Hymer B644: Rotten timer under garage floor at rear corner

Discussion in 'Hymer' started by scotjimland, May 11, 2016.

  1. scotjimland

    scotjimland Funster Life Member

    Joined:
    Jul 25, 2007
    Messages:
    28,995
    Likes Received:
    25,691
    Location:
    Suffolk
    Was alerted to this potential problem by Philip, @JeanLuc and only just got round to investigating.. Once I started poking with a screwdriver I found the problem..

    It's the rear corner under the garage floor.. which is a sandwich construction.. the timer is the frame..

    Have scrapped away most of the soft wood.. but it's still damp, it also looks like woodworm.. :eek:

    wondering what's the best way forward.. replacing the timber would be big job.. that would be the best solution.. but was thinking on cutting it back to dry timber and treating then covering over with marine ply.. basically bodge it..

    (sensible) suggestions please.. this area is about 9" x 6" IMG_0116.jpg
     
  2. Robert Clark

    Robert Clark Funster Life Member

    Joined:
    Jul 12, 2014
    Messages:
    6,851
    Likes Received:
    12,999
    Location:
    East Sussex
    Sorry you've found some damp Jim
    Could you scrape back the rotten bits then fill and smooth with an exterior grade filler?
    You could also pre treat with a good wood preservative
     
    • Like it Like it x 1
    • Thanks Thanks x 1
  3. icantremember

    icantremember Funster

    Joined:
    Sep 2, 2010
    Messages:
    5,457
    Likes Received:
    7,555
    Location:
    Nr Watton in Norfolk
    Hi Jim, I think could treat the area after geting rid of the damaged timber and damp with a wood hardener (Ronseal & Cuprinol) used to do a product ... you could then glass fibre the whole area.
     
    • Like it Like it x 2
    • Thanks Thanks x 1
  4. Ivory55

    Ivory55 Funster

    Joined:
    May 23, 2012
    Messages:
    1,011
    Likes Received:
    1,707
    Location:
    North West Norfolk
    Sorry to hear you have damp. Years ago we had problems with a caravan and due to moisture the aluminium went white powder on the inside and left pin holes in it. Not know if you have aluminium panels in a hymer, if you do it might be worth looking. Hope it's not to bad of a job.
     
    • Thanks Thanks x 1
  5. John Laidler

    John Laidler Funster

    Joined:
    Jan 9, 2013
    Messages:
    9,069
    Likes Received:
    12,424
    Location:
    Plympton, Devon
    I too can recommend the hardner stuff you paint on rotten wood. It won't restore much strength but it will seal it and stop the rot. Then another bit of ply over the top perhaps?
     
    • Thanks Thanks x 1
  6. hilldweller

    hilldweller Funster Life Member

    Joined:
    Dec 5, 2008
    Messages:
    27,771
    Likes Received:
    26,862
    Location:
    Macclesfield
    I've done a lot of work with glass fibre over the years, it's saved my Burstner. Sort of, cut back to solid timber, dry out ( this took 2 months ) then knit it all together with glass cloth for strength and wood to add needed thickness. All this in pretty tight conditions.
     
    • Thanks Thanks x 1
    • Useful Useful x 1
  7. Boringfrog

    Boringfrog Funster

    Joined:
    Jul 13, 2008
    Messages:
    1,344
    Likes Received:
    681
    If it's still wet you need to find where it's coming from/getting in.
     
    • Like it Like it x 2
    • Thanks Thanks x 1
  8. iandsm

    iandsm Funster

    Joined:
    Jan 3, 2008
    Messages:
    1,707
    Likes Received:
    2,844
    Location:
    Suffolk
    I am sure you can repair it once back to good wood but can you eliminate the cause of it?

    Pipped at the post by the previous one which came on while I was typing. I wouldn't worry about putting ply over the area it would make a decent strong repair
     
    • Thanks Thanks x 1
  9. scotjimland

    scotjimland Funster Life Member

    Joined:
    Jul 25, 2007
    Messages:
    28,995
    Likes Received:
    25,691
    Location:
    Suffolk
    I think the water ingress comes from below .. spray from the rear wheel.. there is no damp on the floor or walls inside.

    some good ideas.. thanks

    will post as the bodge progresses
     
    Last edited: May 11, 2016
    • Like it Like it x 1
  10. Ivory55

    Ivory55 Funster

    Joined:
    May 23, 2012
    Messages:
    1,011
    Likes Received:
    1,707
    Location:
    North West Norfolk
    If it's spray from the wheels is it worth when fixed looking at spray suppression mud flaps like on trucks. I know fine mist water gets everywhere.
     
    • Like it Like it x 1
  11. scotjimland

    scotjimland Funster Life Member

    Joined:
    Jul 25, 2007
    Messages:
    28,995
    Likes Received:
    25,691
    Location:
    Suffolk

    thanks .. never knew there was such a product.. looks like the way to go..

    http://www.screwfix.com/p/ronseal-wet-rot-wood-hardener-clear-500ml/63540
     
    • Like it Like it x 1
  12. icantremember

    icantremember Funster

    Joined:
    Sep 2, 2010
    Messages:
    5,457
    Likes Received:
    7,555
    Location:
    Nr Watton in Norfolk
    • Like it Like it x 1
  13. Lenny HB

    Lenny HB Funster

    Joined:
    Oct 18, 2007
    Messages:
    6,952
    Likes Received:
    6,841
    Location:
    West Sussex
    You should know better Jim Hymer & damp are two words you are not allowed to mention in the same sentence (dam done it again).:)

    Doesn't look too serious obviously not been using it enough to get woodworm! As @hilldweller says once dried out should be easy to treat with resin then build up with glass mat and resin.
     
    • Like it Like it x 2
    • Funny Funny x 1
  14. Techno

    Techno Funster Life Member

    Joined:
    Jul 28, 2010
    Messages:
    14,224
    Likes Received:
    15,205
    Location:
    Leeds the one up North
    I'm sure you'll do a great job of it don't we know :cool:
     
    • Funny Funny x 1
  15. scotjimland

    scotjimland Funster Life Member

    Joined:
    Jul 25, 2007
    Messages:
    28,995
    Likes Received:
    25,691
    Location:
    Suffolk
    yes.. I thought it would have had more sarcastic comments.. but it's early days .. :LOL:
     
    Last edited: May 11, 2016
    • Funny Funny x 1
  16. Boringfrog

    Boringfrog Funster

    Joined:
    Jul 13, 2008
    Messages:
    1,344
    Likes Received:
    681
    Is the floor inside bare wood or does it have some covering. Give it a good press to see if it's spongy.
     
  17. JeanLuc

    JeanLuc Funster

    Joined:
    Nov 17, 2008
    Messages:
    2,946
    Likes Received:
    1,962
    Location:
    Warwickshire
    Sorry to hear you have the problem Jim. I would make a booking with Peter Hambilton. He fixed ours by cutting out and replacing the damaged section, then re-sealing it all. You would not know it has been repaired. He will do a first class job and you will have the security of knowing he is a Hymer repair expert. He has a courtesy car that you can use and it will probably be an overnight stop to ensure everything is properly dried and set before you leave. We stayed at a nearby CS the night before taking it in, and at Preston South Premier Inn for the following night which is really cheap if you book on-line well in advance. Preston has interesting history and is worth a visit in my view.
    Hymer Motorhomes and Hymer Motor Caravans from Hambilton Engineering Ltd Preston Uk - home page
     
    • Like it Like it x 3
    • Thanks Thanks x 1
    • Useful Useful x 1
  18. Kim H

    Kim H Funster Life Member

    Joined:
    Aug 24, 2011
    Messages:
    270
    Likes Received:
    509
    Location:
    Lancashire
    Is this something which would be discovered during a damp check? The reason I ask is that Peter performed a damp check for us last summer and the only place that gave a reading that warranted further investigation was the T join on the roof above the drop down bed. Thankfully, it was a relatively quick fix which Peter carried out for us.
     
  19. scotjimland

    scotjimland Funster Life Member

    Joined:
    Jul 25, 2007
    Messages:
    28,995
    Likes Received:
    25,691
    Location:
    Suffolk
    the floor is a sandwich bonded construction, inside it's covered plywood.. there's no sponginess.. it's solid and sounds solid when you knock it.. having reinspected I'm fairly confident the rot is confined to that corner, it hasn't travelled up the rear or across the back.. and was probably caused by road spray

    thanks for advice @JeanLuc I'm sure Peter does a great job,.. but I'm going to repair myself..
     
    • Like it Like it x 1
  20. JockandRita

    JockandRita Funster Life Member

    Joined:
    Aug 2, 2007
    Messages:
    6,026
    Likes Received:
    9,494
    Location:
    Lincs/Cambs border
    @scotjimland. Jim, exactly what @JeanLuc posted above.

    We had a similar problem back in 2007/8, and we booked into Peter Hambilton's. According to Peter, ours was due to a Hymer design problem, and affected the S Class and E Class Hymers with the integrated rear bike racks. Peter and his team installed a couple of aluminium mods to redirect water coming off the roof, and also did a smashing repair job timber wise. Being a bit wiser and more informed now, it's a job I would be happy to tackle, but with a bit of help.

    Re your situation re splash from the rear tyres, please PM me (as I have to go out), but I'll reply in the morning.

    Cheers for now,

    Jock. :)
     
    • Thanks Thanks x 1
Loading...

Share This Page