Basic HTML Version
-11-
For more information please visit:
CASTinTACT®
Concrete Tactile
Warning Panels
Thin Set Install
©
COPYRIGHT MASONS SUPPLY COMPANY 2010
CAST inTACT .com
JAN 2010
3.3 THIN SET INSTALLATION PROCEDURES
A.
Install Detectable Warning Panels in accordance with TCA
Handbook for Tile Installation and ANSI A108.5 Specifications.
B.
All expansion and control joints must be carried through all layers
of installation materials including warning panels, setting bed,
mortar bed, concrete substrate and steel reinforcing. Joints should
be spaced typically 8’ to 12’ in both directions. All perimeter edges
of ramps or blended transitions should have expansion joints. (Refer
to TCA Handbook current issue of EJ-171 for details on placement,
size and specifications of materials)
C.
Install Detectable Warning Panels with a polymer modified
medium bed thin set material complying with ANSI A118.4 in
accordance with manufacturer’s installation instructions utilizing a
½”x½”x½” square notched trowel.
D.
Using flat side of trowel, apply a skim coat of mortar. Apply
additional mortar with notched side of trowel held at 45º angle to
the surfaces, combing in one direction. Do not spread more thin set
than can be set within working life. If material is past working life,
remove and replace with fresh material.
E.
Pre-dampen back of tactile panels saturated surface dry (SSD)
with clean water and parge back of panel with medium bed thin-
set simultaneously while the mortar is being applied to the substrate.
Adjust panels promptly and lightly tap panels to proper grade with
rubber mallet to insure 100% surface contact with substrate.
Wedge
or flared edge of panel facing the curb.
F.
Base of truncated dome shall be flush with adjacent surfaces to
permit proper drainage and eliminate tripping hazard between
surfaces. Tolerances between tactile panels and surrounding
surfaces is 1/16” maximum. Immediately after placement re-check
slope and elevation for proper grade.
G.
Traffic should be kept off the detectable warning panels
according to thin set manufacturer’s recommendations.
H.
Provide joint widths indicated in drawings.
I.
Panel Joints should be allowed to cure for minimum 24 hours
before grouting or light traffic, depending upon temperature and
humidity. Blow out all dust and debris in open panel joints.
J.
Before grouting mist all sides of panel joints with cool clean water.
Keep panel joints in a saturated dry condition (SSD) before grouting.
Remove ponding water from bottom of joint opening before
grouting. Maximum surface temperature for open panel joints to be
grouted is 90
o
F.
K.
Mix colored grout at a 1:2 ratio of gray or white portland cement
(depending on panel color) and 30 mesh white sand with 1:1 ratio
of acrylic admix and potable water; add integral color pigment to
match CASTinTACT® panels.
L.
Apply colored grout into (SSD) panel joints, forcing grout filling
entire panel joint. (A mortar squeeze bag works well for dispensing
the mortar and tuck pointing tool works well for compacting mortar
in the joint opening.)
M.
Immediately clean excess mortar smears off panels and adjacent
surfaces with a damp sponge to ensure a clean appearance.
Change rinse water often to keep surfaces clean. Usually 2 or more
clean sponge rinses are required.
N.
After initial set of colored grout, finish joints with brick jointer to
produce a slightly concave polished joint, free from cracks.
O.
Proper curing of grout entails periodically misting the installation
with clean, cool water for a period of 72 hours. Alternatively apply
a cure coat to grout joints with a 1:1 ratio of acrylic admix mixed
with potable water. Use a paint brush to apply a thin mil cure coat
keeping off face of warning panels. Do not over apply cure coat; it
will not dry clear.
P.
Expansion Joint sealing should be performed a minimum 7
days after grouting of panel joints. Compatible expansion joint
sealant must conform to ASTM C920, color to match panels. Tool
joints to produce a slightly concave polished joint. Follow sealant
manufacturer's recommendation for joint preparation and
installation procedures.
3.4 CLEANING
A.
Remove all unused material, tools, and equipment. Dispose of
properly.
B.
If the detectable / tactile surface requires, clean the panels in
accordance with
CASTinTACT® Cleaning and Maintenance Guide
.
3.5 PROTECTION
Protect the
CASTinTACT® 3
Warning Panel surface from traffic until
desired strength is achieved. If necessary, protect panels with
plywood and an underlayment layer of non-staining, non-woven
curing blanket until acceptance of work. Secure plywood if
needed.
3.6 STORAGE
Store products under cover in manufacturer’s unopened
packaging until ready for installation. Store pallets on supported
flat surface. DO NOT DOUBLE STACK PALLETS.
Download the full specifications online at
www.CASTinTACT.com