How to lay felt on a flat roof.
How to lay a mineral felt roof.
How to do it.
Install drip edge and install 9 cant strips of roll roofing material along the rake and eaves edges gable ends and lower roof edge such that the roofing strip overhangs the roof deck by 1 4 to 3 8.
Drip edges on the eaves any valley liners and all flashing should be installed before the tar paper is laid.
You can install metal valley flashing but it is common to.
Brush off loose mineral chippings once it is in place and apply the gutter drips so they are around 25mm away from the edge of the roof.
How to install roofing felt.
The first bituminous membrane sheet should then be positioned onto the roof.
Before laying roof felt all rotten decking must be replaced.
Nail the roofing strips parallel to the roof edge set in 1 and 8 from the roof edge with nails spaced 4 o c.
When this layer is started lay with the selvedge the edge of the sheet that doesn t have a mineral covering away from the roof edge.
Chalk lines should be snapped 33 5 8 above the eave line.
Secure metal flashing at the edges of the roof before primer is applied.
You can use your utility knife to cut a slit in the felt overhang at the very top of the roof and then fold the felt down there and nail securely at regular intervals along the gable.
Step 2 placing the felt.
After this lines should be snapped every 34 as you move up the roof.
Install drip edge flashings roofing felt and wsu if needed.
You will be looking for any decking that has rotted or bowed.
Once you ve done this you re done.
Step 1 prep work.
Remove any debris that may interfere with the installation process.
This will enable the felt to bond with it more easily.