Home  5  Books  5  GBEzine  5  News  5  HelpDesk  5  Register  5  GreenBuilding.co.uk
Not signed in (Sign In)

Categories



Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.
Buy individually or both books together. Delivery is free!


powered by Surfing Waves




Vanilla 1.0.3 is a product of Lussumo. More Information: Documentation, Community Support.

Welcome to new Forum Visitors
 Join the forum now and benefit from discussions with thousands of other green building fans and discounts on Green Building Press publications: Apply now.




Fundamentals: Roof Repair Advice

Bottom of Page

31 to 38 of 38

  1. <
  2. 1
  3. 2
  4. >
    • CommentAuthorMike1
    • CommentTimeApr 17th 2023 edited
     
    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.
  2.  
    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.
    • CommentAuthorMike1
    • CommentTimeApr 17th 2023 edited
     
    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.
  4.  
    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?
  5.  
    Will keep comments about roof tiles in mind, thanks all. I'm planning to spend time checking out the roof on the bank holiday next Monday so will be able to look further into the condition of it.
  6.  
    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.
    •  
      CommentAuthordjh
    • CommentTimeApr 25th 2023
     
    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.
    • CommentAuthorrevor
    • CommentTimeApr 27th 2023
     
    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.

31 to 38 of 38

  1. <
  2. 1
  3. 2
  4. >
Add your comments

    Username Password
  • Format comments as
 
Back to Discussions Top of Page
   
The Ecobuilding Buzz
Site Map    |   Home    |   View Cart    |   Pressroom   |   Business   |   Links   
Logout    

© Green Building Press