The love dada 0 Posted January 13 My loft in a 1920s semi-detached house has the conventional layer of felt over the rafters and under the tiles but in some areas also has a second layer of felt loosly tacked to the underside of the rafters. Much of it is coming down as can be seen in the attached photo. What is the function of this second layer of felt ? Share this post Link to post Share on other sites
ToughButterCup 2,054 Posted January 13 Insurance, Band Aid, ignorance . In any of those roles, there's little or no point to it. Share this post Link to post Share on other sites
PeterStarck 1,066 Posted January 13 The second layer may have been fitted first to reduce draughts then at a later stage it was reroofed and a proper layer of felt was laid under the tiles. Share this post Link to post Share on other sites
joe90 1,833 Posted January 13 About as good as a chocolate teapot IMO. 🤣 Share this post Link to post Share on other sites
The love dada 0 Posted January 13 I'm very glad to see these opinions because I took a fair bit out from the upper portion of the roof to get better access when fitting rockwool loft insulation on top of that granular stuff you can see in the pic. Actually the second layer made it slightly easier to fit because I could go right up to it without fear of blocking off ventilation. When I peer down between the two layers there is still an air gap. Thanks all. Share this post Link to post Share on other sites
