As you work the paper can be tacked down in the center so it won t blow away.
How to apply roofing felt paper.
Felt labeled astm 15 meets specific standards and is the norm in many areas.
It is commonly called 15lb paper.
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.
Some roofers prefer to attach felt underlayment with 1 inch roofing nails or special nails with plastic washers but most codes allow staples which are easier to drive.
Laying the felt the roofing felt should be applied in layers that overlap.
The most common size width for rolls of roofing paper is 36 inches.
Also called roof felt or builder s felt overlapped tar paper creates a water barrier that is your home s last line of defense against the elements if your shingles are damaged by wind hail or.
Start the roof felt at one bottom corner of the roof.
Then unroll the felt and straighten out the row before you add more staples.
Once the cement is spread across the roof it s time to place the second layer down.
Roofing felt is comprised of a base made from natural materials such as wood cellulose or synthetic ones such as fiberglass or polyester and then coated or saturated with a protective coating such as bitumen asphalt which repels water but still allows the product to breathe.
Apply waterproof paint or primer to promote felt attachment.
Apply roofing cement and secure the second layer to the roof.
Felt or building paper must be applied to walls properly to be effective.
Many rolls are pre striped allowing installers to keep a straight line when applying roll strips to the roof side by side.
Begin at the bottom working in horizontal lines and gradually moving upward.
All drip edges along roof eaves valley liners and flashing need to be installed before the roof paper layer is laid down.
As mentioned above place the first 6 inches 15 cm of the second layer on top of the first layer.
Many builders use standard 15 pound roofing felt.
Get your trowel and another scoop of cement and apply it on the roof below the second chalk line.
To start each course drive a dozen staples grouped close together.
Cover the roof above the underlayment with roofing felt paper.
Before applying roofing you ll need to cover the sheathing with roofing felt also often called tar paper most local codes call for using 30 pound felt.
Use a 4 inch 10 cm paintbrush or a roller to apply the paint or primer.
Install pieces in the correct order and make cuts carefully so any moisture can travel downward at all points without slipping under the wrap.
