Just taken delivery of a number of Celotex GA4000 PIR insulation boards and, as shown in the photo below, the 100mm boards in the foreground are extremely wrinkled one foil face, particularly when compared with the completely smooth 30mm and 12mm boards in the background:

http://www.newtonnet.co.uk/permanent/celotex.jpg

The 100mm boards also have an ever so slight bow to them; not enough to cause me an issue but I wondered if the bowing and wrinkles were the result of differential shrinkage within the core?

Any cause for concern?

On 13/03/2019 20:49, Mathew Newton wrote:
Just taken delivery of a number of Celotex GA4000 PIR insulation boards and, as shown in the photo below, the 100mm boards in the foreground are extremely wrinkled one foil face, particularly when compared with the completely smooth 30mm and 12mm boards in the background:

http://www.newtonnet.co.uk/permanent/celotex.jpg

The 100mm boards also have an ever so slight bow to them; not enough to cause me an issue but I wondered if the bowing and wrinkles were the result of differential shrinkage within the core?

Any cause for concern?

been left out in the cold thats all.

delta expansion coefficients


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(or environmental activism) is becoming a general ideology about humans,
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a matter of elementary environmental protection, or a search for
rational mechanisms designed to achieve a healthy environment. Yet
things do occur that make you shake your head and remind yourself that
you live neither in Joseph Stalins Communist era, nor in the Orwellian
utopia of 1984.€�

Vaclav Klaus

Mathew Newton Wrote in message:
Just taken delivery of a number of Celotex GA4000 PIR insulation boards and, as shown in the photo below, the 100mm boards in the foreground are extremely wrinkled one foil face, particularly when compared with the completely smooth 30mm and 12mm boards in the background:

http://www.newtonnet.co.uk/permanent/celotex.jpg

The 100mm boards also have an ever so slight bow to them; not enough to cause me an issue but I wondered if the bowing and wrinkles were the result of differential shrinkage within the core?

Any cause for concern?


Are the wrinkles on the "inside" of the bow iyswim?

I wonder if they'll come right after temps have stabilised across
/through them?
--
Jim K


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http://usenet.sinaapp.com/

On Wednesday, 13 March 2019 21:18:51 UTC, JimK wrote:

Are the wrinkles on the "inside" of the bow iyswim?

Yes, so it does correlate with potential shrinkage of that face (or the material closer to it than the other side.

I wonder if they'll come right after temps have stabilised across/through them?

Maybe so, although I was going to fit them on Friday so don't have long to wait! I think I was more wondering if I should be raising it with the supplier (which I have just done, but more as an enquiry than threatening a rejection or anything).

On Wednesday, 13 March 2019 21:15:10 UTC, The Natural Philosopher wrote:

been left out in the cold thats all.

delta expansion coefficients

Okay, that's reassuring.

I thought the first response was going to be an straight up "Shocking. I wouldn't even accept them as seconds!" or something along those lines!

Mathew Newton Wrote in message:
On Wednesday, 13 March 2019 21:18:51 UTC, JimK wrote:

Are the wrinkles on the "inside" of the bow iyswim?

Yes, so it does correlate with potential shrinkage of that face (or the material closer to it than the other side.

I wonder if they'll come right after temps have stabilised across/through them?

Maybe so, although I was going to fit them on Friday so don't have long to wait! I think I was more wondering if I should be raising it with the supplier (which I have just done, but more as an enquiry than threatening a rejection or anything).


Well, after all once they're in & doing their job they'll be
trying to do the same thing...
--
Jim K


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On 13/03/2019 20:49, Mathew Newton wrote:

I thought you were talking about /cellulite/ until I re-read the subject
line (a female preoccupation that appears to have been invented in the
late 60s).

--
Max Demian

On 13/03/2019 20:49, Mathew Newton wrote:
Just taken delivery of a number of Celotex GA4000 PIR insulation boards and, as shown in the photo below, the 100mm boards in the foreground are extremely wrinkled one foil face, particularly when compared with the completely smooth 30mm and 12mm boards in the background:

http://www.newtonnet.co.uk/permanent/celotex.jpg

The 100mm boards also have an ever so slight bow to them; not enough to cause me an issue but I wondered if the bowing and wrinkles were the result of differential shrinkage within the core?

Any cause for concern?

Not at all IMHO.


--
Cheers,

John.

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

On 13/03/2019 20:49, Mathew Newton wrote:
Just taken delivery of a number of Celotex GA4000 PIR insulation
boards and, as shown in the photo below, the 100mm boards in the
foreground are extremely wrinkled one foil face, particularly when
compared with the completely smooth 30mm and 12mm boards in the
background:

http://www.newtonnet.co.uk/permanent/celotex.jpg

The 100mm boards also have an ever so slight bow to them; not enough
to cause me an issue but I wondered if the bowing and wrinkles were
the result of differential shrinkage within the core?

Any cause for concern?

My only concern would be damage to the wrinkles, which of course would
make the foil face porous.

"Max Demian" wrote in message
o.uk...
On 13/03/2019 20:49, Mathew Newton wrote:

I thought you were talking about /cellulite/ until I re-read the subject
line (a female preoccupation that appears to have been invented in the
late 60s).

Nope, just named then.

On Wednesday, 13 March 2019 21:15:10 UTC, The Natural Philosopher wrote:
On 13/03/2019 20:49, Mathew Newton wrote:
Just taken delivery of a number of Celotex GA4000 PIR insulation boards and, as shown in the photo below, the 100mm boards in the foreground are extremely wrinkled one foil face, particularly when compared with the completely smooth 30mm and 12mm boards in the background:

http://www.newtonnet.co.uk/permanent/celotex.jpg

The 100mm boards also have an ever so slight bow to them; not enough to cause me an issue but I wondered if the bowing and wrinkles were the result of differential shrinkage within the core?

Any cause for concern?

been left out in the cold thats all.

delta expansion coefficients

Well, if that's so, they will flatten out spontaneously as they equalise.

I have had lots of this insulation and never seen this sort of thing.
I have never seen visible expansion.
I have seen concave edges but not enough to matter.

It's closed cell structure so shouldn't absorb water either.

It may not matter, depending on application and how small you are cutting it up.

On Wednesday, 13 March 2019 21:18:51 UTC, JimK wrote:
Mathew Newton Wrote in message:
Just taken delivery of a number of Celotex GA4000 PIR insulation boards and, as shown in the photo below, the 100mm boards in the foreground are extremely wrinkled one foil face, particularly when compared with the completely smooth 30mm and 12mm boards in the background:

http://www.newtonnet.co.uk/permanent/celotex.jpg

The 100mm boards also have an ever so slight bow to them; not enough to cause me an issue but I wondered if the bowing and wrinkles were the result of differential shrinkage within the core?

Any cause for concern?


Are the wrinkles on the "inside" of the bow iyswim?

I wonder if they'll come right after temps have stabilised across
/through them?
--
Think about it.
They are intended to go where it's hot on one side and cold on the other.

They seem to have a lot of seconds judging by the market. Usually they have voids in the foam or mechanical damage.

And leaned against a wall probably, if they are bowed.
I often wonder though, if these insulation panels are supposed to insulate,
how come they can show this sort of effect if cold on one side, rather makes
you wonder about their long term integrity.
I cannot see the picture, but have heard of this before and it jogged my
mind.

Brian

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Note this Signature is meaningless.!
"Mathew Newton" wrote in message
...
On Wednesday, 13 March 2019 21:15:10 UTC, The Natural Philosopher wrote:

been left out in the cold thats all.

delta expansion coefficients

Okay, that's reassuring.

I thought the first response was going to be an straight up "Shocking. I
wouldn't even accept them as seconds!" or something along those lines!

On Wednesday, 13 March 2019 20:49:27 UTC, Mathew Newton wrote:
Just taken delivery of a number of Celotex GA4000 PIR insulation boards and, as shown in the photo below, the 100mm boards in the foreground are extremely wrinkled one foil face, particularly when compared with the completely smooth 30mm and 12mm boards in the background:

http://www.newtonnet.co.uk/permanent/celotex.jpg

The 100mm boards also have an ever so slight bow to them; not enough to cause me an issue but I wondered if the bowing and wrinkles were the result of differential shrinkage within the core?

Any cause for concern?

slight wrinkling like that is immaterial


NT

On 14/03/2019 01:06, Rod Speed wrote:


"Max Demian" wrote in message
o.uk...
On 13/03/2019 20:49, Mathew Newton wrote:

I thought you were talking about /cellulite/ until I re-read the
subject line (a female preoccupation that appears to have been
invented in the late 60s).

Nope, just named then.

'...in the late 1960s, with the earliest reference in Vogue magazine,
"Like a swift migrating fish, the word cellulite has suddenly crossed
the Atlantic."' - Wikipedia

....so no-one bothered about it until someone invented a word for it.

--
Max Demian

Max Demian wrote
Rod Speed wrote
Max Demian wrote
Mathew Newton wrote

I thought you were talking about /cellulite/ until
I re-read the subject line (a female preoccupation
that appears to have been invented in the late 60s).

Nope, just named then.

'...in the late 1960s, with the earliest reference in Vogue magazine,
"Like a swift migrating fish, the word cellulite has suddenly crossed
the Atlantic."' - Wikipedia

...so no-one bothered about it until someone invented a word for it.

Wrong, as always. And crossing the atlantic isnt inventing anyway.

On Fri, 15 Mar 2019 04:57:09 +1100, cantankerous trolling senile geezer Rot
Speed blabbered, again:



'...in the late 1960s, with the earliest reference in Vogue magazine,
"Like a swift migrating fish, the word cellulite has suddenly crossed
the Atlantic."' - Wikipedia

...so no-one bothered about it until someone invented a word for it.

Wrong, as always.

Post your PROOF, you all-knowing psychopathic swine!

--
pamela about Rot Speed:
"His off the cuff expertise demonstrates how little he knows..."
MID:

On Wednesday, 13 March 2019 20:49:27 UTC, Mathew Newton wrote:

http://www.newtonnet.co.uk/permanent/celotex.jpg

The 100mm boards also have an ever so slight bow to them; not enough to cause me an issue but I wondered if the bowing and wrinkles were the result of differential shrinkage within the core?

Any cause for concern?

Thanks everyone for the comments. It seems the vast majority thought it was a non-issue. I heard back from Celotex Technical Support and they said:

'In regards to the facer issue occasionally the facer can have a crinkled appearance as a result of the manufacturing process but should be consider to be an aesthetic issue only. Whilst the visual appearance of these boards is not aesthetically pleasing they continue to be suitable. The thermal value and structural integrity of the boards is unaffected and they remain fit for their intended purpose as thermal insulation.'

The supplier said similar and they also offered to replace any bowed boards should they be a problem for my application but the bowing is only slight (10mm over the full length) and so I don't think that'll be necessary.