Hire the best Roofing Expert

Kit garage, roof insulation blanket, Do I need to do anything special with the ends.

Results 1 to 16 of 16
  1. #1
    Member
    Join Date
    May 2008
    Location
    Melbourne
    Posts
    59

    Default Kit garage, roof insulation blanket, Do I need to do anything special with the ends.

    Hi,

    I'm erecting a kit garage, and opted for an insulation blanket for the roof (foil and insul together.

    Where the insulation blanket finishes, when it meets the wall, just above the gutter.

    How is this end finished so the insulation is no exposed to the outside where water could get in.

    Thanks in advacne

  2. #2
    7K Club Member
    Join Date
    Jun 2010
    Location
    Geelong
    Posts
    7,778

    Default

    Nothing special I think. Just needs to finish over the gutter but without risk of soaking in water so it doesn't wick up under the roofing.

  3. #3
    2K Club Member
    Join Date
    Dec 2009
    Location
    Melbourne
    Posts
    2,580

    Default

    At the gutters, you need to fold it up and under the roof so there is no chance of capillary action from water.

    The anticon installation guide (Bradford) talks about this.
    Bradford specifically says not to allow the anticon to drape into the gutter but to finish in line with the fascia.

    http://www.comfortsmart.com.au/~/med...ion-Guide.ashx See 3.5 and 4.6:

  4. #4
    7K Club Member
    Join Date
    Jun 2010
    Location
    Geelong
    Posts
    7,778

    Default

    Link is broken for me

  5. #5
    Member
    Join Date
    May 2008
    Location
    Melbourne
    Posts
    59

    Default

    Link is also broken for myself. Could you post doc if its ok.

    I was thinking of folding the end of the foil/sarking layer back on its self so the bat is not as exposed to water.

  6. #6
    Member
    Join Date
    May 2008
    Location
    Melbourne
    Posts
    59

    Default

    Found an installer who recommends not to fold back as this will inhibit the blankets ability to drain if moisture gets in from leaks or condensation.

    SO just as joynz said foil just over the lip of the facia, then cut back insulation a bit.

  7. #7
    2K Club Member
    Join Date
    Oct 2005
    Location
    newcastle
    Posts
    2,184

    Default

    1st point - blanket should have an edge that doesn't have blanket attached - usually 100mm wide or so, and you should be able to get this to lap over the fascia which is then hidden by the gutter.

    2. A gutter apron isn't a bad idea, then you can terminate the blanket edge half way down the gutter apron with some insulation tape to the apron - I think this is the method that's required in bushfire zones to protect the roof space from embers

  8. #8
    7K Club Member
    Join Date
    Jun 2010
    Location
    Geelong
    Posts
    7,778

    Default

    Quote Originally Posted by pharmaboy2 View Post
    1st point - blanket should have an edge that doesn't have blanket attached - usually 100mm wide or so, and you should be able to get this to lap over the fascia which is then hidden by the gutter.
    My installer laid the blanket in the direction of the sheets, therefore cutting the blanket at the facia/gutter and no edge without the bulk fill. I believed the edge with no bulk was for overlap so you don't double up on the bulk

  9. #9
    2K Club Member
    Join Date
    Dec 2009
    Location
    Melbourne
    Posts
    2,580

    Default

    You can remove some of the fibreglass at the end of the run of anticon to expose the foil and fold that up.

    The Bradford site had a diagram showing this - but with their rebranding it seems to have disappeared.

    Alternatively, just cut it off in line with the fascia ensuring it can't droop into the gutter. Bradford gave both options in that link that is no longer working - but I prefer the idea of folding it up and over so the fibre is really protected from water ingress.

  10. #10
    Senior Member
    Join Date
    Nov 2011
    Location
    Bonbeach
    Age
    34
    Posts
    489

    Default

    I thought that the idea was to allow for any condensation to drain out, rather than keep the fibre protected from water ingress, if its folded up any water will be trapped?

  11. #11
    2K Club Member
    Join Date
    Dec 2009
    Location
    Melbourne
    Posts
    2,580

    Default

    Quote Originally Posted by CraigandKate View Post
    I thought that the idea was to allow for any condensation to drain out, rather than keep the fibre protected from water ingress, if its folded up any water will be trapped?
    I thought the idea of anticon is to prevent condensation on the underside of the roof through contact by 'warming up' (in effect) the metal so moisture doesn't condense on the underside.

  12. #12
    Old Chippy 6K
    Join Date
    Mar 2007
    Location
    Canberra
    Age
    70
    Posts
    6,571

    Default

    This info is all in the forum library . . . The latest guide is here: http://icanz.org.au/wp-content/uploa...ember-2013.pdf
    Advice from me on this forum is general and for guidance based on information given by the member posing the question. Not to be used in place of professional advice from people appropriately qualified in the relevant field. All structural work must be approved and constructed to the BCA or other relevant standards by suitably licensed persons. The person doing the work and reading my advice accepts responsibility for ensuring the work done accords with the applicable law.

  13. #13
    7K Club Member
    Join Date
    Jun 2010
    Location
    Geelong
    Posts
    7,778

    Default

    Quote Originally Posted by Bloss View Post
    This info is all in the forum library . . . The latest guide is here: http://icanz.org.au/wp-content/uploa...ember-2013.pdf
    I may not be searching for the right words, but I can't find any reference to anticon, blanket, etc installed directly under a metal roof

  14. #14
    Old Chippy 6K
    Join Date
    Mar 2007
    Location
    Canberra
    Age
    70
    Posts
    6,571

    Default

    Quote Originally Posted by r3nov8or View Post
    I may not be searching for the right words, but I can't find any reference to anticon, blanket, etc installed directly under a metal roof
    That guide gives general principles & instructions. This Anticon (and same as for other brands) brochure which has descriptions of how it works and graphical representations of correct installation (noting that the fibre stays under the roof line while the foil extends over the gutter) http://bradfordinsulation.com.au/~/m...-Brochure.ashx

    Actually the graphics for correct installation are in Part 1 ICANZ – Insulation Handbook with all the thermal information.
    Advice from me on this forum is general and for guidance based on information given by the member posing the question. Not to be used in place of professional advice from people appropriately qualified in the relevant field. All structural work must be approved and constructed to the BCA or other relevant standards by suitably licensed persons. The person doing the work and reading my advice accepts responsibility for ensuring the work done accords with the applicable law.

  15. #15
    Senior Member
    Join Date
    Nov 2011
    Location
    Bonbeach
    Age
    34
    Posts
    489

    Default

    Shortcut..

    Attached Thumbnails Attached Thumbnails insulation.png  

  16. #16
    7K Club Member
    Join Date
    Jun 2010
    Location
    Geelong
    Posts
    7,778

    Default

    The front page of the Bradford PDF rightly shows the blanket laid in the direction of the sheets/fall of roof and shows the foil-only edge for overlapping. Show me an installer who routinely removes the bulk portion from the foil along the facia, and then one who also never compromises (e.g. cuts) the foil while doing so.

Similar Threads

  1. Blanket on garage roof
    By Micky013 in forum Roofing
    Replies: 15
    Last Post: 28th Apr 2015, 01:10 PM
  2. Insulation blanket pizza oven
    By cherub65 in forum Buy, Sell n Swap
    Replies: 0
    Last Post: 23rd May 2013, 05:12 PM
  3. Replies: 10
    Last Post: 8th May 2013, 02:03 PM
  4. Weathered Jarrah roof beam ends.
    By polony in forum Roofing
    Replies: 3
    Last Post: 2nd Apr 2013, 05:49 AM
  5. Any special regulations for Garage to House doors in Victoria
    By HandyDaddy in forum Structural Renovation
    Replies: 1
    Last Post: 4th Jan 2012, 08:17 AM

Posting Permissions

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