How To Install A Roof Over Existing Shingles
![Tying A New Roof Into An Old One Fine Homebuilding Question Answer Building A House Building An Addition Roof](https://i.pinimg.com/736x/db/71/1c/db711cb407980d114d27ff2103ea1b3a.jpg)
Some roofers install a layer of waterproof shingle underlayment wsu over the existing shingles at the eave end as would be done for a roof laid on bare sheathing.
How to install a roof over existing shingles.
Source : pinterest.com