Green Building Forum - Roof Repair Advice Tue, 19 Dec 2023 05:49:37 +0000 http://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 Roof Repair Advice http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17810&Focus=301220#Comment_301220 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17810&Focus=301220#Comment_301220 Mon, 17 Apr 2023 12:10:22 +0100 Mike1 Posted By: WillInAberdeenIt's had no underfelt for the last 95 years, so if there were to be problems with rain or snow ingress, they'll be visible by now?The difference is that 95 years ago they didn't have plasterboard ceilings, nor loft insulation, neither of which mix well with water.

Posted By: WillInAberdeenAdding modern felt without adding modern ventilation and vapour control
Using a breathable felt should minimise the risk.]]> Roof Repair Advice http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17810&Focus=301222#Comment_301222 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17810&Focus=301222#Comment_301222 Mon, 17 Apr 2023 13:47:20 +0100 Peter_in_Hungary Posted By: Mike1If you're not planning to stay then I'd re-roof now, using the same tiles, to make a future sale easier.
Re-roofing with the same tiles can result in anything up to 50% replacement tiles needed and you would be lucky to get away with anything less than 15% replacement needed. This assumes that matching tiles can be obtained and you are able to find a roofer who is prepared to take the time removing the original tiles carefully to minimise damage during removal.]]> Roof Repair Advice http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17810&Focus=301231#Comment_301231 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17810&Focus=301231#Comment_301231 Mon, 17 Apr 2023 21:33:06 +0100 Mike1 Posted By: Peter_in_HungaryRe-roofing with the same tiles can result in anything up to 50% replacement tiles needed and you would be lucky to get away with anything less than 15% replacement needed.Yes, you'll certainly need some to make up for breakages. There are normally nearby salvage yards who can supply locally used tiles, so it's usually not a problem, though you may end up with a close match on one side of the roof, rather than identical tiles on all slopes.

Worst case is you sell all your good tiles to a salvage yard and buy an alternative. But stick with clay, not concrete, as that's the weight the rafters will have been designed for.]]> Roof Repair Advice http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17810&Focus=301351#Comment_301351 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17810&Focus=301351#Comment_301351 Tue, 25 Apr 2023 20:31:57 +0100 billyb_1234 Posted By: djh
An extractor fan is better than nothing and it's only the cost of another piece of replacement glazing if you remove it later with an MVHR. So I wouldn't let that stop me putting a fan in.


I have seen that ceiling extractor fans are a possibility for first floor bathrooms, would an alternative possibility be to have a ceiling extractor fan installed which could then be ducted to an MVHR system when installed at a later date?]]> Roof Repair Advice http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17810&Focus=301352#Comment_301352 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17810&Focus=301352#Comment_301352 Tue, 25 Apr 2023 20:33:39 +0100 billyb_1234 Roof Repair Advice http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17810&Focus=301353#Comment_301353 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17810&Focus=301353#Comment_301353 Tue, 25 Apr 2023 20:55:29 +0100 Peter_in_Hungary Posted By: billyb_1234I have seen that ceiling extractor fans are a possibility for first floor bathrooms, would an alternative possibility be to have a ceiling extractor fan installed which could then be ducted to an MVHR system when installed at a later date?
MVHR systems have central fans (1 extract and 1 input) and the systems are balanced, adding an extract fan from the bathroom would IMO unbalance the ducting and cause problems.

I have installed ceiling extractor fans and they work well however I made a mistake with the first one, installing it straight up through the roof. The result was vapour condensed in the pipe and dripped down through the fan into the bathroom. The fix was to route the pipe horizontally UNDER the loft insulation and then out through the tiles. I also ensured that there was a downward slope to the outside so that any condensate ran out rather than back. I also use the type of fan that has a powered shutter on the inside to prevent drafts coming back.]]> Roof Repair Advice http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17810&Focus=301354#Comment_301354 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17810&Focus=301354#Comment_301354 Tue, 25 Apr 2023 22:06:23 +0100 djh Posted By: billyb_1234I have seen that ceiling extractor fans are a possibility for first floor bathrooms, would an alternative possibility be to have a ceiling extractor fan installed which could then be ducted to an MVHR system when installed at a later date?As PiH says, you can't have an extractor feeding into an MVHR duct (you don't need it). And I guess it will be more work to make good whatever outlet to the outside the ceiling extractor uses than it is to replace a window pane. But only you know for sure. A ceiling extractor is also likely to be a different diameter than an MVHR terminal so the hole in the ceiling would have to be altered too.]]> Roof Repair Advice http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17810&Focus=301374#Comment_301374 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17810&Focus=301374#Comment_301374 Thu, 27 Apr 2023 18:52:30 +0100 revor Posted By: Peter_in_HungaryThe result was vapour condensed in the pipe and dripped down through the fan into the bathroom.

You can get a condensate trap you fit in line with you vertical duct which collects the condensate and runs it to a 22mm spigot which you connect to you cistern overflow or other waste. It is quite a simple device it has a "gutter" inside the trap unit that collecte the condensate and diverts it to the 22 mm outlet.

Posted By: djhA ceiling extractor is also likely to be a different diameter than an MVHR terminal so the hole in the ceiling would have to be altered too.


You can get 100mm dia extract fans the hole which would be compatible with MVHR valves as long as you plan both fan and MVHR so that they are compatible. I know you can get 100mm and 150mm valves and also think 125mm are available also. So you should be able to use the same hole after removing the bathroom fan.]]>