Flat roofs anyone?

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Flat roofs anyone?

Postby Mike Leflay » Tue Apr 01, 2014 10:15 am

I have a small (30m) flat roof that is knackered. There seems to be a host of alternatives to the now clearly outdated felt that only lasts 10-15 years.

So any suggestions as to what is the best alternative?

Thanks in advance.

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Re: Flat roofs anyone?

Postby Jo King » Tue Apr 01, 2014 11:18 am

Sarnafil Mike - we've used it on a few projects and about to use it again.

http://gbr.sarnafil.sika.com

We recommended it to a friend who decided to ignore this recommendation and use GRP instead - because a leading double glazing company were promoting it. It leaks and he is having all sorts of problems/disputes now. We've not had a failure with Sarnafil to date but it must be installed by an approved installer and not a DIY job.
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Re: Flat roofs anyone?

Postby Steve Griff » Tue Apr 01, 2014 11:41 am

I thought fiberglass had a 40 year life Jo?
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Re: Flat roofs anyone?

Postby Mike Leflay » Tue Apr 01, 2014 11:43 am

Hi Jo

Thanks. We have had an estimate from a sarnafil installer and frankly I thought he was taking the piss. His estimate was 74 for a 30 m square roof that has no complications, no soil pipes no roof lights, nothing. EDPM is looking like around 2k. ............is it really worth the extra money?

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Re: Flat roofs anyone?

Postby Nick » Tue Apr 01, 2014 11:50 am

I don't know if EDPM is the same as what I know as Elastomeric Felt - I've been using that for 20 years, and it comes with a 30 year guarantee so it may have been around 30 years & there maybe some feedback on it's life now. I'd not heard of Snarfil, but I've used Sika for tanking & it worked well.
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Re: Flat roofs anyone?

Postby Mike Leflay » Tue Apr 01, 2014 12:34 pm

Sorry that should have said 7k
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Re: Flat roofs anyone?

Postby Jo King » Tue Apr 01, 2014 1:17 pm

The last Sarnafil roof we did was about 30m2 (over two seperate roofs) plus ribs to look like lead, plus mouldings around windows - total cost £1100.

I'd ask Sarnafil direct what it should costv- that's what we did.

Steve - I'm just telling you how it has been for our friend who has had a year of hell with water ruining a newly decorated lounge after having Everest install GRP - it still hasn't been resolved.
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Re: Flat roofs anyone?

Postby Rob H » Mon Apr 07, 2014 10:00 am

I've experience of Sarnafil in a commercial context, its excellent.

I worked on construction of a combined John Lewis & Sainsbury store in Cheadle, Cheshire and the entire roof was covered in Sarnafil.
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Re: Flat roofs anyone?

Postby Steve Griff » Mon Apr 07, 2014 10:36 am

Jo King wrote:The last Sarnafil roof we did was about 30m2 (over two seperate roofs) plus ribs to look like lead, plus mouldings around windows - total cost £1100.

I'd ask Sarnafil direct what it should costv- that's what we did.

Steve - I'm just telling you how it has been for our friend who has had a year of hell with water ruining a newly decorated lounge after having Everest install GRP - it still hasn't been resolved.



Fair enough Jo, it's like any product, it's only as good as the tool holding the trowel.
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Re: Flat roofs anyone?

Postby Nick » Mon Apr 07, 2014 10:47 am

Steve Griff wrote:Fair enough Jo, it's like any product, it's only as good as the tool holding the trowel.


I was thinking that.
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Re: Flat roofs anyone?

Postby Jo King » Mon Apr 07, 2014 2:50 pm

That is true Steve. Likewise, we've always found it's crucial to specify and manage installations correctly.
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