The love dada Posted January 13, 2021 Share Posted January 13, 2021 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 ? Link to comment Share on other sites More sharing options...
ToughButterCup Posted January 13, 2021 Share Posted January 13, 2021 Insurance, Band Aid, ignorance . In any of those roles, there's little or no point to it. Link to comment Share on other sites More sharing options...
Gone West Posted January 13, 2021 Share Posted January 13, 2021 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. Link to comment Share on other sites More sharing options...
joe90 Posted January 13, 2021 Share Posted January 13, 2021 About as good as a chocolate teapot IMO. ? Link to comment Share on other sites More sharing options...
The love dada Posted January 13, 2021 Author Share Posted January 13, 2021 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. Link to comment Share on other sites More sharing options...
DragsterDriver Posted April 22, 2021 Share Posted April 22, 2021 If it’s got felt now, it didn’t before and that was to catch the rain from broken slates. Link to comment Share on other sites More sharing options...
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