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Flat Roof Options - Owl Lava 20

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  • Registered Users Posts: 8,032 ✭✭✭Rows Grower


    Felt worked good for me for 30 years and was simple and cheap to redo.

    "Very soon we are going to Mars. You wouldn't have been going to Mars if my opponent won, that I can tell you. You wouldn't even be thinking about it."

    Donald Trump, March 13th 2018.



  • Registered Users Posts: 23,353 ✭✭✭✭mickdw


    Don't like the look of that at all.

    I certainly wouldn't use it.



  • Registered Users Posts: 420 ✭✭Dont Be at It


    What is the best meterial for flat roofs these days? The two main options seem to be fibreglass or Trocal.



  • Registered Users Posts: 23,353 ✭✭✭✭mickdw


    Ya lots of single ply systems such as trocal that do the same thing.

    Alot of people are fans of fiberglass but I've seen a few jobs that I would doubt in terms of life span.

    Asphalt in my opinion is a great flat roof material. Great for sealing around penetrations, is a hot trowel on material about 20mm thick when finished and really is a long term solution.



  • Registered Users Posts: 584 ✭✭✭SC024


    Paralon is another torch on system, If done correctly certain supplier will give a 15 or 20 year gaurantee with their system provided you use accredited installers.



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  • Registered Users Posts: 1,511 ✭✭✭hesker


    What about EPDM. Have not used it myself but see it listed



  • Registered Users Posts: 3,398 ✭✭✭randombar


    Sorry to thread bump here guys but looking for similar advice.

    I've been told fibreglass is the way to go, then others say no it's not as it breaks at the joint to the existing building.

    Others saying trocal and others saying mineral felt.

    Head bloody melted from it!

    Any advice?



  • Moderators, Home & Garden Moderators Posts: 10,140 Mod ✭✭✭✭BryanF


    Bitumen 2ply system laid to good fall.

    ask is fibre system u-v sable

    whatever system you go ensure contractor & manufacturers joint warranty is in place for +20years



  • Registered Users Posts: 215 ✭✭2018na


    i have been involved with fiberglass systems since about 2011 ish. Only on extensions and things that we have built ourselves. Zero issues to report but flashings are a completely different issue. This is the major thing to get right regardless of roofing system and most so called specialist people haven’t a clue. This is what wlll leak



  • Registered Users Posts: 3,398 ✭✭✭randombar




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  • Registered Users Posts: 215 ✭✭2018na


    Every situation is different so there are no one size fits all. Details around cappings pebble dashing etc every job is different. The flat roof experts generally don’t get involved in this part



  • Registered Users Posts: 23,353 ✭✭✭✭mickdw


    Which makes me wonder about the guarantee.

    Most have standard details associated with their systems yet ive seen more than a few contractors offering the 20 year warranty who have poor regard for detailing.



  • Registered Users Posts: 215 ✭✭2018na


    I don’t think any of the trocal or fiberglass crowds get involved in any flashing or else charge extra. And from what I’ve seen they aren’t very skilled at it😁😁



  • Registered Users Posts: 3,398 ✭✭✭randombar


    Re flashing, would lead be the flashing of choice when joining to a standard plastered wall?



  • Registered Users Posts: 215 ✭✭2018na


    I personally like to use fiberglass glass flashing trims as much as possible but lead also has its place if you prefer it for the cover flashing that is chased/cut into the wall.



  • Registered Users Posts: 3,398 ✭✭✭randombar


    Ya I'm still leaning towards fibreglass all right. Those trims look decent.



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