Align the blade of the utility knife with the notch you placed on the edge of the rolled roofing, roll the piece of roofing toward the utility knife and then pull the utility knife across the width of the rolled roofing with the handle of the knife resting against the side of the roll for a straight cut.
What do you cut roll roofing with?
Cut the rolled roofing to the right size using a razor knife. The rolled roofing should reach the chalk line when you lay it down and should stretch from 1 side of the roof to the other. You’ll need to use plenty of pressure with the razor knife to cut the rolled roofing material.
How do you cut a tar paper roll?
Begin your first row of tar paper with the bottom of the tar paper slightly hanging over the edge of the roof. Roll out the tar paper along the bottom edge of the roof. Cut it to fit your roof if necessary using sharp scissors or a utility knife.
Which side of roofing felt goes up?
Apply felt right up to the ridge or to no more than 4 inches below it. (Rather than cutting the felt horizontally to fit, overlap it by more than 4 inches.) Apply felt on the ridge so it overlaps at least 8 inches on each side.
Do you nail down roll roofing?
In most cases you can simply overlap the sheets at the ridge using roofing cement and nails for the final piece. However if the final piece does not come down at least 8 inches past the peak, cover the peak with a 16-inch-wide strip that is embedded in cement.
How long does rolled roofing last?
The average lifespan of asphalt roll roofing is 5 to 10 years.
Can you put new felt over old felt on a shed?
It’s best to tear down to the bare roof deck so you can also check for any decking damage. But you can also add another layer of felt on top of existing. This will add additional thickness to the roof, so be sure that fasteners (nails) are long enough to penetrate both layers.
Can you lay roofing felt vertically?
Since overlaps on felt are minimum 2 inches and side laps are minimum 4 inches…then overlapping your felt 4 inches in a vertical run could, therefore, be ok. … Most commodity felt won’t lay flat no matter what you do with it.
How much should roofing felt overlap?
Roofing felt is required to overlap 2 inches over the lower felt course. The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below. Therefore, a 2-inch overlap provides redundancy at the edges where the barrier is weakest.
Is roofing felt the same as tar paper?
Tar paper and roofing felt are somewhat similar in that they both shed water. It’s a generic term and sometimes used synonymously with roofing felt because they are used the same way. Tar paper is less wind and sun resistant than other underlayment systems.
Should I use 15 or 30 pound felt?
If your roof does not have a steep pitch, you can use #15. This weight of felt is a good economic choice if you have a standard roof. But if your roof has a steep pitch, #30 is a better option because it is thicker and tears less during installation. With #30 you get a thicker layer of underlayment and protection.
Is tar paper better than Tyvek?
Tar building paper has a major advantage of self-sealing around nails provided these are driven in straight. Tyvek House Wrap is a synthetic material made by Du Pont. It is permeable to water vapour, but impervious to water. … This make them somewhat more time-consuming to install compared to asphalt building paper.
Can you nail roofing felt?
Lay the first piece of felt
Use galvanised clout nails to nail the first sheet of felt onto the roof. We’d recommend nailing from the centre of the edge of the sheet and working outwards. Leave about 5cm between each nail, and ensure the sheet is pulled tight and sitting in line with the roof.
Does roofing felt need to be glued?
no need for adhesive. 90% of sheds have none. just get a good lap on the felt.
How many inches should each layer of roofing felt overlap?
Roofing felt is required to overlap 2 inches over the lower felt course. The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below. Therefore, a 2-inch overlap provides redundancy at the edges where the barrier is weakest.