Atlas roofing provides a complete selection of roofing felt underlayment.
Roofing felt paper overlap.
The last layer should go over both sides of the roof overlapping both side covered in felt.
Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest.
The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below.
Adjacent pieces of drip edge should overlap at least 2 inches 51 mm.
Work up the roof to the peak and fold felt over the top overlapping at least 3 inches and fasten it on both sides.
The vertical leg of the drip edge should be at least 1 5 inches wide and extend at least 0 25 inches below the sheathing.
Felt roof underlayment 30 saturated roof felt.
Roofing felt is required to overlap 2 inches over the lower felt course.
As you work the paper can be tacked down in the center so it won t blow away.
Tip the roof ridge is the horizontal top edge which may or may not be present on a hip roof.
Install the roofing felt on all roof sides extending it over the ridge of the roof and overlapping 8 inches there just as you did on the sides.
For a flat roof the same applies start at the lower end first working to the higher end and this should resemble tiles on a roof.
Do the other side of the roof the same way also with an overlap at the peak.
Although tar paper has traditionally been the standard undercoating for shingles as of 2010 synthetics are becoming more popular as an underlayment.
Installing roofing paper or felt is an essential element to construct a waterproof roofing system.
The drip edge should extend at least 2 inches on the roof.
Hence this is why tiles are fitted on top of each other rather than sideways.
30 saturated felt underlayment is specified for use as an underlayment between the roof deck and the shingles.
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.
Remember to always overlap roof paper at valley ridges and hips by six inches.
Roofing felt or tar paper is infused with a petroleum based solution to provide an additional layer of roof protection under shingles.
The roofing felt should be applied in layers that overlap.
