I have an original rear 2nd floor extension with a pitched roof which joins the main roof. The pitch of each roof is different, with the extension roof at a much shallower angle. All my neighbours have a similar construction. Additionally, the way the roof joins the neighbour creates a slight dip either side of the party wall. This is difficult to fix without reducing the slope even further. Over the years the poor slope has caused numerous problems with water rising up the tiles either by wind or capillary action, even after replacing all the felt and tiles 4 years ago. Some neighbours have had similar issues.
The latest roofer has suggested we replace the lower roof with felt and cover as though it were a flat roof.
To be honest I'd thought of this myself but it sounded very odd. However, when it was suggested I liked the idea. Could anyone tell me what they think are the main pitfalls of such a solution. Obviously felt won't last as long as the current slate tiles but the cost to replace the felt every 15 years or so would be a lot less than the cost of maintaining the current roof. There's also the issue with how it joins one neighbour who currently shares some of my tiles. It might also look odd and affect resale value.
The latest roofer has suggested we replace the lower roof with felt and cover as though it were a flat roof.
To be honest I'd thought of this myself but it sounded very odd. However, when it was suggested I liked the idea. Could anyone tell me what they think are the main pitfalls of such a solution. Obviously felt won't last as long as the current slate tiles but the cost to replace the felt every 15 years or so would be a lot less than the cost of maintaining the current roof. There's also the issue with how it joins one neighbour who currently shares some of my tiles. It might also look odd and affect resale value.