Overlap Roofing Felt By

Atlas roofing provides a complete selection of roofing felt underlayment.

Overlap roofing felt by.

The bottom course of felt on a roof called sarking felt ensures that all of the rainwater is correctly channeled into the gutter by protecting the eaves from any wind driven rain. Work up the roof to the peak and fold felt over the top overlapping at least 3 inches and fasten it on both sides. Follow the 10 steps below in order to felt a flat roof. Keep in mind that if you are looking for a more permanent type of roof coverage you might consider using roll roofing which is specially designed with a mineral coating to resist bad weather.

The roof felts are asphalt saturated and are manufactured with a high grade organic mat. This guide will use the more durable 30 roofing felt although you can use 15 felt. 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. 30 saturated felt underlayment is specified for use as an underlayment between the roof deck and the shingles.

Bitumen in terms of materials please note that there are several different weights for the roofing felt. The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below. 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. Roof felt adhesive e g.

The roofing felt should be applied in layers that overlap. Step by step guide for felting a flat roof. Ideal for an apex flat or pent roof shed felt and roofing membrane are durable and perfect for a newly built structure or to re cover existing roofing material. If the roof felt tears cut a piece of felt that is large enough to cover the tear with lots of overlap slip the top under the next layer above it and nail it into place.

Tip the roof ridge is the horizontal top edge which may or may not be present on a hip roof. Trapped behind the guttering or if it is badly weathered it needs to be replaced. As you work the paper can be tacked down in the center so it won t blow away. Roofing felt is essential to ensure your outbuilding is ready for all weathers by providing a waterproof cover to the building s roof.

Do the other side of the roof the same way also with an overlap at the peak. The last layer should go over both sides of the roof overlapping both side covered in felt. 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. Hence this is why tiles are fitted on top of each other rather than sideways.

Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest.