Installing the SURFACE APPLIED
alerttile® Product Contents
- alerttile® detectable warning panel (qty. 1)
- Hilti HUD-1 anchors and stainless steel screws
- One-part BASF NP-1 Sealant / Adhesive (qty. 1)
Tools and Equipment Needed
- One alerttile® detectable warning panel
- Hammer drill with ¼” x 3″ concrete bit
- alerttile® adhesive / sealant (BASF NP-1)
- alerttile® sleeve anchors
- Caulking gun and sealant edging tool
- Masking tape or duct tape
- Concrete Grinder
- Acetone cleaner
Confirm with Contractor or Engineer that surfaces being prepared to receive the alerttile® are constructed properly and are adequate for the alerttile® installation. Confirm all design drawings detailing the layout and location for installation as required by the ADA or local governing authority.
The surface area that’s to receive the installation of the alerttile® should be cleaned and dried thoroughly prior to installation. It’s recommended to use a diamond cup grinder or pressure shot-blaster to remove any dirt or foreign matter from the surface area and (at a minimum) to use a wire brush to remove any dirt or other matter.
Final inspection of the surface area to receive the alerttile® shall be made to ensure it’s structurally sound and clean, dry and free of any voids, projections, loose matter or material, oil, grease, sealers and curing compounds. Any application over newly poured concrete shall be following a minimum cure period of 30 days. Note: the above preparations shall still be followed for newly poured concrete.
Installation temperatures are recommended between 40°F- 100°F, but shall be a minimum of 40° F. The adhesive shall be a minimum of 65°F prior to use.
Once the surface area location is determined and prepared, place alerttile® on surface according to the design layout or drawings (generally 6″ – 8″ from the bottom of the curb ramp). When the tile is properly aligned, apply masking tape on the adjoining surface area around the perimeter of the AlertTile™, leaving nominally a ¼” gap between the outer edges of the AlertTile™ and the tape. Also apply tape to the perimeter of the AlertTile™ on the tapered edge, leaving nominally 1/8″ of the outside edge of the alerttile®exposed without tape. See Fig. 1
Remove the alerttile® from the layout area and apply the supplied NP-1 adhesive/sealant to the back of the panel. We recommend you apply a generous continuous bead around the perimeter of the tile approximately ¾” from the edge. Also cross two beads of adhesive through the center of the tile from each outside edge. See Fig. 2
Set the alerttile® true within the tape layout created in Step 4, maintaining the ¼” space between the tape and the tile. Apply even, downward pressure to the alerttile® starting at the center and moving toward the outer edges of the panel until the panel is secure to the substrate.
Using a ¼” carbide drill bit, drill straight and true holes approximately 2″ deep in each of the countersunk screw holes that are pre-drilled in the tile. For best results, drill the hole perpendicular to the concrete and make sure to drill it deep enough so that the screw doesn’t have to be backed out. Be sure all drilling debris is blown or cleaned from the holes and generally clean entire area. See Fig. 3
Insert the mechanical fasteners into the drilled holes, making sure the fasteners are all the way down into the countersunk area of the alerttile® and into the concrete substrate. Using a Phillips #2 screwdriver, apply downward force to the fastener and manually tighten each one (causing the anchor to expand into the substrate and “lock” the tile into place). See Fig. 4
During installation, some adhesive may be pushed out from under the tile around the perimeter edge, which is ok. Using additional adhesive if necessary, fill the ¼” area between the tile and the tape layout along the perimeter edges ensuring that the sealant flows sufficiently underneath the tile edges. Blend and taper the adhesive smooth around the perimeter of alerttile® with a cove-type profile tool (it’s recommended to blend the adhesive up onto the 1/8″ exposed area where you’ve applied tape to the AlertTile™). See Fig. 5
When the adhesive is smoothed and tapered along the full perimeter of the alerttile®, carefully remove the tape from the alerttile® and adjoining surface area (for best results, pull the tape away at a perpendicular angle). This should leave a clean and even sealed edge along the perimeter of the alerttile®, prohibiting water from penetrating underneath the product. See Fig. 6
Cure Time. Depending on the temperature and humidity, the adhesive should have an initial skin cure time of 2 to 3 hours. It’s recommended that you prohibit pedestrian traffic on the newly- installed AlertTile™ product during this initial cure time. Full cure of the adhesive may take 5 – 8 days.
Use Acetone and a wire brush for general clean up of the adhesive/sealants. Concrete dust and debris can be swept away with a broom although take care not to sweep over newly placed sealant to avoid tracking. The use of a blower is recommended. Notice: Use only adhesive, sealer and anchors provided with alerttile®. For MSDS information, product specifications or warranty information, please contact your sales representative or call us at 866-999-7452. Much care has been taken in the development of alerttile®. Please pay close attention to these instructions. When properly installed, the product will give you years of dependable service.