Replies

1. 
   Shoeman | Nov 30, 2004 05:55am | #1

   exterior grade plywood - covered with FRP (fiberglass reinforced panels)?

2. 
   butch | Nov 30, 2004 02:41pm | #2

   They make 4x8 sheets of concrete board (might be even taller sheets, but I didn't

   need them so I didn't ck., and with    garage walls you can

   probably use taller sheets or put a joint above 8' )  Put up 30lb felt on your studs,

   apply c.b. using screws made for c.b., (don't use nails ), use fiberglass

   on the joints and skim coat entire surface, after doing your joints (I did a wash bay in

   our warehouse and don't remeber what I used for top coat, but it is flexible and

   water proof). Silicone the bottom joint prior to putting up sheet and another

   application after all is said and done. The wash bay I built has been up approx.

   12yrs. and backs up to our office and so far no leaks.  We use a power washer for

   cleaning equipment and can use it on the walls with no problems.

      I would be concerned about overspray on the ceiling.

   (Are wash bay is open on the ceiling). I would consider moisture

   resistant sheetrock with strapping on 12" centers ,not 16" centers(with a smooth

   finish). I believe m.r.s. is not recommended for ceilings but I've used it with 12"o.c.

   strapping with no problem. Someone correct me if I'm wrong.

    

   After re-reading your post I would also be concerned with any outlets that are  on

   the walls, as I can gurantee you'll be getting them wet.  Maybe you could use 

   exterior outlet covers to keep the water out.

   I came back to edit this after thinking about it some more, just want to add

   that another alternative would  be to use the 4x8 concrete siding(t-1-11) w/ a

   reverse batten(horizontal concrete siding installed vertically) on the joints.

   This would probably be a cheaper alternative than the c.b. because those

   4x8 sheets (c.b.)aren't cheap.  And with a skim coat(did it for appearance) it

   would be pretty labor intensive.

    

   
   

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   Edited 11/30/2004 6:57 am ET by butch