Roofing underlayment or felt is usually required for the ul fire rating to apply since shingles are usually tested with underlayment.
Sand roofing felt underlay.
Fit felt around vent pipes or other protrusions by cutting it with a utility knife and fastening around the bottom of the vent.
Lay it over metal flashing edges around vents and pipes.
Roofing underlayment or felt protects the roofing from any resins that bleed out of the sheathing.
Item 656632 model 0903000.
Felt roof deck protection.
Roof pro torch on sand underlay l 8m w 1m product code 5060382231480.
Roofing underlayment or felt helps prevent unevenness in the roof sheathing from telegraphing through the shingles.
Add an extra layer of protection between your shingles and roof deck with this 30 216 sq.
This felt will help prevent damage to your roof from wind driven rain and water from other sources.
Gaf shingle mate 36 in x 144 ft 400 sq ft felt roof underlayment.
Types of roofing felt traditional bitumen sarking felt is the cheapest option for roofing underlay and is readily available.
It is slightly different from flat roofing felt as it includes a strong woven base but it can become brittle over time and can rot into the guttering where it has been exposed to sunlight.