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Subject Topic: Severe damp edge of roof. Post Reply Post New Topic
via mobile 19/4/2019 at 8:00pm
 Location: Notts.
 Outfit: Avodale Dart 525-4 2007
View russdcycle's Profile View Profile   Reply to russdcycle Reply   Quote russdcycle Quote  
Joined: 21/3/2017

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I bought a caravan and new it had severe damp from a break in the grp panel on the back edge of the roof. Today I decided to remove the joining strip on the roof and rear section of awning rail. The culprit piece of grp that is broken has been fixed badly with glue. Anyway I took said piece off and the roof rail is completely rotten. I have lifted back the ally roof sheet slightly and scraped the rot out. My intention on Sunday is to fill the wood gap with expanding foam approx 6 inches long.Refix the small grp piece and reseal rail and joining piece and monitor through the season before takling the interior. Has anyone used expanding foam before? It might be just temporary and renew wood from inside after everything is dry.


20/4/2019 at 9:48am
 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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Some have tried expanding builders type foam in spongy floor fixes instead of using the recognised one-shot or two-shot proprietory materials, probably due to cost but it can have it's problems.

I don't think it has the same inherant strength but more importantly it is quite an aggressive foam mixture when released and needs careful use or it will bulge out the area being worked on or be forced into areas were it was not intended to go into.

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.


20/4/2019 at 10:58am
 Location: None Entered
 Outfit: None Entered
View trog100's Profile View Profile   Reply to trog100 Reply   Quote trog100 Quote  
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expanding foam should be seen as a gap filler more than anything else..

trog



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