Flat Roof Options - Owl Lava 20

busterjones

Anyone have any experience of Owl Lava 20 product?

As seen here:

https://youtu.be/RXRn5QzMWyE?si=YPwroNOPsDp7PM6h

Have had felt in the past and its a disaster.

Considering this as an alternative but would love to know if anyone here has any experience of results.

Thanks!

Rows Grower

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

mickdw

https://www.boards.ie/discussion/2058310685/flat-roof-options-owl-lava-20

Don't like the look of that at all.

I certainly wouldn't use it.

Dont Be at It

https://www.boards.ie/discussion/comment/121022643#Comment_121022643

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

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.

SC024

https://www.boards.ie/discussion/comment/121033519#Comment_121033519

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.

hesker

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

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?

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

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

randombar

https://www.boards.ie/discussion/comment/121089963#Comment_121089963

Any more info on getting the flashings right?

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

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.

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😁😁

randombar

https://www.boards.ie/discussion/comment/121092560#Comment_121092560

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

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.

randombar

https://www.boards.ie/discussion/comment/121097615#Comment_121097615

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