Roofing felt prevents the deck from being exposed to the elements before or while the shingles are being applied.
How to put tar paper on a roof.
Roof felt also known as tar paper is a waterproof fiberglass product.
Lay the first course of tar paper lengthwise on the roof so one edge is covering the drip edge nailed to the roof.
The idea is to make sure water that falls on the roof drips down from paper to paper and off the roof rather than up under the tar paper potentially damaging the roof s wooden structure.
Staple it to the plywood with a staple gun placing the staples at 6 to 8 inch intervals along the edges and in the middle of the paper.
Unroll the paper on the roof and cut it to the correct length with a utility knife.
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.
Whatever your reason for attaching roof felt you should only do it after cutting your pieces to.
As you work the paper can be tacked down in the center so it won t blow away.
It improves look and uniformity because your roof deck might not lie perfectly straight or flat a layer of roof paper gives an even uniform surface upon which you can install your shingles.
The roofing felt should be applied in layers that overlap.
How to install roofing tar paper.
Place a final piece of tar paper over the top of the roof attaching it so it overlaps the tar paper on both sides of the roof.
It is used for temporary roofing for weatherproofing and as an underlayment under shingles or other permanent roofing materials.