For example if your slates are being installed with an exposure of 6 inches and you are installing 1x4 skip sheathing with a width of 3 5 inches then you ll have a gap of 2 5 inches between each course of sheathing.
Underlayment for slate roofing.
Assist in fire resistance rating of a slate roof as class a.
Also the textured fabric lets steep sloppy walkability.
I have two roof estimates for underlayment replacement of the entire tile roof which at this time has the builder s original paper from 1989 when i purchased the house new.
1 re felt with 2 layers of sbs 40 lb.
The underlayment also has a slip proof polymer to the bottom.
Some believe that is is the most important part of the roof when in fact it s the least important.
Roof felt 2 nail 2 layers tu 35 or malarkey modified sheets.
Item 169827 model 5003002.
Some should not be left exposed longer than 30.
Some key functions of a roof underlayment.
Cushions the slate when nailed into the roof deck.
Two different underlayment suggestions very confusing.
The underlayment on a slate roof is often misunderstood.
Good surface for chalk lines when laying out the courses.
First layer of waterproofing and will provide extra protection for leaks should slates become damaged missing over time or poor installation.
Any professional can measure and nail it all over the surface within a few hours.
Protects the roof and building until the slate is installed.