GROUND FACE CONCRETE MASONRY UNITS
PART 1 - GENERAL
Submit color samples for selection from manufacturer's standard selection kit. Submit product
literature, certifications, test reports and full size samples of each color specified.
Certifications: Concrete blocks for grinding shall conform to ASTM C90, Type 1. The provisions of
ASTM C90 Paragraph 7.3.1 apply with regard to imperfections.
The ground surfaces shall have a factory-applied, heat-treated water repellant coating. Units shall
conform to the requirements of ASTM C744 with respect to Adhesion, Abrasion, Color Change
and Resistance to Crazing, and ASTM C67 with respect to freezing and thawing.
Field Constructed Mock-ups: Construct a sample panel, approximately 4'x 4' per instruction from
architect, of each color and size to be used in the project.
DELIVERY, STORAGE, AND HANDLING
PREMIER LINE™ ground face units shall be delivered to the job-site on heavy-duty wooden
pallets, foam between layers of block and shrink or stretch-wrapped covering over the entire
package. Store pallets (one pallet high) on level ground and cover with waterproof tarpaulins to
protect pallets of block from the weather. Handle the units with extra care to prevent chips and
breakage to the finished faces.
PART 2 - PRODUCTS
Ground Face Units are to be PREMIER LINE™ units by:
E. Dillon & Company
P.O. Box 160
Swords Creek, VA 24649
Toll-Free: (800) 234-8970
Fax: (276) 873-5688
Web site: http://www.edillon.com
SIZES & SHAPES
Bed Depth dimensions for single face units are 3-9/16", 5-9/16", 7-9/16", +/- 1/16". Two face units
are 3-1/2", 5-1/2", 7-1/2", +/- 1/16".
All ground face units shall be manufactured using an integral liquid polymeric water-repellent
admixture. This admixture shall be introduced into the concrete mix in doses proven to render the
units permanently water repellent.
On all exterior walls the use of a matching integral liquid polymeric water-repellent admixture for
the mortar shall be used.
When both admixtures are used properly, non-dispersible films formed in the units and within the
mortar provide controlled absorption to render the masonry: 1) permanently water-repellent 2)
assure adequate and more consistent bond strength 3) minimize both primary and secondary
PART 3 -EXECUTION
LAYING MASONRY WALLS
Lay units with care to use the best masonry practices. Install only quality units; reject any
defective units...call manufacturer at once if units are suspected to be defective. Align units level,
plumb and true with uniform carefully tooled 3/8" mortar joints.
Lighting: Install masonry with lighting adequate to simulate the lighting that will exist after the
project is completed.
Cutting: Cut units carefully and neatly where required for bonding, junction boxes, jambs, etc.
The ground faces of the units shall be free from chips, cracks, crazes or any other imperfection
that would detract from the overall appearance of the finished wall when viewed from a distance
of twenty (20) feet at right angles to the wall with normal lighting.
FLASHING OF MASONRY
Install flashing as indicated by construction drawings and details and in accordance with the best
WEEP HOLES AND VENTS
Install weep holes and vents at proper intervals (in head joints 32" O.C. and 2" long typical) at
courses above grade, above flashing, and over doors, windows and beams.
Tuckpoint the false joints (scores) of PREMIER LINE™ scored ground face concrete masonry
units to make the scores more closely match the head joints.
CLEANING (IN PROGRESS AND FINAL)
Keep walls clean during work in progress using brushes, rags, etc. Clean ground face surfaces as
possible while laying units, while moving scaffolding and when tooling of joints is done. Do not
allow excess mortar lumps or smears to harden on the face. Contact the manufacturer (E. Dillon
& Company) for final clean-down instruction which includes the use of a light-duty concrete
cleaner and special precautions.
PREMIER LINE™ Ground Face Units when properly installed and cleaned need very little or no
maintenance besides cleaning, when required, with standard commercial or household cleaning
agents (eg. Pinesol, Spic & Span).