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| | SECTION 04090 |
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| | MASONRY ACCESSORIES |
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| | ** NOTE TO SPECIFIER ** Mortar Net USA, Ltd; masonry wall drainage systems.
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This section is based on the products of Mortar Net USA, Ltd., which is located at:
326 Melton Rd.
Burns Harbor, IN 46304
Te1: (800) 664-6638
Phone (219) 787-5080
Fax: (219) 787-5088
Email: info@mortarnet.com
www.mortarnet.com
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Mortar Net provides the leading solution for clogged weep holes in brick cavity construction. Featuring a patented-shaped design and 90 percent open-weave mesh, Mortar Net catches and suspends mortar droppings and other debris above the weep holes. Mortar Net prevents the mortar from forming a barrier against necessary water flow, allowing for the free migration of moisture from the wall to the weep holes.
The efficient management of moisture that Mortar Net provides eliminates efflorescence on interior and exterior masonry walls, prevents damage caused by freeze-thaw cycles, and is the first step in preventative measures that allow mold to develop, ensuring optimum performance of the walls. Mortar Net Weep Vents are used in conjunction with Mortar Net to prevent insects and debris from clogging weep holes as well as ensuring that masonry walls maintain their finished appearance.
Other products provided by the manufacturers of Mortar Net that manage water infiltration in masonry construction include Weep Vents and residential HouseNet, as well as Blok-Flash and BlockNet, which are designed for single wythe block construction.
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| | PART 1 | GENERAL |
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| | 1.1 | SECTION INCLUDES |
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| | | A. | Masonry cavity wall drainage systems. |
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| | | B. | Masonry wall weep vents. |
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| | 1.2 | RELATED SECTIONS |
| | ** NOTE TO SPECIFIER ** Delete sections below not relevant to this project; add others as required. |
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| | | A. | Section 04050 - Basic Masonry Materials and Methods: Additional masonry materials. |
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| | | B. | Section 04200 - Masonry Units: Masonry installation and coordination requirements. |
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| | | C. | Section 04400 - Stone: Stone installation and coordination requirements. |
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| | | D. | Section 04800 - Masonry Assemblies: Additional masonry assembly requirements. |
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| | | E. | Section 07190 - Water Repellents: Masonry wall coatings. |
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| | | F. | Section 07200 - Thermal Protection: Building Insulation. |
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| | | G. | Section 07600 - Flashing and Sheet Metal: Metal counter flashing installation and coordination requirements. |
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| | 1.3 | SUBMITTALS |
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| | | A. | Submit under provisions of Section 01300. |
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| | | B. | [ Product Data ]: Manufacturer's data sheets on each product to be used, including: |
| | | | 1. | Preparation instructions and recommendations. |
| | | | 2. | Storage and handling requirements and recommendations. |
| | ** NOTE TO SPECIFIER ** Delete following paragraph if Weep Vent colors are specified in Part 2. |
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| | | C. | Selection Samples: For Mortar Net Weep Vents specified, two complete sets of product representing manufacturer's full range of available colors and patterns. |
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| | | D. | Verification Samples: For each Mortar Net Weep Vents specified, two samples, minimum size 6 inches (150 mm) square, representing actual product, color, and configuration. |
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| | 1.4 | QUALITY ASSURANCE |
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| | | A. | Installer Qualifications: Minimum 2 years experience with similar masonry installations. |
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| | 1.5 | DELIVERY, STORAGE, AND HANDLING |
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| | | A. | Store products in manufacturer's unopened packaging until ready for installation. |
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| | | B. | Protect products from exposure to direct sunlight. |
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| | PART 2 | PRODUCTS |
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| | 2.1 | MANUFACTURERS |
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| | | A. | Acceptable Manufacturer: Mortar Net USA Limited, which is located at: 326 Melton Rd. ; Burns Harbor, IN 46304; Toll Free Tel: 800-664-6638; Phone: 219-787-5080; Fax: 219-787-5088; Email: info@mortarnet.com; Web: www.mortarnet.com |
| | ** NOTE TO SPECIFIER ** Delete one of the two following paragraphs; coordinate with requirements of Division 1 section on product options and substitutions. |
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| | | B. | Substitutions: Not permitted. |
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| | | C. | Requests for substitutions will be considered in accordance with provisions of Section 01600. |
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| | 2.2 | MATERIALS |
| | ** NOTE TO SPECIFIER ** Delete one of the two following paragraphs. Mortar Net recommended by manufacturer for commercial construction; House Net recommended for residential construction. |
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| | | A. | Brick Cavity Wall Drainage System: Mortar Net as manufactured by Mortar Net USA, Ltd., 90 percent open weave mesh, dovetail configuration with continuous bottom strip. |
| | ** NOTE TO SPECIFIER ** Delete two of three following paragraphs. Manufacturer recommends that cavity should be no more than 1/4 inch wider than 1 inch and 2 inch material and 0.4 inch material should touch both the outer wythe and the inner wall of masonry cavity. Material is compressible to allow for variation in wall cavity widths. |
| | | | 1. | Material and Thickness: Nylon; 0.4 inches (10 mm). |
| | | | 2. | Material and Thickness: High-density polyethylene (HDPE); 1 inch (25 mm). |
| | | | 3. | Material and Thickness: Recycled polyester; 2 inches (51 mm) thick. |
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| | | B. | Brick Cavity Wall Drainage System: House Net as manufactured by Mortar Net USA, Ltd ., recycled polyester; 90 percent open weave mesh, dovetail configuration with continuous bottom strip. |
| | ** NOTE TO SPECIFIER ** Delete two of three following paragraphs. Manufacturer recommends that cavity should be no more than 1/4 inch wider than 1 inch and 2 inch material and 0.4 inch material should touch both the outer wythe and the inner wall of masonry cavity. Material is compressible to allow for variation in wall cavity widths. |
| | | | 1. | Thickness: 0.4 inches (10 mm). |
| | | | 2. | Thickness: 1 inch (25 mm). |
| | | | 3. | Thickness: 2 inches (51 mm). |
| | ** NOTE TO SPECIFIER ** Delete if Weep Vent not required. |
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| | | C. | Brick Cavity Wall Weep Vents: Mortar Net Weep Vents as manufactured by Mortar Net, USA Ltd. UV-resistant recycled polyester; 90 percent open weave mesh, rectangular shape. |
| | ** NOTE TO SPECIFIER ** Delete colors that are not required. |
| | | | 1. | Color: Match mortar color with selection from manufacturer's standard colors. |
| | | | 2. | Color: White. |
| | | | 3. | Color: Brown. |
| | | | 4. | Color: Tan. |
| | | | 5. | Color: Gray. |
| | | | 6. | Color: Red. |
| | | | 7. | Color: Almond. |
| | ** NOTE TO SPECIFIER ** Delete one of the two following paragraphs. Blok-Flash recommended by manufacturer for drainage for full depth of block; BlockNet for drainage of exterior face and cell of block. |
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| | | D. | Concrete Masonry Unit Cavity Wall Drainage System: Blok-Flash as manufactured by Mortar Net USA, Ltd., high-density polyethylene, molded flashing pan with integral weep spout. |
| | ** NOTE TO SPECIFIER ** Delete two of three following paragraphs. US-8 is for 8-inch-wide CMU; US-10 is for 10-inch-wide CMU; and US-12 is for 12-inch-wide CMU. |
| | | | 1. | Width: Model US-8; 5-5/8 inches (143 mm). |
| | | | 2. | Width: Model US-10; 7-5/8 inches (194 mm). |
| | | | 3. | Width: Model US-12; 9-5/8 inches (245 mm). |
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| | | E. | Concrete Masonry Unit Cavity Wall Drainage System: BlockNet as manufactured by Mortar Net USA, Ltd. Stainless steel drainage strip with integrated drip edge, horizontal mesh, rear water dam, and 90 percent open weave polyester vertical mesh. |
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| | PART 3 | EXECUTION |
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| | 3.1 | EXAMINATION |
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| | | A. | Do not begin installation until substrates have been properly prepared. |
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| | | B. | If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding. |
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| | 3.2 | INSTALLATION |
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| | | A. | Install in accordance with manufacturer's instructions. |
| | ** NOTE TO SPECIFIER ** Delete installation methods below that are not required. |
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| | | B. | Brick Cavity Wall Drainage System: Mortar Net as manufactured by Mortar Net USA, Ltd. Install in strict accordance with manufacturer's instructions and as follows: |
| | | | 1. | Verify installation of flashing and completion of first two courses of masonry. |
| | | | 2. | Extend flashing from the bottom of the Mortar Net to at least 6 inches (152 mm) above the top of the House Net to prevent mortar bridging between the outer wythe and inner wall. |
| | | | 3. | Remove mortar droppings and debris from flashing and weep holes. |
| | | | 4. | Install in cavity directly on flashing, with dovetail profile facing upward. Butt ends together. Compress slightly if necessary. |
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| | | C. | Brick Cavity Wall Drainage System: House Net as manufactured by Mortar Net USA, Ltd. Install in strict accordance with manufacturer's instructions and as follows: |
| | | | 1. | Verify installation of flashing and completion of first two courses of masonry. |
| | | | 2. | Extend flashing from the bottom of the House Net to at least 6 inches (152 mm) above the top of the Mortar Net to prevent mortar bridging between the outer wythe and inner wall. |
| | | | 3. | Remove mortar droppings and debris from flashing and weep holes. |
| | | | 4. | Install in cavity directly on flashing, with dovetail profile facing upward. Butt ends together. Compress slightly if necessary. |
| | ** NOTE TO SPECIFIER ** Delete if weep vents not required. |
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| | | D. | Weep Vents: Mortar Net Weep Vents as manufactured by Mortar Net USA, Ltd.: Install in strict accordance with manufacturer's instructions and as follows: |
| | | | 1. | Clean flashing and weep holes free of mortar droppings and debris. |
| | | | 2. | Align exterior face of insert with exterior plane of mortar. |
| | | | 3. | For head joints taller than height of mesh insert, coordinate installation of mortar above insert to prevent clogging. |
| | | | 4. | Fill head joint with 1/8 inch (3 mm) recess from face of masonry. |
| | ** NOTE TO SPECIFIER ** Delete if Block-Flash not required. |
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| | | E. | Concrete Masonry Unit Cavity Wall Drainage System: Blok-Flash as manufactured by Mortar Net USA, Ltd. Install in strict accordance with manufacturer's instructions and as follows: |
| | | | 1. | Install on top of foundation or under first concrete masonry unit course closest to foundation, not less than 4 inches (102 mm) above finish grade. |
| | | | 2. | Install with weep spouts slightly beyond the edge of foundation or concrete masonry unit course. |
| | | | 3. | Install with standard mortar spreading techniques with mortar lapped, first over the inner and second over the outer flanges of the Blok-Flash units. |
| | | | 4. | Install 2 to 3 inches (51 to 76 mm) of pea stone in concrete masonry unit core cavity above the Blok-Flash locations to reduce clogging from mortar and grout droppings. |
| | | | 5. | Remove obstructions from weep spouts. |
| | ** NOTE TO SPECIFIER ** Delete if BlokNet not required. |
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| | | F. | Concrete Masonry Unit Cavity Wall Drainage System: BlockNet as manufactured by Mortar Net USA, Ltd. Install in strict accordance with manufacturer's instructions and as follows: |
| | | | 1. | Install mesh-side up, with weep spout in alignment with edge of foundation or first concrete masonry unit course closest to foundation, but not above interior floor. |
| | | | 2. | Caulk unmeshed end section of strip and align and butt edges of adjacent strip. |
| | | | 3. | Install one vertical 7 inch by 7 inch (178 by 178 mm) mesh unit in the core of each concrete masonry unit in first course. |
| | | | 4. | Remove obstructions from weep spouts. |
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| | 3.3 | PROTECTION |
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| | | A. | Protect installed products from damage until completion of project. |
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| | | B. | Repair or replace damaged products before covering with construction. |
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| | END OF SECTION |