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CavClear Masonry Mat. CSI 3-Part Specifications.

These guide specifications have been prepared by CavClear to assist design professionals in the preparation of a specification section covering CavClear Masonry Mat for use in masonry wall cavities and in isolating masonry column cladding from masonry columns: CavClear Masonry Mat prevents mortar obstructions in the air space, eliminates weep obstructions due to mortar droppings and prevents mortar accumulation on masonry wall ties. 

Since they have been prepared according to the principles established in the Manual of Practice published by The Construction Specifications Institute (CSI) including the use of section numbers and titles from the 1988 Edition of MasterFormat, guide specifications may be used in conjunction with most commercially available master specifications sections with minor editing. 

These guide specification is available in both hard copy and a variety of electronic formats to suit most popular word processing programs and operating platforms. Please contact CavClear toll-free at (888) 436-2620 for copies or for information on available electronic formats. 

CavClear� Masonry Mat - Guide Specifications
Section 04150 - Masonry Accessories

PART 1 - GENERAL 

1.1 SUMMARY

    A. Section Includes:

      1. Masonry mat air space maintenance and drainage system for masonry cavities.

      2. Masonry mat air space maintenance and drainage system for isolating masonry column cladding from structural columns.

    B. Related Sections:

      1. Section [03100 - Concrete Formwork] [_____ - ______]: Masonry anchors cast into concrete.

      2. Section [04100 - Mortar and Masonry Grout] [_____ - ______]: Mortar for masonry.

      3. Section [04160 - Masonry Anchorage and Reinforcement] [_____ - ______]: Masonry wall ties, joint reinforcement, and reinforcing bars.

      4. Section [04210 - Clay Unit Masonry] [04220 - Concrete Unit Masonry] [04400 - Stone] [_____ - ______]: Masonry units and wall assemblies.

      5. Section [06115 - Sheathing] [09250 - Gypsum Board] [_____ - ______]: Wall sheathing.

      6. Section [07620 - Sheet Metal Flashing and Trim] [07650 - Flexible Flashing] [_____ - ______]: Wall flashings integral to masonry assemblies.

 1.2 SUBMITTALS

    A. Submit under provisions of Section [01340] [_____]:

      1. Product Data: Include descriptive data, product attributes, and performance characteristics.

      Samples: Submit [two] [____] samples of masonry mat, [6 x 6] [__ x __] inches ([150 x 150] [__ x __] mm) in size. 

1.3 DELIVERY, STORAGE AND HANDLING

    A. Store materials in clean, dry, sheltered area, off ground, until used. 

PART 2 - PRODUCTS 

2.1 MANUFACTURERS

    A. CavClear, P.O. Box 281, Lakeland, MN 55043-0281, (888) 436-2620. 

2.2 MATERIALS

    A. Masonry Mat:

      1. Product: CavClear Masonry Mat.

      2. Description: Fluid conducting, nonabsorbent, mold and mildew resistant polymer mesh consisting of 100 percent recycled polyester with PVC binder.

      *** Specify ¾ inch thickness for 1 to 1_ inch air spaces; specify 1 inch thickness for 1¼ to 1½ inch air spaces; specify 1¼ inch thickness for air spaces 1½ inch or larger. Air space dimensions do not include insulation thickness. Specify required thickness or multiples thereof for column cladding isolation. ***

      3. Thickness: [¾] [1] [1¼] inches ([19] [25] [32] mm).

      4. Size: [8 inches x 8 feet (200 x 2400 mm)] [16 inches x 8 feet (400 x 2400 mm)] 

PART 3 - EXECUTION 

3.1 EXAMINATION

    A. Verify that air space depth is at least 1/4 inch (6 mm) greater than masonry mat thickness.

    B. Verify that weeps, wall ties, and reinforcement are properly located.

    C. Verify that flashings are properly located and intact. 

3.2 PREPARATION

    A. Fill voids in substrate with suitable patching compound; finish flush.

    B. Remove projecting mortar and other protrusions from substrate.

    C. Remove mortar and debris from cavity spaces, wall ties, and reinforcing. 

3.3 INSTALLATION

    A. Install masonry mat continuously in exterior masonry cavities prior to construction of exterior wythe; follow manufacturer�s installation instructions.

    B. Install horizontally between [wall ties] [joint reinforcement]. Stagger end joints in adjacent rows.

    C. Use multiple layers at bottom of wall and above through-wall flashings when air space depth exceeds masonry mat thickness by more than _ inch (9.5 mm). Extend extra mat at least to top of base flashing.

    D. Butt adjacent pieces to moderate contact. Fit to perimeter construction and penetrations without voids. 

END OF SECTION

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