Hi, could anyone please suggest an affordable alternative to celotex?
It's the rigigity rather than the R value that is of interest to it's
intended use.

Thanks.

Nitro® wrote:
Hi, could anyone please suggest an affordable alternative to celotex?
It's the rigigity rather than the R value that is of interest to it's
intended use.


More info required I think.
What's it's intended use? - how thick do you want it?
How many sheets do you require/

WB BTW, LTNS :-p

On 09/11/13 20:41, Nitro® wrote:
Hi, could anyone please suggest an affordable alternative to celotex?
It's the rigigity rather than the R value that is of interest to it's
intended use.

Thanks.

high density poly foam?


--
Ineptocracy

(in-ep-toc-ra-cy) €“ a system of government where the least capable to
lead are elected by the least capable of producing, and where the
members of society least likely to sustain themselves or succeed, are
rewarded with goods and services paid for by the confiscated wealth of a
diminishing number of producers.

On Saturday 09 November 2013 20:41 Nitro® wrote in uk.d-i-y:

Hi, could anyone please suggest an affordable alternative to celotex?
It's the rigigity rather than the R value that is of interest to it's
intended use.

Thanks.

What are you basing your assumptions on?

"celotex" is availbale a lot cheaper from ebay than say, Wickes.

The price also tends to drop when you order lots, eg 10 sheets, 20 sheets
etc.

--
Tim Watts Personal Blog: http://squiddy.blog.dionic.net/

http://www.sensorly.com/ Crowd mapping of 2G/3G/4G mobile signal coverage

On Sat, 09 Nov 2013 21:07:50 +0000, Tim Watts wrote:

Hi, could anyone please suggest an affordable alternative to
celotex?
It's the rigigity rather than the R value that is of interest to
it's
intended use.

What are you basing your assumptions on?

"celotex" is availbale a lot cheaper from ebay than say, Wickes.

The price also tends to drop when you order lots, eg 10 sheets, 20
sheets etc.

Or buy seconds.

--
Cheers
Dave.

On Saturday, November 9, 2013 10:13:45 PM UTC, Dave Liquorice wrote:
On Sat, 09 Nov 2013 21:07:50 +0000, Tim Watts wrote:



Hi, could anyone please suggest an affordable alternative to

celotex?

It's the rigigity rather than the R value that is of interest to

it's

intended use.



What are you basing your assumptions on?



"celotex" is availbale a lot cheaper from ebay than say, Wickes.



The price also tends to drop when you order lots, eg 10 sheets, 20

sheets etc.



Or buy seconds.



--

Cheers

Dave.

Yes, I've only ever bought seconds. Under the floor, in the walls. Of course everyone cannot buy "seconds" !
Simon.

In article ,
Nitro® writes:
Hi, could anyone please suggest an affordable alternative to celotex?
It's the rigigity rather than the R value that is of interest to it's
intended use.

If you buy nonames, be careful on the fireproofing (test a tiny
offcut, outdoors).

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

On Saturday, November 9, 2013 11:05:34 PM UTC, Andrew Gabriel wrote:
In article ,

Nitro® writes:

Hi, could anyone please suggest an affordable alternative to celotex?

It's the rigigity rather than the R value that is of interest to it's

intended use.



If you buy nonames, be careful on the fireproofing (test a tiny

offcut, outdoors).

Talking about that, its common to fill in gaps in celotex with expanding foam. I set fire to a lump of foam (actually plasterboard fixing foam) and it went up with alarming ferocity. I think you can get fireproof expanding foam though.
Simon.

On 09/11/2013 20:41, Nitro® wrote:

Hi, could anyone please suggest an affordable alternative to celotex?
It's the rigigity rather than the R value that is of interest to it's
intended use.

Depends on what you mean by affordable... last time I went to buy lots
of it (nearly 10 years ago) the builders merchant quoted £27 a 8x4 sheet
of 50mm. A local discount supplier provided a similar Ecotherm board at
£12/sheet


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

On 09/11/2013 20:41, Nitro® wrote:
Hi, could anyone please suggest an affordable alternative to celotex?
It's the rigigity rather than the R value that is of interest to it's
intended use.

Thanks.

Recticel. Jewsons are a distributor

"Nitro®" wrote in message
...
Hi, could anyone please suggest an affordable alternative to celotex? It's
the rigigity rather than the R value that is of interest to it's intended
use.

Thanks.

The affordable one is seconds.
Around half price.
Small bashes and malforms, easily fixed with canned foam or cut off.

Google "rigid insulation board seconds"

There is little mechanical strength, it relys on the foil to give it what
strength it has.
So really you are down to gluing ply or similar on to the surface.

On 10/11/2013 08:11, harryagain wrote:
"Nitro®" wrote in message
...
Hi, could anyone please suggest an affordable alternative to celotex? It's
the rigigity rather than the R value that is of interest to it's intended
use.

Thanks.

The affordable one is seconds.
Around half price.
Small bashes and malforms, easily fixed with canned foam or cut off.

Google "rigid insulation board seconds"


Sounds to be a good option - I'll take a look when I get round to doing
the floors.

In a recent attic rooms project I used some Q-therm. Didn't mean to - I
asked for Celotex, but that's what the builders' merchant gave me. About
60% of the price, ISTR, and very similar to work with.

There is little mechanical strength, it relys on the foil to give it what
strength it has.

I don't think the foil gives much strength - it's just bonded to the
foam, not too strongly, and is after all just foil. Peels off easily
enough too, so . . .

So really you are down to gluing ply or similar on to the surface.


wouldn't work too well IME. I'd specify sheets without foil.

Speaking with a friend, he's using it to fill cavities below ground. I
can see why, but he's relying on strength in compression (stop the
leaves pushing together), and I'd have thought there may be a bridging
risk. He also said you can lay flooring directly on top - doesn't sound
right to me. But this was after 4 pints ;-)


--
Cheers, Rob

PeterL wrote:

On 09/11/2013 20:41, Nitro® wrote:

It's the rigigity [...] that is of interest

Recticel.

Sounds like you'd get it from the chemist's ...

On Sun, 10 Nov 2013 08:20:58 +0000, RJH wrote:



Speaking with a friend, he's using it to fill cavities below ground. I
can see why, but he's relying on strength in compression (stop the
leaves pushing together), and I'd have thought there may be a bridging
risk. He also said you can lay flooring directly on top - doesn't sound
right to me. But this was after 4 pints ;-)

In domestic use having 6in of polystyrene (or similar, presumably)
under the floor is a Building Regs requirement.

On 10/11/2013 09:56, Peter Johnson wrote:
On Sun, 10 Nov 2013 08:20:58 +0000, RJH wrote:



Speaking with a friend, he's using it to fill cavities below ground. I
can see why, but he's relying on strength in compression (stop the
leaves pushing together), and I'd have thought there may be a bridging
risk. He also said you can lay flooring directly on top - doesn't sound
right to me. But this was after 4 pints ;-)

In domestic use having 6in of polystyrene (or similar, presumably)
under the floor is a Building Regs requirement.


With the floor resting on top?

--
Cheers, Rob

On Sunday, November 10, 2013 11:35:38 AM UTC, RJH wrote:
On 10/11/2013 09:56, Peter Johnson wrote:

On Sun, 10 Nov 2013 08:20:58 +0000, RJH wrote:







Speaking with a friend, he's using it to fill cavities below ground. I

can see why, but he's relying on strength in compression (stop the

leaves pushing together), and I'd have thought there may be a bridging

risk. He also said you can lay flooring directly on top - doesn't sound

right to me. But this was after 4 pints ;-)



In domestic use having 6in of polystyrene (or similar, presumably)

under the floor is a Building Regs requirement.





With the floor resting on top?



--

Cheers, Rob

Build roads on top of EPS

http://www.jablite.co.uk/casestudies...ion-case-study

On Sunday 10 November 2013 08:20 RJH wrote in uk.d-i-y:

On 10/11/2013 08:11, harryagain wrote:
"Nitro®" wrote in message
...
Hi, could anyone please suggest an affordable alternative to celotex?
It's the rigigity rather than the R value that is of interest to it's
intended use.

Thanks.

The affordable one is seconds.
Around half price.
Small bashes and malforms, easily fixed with canned foam or cut off.

Google "rigid insulation board seconds"


Sounds to be a good option - I'll take a look when I get round to doing
the floors.

http://www.ebay.co.uk/itm/Celotex-Ri...em3f25d5 5626

£22/sheet for 50mm - that's usually as good as the price gets unless you get
really lucky with "seconds".

HTH

Tim

--
Tim Watts Personal Blog: http://squiddy.blog.dionic.net/

http://www.sensorly.com/ Crowd mapping of 2G/3G/4G mobile signal coverage

On 10/11/13 11:35, RJH wrote:
On 10/11/2013 09:56, Peter Johnson wrote:
On Sun, 10 Nov 2013 08:20:58 +0000, RJH wrote:



Speaking with a friend, he's using it to fill cavities below ground. I
can see why, but he's relying on strength in compression (stop the
leaves pushing together), and I'd have thought there may be a bridging
risk. He also said you can lay flooring directly on top - doesn't sound
right to me. But this was after 4 pints ;-)

In domestic use having 6in of polystyrene (or similar, presumably)
under the floor is a Building Regs requirement.


With the floor resting on top?

yes.


--
Ineptocracy

(in-ep-toc-ra-cy) €“ a system of government where the least capable to
lead are elected by the least capable of producing, and where the
members of society least likely to sustain themselves or succeed, are
rewarded with goods and services paid for by the confiscated wealth of a
diminishing number of producers.

On 10/11/2013 11:35, RJH wrote:
On 10/11/2013 09:56, Peter Johnson wrote:
On Sun, 10 Nov 2013 08:20:58 +0000, RJH wrote:



Speaking with a friend, he's using it to fill cavities below ground. I
can see why, but he's relying on strength in compression (stop the
leaves pushing together), and I'd have thought there may be a bridging
risk. He also said you can lay flooring directly on top - doesn't sound
right to me. But this was after 4 pints ;-)

In domestic use having 6in of polystyrene (or similar, presumably)
under the floor is a Building Regs requirement.


With the floor resting on top?


If you mean a concrete slab on top then yes.

In article , Tim Watts
writes
On Sunday 10 November 2013 08:20 RJH wrote in uk.d-i-y:

On 10/11/2013 08:11, harryagain wrote:
"Nitro®" wrote in message
...
Hi, could anyone please suggest an affordable alternative to celotex?
It's the rigigity rather than the R value that is of interest to it's
intended use.

Thanks.

The affordable one is seconds.
Around half price.
Small bashes and malforms, easily fixed with canned foam or cut off.

Google "rigid insulation board seconds"


Sounds to be a good option - I'll take a look when I get round to doing
the floors.

http://www.ebay.co.uk/itm/Celotex-Ri...0x1200x50mm-x-
10-Sheet-Deal-/271217677862?pt=LH_DefaultDomain_3&hash=item3f25d5 5626

£22/sheet for 50mm - that's usually as good as the price gets unless you get
really lucky with "seconds".

For info, that's the current one off price at wickes so should be
beatable by a decent margin:

http://www.wickes.co.uk/invt/190544

They were doing discounts for purchases of 10 or more but not now.
--
fred
it's a ba-na-na . . . .

On 10/11/2013 08:20, RJH wrote:

Speaking with a friend, he's using it to fill cavities below ground. I
can see why, but he's relying on strength in compression (stop the
leaves pushing together), and I'd have thought there may be a bridging
risk. He also said you can lay flooring directly on top - doesn't sound
right to me. But this was after 4 pints ;-)

Its actually pretty strong in compression, and you can lay flooring
directly onto it in some cases. Its standard practice with a warm deck
roof for example to lay the insulation over the joists / firrings, then
the deck goes straight on top of it. Anything that spreads the load well
enough basically.


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

On 10/11/2013 12:25, Adam Aglionby wrote:
On Sunday, November 10, 2013 11:35:38 AM UTC, RJH wrote:
On 10/11/2013 09:56, Peter Johnson wrote:

On Sun, 10 Nov 2013 08:20:58 +0000, RJH wrote:







Speaking with a friend, he's using it to fill cavities below ground. I

can see why, but he's relying on strength in compression (stop the

leaves pushing together), and I'd have thought there may be a bridging

risk. He also said you can lay flooring directly on top - doesn't sound

right to me. But this was after 4 pints ;-)



In domestic use having 6in of polystyrene (or similar, presumably)

under the floor is a Building Regs requirement.





With the floor resting on top?



--

Cheers, Rob

Build roads on top of EPS

http://www.jablite.co.uk/casestudies...ion-case-study

Yup, the widened section and sliproads of the M60 between junctions 6
and 8 is sitting on slabs of that - ISTR they did have a problem with
someone setting fire to it overnight before it was covered.

My own conservatory has arouind 4" of screed sat on 4" Kingspan.

SteveW

On 10/11/2013 15:46, dennis@home wrote:
On 10/11/2013 11:35, RJH wrote:
On 10/11/2013 09:56, Peter Johnson wrote:
On Sun, 10 Nov 2013 08:20:58 +0000, RJH wrote:



Speaking with a friend, he's using it to fill cavities below ground. I
can see why, but he's relying on strength in compression (stop the
leaves pushing together), and I'd have thought there may be a bridging
risk. He also said you can lay flooring directly on top - doesn't sound
right to me. But this was after 4 pints ;-)

In domestic use having 6in of polystyrene (or similar, presumably)
under the floor is a Building Regs requirement.


With the floor resting on top?


If you mean a concrete slab on top then yes.

Or a floating wooden floor.

SteveW

On 10/11/2013 12:43, Tim Watts wrote:
On Sunday 10 November 2013 08:20 RJH wrote in uk.d-i-y:

On 10/11/2013 08:11, harryagain wrote:
"Nitro®" wrote in message
...
Hi, could anyone please suggest an affordable alternative to celotex?
It's the rigigity rather than the R value that is of interest to it's
intended use.

Thanks.

The affordable one is seconds.
Around half price.
Small bashes and malforms, easily fixed with canned foam or cut off.

Google "rigid insulation board seconds"


Sounds to be a good option - I'll take a look when I get round to doing
the floors.

http://www.ebay.co.uk/itm/Celotex-Ri...em3f25d5 5626

£22/sheet for 50mm - that's usually as good as the price gets unless you get
really lucky with "seconds".

I have not bought any recently, but when I did my workshop a few years
back I was paying about £14 sheet IIRC. I get mine from:

http://www.apcowholesale.co.uk/index.html

They will deliver within a reasonable area.


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

On 10/11/2013 17:25, SteveW wrote:
On 10/11/2013 15:46, dennis@home wrote:
On 10/11/2013 11:35, RJH wrote:
On 10/11/2013 09:56, Peter Johnson wrote:
On Sun, 10 Nov 2013 08:20:58 +0000, RJH wrote:



Speaking with a friend, he's using it to fill cavities below ground. I
can see why, but he's relying on strength in compression (stop the
leaves pushing together), and I'd have thought there may be a bridging
risk. He also said you can lay flooring directly on top - doesn't
sound
right to me. But this was after 4 pints ;-)

In domestic use having 6in of polystyrene (or similar, presumably)
under the floor is a Building Regs requirement.


With the floor resting on top?


If you mean a concrete slab on top then yes.

Or a floating wooden floor.

SteveW


I wouldn't put timber on top of polystyrene, the fire risk and toxic gas
would make it bad.

On 10/11/13 18:58, dennis@home wrote:

I wouldn't put timber on top of polystyrene, the fire risk and toxic gas
would make it bad.
+1


--
Ineptocracy

(in-ep-toc-ra-cy) €“ a system of government where the least capable to
lead are elected by the least capable of producing, and where the
members of society least likely to sustain themselves or succeed, are
rewarded with goods and services paid for by the confiscated wealth of a
diminishing number of producers.

On 10/11/2013 18:58, dennis@home wrote:

I wouldn't put timber on top of polystyrene, the fire risk and toxic gas
would make it bad.

Proper PIR foam is fire retardant[1], and insulates better anyway.

[1] as is jablite etc to be fair.

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

On 10/11/13 19:36, John Rumm wrote:
On 10/11/2013 18:58, dennis@home wrote:

I wouldn't put timber on top of polystyrene, the fire risk and toxic gas
would make it bad.

Proper PIR foam is fire retardant[1], and insulates better anyway.

[1] as is jablite etc to be fair.

It flipping well aint.


--
Ineptocracy

(in-ep-toc-ra-cy) €“ a system of government where the least capable to
lead are elected by the least capable of producing, and where the
members of society least likely to sustain themselves or succeed, are
rewarded with goods and services paid for by the confiscated wealth of a
diminishing number of producers.

On Sunday 10 November 2013 16:39 fred wrote in uk.d-i-y:

For info, that's the current one off price at wickes so should be
beatable by a decent margin:

http://www.wickes.co.uk/invt/190544

They were doing discounts for purchases of 10 or more but not now.

That has improved - once Wickes were charging nearly £40 for the same!


--
Tim Watts Personal Blog: http://squiddy.blog.dionic.net/

http://www.sensorly.com/ Crowd mapping of 2G/3G/4G mobile signal coverage

On 10/11/2013 19:47, The Natural Philosopher wrote:
On 10/11/13 19:36, John Rumm wrote:
On 10/11/2013 18:58, dennis@home wrote:

I wouldn't put timber on top of polystyrene, the fire risk and toxic gas
would make it bad.

Proper PIR foam is fire retardant[1], and insulates better anyway.

[1] as is jablite etc to be fair.

It flipping well aint.

Its a building regs requirement the polystyrene is treated with flame
retardants these days.


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

On 10/11/2013 19:36, John Rumm wrote:
On 10/11/2013 18:58, dennis@home wrote:

I wouldn't put timber on top of polystyrene, the fire risk and toxic gas
would make it bad.

Proper PIR foam is fire retardant[1], and insulates better anyway.

[1] as is jablite etc to be fair.


Jabalite and PIR foam burn and produce toxic gases if there is another
fuel providing heat, as in a wooden floor.

sm_jamieson grunted in
:

On Saturday, November 9, 2013 10:13:45 PM UTC, Dave Liquorice wrote:
On Sat, 09 Nov 2013 21:07:50 +0000, Tim Watts wrote:

Hi, could anyone please suggest an affordable alternative to

celotex?
Or buy seconds.

+1

Yes, I've only ever bought seconds. Under the floor, in the walls. Of
course everyone cannot buy "seconds" ! Simon.

Why not? I've been very pleased with http://www.secondsandco.co.uk/ and
they deliver all over the place AFAIK

--
David

On 10/11/2013 15:46, dennis@home wrote:
On 10/11/2013 11:35, RJH wrote:

With the floor resting on top?


If you mean a concrete slab on top then yes.


or screed .... I have 65mm screed throughout with underfloor heating
pipes in the screed.

On 10/11/2013 09:56, Peter Johnson wrote:
On Sun, 10 Nov 2013 08:20:58 +0000, RJH wrote:



Speaking with a friend, he's using it to fill cavities below ground. I
can see why, but he's relying on strength in compression (stop the
leaves pushing together), and I'd have thought there may be a bridging
risk. He also said you can lay flooring directly on top - doesn't sound
right to me. But this was after 4 pints ;-)

In domestic use having 6in of polystyrene (or similar, presumably)
under the floor is a Building Regs requirement.



Not read all the thread .. but did a complete SelfBuild and had all of
my Celotex from 'Seconds & Co' saved a bundle on Bldrs Merchant price.