UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions.

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Hi all,

Can anyone explain what kind of damp this is and what might be causing
it? There is nothing amiss or damaged on the outside of the building that
could account for it so I'm at a complete loss as to what the underlying
problem could be. Here's a pic:


http://oi66.tinypic.com/1zzgvn4.jpg

Thanks.



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On 17/07/2019 13:35, Dan Green wrote:
Hi all,

Can anyone explain what kind of damp this is and what might be causing
it? There is nothing amiss or damaged on the outside of the building that
could account for it so I'm at a complete loss as to what the underlying
problem could be. Here's a pic:


http://oi66.tinypic.com/1zzgvn4.jpg

Thanks.



Somehow managing to get around the door frame ?
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On Wed, 17 Jul 2019 14:37:57 +0100, ss wrote:

Somehow managing to get around the door frame ?


I can't see any defects with the sealant around the outside, though.

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"Dan Green" wrote in message
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Hi all,

Can anyone explain what kind of damp this is and what might be causing
it? There is nothing amiss or damaged on the outside of the building that
could account for it so I'm at a complete loss as to what the underlying
problem could be. Here's a pic:


http://oi66.tinypic.com/1zzgvn4.jpg

Thanks.



cold surface condensation ......?


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On 17/07/2019 13:35, Dan Green wrote:
Hi all,

Can anyone explain what kind of damp this is and what might be causing
it? There is nothing amiss or damaged on the outside of the building that
could account for it so I'm at a complete loss as to what the underlying
problem could be. Here's a pic:


http://oi66.tinypic.com/1zzgvn4.jpg

Thanks.



Getting in at the top of the frame (side or top surface) and dripping
down the voids in the frame. Building up at the bottom. Look for
pinholes in the sealant around the top.

Bill


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On Wednesday, 17 July 2019 13:35:26 UTC+1, Dan Green wrote:
Hi all,

Can anyone explain what kind of damp this is and what might be causing
it? There is nothing amiss or damaged on the outside of the building that
could account for it so I'm at a complete loss as to what the underlying
problem could be. Here's a pic:


http://oi66.tinypic.com/1zzgvn4.jpg


It could be water getting through bad pointing or cement rendering as well as the above.
It could be many feet above the door and dripping on to the cavity tray above the door & running off the end of it.

https://www.google.com/search?q=imag...e7lP-T_uMFB7M:
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On 17/07/2019 15:06, Jim GM4DHJ ... wrote:
"Dan Green" wrote in message
...
Hi all,

Can anyone explain what kind of damp this is and what might be causing
it? There is nothing amiss or damaged on the outside of the building that
could account for it so I'm at a complete loss as to what the underlying
problem could be. Here's a pic:


http://oi66.tinypic.com/1zzgvn4.jpg

Thanks.



cold surface condensation ......?


Perhaps, or common or garden rising damp but held back by an impervious
plaster, or plaster over tanked brickwork?
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Might only be apparent if the person actually takes off the interior
finishes etc..
Brian

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On 17/07/2019 15:06, Jim GM4DHJ ... wrote:
"Dan Green" wrote in message
...
Hi all,

Can anyone explain what kind of damp this is and what might be causing
it? There is nothing amiss or damaged on the outside of the building
that
could account for it so I'm at a complete loss as to what the underlying
problem could be. Here's a pic:


http://oi66.tinypic.com/1zzgvn4.jpg

Thanks.



cold surface condensation ......?


Perhaps, or common or garden rising damp but held back by an impervious
plaster, or plaster over tanked brickwork?



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On 17/07/2019 13:35, Dan Green wrote:
Hi all,

Can anyone explain what kind of damp this is and what might be causing
it? There is nothing amiss or damaged on the outside of the building that
could account for it so I'm at a complete loss as to what the underlying
problem could be. Here's a pic:


http://oi66.tinypic.com/1zzgvn4.jpg


Could be condensation, but also the ground level outside could be close
to the DPC. You may also get splashback from the hard surface.

(I had a similar problem here, which in the end I tracked down to a down
pipe from the gutter. It went straight into the ground, but did actuall
appear to be connected to the waste water pipe - stick a hose in the
gutter and it ended up arriving at the septic tank.

In the end I had a dig to investigate, and found the builders had
effected a transition from square downpipe, to 110mm soil pipe by
stopping the downpipe a bit above the soil pipe and "sealing" the gap
with a carrier bag! So a proportion of the water soaked straight into
the ground right next to the wall. So I figged a proper gully with trap,
and let the pipe empty into that. Replaced the rotten floor timbers, and
made sure they were not pressed right up against the wall this time.
Been fine since.


--
Cheers,

John.

/================================================== ===============\
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On 17/07/2019 15:40, newshound wrote:
Perhaps, or common or garden rising damp but held back by an impervious
plaster, or plaster over tanked brickwork?


Has rising damp not been debunked?

Everything credible that I read suggests that 'damp' comes from above
somehow.


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Dan Green wrote:
Hi all,

Can anyone explain what kind of damp this is and what might be causing
it? There is nothing amiss or damaged on the outside of the building that
could account for it so I'm at a complete loss as to what the underlying
problem could be. Here's a pic:


http://oi66.tinypic.com/1zzgvn4.jpg

Thanks.





Daughter had this in a rented place before she bought their own place. The
landlord got a damp survey and I was there when the surveyor did it as
daughter was at work.

He explained it was condensation. I was dubious and asked how he could
tell. The explanation was that, if the moisture came through the brickwork,
the minerals inhibited the black mould. The landlord installed one of those
heat exchange extractors- they warm the incoming air with the outgoing
(warm) air. It solved the problem.

You may not need to go as far as the extractor, just look at ventilation
and possibly a dehumidifier.

--
Corbyn & the EU, the Nazis next step: "Our aim was Europe a nation. Our
faith European Socialism" Mosley "My Life" autobiography 1957.
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On Wed, 17 Jul 2019 15:57:47 +0000, Brian Reay wrote:

He explained it was condensation. I was dubious and asked how he could
tell. The explanation was that, if the moisture came through the
brickwork,
the minerals inhibited the black mould. The landlord installed one of
those heat exchange extractors- they warm the incoming air with the
outgoing (warm) air. It solved the problem.


I don't see how it can possibly be condensation. The opposite side you
cannot see in this picture is as clean as a whistle yet it is as fully
exposed to the elements as the pictured one is.

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On 17/07/2019 15:40, newshound wrote:
On 17/07/2019 15:06, Jim GM4DHJ ... wrote:
"Dan Green" wrote in message
...
Hi all,

Can anyone explain what kind of damp this is and what might be causing
it? There is nothing amiss or damaged on the outside of the building
that
could account for it so I'm at a complete loss as to what the underlying
problem could be. Here's a pic:


http://oi66.tinypic.com/1zzgvn4.jpg

Thanks.



cold surface condensation ......?


Perhaps, or common or garden rising damp but held back by an impervious
plaster, or plaster over tanked brickwork?


rising damp only rises about three feet but there could be no vertical
or failed cavity dpc at the cavity closure at the door opening..
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On 17/07/2019 17:13, Dan Green wrote:
On Wed, 17 Jul 2019 15:57:47 +0000, Brian Reay wrote:

He explained it was condensation. I was dubious and asked how he could
tell. The explanation was that, if the moisture came through the
brickwork,
the minerals inhibited the black mould. The landlord installed one of
those heat exchange extractors- they warm the incoming air with the
outgoing (warm) air. It solved the problem.


I don't see how it can possibly be condensation. The opposite side you
cannot see in this picture is as clean as a whistle yet it is as fully
exposed to the elements as the pictured one is.


failed vertical cavity closure on one side then ....
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On 17/07/2019 16:48, R D S wrote:
On 17/07/2019 15:40, newshound wrote:
Perhaps, or common or garden rising damp but held back by an
impervious plaster, or plaster over tanked brickwork?


Has rising damp not been debunked?

Everything credible that I read suggests that 'damp' comes from above
somehow.


Not true.



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On 17/07/2019 13:35, Dan Green wrote:
Hi all,

Can anyone explain what kind of damp this is and what might be causing
it? There is nothing amiss or damaged on the outside of the building that
could account for it so I'm at a complete loss as to what the underlying
problem could be. Here's a pic:


http://oi66.tinypic.com/1zzgvn4.jpg

Thanks.




the original timber door had a vertical dpc which would have been nailed
to the vertical section of the frame and built into the two leaves of
the wall around the cavity closer.

When that UPVC door was fitted, the oik who removed the old wooden
frame may have pulled out this dpc and now any water getting past the
outer mastic seal is making the outer leaf of the wall (hidden by
the frame) damp and this is tranferring into the inner leaf and
causing the problem that is now apparent.

The only solution now is to make sure the mastic or low modulus
sealant is effective and free from holes.
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On 17/07/2019 17:27, Jim GM4DHJ ... wrote:
On 17/07/2019 17:13, Dan Green wrote:
On Wed, 17 Jul 2019 15:57:47 +0000, Brian Reay wrote:

He explained it was condensation. I was dubious and asked how he could
tell. The explanation was that, if the moisture came through the
brickwork,
the minerals inhibited the black mould. The landlord installed one of
those heat exchange extractors- they warm the incoming air with the
outgoing (warm) air. It solved the problem.


I don't see how it can possibly be condensation. The opposite side you
cannot see in this picture is as clean as a whistle yet it is as fully
exposed to the elements as the pictured one is.


failed vertical cavity closure on one side then ....


Yup, or a lump of mortar is bridging the cavity somewhere just above
where the damp is starting.
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On 17/07/2019 17:32, Andrew wrote:
On 17/07/2019 16:48, R D S wrote:
On 17/07/2019 15:40, newshound wrote:
Perhaps, or common or garden rising damp but held back by an
impervious plaster, or plaster over tanked brickwork?


Has rising damp not been debunked?

Everything credible that I read suggests that 'damp' comes from above
somehow.


Not true.


Clears that up then.
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On 17/07/2019 13:35, Dan Green wrote:
Hi all,

Can anyone explain what kind of damp this is and what might be causing
it? There is nothing amiss or damaged on the outside of the building that
could account for it so I'm at a complete loss as to what the underlying
problem could be. Here's a pic:


http://oi66.tinypic.com/1zzgvn4.jpg

Thanks.



It cpould be condenastion. but my gues iss as follows, having had fairly
similar issues.

Somewhere way up in yer cavity wall there is a leak, farily swmall - say
4mm diameter in some nastic etc..or an old TV aeial pulled out - and
water is running down in the cavity until it gets to that window, or te
door, which bridges the cavity ., stops it, and then its running off
the edge and down inisde the cavity by the door frame and pooling at the
bottom.

So look higher - much higher for where the leak is.

I used to get water dripping from my window frame tops onto the cills
from rotten bargeboards a storey above.





--
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Josef Stalin

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On 17/07/2019 16:48, R D S wrote:
On 17/07/2019 15:40, newshound wrote:
Perhaps, or common or garden rising damp but held back by an
impervious plaster, or plaster over tanked brickwork?


Has rising damp not been debunked?

Everything credible that I read suggests that 'damp' comes from above
somehow.


No. rsing damp exists and I had it badly. But it doesnt rise that far -
in general if you get a foot above the water table you are unfortunate.
My house when I demiolished it has softe red brick fireplaces and
chinsys sitting in what was a pool of aater after it rained under the
house.

Damp would appear and blow the plaster up to about 8" from the floor - 1
foot from the water. A previous cottage on the fens with a crap DPC and
a SOLID 4" brick wall was damp to a similar height in the kitchen until
I hard rendered it with cement



--
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kind word alone.

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On 17/07/2019 17:13, Dan Green wrote:
On Wed, 17 Jul 2019 15:57:47 +0000, Brian Reay wrote:

He explained it was condensation. I was dubious and asked how he could
tell. The explanation was that, if the moisture came through the
brickwork,
the minerals inhibited the black mould. The landlord installed one of
those heat exchange extractors- they warm the incoming air with the
outgoing (warm) air. It solved the problem.


I don't see how it can possibly be condensation. The opposite side you
cannot see in this picture is as clean as a whistle yet it is as fully
exposed to the elements as the pictured one is.

I agree. You have a leak a LONG way from where that is. Above the door
or the window. Could be right up at eaves level

Assuming a cavity wall.


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people
by telling poor people that "other" rich people are the reason they are
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On 17/07/2019 15:06, Jim GM4DHJ ... wrote:
"Dan Green" wrote in message
...
Hi all,

Can anyone explain what kind of damp this is and what might be causing
it? There is nothing amiss or damaged on the outside of the building that
could account for it so I'm at a complete loss as to what the underlying
problem could be. Here's a pic:


http://oi66.tinypic.com/1zzgvn4.jpg

Thanks.



cold surface condensation ......?


cold bridge to the outside leaf.....?
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On 17/07/2019 14:37, ss wrote:
On 17/07/2019 13:35, Dan Green wrote:
Hi all,

Can anyone explain what kind of damp this is and what might be causing
it? There is nothing amiss or damaged on the outside of the building that
could account for it so I'm at a complete loss as to what the underlying
problem could be. Here's a pic:


http://oi66.tinypic.com/1zzgvn4.jpg

Thanks.



Somehow managing to get around the door frame ?


....or down from the window...sure looks like water coming from the badly
fitted window or door....I would strip off the plasterboard and keep an
eye on it in wet weather.....that internal window sill looks like it is
running toward the window as well...and any water will be funnelled down
there ..wonder if the window/door has been fitted in the outer
leaf?...hard to tell...if so it could be in front of the cavity closure
and in front of the cavity closure of the lintel above.....need more photo's
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On 17/07/2019 18:05, R D S wrote:
On 17/07/2019 17:32, Andrew wrote:
On 17/07/2019 16:48, R D S wrote:
On 17/07/2019 15:40, newshound wrote:
Perhaps, or common or garden rising damp but held back by an
impervious plaster, or plaster over tanked brickwork?

Has rising damp not been debunked?

Everything credible that I read suggests that 'damp' comes from above
somehow.


Not true.


Clears that up then.


But it is NOT as prevalent as people think it is



--
"When one man dies it's a tragedy. When thousands die it's statistics."

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"Dan Green" wrote in message
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On Wed, 17 Jul 2019 14:37:57 +0100, ss wrote:

Somehow managing to get around the door frame ?


I can't see any defects with the sealant around the outside, though.


Worth hosing it on the outside to see if it leaks.



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On Thu, 18 Jul 2019 05:16:22 +1000, blatha, better known as cantankerous
trolling senile geezer Rodent Speed, wrote:


Worth hosing it on the outside to see if it leaks.


You'd better worry about the **** you are leaking here every day, senile
Rodent!

--
Marland answering senile Rodent's statement, "I don't leak":
"That¢s because so much **** and ****e emanates from your gob that there is
nothing left to exit normally, your arsehole has clammed shut through disuse
and the end of prick is only clear because you are such a ******."
Message-ID:
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Maybe already asked but is this a recent thing or has it been this way
for a while?
As someone already mentioned a few more clear images could help of both
external and internal.

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On 17/07/2019 18:33, The Natural Philosopher wrote:
On 17/07/2019 16:48, R D S wrote:
On 17/07/2019 15:40, newshound wrote:
Perhaps, or common or garden rising damp but held back by an
impervious plaster, or plaster over tanked brickwork?


Has rising damp not been debunked?

Everything credible that I read suggests that 'damp' comes from above
somehow.


No. rsing damp exists and I had it badly. But it doesnt rise that far -
in general if you get a foot above the water table you are unfortunate.


I thought the maximum was about 2m for rising damp? Which in part
explains why it's one of the most misdiagnosed causes of damp to
internal walls.

The OP's looks like condensation/cold bridging to me.

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On 17/07/2019 17:13, Dan Green wrote:
On Wed, 17 Jul 2019 15:57:47 +0000, Brian Reay wrote:

He explained it was condensation. I was dubious and asked how he could
tell. The explanation was that, if the moisture came through the
brickwork,
the minerals inhibited the black mould. The landlord installed one of
those heat exchange extractors- they warm the incoming air with the
outgoing (warm) air. It solved the problem.


I don't see how it can possibly be condensation. The opposite side you
cannot see in this picture is as clean as a whistle yet it is as fully
exposed to the elements as the pictured one is.


Moisture that side of the wall can evaporate. On the inside, warm air
hits cold wall, and the moisture in the air condenses. Ventilation may
be an issue too. The spores may have got into the plaster, and that part
of the wall is locked in a cycle of mould.

Possibly. In the absence of another explanation it might be worth taking
it back to brick and replacing the browning/plaster with something a bit
more mould inhibiting, or if there's room, dry lining that portion of
the internal wall.

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Cheers, Rob
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On Wednesday, 17 July 2019 13:35:26 UTC+1, Dan Green wrote:
Hi all,

Can anyone explain what kind of damp this is and what might be causing
it? There is nothing amiss or damaged on the outside of the building that
could account for it so I'm at a complete loss as to what the underlying
problem could be. Here's a pic:


http://oi66.tinypic.com/1zzgvn4.jpg

Thanks.


Condensation is most probable, though there are other maybes. Why one side only? Probably differing insulation or bridging in the wall.

Solution? Dehumidifier.


NT


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On 18/07/2019 02:32, RJH wrote:
On 17/07/2019 18:33, The Natural Philosopher wrote:
On 17/07/2019 16:48, R D S wrote:
On 17/07/2019 15:40, newshound wrote:
Perhaps, or common or garden rising damp but held back by an
impervious plaster, or plaster over tanked brickwork?

Has rising damp not been debunked?

Everything credible that I read suggests that 'damp' comes from above
somehow.


No. rsing damp exists and I had it badly. But it doesnt rise that far
- in general if you get a foot above the water table you are unfortunate.


I thought the maximum was about 2m for rising damp? Which in part
explains why it's one of the most misdiagnosed causes of damp to
internal walls.

The OP's looks like condensation/cold bridging to me.

that is what I originally thought.....
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R D S wrote :
Has rising damp not been debunked?


No, rising damp can still be an issue - the thing is not all damp is of
the rising variety. Sometimes it is lifestyle condensation, sometimes
water igngress through walls, rooves, or gutters leaking.


Everything credible that I read suggests that 'damp' comes from above
somehow.

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On 17/07/2019 13:35, Dan Green wrote:
Hi all,

Can anyone explain what kind of damp this is and what might be causing
it? There is nothing amiss or damaged on the outside of the building that
could account for it so I'm at a complete loss as to what the underlying
problem could be. Here's a pic:


http://oi66.tinypic.com/1zzgvn4.jpg


Frame drainage blocked so water finding it's way out via plastic welded
mitre joint in corner, or tracking through a frame fixing screw or
running along frame DPC until it gets to the corner?
Combination of the above?

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On 17/07/2019 19:24, The Natural Philosopher wrote:
On 17/07/2019 18:05, R D S wrote:
On 17/07/2019 17:32, Andrew wrote:
On 17/07/2019 16:48, R D S wrote:
On 17/07/2019 15:40, newshound wrote:
Perhaps, or common or garden rising damp but held back by an
impervious plaster, or plaster over tanked brickwork?

Has rising damp not been debunked?

Everything credible that I read suggests that 'damp' comes from
above somehow.

Not true.


Clears that up then.


But it is NOT as prevalent as people think it is




I wonder how prevalent it actually is?

In that I wonder how many people have stumped up for a DPC, as a ratio
of those who actually needed one,
After a [cough] expert has been round their gaff with one of those
things with a pair of probes on it.
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On Thu, 18 Jul 2019 02:38:36 +0100, RJH wrote:

Moisture that side of the wall can evaporate. On the inside, warm air
hits cold wall, and the moisture in the air condenses. Ventilation may
be an issue too. The spores may have got into the plaster, and that part
of the wall is locked in a cycle of mould.


Sorry, you misunderstood but it's my fault having re-read what I wrote.
When I said the "opposite" side of the wall I meant the mirror image as
it were; the other *internal* wall side.


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On 18/07/2019 12:09, www.GymRatZ.co.uk wrote:


Frame drainage blocked so water finding it's way out via plastic welded
mitre joint in corner, or tracking through a frame fixing screw or
running along frame DPC until it gets to the corner?
Combination of the above?


Surely something along those lines,

Looks too localised to be coming from underneath.
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On 17/07/2019 16:48, R D S wrote:
On 17/07/2019 15:40, newshound wrote:
Perhaps, or common or garden rising damp but held back by an
impervious plaster, or plaster over tanked brickwork?


Has rising damp not been debunked?


Not debunked as such, but it has been identified that it is far less
common than the number of diagnosis of it would seem to suggest.

Everything credible that I read suggests that 'damp' comes from above
somehow.


Also through and up are options.

--
Cheers,

John.

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