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Default Flat roof - again.

Heavy rain all yesterday shows my flat roof is leaking again. It's felt,
and about 30 years old. Been 'fixed' a few times, but time to replace.

The deck is good quality ply, so hoping that is still fine. All the
flashings etc lead. It was designed by a decent architect, and installed
by his recommended builders and roofers.

Size is approx 3.5 x 4 metre

Anyone give a rough guide as to costs - felt, membrane, glass fibre?

Access is easy so no scaffolding needed.

At my age, even felt done well is likely to see me out. But I'd consider
something better - if I can afford it.

--
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Default Flat roof - again.

On Sat, 05 Jun 2021 12:03:44 +0100, "Dave Plowman (News)"
wrote:

Heavy rain all yesterday shows my flat roof is leaking again. It's felt,
and about 30 years old. Been 'fixed' a few times, but time to replace.

The deck is good quality ply, so hoping that is still fine. All the
flashings etc lead. It was designed by a decent architect, and installed
by his recommended builders and roofers.

Size is approx 3.5 x 4 metre

Anyone give a rough guide as to costs - felt, membrane, glass fibre?

Access is easy so no scaffolding needed.

At my age, even felt done well is likely to see me out. But I'd consider
something better - if I can afford it.

At the beginning of 2020 I had mine redone.
About the same size as yours, but decking was chipboard and totally
fu**ed. Also 3 stories up so a couple of 100 worth of scaffolding
needed.
New roof, multi layer felt, hot tar on OSB3 boarding, cost about
2400.
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Default Flat roof - again.

In article ,
Davidm wrote:
On Sat, 05 Jun 2021 12:03:44 +0100, "Dave Plowman (News)"
wrote:


Heavy rain all yesterday shows my flat roof is leaking again. It's felt,
and about 30 years old. Been 'fixed' a few times, but time to replace.

The deck is good quality ply, so hoping that is still fine. All the
flashings etc lead. It was designed by a decent architect, and installed
by his recommended builders and roofers.

Size is approx 3.5 x 4 metre

Anyone give a rough guide as to costs - felt, membrane, glass fibre?

Access is easy so no scaffolding needed.

At my age, even felt done well is likely to see me out. But I'd consider
something better - if I can afford it.

At the beginning of 2020 I had mine redone.
About the same size as yours, but decking was chipboard and totally
fu**ed. Also 3 stories up so a couple of 100 worth of scaffolding
needed.
New roof, multi layer felt, hot tar on OSB3 boarding, cost about
2400.


Thanks, David. I was hoping about 3k would cover it.

--
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Dave Plowman London SW
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Default Flat roof - again.



"Dave Plowman (News)" wrote in message
...
Heavy rain all yesterday shows my flat roof is leaking again. It's felt,
and about 30 years old. Been 'fixed' a few times, but time to replace.

The deck is good quality ply, so hoping that is still fine.


a false economy

a replacement deck is a trivial part of the whole

All the
flashings etc lead. It was designed by a decent architect, and installed
by his recommended builders and roofers.

Size is approx 3.5 x 4 metre

Anyone give a rough guide as to costs - felt, membrane, glass fibre?

Access is easy so no scaffolding needed.


it doesn't matter how easy access is, it's how easy it is to fall off that
the issue

and that will be much the same for all non-enclosed roofs.



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Default Flat roof - again.

On 05/06/2021 12:03, Dave Plowman (News) wrote:
Anyone give a rough guide as to costs - felt, membrane, glass fibre?


I have been thinkig about flat rooves. I'd go one piece EPDM. Call up a
few people and ask about a price for the job.


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Default Flat roof - again.

Chris Bacon wrote:
On 05/06/2021 12:03, Dave Plowman (News) wrote:
Anyone give a rough guide as to costs - felt, membrane, glass fibre?


I have been thinkig about flat rooves. I'd go one piece EPDM. Call up a
few people and ask about a price for the job.


Interesting:
https://www.roofingsuperstore.co.uk/...ear-metre.html

About £150 for a single-garage sized piece, plus sundries. If the decking
is in good order doesn't look infeasible as a DIY job.

https://www.rubber4roofs.co.uk/classicbond-calculator
prices up all the extras.

Theo
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Default Flat roof - again.

In message , "Dave Plowman (News)"
writes
Heavy rain all yesterday shows my flat roof is leaking again. It's felt,
and about 30 years old. Been 'fixed' a few times, but time to replace.

The deck is good quality ply, so hoping that is still fine. All the
flashings etc lead. It was designed by a decent architect, and installed
by his recommended builders and roofers.

Size is approx 3.5 x 4 metre

Anyone give a rough guide as to costs - felt, membrane, glass fibre?

Access is easy so no scaffolding needed.

At my age, even felt done well is likely to see me out. But I'd consider
something better - if I can afford it.


Have a look at *Composite Roof Supplies*. I did a 3m x 2.5m porch roof
for not very much. Strangely, although I have the delivery note, I can
find no record of payment!

There are *how to* instructions he-
https://www.fixmyroof.co.uk/videos-a...lacement/how-t
o-fibreglass-a-roof/


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Default Flat roof - again.

In article ,
tim... wrote:


"Dave Plowman (News)" wrote in message
...
Heavy rain all yesterday shows my flat roof is leaking again. It's
felt, and about 30 years old. Been 'fixed' a few times, but time to
replace.

The deck is good quality ply, so hoping that is still fine.


a false economy


Really?

a replacement deck is a trivial part of the whole


When did you last buy decent quality ply?

All the flashings etc lead. It was designed by a decent architect, and
installed by his recommended builders and roofers.

Size is approx 3.5 x 4 metre

Anyone give a rough guide as to costs - felt, membrane, glass fibre?

Access is easy so no scaffolding needed.


it doesn't matter how easy access is, it's how easy it is to fall off
that the issue


and that will be much the same for all non-enclosed roofs.


If I feel safe up there, I'd expect a skilled roofer to do too. It has
parapet walls.

--
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Dave Plowman London SW
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Default Flat roof - again.


"Dave Plowman (News)" wrote in message
...
Heavy rain all yesterday shows my flat roof is leaking again. It's
felt, and about 30 years old. Been 'fixed' a few times, but time to
replace.

did you not have that done with Promenade tiles a few years ago?





--


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Default Flat roof - again.

In article ,
Mark wrote:

"Dave Plowman (News)" wrote in message
...
Heavy rain all yesterday shows my flat roof is leaking again. It's
felt, and about 30 years old. Been 'fixed' a few times, but time to
replace.

did you not have that done with Promenade tiles a few years ago?


That is the roof terrace. This is a different flat roof that there's no
immediate access to.





--


--
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Dave Plowman London SW
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Default Flat roof - again.

On 05/06/2021 17:15, Chris Bacon wrote:
On 05/06/2021 12:03, Dave Plowman (News) wrote:
Anyone give a rough guide as to costs - felt, membrane, glass fibre?


I have been thinkig about flat rooves. I'd go one piece EPDM. Call up a
few people and ask about a price for the job.


Quite easy to DIY, but whoever does it will have to overboard
the existing plywood decking with another layer of ply or
OSB3 because the water-based adhesive needs a clean substrate.
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Default Flat roof - again.

Chap finally came round today. He's the builder the architect who designed
the conversion all those years ago now uses. I simply don't know any
roofers. And would rather go by a recommendation.

Interesting chap. Said he is a builder, not roofer. Who now does roofs on
his jobs himself. After getting ripped off once too often with
contractors. ;-)

And only does glass fibre. Felt is for sheds, he says. Fairy nuff - no
point in learning more than one skill if you're not going to use it.

Tim guessed right. He wants it scaffolded for safety reasons - even
although he went up to have a good look without. However, I could make use
of the scaffold to paint the window. It was done a couple of years ago.
But be silly to pay for scaffolding again in a year or so.

He reckoned about 5 days work, assuming the base is OK. The BOM from the
architect specified marine ply, so I'm hoping that's what was used, and is
still OK. There are no signs of sagging.

Found an online calculator which reckoned on about 500 quid for materials.
He's going to give me a price next week.

--
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Dave Plowman London SW
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Default Flat roof - again.

On 11/06/2021 15:45, Dave Plowman (News) wrote:
Chap finally came round today. He's the builder the architect who designed
the conversion all those years ago now uses. I simply don't know any
roofers. And would rather go by a recommendation.

Interesting chap. Said he is a builder, not roofer. Who now does roofs on
his jobs himself. After getting ripped off once too often with
contractors. ;-)

And only does glass fibre. Felt is for sheds, he says. Fairy nuff - no
point in learning more than one skill if you're not going to use it.

Tim guessed right. He wants it scaffolded for safety reasons - even
although he went up to have a good look without. However, I could make use
of the scaffold to paint the window. It was done a couple of years ago.
But be silly to pay for scaffolding again in a year or so.

He reckoned about 5 days work, assuming the base is OK. The BOM from the
architect specified marine ply, so I'm hoping that's what was used, and is
still OK. There are no signs of sagging.


This might be of interest.

https://www.diynot.com/diy/threads/m...e-roof.333510/

It seems OSB grade 3 might be best. Make sure it is the right grade.
https://en.wikipedia.org/wiki/Oriented_strand_board

Be wary of where he gets the marine ply from. Some is certified, and
some isn't.

It is still recommended to paint all edges with a sealer, for both OSB
and marine ply.

Found an online calculator which reckoned on about 500 quid for materials.
He's going to give me a price next week.


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Default Flat roof - again.

In article ,
Fredxx wrote:
He reckoned about 5 days work, assuming the base is OK. The BOM from
the architect specified marine ply, so I'm hoping that's what was
used, and is still OK. There are no signs of sagging.


This might be of interest.

https://www.diynot.com/diy/threads/m...e-roof.333510/


It seems OSB grade 3 might be best. Make sure it is the right grade.
https://en.wikipedia.org/wiki/Oriented_strand_board


Be wary of where he gets the marine ply from. Some is certified, and
some isn't.


I'm hoping it won't need replacing. The construction of the roof - and the
rest of the conversion was done by Trevor the chippy who I loved watch
work - a true craftsman. But didn't say much. This about 30 years ago. He
sadly died young. A local roofing firm did the felt and lead work. But
they no longer exist.

It is still recommended to paint all edges with a sealer, for both OSB
and marine ply.


I didn't see all of the construction stages due to being at work.

--
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Dave Plowman London SW
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Default Flat roof - again.

In article , Dave Plowman (News)
scribeth thus
Chap finally came round today. He's the builder the architect who designed
the conversion all those years ago now uses. I simply don't know any
roofers. And would rather go by a recommendation.

Interesting chap. Said he is a builder, not roofer. Who now does roofs on
his jobs himself. After getting ripped off once too often with
contractors. ;-)

And only does glass fibre. Felt is for sheds, he says. Fairy nuff - no
point in learning more than one skill if you're not going to use it.

Tim guessed right. He wants it scaffolded for safety reasons - even
although he went up to have a good look without. However, I could make use
of the scaffold to paint the window. It was done a couple of years ago.
But be silly to pay for scaffolding again in a year or so.

He reckoned about 5 days work, assuming the base is OK. The BOM from the
architect specified marine ply, so I'm hoping that's what was used, and is
still OK. There are no signs of sagging.

Found an online calculator which reckoned on about 500 quid for materials.
He's going to give me a price next week.



E.D.P.M Dave, excellent stuff, we did our garage/workshop for 800 inc
the use of a labourer mate for a day essentially its a DIY operation and
we were quoted around 4000 bloody thousand quid by three supposed
roofers and one wanted Cash and VAT on top of the cash!! Was told to
**** off in no uncertain terms!

So DIY and it doesn't leak and looks fine this lot supplied and were
very helpful all along..

https://www.rubber4roofs.co.uk/?utm_...medium=organic
--
Tony Sayer


Man is least himself when he talks in his own person.

Give him a keyboard, and he will reveal himself.




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Default Flat roof - again.

In article ,
tony sayer wrote:
In article , Dave Plowman (News)
scribeth thus
Chap finally came round today. He's the builder the architect who
designed the conversion all those years ago now uses. I simply don't
know any roofers. And would rather go by a recommendation.

Interesting chap. Said he is a builder, not roofer. Who now does roofs
on his jobs himself. After getting ripped off once too often with
contractors. ;-)

And only does glass fibre. Felt is for sheds, he says. Fairy nuff - no
point in learning more than one skill if you're not going to use it.

Tim guessed right. He wants it scaffolded for safety reasons - even
although he went up to have a good look without. However, I could make
use of the scaffold to paint the window. It was done a couple of years
ago. But be silly to pay for scaffolding again in a year or so.

He reckoned about 5 days work, assuming the base is OK. The BOM from
the architect specified marine ply, so I'm hoping that's what was used,
and is still OK. There are no signs of sagging.

Found an online calculator which reckoned on about 500 quid for
materials. He's going to give me a price next week.



E.D.P.M Dave, excellent stuff, we did our garage/workshop for 800 inc
the use of a labourer mate for a day essentially its a DIY operation and
we were quoted around 4000 bloody thousand quid by three supposed
roofers and one wanted Cash and VAT on top of the cash!! Was told to
**** off in no uncertain terms!


So DIY and it doesn't leak and looks fine this lot supplied and were
very helpful all along..


https://www.rubber4roofs.co.uk/?utm_...medium=organic


Not going to DIY it Tony. Getting too old to climb ladders, and the hands
are getting rather arthritic too.

And rather than risk finding a roofer by picking one with a pin, I'll use
the one I've had recommended. So will do what he recommends. Although I've
not yet seen his estimate. The general view is fibreglass is the best
though. My architect does a lot of extensions etc round here, and is as
good as any at not making them stand out like a store thumb - as much as
possible. And he now reckons on fibreglass too. Unlike 30 odd years ago
when he did this job, when it was felt.

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Default Flat roof - again.

Chris Bacon wrote:

Dave Plowman wrote:

Must admit to wondering why the existing can't be cleaned, if in good
condition?


"You must ensure that the decking is completely dry and clear of any
surface debris before applying the ClassicBond EPDM Deck Adhesive. Of
course, installation couldnt be easier making this product ideally
suited for both amateurs and professionals alike".

Yoiu can also get a primer for the job.


But if it's been felted before, it'll have asphalt on the deck, which
"nothing" sticks to, and it's difficult to get it off completely.


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Default Flat roof - again.

In article ,
Andy Burns wrote:
Chris Bacon wrote:


Dave Plowman wrote:

Must admit to wondering why the existing can't be cleaned, if in good
condition?


"You must ensure that the decking is completely dry and clear of any
surface debris before applying the ClassicBond EPDM Deck Adhesive. Of
course, installation couldnt be easier making this product ideally
suited for both amateurs and professionals alike".

Yoiu can also get a primer for the job.


But if it's been felted before, it'll have asphalt on the deck, which
"nothing" sticks to, and it's difficult to get it off completely.


Thanks, Andy. Since I'll almost certainly be going to glass fibre, does
the same apply?

--
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Dave Plowman London SW
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Default Flat roof - again.

Dave Plowman wrote:

Andy Burns wrote:

if it's been felted before, it'll have asphalt on the deck, which
"nothing" sticks to, and it's difficult to get it off completely.


Thanks, Andy. Since I'll almost certainly be going to glass fibre, does
the same apply?


I suppose I should have said bitumen rather than asphalt, but I dunno
whether resin would stick to it any better, if the chaps says new
decking is required, I'd tend to accept that.

When I EDPM'ed my roof the deck was soggy weetabix anyway, so got replaced.
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Default Flat roof - again.

In article ,
Andy Burns wrote:
Dave Plowman wrote:


Andy Burns wrote:

if it's been felted before, it'll have asphalt on the deck, which
"nothing" sticks to, and it's difficult to get it off completely.


Thanks, Andy. Since I'll almost certainly be going to glass fibre, does
the same apply?


I suppose I should have said bitumen rather than asphalt, but I dunno
whether resin would stick to it any better, if the chaps says new
decking is required, I'd tend to accept that.


When I EDPM'ed my roof the deck was soggy weetabix anyway, so got replaced.


As I said the spec on mine was decent marine ply, and I'd guess that was
what used. There's no signs of sagging. But of course fixing fresh ply to
that ain't going to cost a fortune.

--
*If at first you don't succeed, destroy all evidence that you tried *

Dave Plowman London SW
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Default Flat roof - again.

On 14/06/2021 11:32, Andy Burns wrote:
Dave Plowman wrote:

Andy Burns wrote:

if it's been felted before, it'll have asphalt on the deck, which
"nothing" sticks to, and it's difficult to get it off completely.


Thanks, Andy. Since I'll almost certainly be going to glass fibre, does
the same apply?


I suppose I should have said bitumen rather than asphalt, but I dunno
whether resin would stick to it any better, if the chaps says new
decking is required, I'd tend to accept that.

When I EDPM'ed my roof the deck was soggy weetabix anyway, so got replaced.


With fibreglass it is even more important for all ply/OSB edges to be
supported. This means either using 18mm T&G OSB 8x2 decking or
supporting *all* butt joints with noggins.
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