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Subject Topic: Damp readings. Post Reply Post New Topic
PersonScrancat
via mobile 06/7/2019 at 10:22pm
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Hi. Had an awning rail replaced and roof strap resealed last year after sudden water ingress in the rear corner of my van. My service last week showed damp readings of 30 in the previously damaged corner which was repaired.
I am unaware of any further water ingress and have been told that after resealing damp readings remain high for a while due to the sealed in moisture.
Can anybody with previous similar experience confirm this is normal and I shouldn’t have anything to worry about?
Thanks.


PersonSevenexile
via mobile 07/7/2019 at 10:14pm
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If the area wasn’t dried out then yes it can take a while for the readings to come down to a suitable level, specially if there is any structural timber that has also become wet. Using a small fan heater in that area on a medium heat will help. You say it was at 30% this service, what were the readings when it was first found? Also do you know what the readings were after the revealing work was carried out?


PersonScrancat
via mobile 07/7/2019 at 11:05pm
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Thanks for the reply. Van has always been serviced and never had signs of damp for 9 years. I don’t know the reading when the fault first occurred but the water was running down the back corner. I was told that after the repair I should expect the damp reading to be high at the next service.
I vented and heated the van through winter and spring and there was no further sign of water ingress.
Just a bit concerned at the reading of 30 six months later although I can possibly understand a highish reading given the repair involving replacing and resealing the awning rail and resealing the roof strap as this in theory could lock moisture in.
My concern is most information tells me a damp reading of 30 means structural damage is inevitable.
After the service I bought a cheap damp meter which gave a similar reading ( max 35 in top corner.)
Should I carry on venting and heating and just hope no serious problems persist?
I only have a high reading in the top corner offside of van and only a small area. The roof and back panel have readings below 10.
The bottom corner offside has a reading of just under 20 but this was the area where the water settled after the leak.
Elsewhere down the offside panel readings are around or just over 10.
I’m hoping by what you say and what I have assumed it’s wet structural timber in the top and bottom corner which has now been sealed in and should not spread or cause further issues and which should dry out in time.
Thanks.


PersonSevenexile
via mobile 08/7/2019 at 8:29am
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Ignore what you read about readings above 30% while it’s partly true every caravan will be different and there is not set level in my opinion as there are so many variables to take into consideration.

Who ever carried out the repair should of tested the van and made a record of it before doing the work. If you can keep hearing it for a bit and keep monitoring it with your damp meter


PersonWobbly Box
21/7/2019 at 9:20pm
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moisture will take years to dry out from behind a wallboard as the wallboards are usually coated with a moisture resistant coating, the decorative finish that you see.
Best to but a small circular vent about the size of a 10p cut it into the wallboard it will look ment if you do it right. this will allow the trapped moisture to escape. This trapped moisture can lead to further damage to timbers if left unattended.



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Personsooty
14/11/2019 at 10:20pm
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We had a reading of 30 in our caravan in the bathroom. There was also water drops visible on the wall. The fault was found to be where the roof and back meet, there was a gap that two fingers would go in. This has been repaired and although the water ingress is cured the readings have lowered at the service the following year. It does take time to dry out.

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* * Sue * *


PersonScrancat
via mobile 15/11/2019 at 1:11am
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Hi. Thanks for the reply. Sorry but are you saying the damp readings have or haven’t lowered. I’ve now had a cover on the van for 3 weeks and the readings are still the same. This encourages me as it suggest it is residual water as I can’t see how a covered can can still be leaking in any way.


PersonWobbly Box
30/11/2019 at 10:28pm
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Covers stop water ingress from rain, but can actually increase moisture levels if it’s not of a good quality breathable type. Just think of it as being the same as wearing a poly bag in the rain. You’ll be wet on the inside but not by any water penetrating the bag, but by the build up of moisture as it can’t escape.



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