Patching Chips And Small Holes In Granite
- Procedure code:
- Hsr - Departmental Auditorium Bldg/Wash, Dc - Grier, Brown..
- Last Modified:
PATCHING CHIPS AND SMALL HOLES IN GRANITE
A. This procedure includes guidance on patching small chips
and holes in granite. This may include patching small
holes in granite left behind with the removal metal bolts
and fasteners from the stone.
B. See 01100-07-S for general project guidelines to be
reviewed along with this procedure. These guidelines
cover the following sections:
1. Safety Precautions
2. Historic Structures Precautions
4. Quality Assurance
5. Delivery, Storage and Handling
6. Project/Site Conditions
7. Sequencing and Scheduling
8. General Protection (Surface and Surrounding)
These guidelines should be reviewed prior to performing
this procedure and should be followed, when applicable,
along with recommendations from the Regional Historic
Preservation Officer (RHPO).
A. American Society for Testing and Materials (ASTM),
A. Two part polyester resin adhesive colored to match
existing granite such as "Akemi Transparent" knife grade
(Akemi), or approved equal; 15-30 minute cure at 70
degrees F.; can be applied at temperatures as low as 40
B. Permanent coloring agent as required, compatible with
adhesive, and as recommended by adhesive manufacturer.
C. Clean, potable water
A. Stiff bristle brushes (natural fiber or nylon bristle)
B. Polyethylene plastic mixing vessel for mixing adhesives
and patching mortar
C. Razor blade(s)
3.01 ERECTION, INSTALLATION, APPLICATION
A. Remove loose dirt and debris from the hole and the
surrounding stone surface using a stiff bristle brush.
Flush with clean, potable water if necessary and allow to
B. Mix patching material following manufacturer's
instructions and recommendations. Mix coloring agent
with mastic before adding hardener. Mixes should be
tested to determine finish color after curing, to achieve
best color match with surrounding stone.
C. Apply patching material to stone following manufacturer's
D. When the patching material becomes rubbery, carefully
remove excess material using a razor blade. Finish patch
surface to match surrounding stone surfaces.
E. Any patches determined unacceptable will be removed and
refilled as directed by the Regional Historic
Preservation Officer. Unacceptable patches include those
showing separation at the edges and/or hairline cracking.
END OF SECTION