Specifications

WATERFORD STONE By Northfield
Masonry Unit Specifications

Part 1- General

1.01 Submittal

A. Submit product literature, unit shop drawings, certification, test reports, full size sample(s) of each color selected.

1.02 QUALITY ASSURANCE

A. All high density concrete masonry units shall be WATERFORD STONE masonry units manufactured by Northfield.All units shall conform to ASTM C90-96 and shall have a hand chiseled finish with a range of colors as specified.

B. Field Constructed Mock-up: Construct a sample panel, no less than 4′ x 4′, of units of the color to be used in the project. The cleaning agent and method should also be determined and applied at the time the sample panel is constructed.

1.03 DELIVERY, STORAGE, AND HANDLING

A. Concrete Stone Masonry Veneer: WATERFORD STONE Masonry Units as manufactured and distributed by Northfield.

B. Solid units with physical dimensions and characteristics complying with ASTM C55 and the physical properties of ASTM C568, Class II.

C. Color: Minimum of three variegated color blending as selected from manufacturers standard selections.

D. Size: 4 inches in width nominal with face dimensions selected from a minimum of 15 face sizes to match ashlar pattern indicated on drawings or established in the approved mock-up.

E. Anchors: Provide anchors to suit design requirements for material and installation requirements.

F. Mortar Materials: Provide mortar to suit design requirements for material and installation requirements.

1.04 PROJECT/SITE CONDITIONS AND HANDLING

A. Cover walls each day after installation to keep open walls protected and dry.

Part 2 – Products

2.01 Product Name

A. WATERFORD STONE Masonry Units.

2.02 MANUFACTURER

Northfield
One Hunt Court
Mundelein, Illinois, 60060
847-816-9000 (PH)
847-816-9072 (FAX)

Part 3- Execution

3.01 LAYING MASONRY WALLS

Coursings: Install masonry construction anchored solidly to backing, properly
aligned, plumb, and true in required layout, making straight, level courses, unless
otherwise indicated.

1. Place varying size of stones to provide a random Ashlar pattern as approved.
2. Maintain mortar joint thickness of 3/8 inch (10 mm) to 3/4 inch (19 mm) either horizontally or vertically.
3. Tool joints as follows:

** NOTE TO SPECIFIER ** Select joint type required. Delete types not required. Note that tooled joints are more water resistant
than recessed joints.

1. Flush.
2. Concave.
3. Recessed.

** NOTE TO SPECIFIER ** Coordinate control joint locations with design requirements and the Drawings.

1. Placing and Bonding: Lay masonry in full bed of mortar with full head joints, properly jointed with other work. Buttering corners of joints, deep or excessive furrowing of mortar joints is not permitted.
2. Back-bevel bed joints to remove excess mortar droppings in cavity as work progresses.
3. Fully bond intersections and external corners.
4. Isolate masonry partitions from vertical structural framing members with a control joint as indicated.
5. Provide for expansion and control joints as indicated on the Drawings.
6. Do not adjust masonry units after placing. Where resetting of masonry is required, remove, clean units and reset in new mortar.
7. Leave joints under shelf angles and elsewhere as indicated or required open to receive sealant.

** NOTE TO SPECIFIER ** Coordinate with project design requirements and the Drawings. Delete backing wall constructions not required.

1. Anchors: Provide anchors to suit design requirements indicated or required.
2. Masonry backing: Wire anchors or adjustable anchors. Minimum spacing 18 inches (450 mm) horizontally and 32 inches (800 mm) vertically.
3. Steel stud backing: Adjustable anchors attached with corrosion-resistant screws having a minimum nominal shank diameter of 0.19 inch (4.8 mm). Minimum spacing 18 inches (450 mm) horizontally and 32 inches (800 mm) vertically.
4. Wood stud backing: Corrugated sheet metal anchors, wire anchors or adjustable anchors. Attach to backing with a corrosion-resistant 8d common nail, or a fastener with equivalent or greater pullout strength. Minimum spacing 18 inches (450 mm) horizontally and 32 inches (800 mm) vertically.
5. Increase quantity of wall ties around perimeter of openings, at wall terminations and corners, and along parapet walls, placed within 8 inches (203 mm) of openings and edges of masonry.

Build-in items furnished by other trades, and leave accurate openings necessary for subsequent installation of other Work to maintain required strength and appearance of masonry construction.

1. Fill solidly with mortar around conduit and sleeves passing through masonry Work.
2. Build-in loose steel angle lintels, providing bearing indicated in full mortar bed.

Prevent grout, mortar, and soil from staining face of masonry. Remove grout and mortar from these surfaces immediately.

1. Protect base of masonry walls from rain splashed mud and mortar splatters.

Install weep holes in veneer masonry at maximum 24 inches (610 mm) on center horizontally above through-wall flashing, above shelf angles, lintels, bottom of walls, and elsewhere as indicated on Drawings.

1. Do not permit mortar to drop or accumulate into cavity air space or to plug weeps.

3.02 INSTALLATION

A. Lighting: Provide adequate lighting for masonry work by placing all lighting a reasonable distance from the wall for even
illumination. Do not use trough lighting.

B. Cutting: Make all unit cuts, including those for bonding, holes, boxes, etc., with motor-driven masonry saws, using either in abrasive or diamond blade. Cut neatly for best appearance.

3.03 INSPECTION

A. The facing 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 fifteen (15) feet at right angles to the wall with normal lighting.

3.04 FLASHING OF MASONRY WORK

A. Install flashing at locations shown in the plans and in strict accordance with the details and the best masonry flashing practices.

3.05 WEEP HOLES AND VENTS

A. Install weep holes and vents at proper intervals (32″ O.C.) at courses above grade, above flashing, and at any water stops (32" O.C.) over windows, doors, and beams.

3.06 CLEANING

A. Keep walls clean daily during installation using brushes, rags, and burlap squares. Do not allow excess mortar lumps or smears to harden on the finished surfaces. Remove green mortar with burlap or a dry cloth. Harsh cleaning methods after walls have been erected may mar the surface of the units.

3.07 FINAL CLEANDOWN

A. No ACID or ACID base solutions shall be used in the cleaning of WATERFORD STONE units. A detergent masonry cleaner shall be used following the manufacturer’s instructions and the surface shall be thoroughly rinsed with clean water.

3.08 MAINTENANCE

A. WATERFORD STONE units, properly installed and cleaned, need virtually no maintenance other than routine cleaning with standard commercial grade cleaning agents. Graffiti, paint or dye stains may need special cleaning methods and products. Contact manufacturer for specific cleaning recommendations.

3.09 INSTALLATION RECOMMENDATIONS

A. Cavity wall construction is recommended for exterior walls, with proper flashing, venting and weep holes.

1. A complimentary or matching mortar color is recommended when using WATERFORD STONE units.

1. C. A water repellent mortar additive is highly recommended for all exterior walls.

1. D. Control joint spacing should be approximately 20' – 25' max. and located at inside corners, 2-4' from outside corners, wall height changes and at one or both sides of windows or large openings.

3.10 LIMITATIONS

A. The facing is not intended for use as an impervious surface.

B. Muratic acid should not be used as a cleaning agent or in direct contact with the facing.
C. The facing should not be continuously exposed to temperatures above 250° F.