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| | SECTION 04090 |
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| | MASONRY ACCESSORIES |
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| | Copyright 2003 - 2005 ARCAT, Inc. - All rights reserved
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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:
541 S. Lake Street
Gary, IN 46403
Tel: (800) 664-6638
Fax: (219) 939-3877
Email: ebickett@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 accessories including the following: |
| | ** NOTE TO SPECIFIER ** Product names for applications listed below are Mortar Net, Residential HouseNet, Weep Vent, Blok-Flash, BlockNet and TotalFlash by Mortar Net USA. Delete types not required. |
| | | | 1. | Open mesh to collect and suspend mortar droppings in commercial multi-wythe masonry cavity walls. |
| | | | 2. | Open mesh to collect and suspend mortar droppings residential multi-wythe masonry cavity walls. |
| | | | 3. | Weep vents for masonry walls. |
| | | | 4. | Flashing system for single-wythe concrete masonry walls. |
| | | | 5. | Drainage system for single-wythe concrete masonry walls. |
| | | | 6. | Flashing/drainage system for multi-wythe masonry cavity walls. |
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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 Ltd.; 541 S. Lake Street, Gary, IN 46403. ASD. Tel: (800) 664-6638. Fax: (219) 939-3877. Email: ebickett@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 ** Mortar Net recommended by manufacturer for commercial construction; House Net recommended for residential construction. Delete paragraphs and associated text for products not required. |
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| | | A. | Open Mesh to Collect and Suspend Mortar Droppings in Commercial Multi-Wythe Masonry Cavity Walls: Mortar Net with Insect Barrier as manufactured by Mortar Net USA, Ltd. |
| | | | 1. | Description: 90 percent open weave mesh in trapezoidal configuration connected by continuous bottom strip 3 inches (76.2 mm) high. |
| | ** 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. |
| | | | 2. | Material and Thickness: Mortar Net MN 10-1, 10 inches (254 mm) high by 1 inch (25 mm) thick, partial recycled nylon material. |
| | | | 3. | Material and Thickness: Mortar Net MN 10-4, 10 inches (254 mm) high by 0.4 inches (10.2 mm) thick, partial recycled nylon material. |
| | | | 4. | Material and Thickness: Mortar Net MN 10-2, 10 inches (254 mm) high by 2 inches (51 mm) thick, partial recycled polyester material. |
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| | | B. | Open Mesh to Collect and Suspend Mortar Droppings in Commercial Multi-Wythe Masonry Cavity Walls: Mortar Net with Insect Barrier as manufactured by Mortar Net USA, Ltd. |
| | | | 1. | Description: 90 percent open weave mesh in trapezoidal configuration connected by continuous bottom strip 3 inches (76.2 mm) high. The insect barrier fabric is attached to the face of the trapezoidal Mortar Net material. |
| | ** 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. |
| | | | 2. | Material and Thickness: Mortar Net/Insect Barrier MN 10-1, 10 inches (254 mm) high by 1 inch (25 mm) thick, partial recycled nylon material. |
| | | | 3. | Material and Thickness: Mortar Net/Insect Barrier MN 10-4, 10 inches (254 mm) high by 0.4 inches (10.2 mm) thick, partial recycled nylon material. |
| | | | 4. | Material and Thickness: Mortar Net/Insect Barrier MN 10-2, 10 inches (254 mm) high by 2 inches (51 mm) thick, partial recycled polyester material. |
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| | | C. | Open Mesh to Collect and Suspend Mortar Droppings in Residential Multi-Wythe Masonry Cavity Walls: Residential HouseNet as manufactured by Mortar Net USA, Ltd., recycled polyester; 90 percent open weave mesh, dovetail configuration with continuous bottom strip. |
| | | | 1. | Description: 90 percent open weave mesh in trapezoidal configuration connected by continuous bottom strip 3 inches (76.2 mm) high. |
| | ** 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. |
| | | | 2. | Material and Thickness: Residential HouseNet, 7.5 inches (190 mm) high by 1 inch (25 mm) thick, high-density polyethylene material. |
| | | | 3. | Material and Thickness: Residential HouseNet, 7.5 inches (190 mm) high by 0.4 inches (10.2 mm) thick, nylon material. |
| | | | 4. | Material and Thickness: Residential HouseNet, 7.5 inches (190 mm) high by 2 inches (51 mm) thick, recycled polyester material. |
| | ** NOTE TO SPECIFIER ** Delete if Weep Vent not required. |
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| | | D. | Weep Vents for Masonry Walls: 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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| | | E. | Flashing System for Single-Wythe Concrete Masonry Walls: Blok-Flash as manufactured by Mortar Net USA, Ltd., high-density polyethylene composition molded into a 0.0625 inch (1.59 mm) thick flashing pan with 0.3125 inch (7.94 mm) perimeter flanges with integral concaved weep spout and drip edge. |
| | ** NOTE TO SPECIFIER ** Delete two of three following paragraphs. BF08 is for 8-inch-wide CMU; BF10 is for 10-inch-wide CMU; and BF12 is for 12-inch-wide CMU. |
| | | | 1. | Type: BF08 - Blok-Flash 8 Inch; 5-5/8 inches (143 mm) width, 6-3/4 inches (171 mm) length. |
| | | | 2. | Type: BF10 - Blok-Flash 10 Inch; 7-5/8 inches (194 mm) wide, 6-3/4 inches (171 mm) length. |
| | | | 3. | Type: BF12 - Blok-Flash 12 Inch; 9-5/8 inches (245 mm) wide, 6-3/4 inches (171 mm) length. |
| | ** NOTE TO SPECIFIER ** Delete if BlokNet not required. |
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| | | F. | Drainage System for Single-Wythe Concrete Masonry Walls: BlockNet #BN120 CMU Drainage System as manufactured by Mortar Net USA, Ltd. |
| | | | 1. | Drainage Strip: #BN121, 28 gage stainless steel, 4 inches (102 mm) wide by 60 inches (1524 mm) long with formed drip on the face edge and drainage mesh factory attached. |
| | | | 2. | Vertical mesh Sleeve: #BN122, 7 by 7 by 3/8 inch (177 by 177 by 9.5 mm) thick polyester mesh. |
| | | | 3. | Sealant: One part silicone acceptable to drainage system manufacturer. |
| | ** NOTE TO SPECIFIER ** Mortar Net's TotalFlash system is designed to replace traditional flashing systems. Custom configurations for headers and door openings are available. Patented TotalFlash cavity-wall drainage system slashes labor costs while boosting moisture-protection. Delete if TotalFlash not required. |
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| | | G. | Flashing/Drainage System for Multi-Wythe Masonry Cavity Walls: TotalFlash as manufactured by Mortar Net USA, Ltd. System consists of the following components: |
| | | | 1. | Flashing Membrane: 40 mil polymeric, UV stable membrane, incorporating DuPont's Elvaloy KEE polymer. |
| | ** NOTE TO SPECIFIER ** Delete panel sizes not required. |
| | | | | a. | Panel Size: 12 inches (305 mm) by 66 inches (1676.4 mm). |
| | | | | b. | Panel Size: 15 inches (381 mm) by 66 inches (1676.4 mm). |
| | | | | c. | Panel Size: 18 inches (457 mm) by 66 inches (1676.4 mm). |
| | | | | d. | Panel Size: 24 inches (610 mm) by 66 inches (1676.4 mm). |
| | | | 2. | Mortar Collection Device/Weep Tabs: Mortar Net Drainage/Weep System; recycled polyester material impregnated with UV protection, biocide and flame retardant, 3/8 inch (4.7625 mm) thick, 10 inches (254 mm) high, 66 inches (1676.4 mm) long. Woven mesh designed to allow moisture to migrate to the integrated weep tabs; product adhered to the flashing membrane. |
| | ** NOTE TO SPECIFIER ** Delete stainless steel drip edge if not required. |
| | | | 3. | Mortar Net Stainless Steel Drip Edge: 28 gage (0.014 inches)(0.356 mm) Type 304 stainless steel with formed drip edge pre-attached to flashing and designed to divert moisture away from the wall, 3 inch (76.2 mm) width, 5.4 feet (1625.6 mm) long. |
| | | | 4. | Adhesive: Multi-purpose structure sealant with no slump and moisture cure, for lapping TotalFlash Sections, as approved by manufacturer. |
| | | | 5. | Mortar Net Termination Bar: Pre-attached termination bar to fasten flashing system to substrate or to be tucked into mortar joint; manufactured from high-strength corrosion-resistant plastic with pre-drilled holes for attachment, 5 feet (1524 mm) long with 6 inch (152 mm) hole spacing. |
| | | | 6. | Screws: Self-tapping hex head screws, #14 by 2 inches (51 mm). |
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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 |
| | ** NOTE TO SPECIFIER ** Delete installation methods below that are not required. |
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| | | A. | Open Mesh to Collect and Suspend Mortar Droppings in Commercial Multi-Wythe Masonry Cavity Walls: 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 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 one continuous row of Mortar Net at base of wall in cavity and over all wall openings directly on flashing, with dovetail profile facing upward. Butt ends together. Compress slightly if necessary. |
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| | | B. | Open Mesh to Collect and Suspend Mortar Droppings in Residential Multi-Wythe Masonry Cavity Walls: Residential HouseNet 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 HouseNet to at least 6 inches (152 mm) above the top of the HouseNet to prevent mortar bridging between the outer wythe and inner wall. |
| | | | 3. | Remove mortar droppings and debris from flashing and weep holes. |
| | | | 4. | Install one continuous row of HouseNet at base of wall in cavity and over all wall openings 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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| | | C. | Weep Vents for Masonry Walls: 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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| | | D. | Flashing System for Single-Wythe Concrete Masonry Walls: 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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| | | E. | Drainage System for Single-Wythe Concrete Masonry Walls: 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. | Form continuous drainage strip drainage system along entire perimeter of wall. |
| | | | 4. | At second CMU course, install one vertical mesh sleeve in each core. Install against inside face of outside shell to form U-shape sleeve. |
| | | | 5. | At drainage system over doors, windows and along bond beams, dam ends of drainage strips. |
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| | | F. | Flashing/Drainage System for Multi-Wythe Masonry Cavity Walls: TotalFlash as manufactured by Mortar Net USA, Ltd. Install in strict accordance with manufacturer's instructions. |
| | | | 1. | Install in proper relationship to adjacent construction. |
| | | | 2. | Install using adhesive applied horizontally at termination bar and drip edge, and vertically at ends of panels. |
| | | | 3. | Caulk top of termination bars. |
| | | | 4. | Install rigid board insulation over TotalFlash as recommended by manufacturer. |
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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 |