Use and Care Manual

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EVOLVESTONE.COM
3.5 Install Sills (Optional)
Beginning at the corners, make cuts or miter as necessary. To fasten the sill piece:
3.5.1 Using a Simpson A21Z “L” bracket, open the existing bracket holes with a drill to a 1/4"
diameter (2 brackets should be used for each section of sill).
3.5.2 Attach brackets to the sill using 1 1/4" long exterior grade screws. Brackets should be
held 4" from either end of the sill with the leg of the bracket to fit flush against your
mounting surface.
3.5.3 Dry fit the sill with attached brackets to your mounting surface. Pre-drill locations
where Tapcons are to be later installed.
3.5.4 Brush primer on mounting surface and back of sill. Allow primer to tack.
3.5.5 Once primer has tacked, apply thick vertical beads of adhesive to the back of the sill,
allowing a 1/8" drainage/drying gap.
3.5.6 Apply sill to mounting surface and install 1/4" by 2" long Tapcons into pre-drilled
locations.
3.5.7 Verify drainage/drying gap has been maintained.
P ro-Tip: Using a color matched exterior grade polyurethane sealant fill any screw countersink
holes or fill the gaps bridging two abutting sills.
3.6 Install Outside Corners (Optional)
Start at the bottom of your corner assembly and work your way up. Fasten each leg of the
corners with an STPE type adhesive. Treat each leg as its own stone and follow the appropriate
adhesive guidelines as specified in section “3.4.5 Adhesive Guidelines” above.
Pro-Tip: Install your outside corners according to a comfortable lift height for the installer.
Generally, this means 12 to 18 inches at a time and then install your field stones before
beginning the next lift of your corners.
Pro-Tip: Alternate corner leg orientations of your outside corners as best as possible to
avoid creating matching vertical seams.
3.7 Installing the Stones
Start installing stones in lifts at the perimeter of your wall and work your way toward the opposite side,
limiting your cut ends.