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Subject Topic: Damp underneath! Post Reply Post New Topic
PersonGapant
17/4/2013 at 11:49pm
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Hi I have 2007 caravan & have discovered at the rear underneath in both back corner signs of water damage (which does appear to have had some DIY maintenance!) When left to dry it does just that & doesn't appear to be all the way through just the top layers of what appears to me to be plywood.

Any advice for a more permanent DIY job or am I looking at having to pay out to a company?

Any advice greatly appreciated as I do not have the finance for the latter!


PersonOpensauce
18/4/2013 at 6:53am
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Provided the water leak has been fixed, a diy repair with Isopon P40 is going to be a lot cheaper than paying somebody to do much the same thing.


Personmarksellshere
18/4/2013 at 11:08am
 Location: boston
 Outfit: swift challenger 490sel View marksellshere's Profile View Profile   Reply to marksellshere Reply   Quote marksellshere Quote  
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My swift used to get wet underneath on the back corners and it started to lift the ply, one wet afternoon i got a brolly and sat trying to work out why the wet patch was there and found that the water followed the awning rail infill down the rail and where the manufactures held it in place by way of bending under and tacking with a nail the water followed. All i did was trimof the excess rail infill and hey presto no damp underneath.
Must admit i didnt treat the area so might do that one weekend soon.

Hope it helps
Mark

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marksellshere


Personfleetwood99
18/4/2013 at 4:29pm
 Location: lancs
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Same as Mark, found that when it rained the water ran down the awning rail and rather than dropping off onto the ground, it ran onto the bottom of the back panel, then tracked along until it wet the ply. My quick fix was to shape some silicon sealant into an icicle shape just below the awning rail, so that the rain follows on and drips onto the floor


Personimpster
19/4/2013 at 9:56am
 Location: Mid Wales
 Outfit: Swift Fairway 490 5 View impster's Profile View Profile   Reply to impster Reply   Quote impster Quote  
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Funnily enough, I did exactly the same thing on ours last weekend - as described, water/rain comes down the awning rail, and creeps onto the plywood floor. What I did was put a bead of silicon about 3" long so that the water creeps onto that and can't get to the ply before dripping off.


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PersonGapant
02/6/2013 at 5:58pm
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Thank you all for the advice I now feel very reassured.


Personkmcateer
08/10/2020 at 9:57am
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 Outfit: Swift Challenger 530SE 2004 View kmcateer's Profile View Profile   Reply to kmcateer Reply   Quote kmcateer Quote  
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Just found this site all and have discovered exactly the same issue. I even had an engineer come out to remove the C200 (on Swift Challenger 530 2004) yesterday to check everything ok. The some troubleshooting revealed exactly this issue with water running down the rails and onto the base ply boards causing outside layer to get damp. Hope to dry it out later with hairdryer (yes), ensure I pary it slightly nose down from now on, allowing roof water to run off the front, and apply some of the simple techniques you have all shared. Super. Pictures to follow


moorlander999
08/10/2020 at 12:09pm
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I had a similar ''damp'' problem with our bailey...Wet patches on the underside of the floor at each rear corner...Found out it was the gaskets on the rear grab handles had perished...No damage to wood ( as van sleeps indoors when not in use ) but had noticed water dripping from underside when raining ...Must have caught it in time...New gaskets and dabs of low modulus silicone on each one before refitting and no issues since .


PersonPickled Onion
08/10/2020 at 12:44pm
 Location: Near Alton Towers
 Outfit: Bailey Burgundy S7 H View Pickled Onion's Profile View Profile   Reply to Pickled Onion Reply   Quote Pickled Onion Quote  
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I had a similar problem on my Bailey, a pre-Alutech one. The bottom track where the draught skirt fits didn't go the full length of the van due to the plastic end caps at each end. It left a gap of about 3 to 4 inches where rain water just ran down the sides and underneath onto the floor ply. I fitted a piece of vertical plastic strip in that area to force the water to drop off instead.

I also wasn't pleased with the moulding at the bottom of the back panel either. Most of it had a moulded raised lip that encourages water to drip off but once again, not all the way along, leaving the cornrers vulnerable to damp every time it rained. I therefore added some 90 degree plastic strips that were glued in place under the lip of the back panel bottom edge, I used Soudal RV61 to do all this. Rainwater now drips off properly and doesn't run underneath when stationary.

Dave.

-------------
Give a man a fish and he will eat for a day,
Teach a man to fish and you can get rid of him for a whole weekend.


PersonMick S.
08/10/2020 at 7:40pm
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These 'corner rail' repairs sound conclusive, but.....the underside still gets soaked through when travelling in the rain. How is this being mitigated, if altering the course of a rail appears to cure any ills?


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PersonPickled Onion
10/10/2020 at 1:58pm
 Location: Near Alton Towers
 Outfit: Bailey Burgundy S7 H View Pickled Onion's Profile View Profile   Reply to Pickled Onion Reply   Quote Pickled Onion Quote  
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Quote: Originally posted by Mick S. on 08/10/2020
These 'corner rail' repairs sound conclusive, but.....the underside still gets soaked through when travelling in the rain. How is this being mitigated, if altering the course of a rail appears to cure any ills?


There is no way to stop it from getting wet underneath when traveling, and you don't need to. The thing is, it gives the wood underneath time to dry out between journeys. The black paint underneath is only emulsion so that it CAN breathe and dry out but, if for one reason or another it stays wet, it will inevitably rot.

Dave.

-------------
Give a man a fish and he will eat for a day,
Teach a man to fish and you can get rid of him for a whole weekend.



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