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Damp Problems

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Damp Problems
15 March 2008, 11:54 PM
skid
Joined 15 Mar 2008
4 posts

Hi, I have noticed what appears to be a damp patch on the ceiling of my 1995 Bessacarr, where the ceiling meets the side wall on the offside of the caravan. There are signs of mould and the ceiling is a bit spongy. I can see no obvious place where water would get in, so would I be right to assume that it is probably the awning rail that needs re-sealing? Any advice would be much appreciated, thanks.
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Damp Problems
16 March 2008, 7:40 AM
-  Edited by keith 16 March 2008, 8:00 AM
keith
Joined 7 Feb 2005
1177 posts

Chances are it is the awning rail.
If you get a damp meter & test the van you'll have a clear indication of the extent of the ingress & just where it is getting in.
If u can't borrow one, u can buy one off ebay or at B&Q for around a tenner.


___________________

N.E. Leisure products, registered Purpleline northern distributor, supply only or supply & fit at your door Enduro & Truma range of motor movers, many caravan spares available, contact me for details at http://www.neleisureproducts.co.uk or [Log in to view email]
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Damp Problems
16 March 2008, 7:36 PM
-  Edited by skid 16 March 2008, 7:40 PM
skid
Joined 15 Mar 2008
4 posts

Thanks for the info Keith. I don't really understand the construction of the roof / side walls so what sort of damage would this have caused? Is it a matter of making it watertight and then just leaving it to dry out or will more extreme repairs be required? Also, just what is behind the awning rail which is causing water to penetrate? Sorry for all the questions!!!
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Damp Problems
17 March 2008, 1:06 PM
linda
Joined 8 Aug 2007
37 posts

go to http://www.mcea.co.uk and phone you local engineer
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Damp Problems
17 March 2008, 6:29 PM
-  Edited by keith 17 March 2008, 6:47 PM
keith
Joined 7 Feb 2005
1177 posts

The side walls are a bonded sandwich of polystyrene with aluminium, or in rare cases (like an Abbey) fibreglass on the outside & plywood on the inside.
The roof is not bonded so if you get up a ladder & take a look it seems a bit floppy, as the ally has just been unrolled across it during manufacture then screwed down around the edges. (the polystyrene is still used as a sandwich though)

Some foreign manufacturers have been using bonded roofs for some yrs, mainly the Germans with the hobby & Burstner models as examples.
Bailey started using bonded roofs in the last couple of yrs on their Senator range they claimed you could happily walk on it & theres even a newspaper article with a pic of their managing director & 5 employees standing on one.

If u trace the damp to the awning rail it will need to be removed, then have all of the old mastic removed, as its breaking down, then new mastic is used to reseal the rail.
Mastic on a roll is a godsend when doing a rail, its far less messy than normal mastic in a tube.
If the damp is detected early enough with the modern materials used on its construction it should just dry out, but if its gone too far & its really spongy the ply should be cut out in a big enough area to encompass all of the damp, then the polystyrene removed & new fitted, then new ply fitted.


___________________

N.E. Leisure products, registered Purpleline northern distributor, supply only or supply & fit at your door Enduro & Truma range of motor movers, many caravan spares available, contact me for details at http://www.neleisureproducts.co.uk or [Log in to view email]
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Damp Problems
17 March 2008, 10:04 PM
skid
Joined 15 Mar 2008
4 posts

Thanks once again for the explanation..... it all makes a lot more sense now!!! I will follow your advice and report back in due course.
Discussion Archived

Damp Problems
24 March 2008, 7:26 PM
skid
Joined 15 Mar 2008
4 posts

OK, I've had a closer look at the awning rail which is in 3 sections and is held in place by screws and staples. My question is do I need to replace the staples or will new mastic and just the screws be sufficient?
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