I'm in the process of purchasing a new house, and took a few photos of the roof rafters/felt. Access is difficult so I couldn't really get up close, but it looks to me like roofing felt has been tacked on between the rafters with battens from the inside, rather than being laid above the rafters. It's a Victorian terrace house - no obvious signs of damp or ingress, but I'm concerned this could be hiding something else? Perhaps this is the only felt on the roof, but I've never seen it tacked on like this before.
Any experienced advice would be appreciated on this.
[img] http://img52.imageshack.us/img52/8350/img0473.jpg [/img]
[img] http://img52.imageshack.us/img52/7329/img0472.jpg [/img]