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INTEGRALLY INSULATED CONCRETE MASONRY SYSTEM
[Note: Only basic wording specific to insulated concrete masonry system is provided] |
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PART 1. GENERAL
Section includes: Special concrete masonry units with molded insulating barriers designed to insulate the cores and also between units horizontally and vertically. PART 2. PRODUCTS Provide concrete masonry units produced according to design and specification requirements of West Materials, Inc.. Concrete masonry units shall meet compressive strength and flexural strength requirements of the most recent ASTM C90 [Note to specifier: Specify normal, medium or lightweight; 8, 10 or 12 inch modular size.] Provide EnerBlock molded rigid polystyrene insulating barriers, nominal thickness of [Note to specifier: Specify 4, 2 1/2, 2, or 1 1/4 inch], designed to insulate cores and also between units horizontally and vertically, and with crush ribs designed to assure contact despite slight dimension variations in masonry units and to accommodate ladder or truss type horizontal joint reinforcing according to standard practice. Steady-state wall R-value, including mortar joint and grouted core areas, shall be ________ at _________ pounds per cubic foot concrete oven-dry density as determined by the series-parallel calculation method specified by the U.S. Department of Energy, ASHRAE 90.1, and many state energy codes. |
![]() Slumberland Store, Dilworth, Minnesota Architect: KKE Architects, Inc. |
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To insure compliance, R-values shall be substantiated by submittal of the following certifications:
"NCMA Concrete Masonry R-Value Evaluation" reports for the wall system as published Evaluation reports must indicate compliance with the specified R-value. Thermal mass adjustment can be made by the design firm, if applicable, for the project's climate and design conditions. PART 3. EXECUTION a. Plain Concrete Masonry Walls: Lay masonry units with mortar at exterior and interior face shells only, except full-bed bond block for end, corner, control and other special applications. Insert insulating barriers as each course is laid. Place one barrier in each main core and one into each cavity between blocks. Install horizontal joint reinforcement according to standard practice. Placement of reinforcing in the foundation wall or footing should align with the cores of the above grade wall. b. Reinforced Concrete Masonry Walls: Lay masonry units as above for plain masonry walls, but with special web configurations if necessary. 2 inch or 1 1/4" insulating barriers shall also be inserted in grouted cores, with grout and reinforcing steel at one side of insulating barrier, as shown on drawings. If desirable for 12-inch wide masonry units, 2 1/2 inch or 1 1/4 inch barriers may be placed in the center of the unit with grout and reinforcing on both sides of the barrier. Placement of reinforcing in the foundation wall or footing should align with the cores and reinforcing of the above grade wall. If requested, Independent laboratory test reports shall be submitted Indicating the structural performance of the reinforced concrete masonry wall system as specified. |
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