Installation Guide
 15 
CORNER INSTALLATION 
SANDSTONE FLUSH OUTSIDE CORNER 
Step 1 
Install moisture barrier. Flush mounted corners can allow  
moisture  infiltration  between the panel  and the corner.  A 
moisture  barrier  may  be  required  behind  the  panels  and 
corner  extending  a  minimum  of  4"  from  either  side  of  the 
corner.  A  self-adhering  flashing  membrane  such  as  Grace 
Vycor® is recommended. 
Step 2 
Flush mounted outside corners are 4' tall. The placement of 
the corners will depend on how the top of the corner is 
terminated. For applications over 48" in height, the corner 
pieces can be stacked with the final corner cut to the 
required height. 
For wainscot applications, the corner 
can be capped with a ledger attached to the tongue of the 
top panel and cut with a compound miter at a 45° angle, or 
a Ledger Outside Corner can be used. 
The top of the corner should be placed 2" below the top of the 
tongue on the top panel. 
Step 3 
The corner has screw guides or dimples to help position the 
screws using the correct angle.  There are also screw guides 
along the sides.  All screws are installed at an angle and at a 
location  where  they  will  be  concealed.    Install  two  screws 
through the top and at least 4 on each side. Good quality  
exterior screws, #6 or #8 x 2 ½" are recommended. 
Step 4 
Install  the  remaining  accessories  and  finish  the  panels.  The 
joints  between  the  panels  and  the  corner  must  be  caulked 
using  a  good  quality  caulk  or  textured  grout  to  make  a 
water-tight installation.  
Note: Sandstone Accessories 
are universal and can be used 
with all panel profiles 










