Hire the best Roofing Expert

Fixing a roof leak

Results 1 to 15 of 15
  1. #1
    Senior Member
    Join Date
    May 2003
    Location
    Central Coast NSW
    Age
    64
    Posts
    450

    Default Fixing a roof leak

    Hi folks. I am worried about leaks in the roof. If you look at the attached photo, you can see that there is a sizeable gap where the last row of tiles lays over the flashing. Its OK on the left hand side, but on the right hand side I think it will leak when wind-driven rain comes in from the right direction. Unfortunately its not possible to bed down the tiles any better - the whole roof is a bit ramshackle. Is there some way to seal up the gap under the right-most 4 tiles - or at least reduce it. Thinking about silicon but can't really see how it would help.

    The flashing is turned up correctly. The whole roof is flatter then it looks in the photo - hence my concern.

    cheers
    Arron
    Attached Thumbnails Attached Thumbnails dscn6630.jpg  

  2. #2
    Senior Member Ian007's Avatar
    Join Date
    May 2004
    Location
    here
    Posts
    179

    Default

    Aaron,
    how far up under the bottom tiles does the flashing sheet go?

    It should extend up a couple of tiles if its a fairly flat roof.

    other than that its lots of ugly silicone or make some cement sheet sutouts to fit and then silicone them in. but having said that i bet there is a product already available for this very job, its just that ive never seen it and im on a roof most days for work.

    Cheers Ian
    Some People are like slinky's,
    They serve no purpose at all,
    but they put a smile on your face when you throw them down the stairs.

  3. #3
    Novice
    Join Date
    Apr 2005
    Location
    Sydney
    Posts
    48

    Default

    Hi,



    You can get a compressible bitumen foam type product which you can insert under the bottom edge of the tiles to stop blowback, that should help.

    If the flashing goes back far enough under the tiles and has a turn up then I don't see how there will be a problem. What's all that silicone for? The Trimdek sheets should be turned up at the back so should not leak there.

    Otherwise you could just stuff anything compressible to fill the gaps at the bottom edge of the tiles to stop blowback.

    How far under the tile does the flashing go?


    Regards

    Adrian

  4. #4
    Senior Member Ian007's Avatar
    Join Date
    May 2004
    Location
    here
    Posts
    179

    Default

    Quote Originally Posted by juliussee
    Hi,
    You can get a compressible bitumen foam type product which you can insert under the bottom edge of the tiles to stop blowback, that should help.
    can you get that stuff in that sort of profile or is it just in a staight roll??

    Cheers Ian
    Some People are like slinky's,
    They serve no purpose at all,
    but they put a smile on your face when you throw them down the stairs.

  5. #5
    Senior Member
    Join Date
    May 2003
    Location
    Central Coast NSW
    Age
    64
    Posts
    450

    Default

    Adrian, the silicone was put on by the roofer who layed the iron. He did a really lousy job (cost a lot, though) and wind-driven rain came through that joint and ruined the ceiling underneath. That was his attempt to fix it.

    The flashing goes under the tiles for about 2/3 the length of one tile.

    About this bitumen foam stuff, is it compatible with expansion/contraction and all that other mysterious stuff which happens on a roof ?

    thanks
    Arron

  6. #6
    Diamond Member Barry_White's Avatar
    Join Date
    Oct 2003
    Location
    Kentucky NSW near Tamworth, Australia
    Age
    84
    Posts
    1,196

    Default

    The bitumin impregnated foam is called Compraband. I dont think Compraband comes in profile but it does come in various thicknesses.

    Lysaght sell profiled foam infil strips for the various roof profiles but isn't impregnated but is made from high density foam that wont allow water past.

    You could use the compraband under the tiles and the profiled foam between the flashing and the roofing iron. They make the profile for both the top and the bottom of the roofing iron.
    Regards Bazza

    Skype Username: bazzabushy

    "Experience is a hard teacher because she gives the test first, the lesson afterwards."
    -Vernon Sanders Law

    The views expressed by the poster are general in nature and any advice should be taken in this vein. The poster accepts no responsibility if this advice is used. When undertaking any work personal professional advice should be sought from suitably qualified persons in the field of work being undertaken.


  7. #7
    Senior Member
    Join Date
    May 2003
    Location
    Central Coast NSW
    Age
    64
    Posts
    450

    Default

    Thanks guys. Can anyone suggest where I can buy some Compraband. Googling gives no hits, and I assume its not the sort of stuff that comes from a hardware stored.

    thanks
    Arron

  8. #8
    Diamond Member Barry_White's Avatar
    Join Date
    Oct 2003
    Location
    Kentucky NSW near Tamworth, Australia
    Age
    84
    Posts
    1,196

    Default

    Arron

    I'm sure I have seen it in Bunnings if not look for a good builders hardware store. You should be able to pick it up there. It may go by another name but Im sure a good builders hardware store should know it by the the name Compraband
    Regards Bazza

    Skype Username: bazzabushy

    "Experience is a hard teacher because she gives the test first, the lesson afterwards."
    -Vernon Sanders Law

    The views expressed by the poster are general in nature and any advice should be taken in this vein. The poster accepts no responsibility if this advice is used. When undertaking any work personal professional advice should be sought from suitably qualified persons in the field of work being undertaken.


  9. #9
    Senior Member
    Join Date
    May 2003
    Location
    Central Coast NSW
    Age
    64
    Posts
    450

    Default

    I bought some BIYSEAL impregnated foam strip at Bunnings today.

    thanks for the help
    Arron

  10. #10
    Registered
    Join Date
    Aug 2003
    Location
    .
    Posts
    1,836

    Default

    Ya could have used mortar also, like they used to use in the good ol' days..


    Al

  11. #11
    Senior Member Jacksin's Avatar
    Join Date
    Jan 2004
    Location
    South of Adelaide
    Posts
    312

    Default

    Looking at Aaron's pics, where someone has plastered silicone, I wonder if the leak is under the flashing because the iron is not 'weathered' at its end or the flashing does not cover the roofing iron far enough.
    Jack

  12. #12
    Senior Member
    Join Date
    May 2003
    Location
    Central Coast NSW
    Age
    64
    Posts
    450

    Default

    Jack, there was a leak from between the flashing and the iron - just as you suspect. That was what damaged the ceiling in the kitchen (did I mention that). The iron was not turned up at the end properly, and the gap between iron and flashing was too large as the flashing was not fixed down neatly. And this from a professional roofer !!!!!

    This roofer was the second one to have a go. The first one was actually a builder, not a roofer. There had been a small leak for a long time, and he did a nice looking job but actually made it many times worse - so the next time it rained the water came bucketting in and ruined the ceiling in the sunroom.

    Anyway, I think that leak is fixed now, and I am concentrating now on the gap between the flashing and the tiles, as a possible source of future leaks. The gap just seems too large to me.

    Arron

  13. #13
    dubadubadubaduba.... TassieKiwi's Avatar
    Join Date
    Jun 2004
    Location
    Port Sorell, TAS
    Age
    57
    Posts
    109

    Default

    Two things. Rain driven by wind presssure will travel alarming distances in a house (DAMHIK), like 300mm vertically:eek: so it would blow right up yer spout there. Second - do not rely on silicon alone for waterproffing - it wil lfail in time.

    You could get the dude back to do it properly, install a longer piece of flashing over the too short one and/or use that 'space foam' stuff, or good ol mortar to block the holes. IFfyou can stop the movement of air then you're right.
    The only way to get rid of a [Domino] temptation is to yield to it. Oscar Wilde

    .....so go4it people!

  14. #14
    ......say what? martrix's Avatar
    Join Date
    Feb 2005
    Location
    Melbourne, Australia
    Age
    44
    Posts
    160

    Default

    @@@@!

    Just had a big storm in the Eltham area with serious rain. Haven't seen rain that heavy for a long time and it looks like its gearing up for another dump looking at the BOM radar.

    Water got into the cupboard where I store my veneer stock . Got some Quilt maple and some burl .. Hopefully it doesn't stain it too bad, and looks like I will have a date with some glycerin and the vacuum press .

    Note too self....fix the effing flashing and clean out the gutters.
    I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.
    Albert Einstein

  15. #15
    PLU.MBR.BL.DR. bricks's Avatar
    Join Date
    Jan 2007
    Location
    Adelaide - West
    Age
    41
    Posts
    643

    Default Pdf's for you.

    IMO silicone should not be relied on to seal a roof.

    Here's some links to what i believe are the best quality manuals on roofing for tiles and steel.
    http://www.bluescopesteel.com.au/ind...F600C04FCF6B8F
    http://www.hamiltonroofing.com.au/glossary.htm
    http://www.harmonyrooftiles.com.au/m...oreword.html&0
    http://www.tufftile.com.au/technical.html

    Im not real good at internet related stuff so i cant navigate you to exactly what you want. You need to go to the sites and download the available pdf's. I finished downloading the bluescope lysaght manuals this arvo and its 954 pages on its own, but they have broken it down into sections, so you dont download it all.( you want section 11, flashing) there are diagrams and pictures aswell.

    Id probably get the local authority to look at it if you can be bothered, that sounds like a poor job to me.

    Because you say your roof is flat maybe run the flashing further under the tiles than recommended, flat roofs IMO are harder to seal because gravity doesnt help you as much.
    If you dont play it, it's not an instrument!

Similar Threads

  1. air conditioner gas leak
    By ceagle in forum Heating & Cooling
    Replies: 3
    Last Post: 1st Oct 2007, 08:03 PM
  2. HELP - Sealing Roof Flashing Leak
    By echnidna in forum Roofing
    Replies: 13
    Last Post: 5th Jul 2007, 10:58 PM
  3. Another crazy leak
    By Burnsy in forum Structural Renovation
    Replies: 9
    Last Post: 4th May 2007, 12:34 PM
  4. Gas leak?
    By inferno6688 in forum Plumbing
    Replies: 7
    Last Post: 12th Jul 2006, 07:21 PM
  5. Rain leak
    By hardwoodjoint in forum Roofing
    Replies: 2
    Last Post: 28th Jul 2005, 12:32 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •