosen the roof insulation option with clout nails.
The roofing felt should be applied in layers that overlap.
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Tack it in place at the corner with the end flush with the end of the roof and the bottom edge of the roll right along the bottom of the roof.