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GRP or EPDM - Had quotes not sure what to go with


 
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Rosi11

from United Kingdom

Joined: 02 Apr 2012
Posts: 2
Location: Buckinghamshire,
United Kingdom

PostPosted: Mon Apr 02, 2012 3:21 pm Reply with quote

Hi

Hope someone can help.

We are building an extension with a flat roof - roughly about 27sqm. We've had a quote for GRP of 1200 with a 10 yr guarantee. This seems very cheap - does anyone have any opinions?

We've also had a quote for a epdm system which is coming out 1944.

We are on a tight budget so the GRP seems the better option at the moment but we dont want to go for the cheap option and then find we have lots of problems.

We are also not sure which is the better system to go with GRP or the EPDM.

Any thoughts would be appreciated.

Thanks
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cotswoldbuilders

from United Kingdom

Joined: 22 Sep 2011
Posts: 767
Location: Gloucestershire,
United Kingdom
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PostPosted: Mon Apr 02, 2012 3:42 pm Reply with quote

Your going to get a lot of different suggestions here, every one has their favoured roof system.
Ive done, pour and roll, torch on, glass fibre and epdm.
My choice would be epdm.
As said others will be along later stating their preferences, at the end of the day, if the materials are all good quality it relies very much on the fitters and how good a job they do.
All flat roofing materials are good in their own right, but only if correctly installed.
Ive seen some good roofs in felt, epdm and glass fibre, and Ive also seen some real shoddy work.
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Xenon

from United Kingdom

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Location: Essex,
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PostPosted: Mon Apr 02, 2012 5:21 pm Reply with quote

EPDM = 72 M2 Fitted icon_eek.gif icon_lol.gif Material cost - 5-6 a M2 or lets be generous and say 10.

GRP = 44m2 Fitted icon_eek.gif icon_lol.gif Material cost who knows without seeing the product.

Asphalt = 45 M2 Fitted. Material cost 14.50 M2.

HT Felt = 38 M2 Fitted. Material cost 9.00 M2

GRP i wouldn't touch with a barge pole, the rest as mentions depend on quality of install and a bit of maths.
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freddymercurystwin

from United Kingdom

Joined: 21 Jan 2007
Posts: 13177
Location: Devon,
United Kingdom
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PostPosted: Mon Apr 02, 2012 5:25 pm Reply with quote

cotswoldbuilders wrote:
others will be along later stating their preferences, at the end of the day, if the materials are all good quality it relies very much on the fitters and how good a job they do.
All flat roofing materials are good in their own right, but only if correctly installed.
Ive seen some good roofs in felt, epdm and glass fibre, and Ive also seen some real shoddy work.

Aye agree with this wholeheartedly.
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dilly

from United Kingdom

Joined: 08 Mar 2007
Posts: 304
Location: United Kingdom
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PostPosted: Mon Apr 02, 2012 6:37 pm Reply with quote

Hi,are the prices for laying the deck as well,if so the grp quote is way to low the epdm is about right going by the rubber roof chap on here not so long ago he quoted 60 per sqm.
I prefer Grp if well laid same as any system its how well its laid and how much experience the installer has of the product.
For full peace of mind go for a BBA system that comes with a independent insurance backed guarantee for both labour and materials.But then costs go up
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Rosi11

from United Kingdom

Joined: 02 Apr 2012
Posts: 2
Location: Buckinghamshire,
United Kingdom

PostPosted: Tue Apr 03, 2012 8:03 am Reply with quote

the price is just for the GRP - we have done the deck ourselves.
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Pedrx

from United Kingdom

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Location: Anglesey,
United Kingdom
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PostPosted: Tue Apr 03, 2012 8:30 am Reply with quote

[quote= we have done the deck ourselves.[/quote]

Laying the rubber I found easier than the woodwork. Cost me, for a similar sized roof, about 500 for the materials.
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Dodgydave2

from United Kingdom

Joined: 05 Jun 2008
Posts: 24
Location: Surrey,
United Kingdom

PostPosted: Tue Apr 10, 2012 5:16 pm Reply with quote

We are Firestone aproved contractors and GRP suppliers Installers there is no comparison GRP if done correctly will last for years you need at least 2 layers of 450 matt I will only use EPDM on industrial contracts does not matter how well it is fitted it will look rough after a year or so. EPDM is purchased for 6.00 M2 cost of GRP 50.00 M2 fitted you can do the GRP yourself pick up the materials from us free training

Check out the-roofer.co.uk photos of both GRP Roof
GRP Roof
Firestone EPDM
Firestone EPDM
EPDM supplied and fitted by large Window Company now offering roofing services
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cotswoldbuilders

from United Kingdom

Joined: 22 Sep 2011
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Location: Gloucestershire,
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PostPosted: Tue Apr 10, 2012 7:18 pm Reply with quote

Whats happening in the 2nd photo (epdm roof )

Looks like the rubber has been pulled back, and a bucket of water thrown over it, ?
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Dodgydave2

from United Kingdom

Joined: 05 Jun 2008
Posts: 24
Location: Surrey,
United Kingdom

PostPosted: Tue Apr 10, 2012 8:07 pm Reply with quote

We were asked to look at a leaking roof, the water is just a puddle the joint was just lifted back it was supposed to have been laid in one piece.
The operative who had done the work for a large window company had been a milkman done 1 days training in EPDM then let loose on an old ladys roof she was charged over 4000 for 60M2 and it leaked from day 1 she never got her money back guarantee worthless.
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cotswoldbuilders

from United Kingdom

Joined: 22 Sep 2011
Posts: 767
Location: Gloucestershire,
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Thanked: 164 times

PostPosted: Tue Apr 10, 2012 8:25 pm Reply with quote

Thats the type of guys that give the trade a bad name, no pride taken in their work.

It looks like it wasnt glued down, was there a splice tape joining the 2 pieces, and was it done correctly.
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Zeberdee

from United Kingdom

Joined: 20 Jan 2007
Posts: 159
Location: Birmingham,
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PostPosted: Thu Apr 12, 2012 8:34 pm Reply with quote

Looks like no 3"" seam tape was used IMO.

Yet another so called Flat Roofer who thinks they can fit EPDM and who clearly knows nothing about fitting it. No care and pride in the work whatsoever.
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Zeberdee

from United Kingdom

Joined: 20 Jan 2007
Posts: 159
Location: Birmingham,
United Kingdom
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PostPosted: Thu Apr 12, 2012 8:39 pm Reply with quote

Rosi11 wrote:
Hi

Hope someone can help.

We are building an extension with a flat roof - roughly about 27sqm. We've had a quote for GRP of 1200 with a 10 yr guarantee. This seems very cheap - does anyone have any opinions?

We've also had a quote for a epdm system which is coming out 1944.

We are on a tight budget so the GRP seems the better option at the moment but we dont want to go for the cheap option and then find we have lots of problems.

We are also not sure which is the better system to go with GRP or the EPDM.

Any thoughts would be appreciated.

Thanks


Go with EPDM, But try and get a couplemore quotes at least.

The 1944 for EPDM seems steep to me if you've already boarded it??

1944 is about 72 sq mt.

1300 is a more reasonable figure. Maybe even cheaper...Depending on who you get to do it.
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