Cover the roof above the underlayment with roofing felt paper.
How to apply roofing felt paper.
Apply roofing cement and secure the second layer to the roof.
10 roof problems and what to do about them.
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.
All drip edges along roof eaves valley liners and flashing need to be installed before the roof paper layer is laid down.
As you work the paper can be tacked down in the center so it won t blow away.
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.
Install pieces in the correct order and make cuts carefully so any moisture can travel downward at all points without slipping under the wrap.
Use a 4 inch 10 cm paintbrush or a roller to apply the paint or primer.
As mentioned above place the first 6 inches 15 cm of the second layer on top of the first layer.
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.
Get your trowel and another scoop of cement and apply it on the roof below the second chalk line.
Many rolls are pre striped allowing installers to keep a straight line when applying roll strips to the roof side by side.
Many builders use standard 15 pound roofing felt.
Laying the felt the roofing felt should be applied in layers that overlap.
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.
Felt labeled astm 15 meets specific standards and is the norm in many areas.
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.
Then unroll the felt and straighten out the row before you add more staples.
It is commonly called 15lb paper.
Felt or building paper must be applied to walls properly to be effective.
Start the roof felt at one bottom corner of the roof.
Once the cement is spread across the roof it s time to place the second layer down.
Begin at the bottom working in horizontal lines and gradually moving upward.
Drag it gently from one end of the roof to the other east to west or west to east.
To start each course drive a dozen staples grouped close together.
