Hi Slowsod
The back wall of the Wyoming was just wall board . This is what I did.
Bailey Senator Wyoming Series 6 new November 2007
Only after purchase on our first trip did we discover the shower cubicle was not fully plasticised. The rear end and small side by the door were the basic standard Bailey wallboard material. When the shower door is open you can't see these two walls and hence we missed them.
Bailey assured us nothing had been missed out. We were surprised when you consider the Wyoming is a Bailey Flagship and our previous Bailey Pageant Series 5 Vendee had a fully lined shower.
I decided to line the bare boards with plastic sheet . I exchanged e-mails with Kelly Watts at Bailey who agreed I could go ahead and line the rest of the shower cubicle , in consultation with Chipping Sodbury Caravans. She confirmed my Warranty would not be affected. I discussed the matter with Chipping Sodbury 's Tony Voisey who agreed I could do the job myself as it was pretty straight forward. Sourcing the materials was going to be the problem for him. So off I went in my search for plastic.
The original shower plastic sheet supplier to Baileys are Thompson Plastics Group.Their Nick Robinson was most helpful but unfortunately they do not sell direct to the public. ( Not in 2008 they didn't)
He told me their OME was 2mm High Impact Polystyrene Colour - Euro White. He suggested I contact Amari plastics Group who may be able to help.
I contacted Karen Bedford at Amari Plastics Bristol. She was very helpful and whilst she could not supply the 2mm High Impact Polystyrene she came up with :-
Trovidur ESA-D white TR1612 .Sheet size is 2440mm x 1220mm x 2mm £23.00 per sheet excluding VAT.
I triple checked the measurements and placed an order. Amari Plastics offer a free cutting service as well. They have branches throughout the UK.
Measuring is important. The main back panel was measured at 3 points across the width ie top middle and bottom. Similarly the height was also measured at 3 points. I ensured a snug fit but not an interference fit. The smaller panel by the door was also carefully measured allowing a reduction of 2mm width to allow for the back panel thickness. Any small gaps would be filled with the top grade sanitary silicone sealant. Don't skimp on the sealant. Top quality will do the job and last a long time. I ensured all edges were adequately silicone sealed.
Fixing was straight forward .Baileys wallboard is 28mm thick so using 3/4 inch or 20mm No 6 stainless steel screws is fine. Try and line up the new screws on the same plane as the original screws. Drill pilot holes through the plastic sheet only. Use the white screw caps readily available from B&Q or Screwfix. Smear the screws in silicone sealant immediately before use to ensure a water tight seal. The final piece of plastic trim at the top was sourced from a little back street shop in Bristol. A3 metre strip cost me £1.00
Overall the whole project cost me just under £40.00 and has transformed the entire shower cubicle and of course made it even more water tight .
Five years on I expect the cost will have increased a bit but believe me this was one of teh best useful mods I have done.