Watertight Expansion Joints and Construction Sealants by EMSEAL
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BACKERSEAL Guide Specification

SPECIFICATION

Sections 07 90 00 / 07 95 00

BACKERSEAL by EMSEAL

Preformed, Pre-Compressed, Self-Expanding, Sealant System

Watertight, Energy-Efficient, Exterior and Interior Above Grade Wall Joints

PART 1 – GENERAL

1.01 Work Included

A. The work shall consist of furnishing and installing waterproof expansion joints in accordance with the details shown on the plans and the requirements of the specifications.  Preformed sealant shall be preformed, pre-compressed, self-expanding, sealant system.

B. Related Work

  • Division 4 – Masonry
  • Division 7 – Thermal & Moisture Protection
  • Division 7 – Sealants, Caulking and Waterproofing

1.02 Submittals

A. General – Submit the following according to Division 1 Specification Section.

B. Standard Submittal Package – Submit typical expansion joint drawing(s) indicating pertinent dimensions, general construction, expansion joint opening dimensions and product information.

C. Sample of material is required at time of submittal.

D. All products must be certified by independent test report to exceed the requirements of curtain wall performance tests ASTM E330, E283-04, and E331.

E. All products must be certified by independent laboratory test report to ASTM E90-09 and to meet or exceed an STC 53 in STC 68 wall and OITC 49 rating in an OITC 52 wall.

F. All products shall be certified in writing to be: a) capable of withstanding 150°F (65°C) for 3 hours while compressed down to the minimum of movement capability dimension of the basis of design product (-25% of nominal material size) without evidence of any bleeding of impregnation medium from the material; and b) that the same material after the heat stability test and after first being cooled to room temperature will subsequently self-expand to the maximum of movement capability dimension of the basis-of-design product (+25% of nominal material size) within 24 hours at room temperature 68°F (20°C).

1.03 Product Delivery, Storage and Handling

A. Deliver products to site in Manufacturer’s original, intact, labeled containers. Handle and protect as necessary to prevent damage or deterioration during shipment, handling and storage. Store in accordance with manufacturer’s installation instructions.

1.04 Basis of Design

A. All products shall be designed to meet the specified performance criteria of the BACKERSEAL product as manufactured by: (USA & International) EMSEAL JOINT SYSTEMS, LTD 25 Bridle Lane, Westborough, MA 01581-2603, Toll Free: 800-526-8365. (Canada) EMSEAL, LLC 120 Carrier Drive, Toronto, Ontario, Canada M9W 5R1 Toll Free: 800-526-8365.  www.emseal.com

B. Alternate manufacturers must demonstrate that their products meet or exceed the design criteria and must submit certified performance test reports performed by nationally recognized independent laboratories as called for in section 1.02 Submittals. Submittal of alternates must be made three weeks prior to bid opening to allow proper evaluation time.

1.05 Quality Assurance

A.The General Contractor will conduct a pre-construction meeting with all parties and trades involved in the treatment of work at and around expansion joints including, but not limited to, concrete, mechanical, electrical, HVAC, landscaping, masonry, curtain wall, waterproofing, fire-stopping, caulking, flooring and other finish trade subcontractors. All superintendents and foremen with responsibility for oversight and setting of the joint gap must attend this meeting.  The General Contractor is responsible to coordinate and schedule all trades and ensure that all subcontractors understand their responsibilities in relation to expansion joints and that their work cannot impede anticipated structural movement at the expansion joints, or compromise the achievement of watertighness or life safety at expansion joints in any way.

B. Warranty – Manufacturer’s standard warranty shall apply.

C. LEED Building Performance Requirements:

  1. Products must be proved to be certified by independent test report to exceed the requirements of curtain wall performance tests ASTM E330, E283, and E331. Product must meet or exceed hurricane-force wind loading with no deflection at both positive and negative pressures up to 4954 Pascals—equal to 200 mph winds (ASTM E330-02-procedure A).
  2. Products must be proved to have been certified by independent test report in accordance with ASTM C518-04 and demonstrate an R-Value per 1-inch (25mm) of depth of not less than 1.8 at as-installed nominal joint size compression.
  3. Products must be proved to have been certified by independent test report to ASTM E-90-09 and to meet or exceed an STC rating of 53 and OITC rating of 49

PART 2 – PRODUCT

2.01 General

A. Provide watertight, energy-efficient exterior and interior joints in vertical-plane walls (above-grade).  Typical locations include, but are not limited to the following: applications in window perimeters, other façade penetrations such as doors, store fronts, vents, HVAC units, panel to panel joints, curtain walls, control joints, between dissimilar materials, and new-to-existing connections.

B. Provide BACKERSEAL as manufactured by EMSEAL JOINT SYSTEMS LTD and as indicated on drawings for vertical expansion joint locations.

C. Preformed sealant shall be preformed, pre-compressed, self-expanding, sealant system.  Expanding foam to be cellular foam impregnated with a water-based, non-drying, polymer-modified 100% acrylic dispersion.

D. Material shall be capable of movements of +25%, -25% (50% total) of nominal material size.

E. BACKERSEAL to be installed recessed from the substrate faces and to receive a field-applied coating of low-modulus liquid sealant (by others) not to exceed ¼ inch, (6mm) thick.

F. BACKERSEAL to be installed at depth sufficient to allow installation of properly sized backer rod and liquid sealant (by others) in front of material.

G. Select the sealant system model  appropriate to the movement and design requirements at each joint location that meet the project specification or as defined by the structural engineer of record.

H. Manufacturer’s Checklist must be filled out by expansion joint subcontractor and returned to manufacturer at time of ordering material.

2.02 Fabrication

A. BACKERSEAL by EMSEAL must be supplied precompressed to less than the joint size, packaged in reels or shrink-wrapped lengths (sticks) with a mounting adhesive on one face.

PART 3 – EXECUTION

3.01 Installation

A. Preparation of the Work Area

1. The contractor shall provide a properly formed and prepared expansion joint openings constructed to the exact dimensions and elevations shown on shown on the contract drawings. Deviations from these dimensions will not be allowed without the written consent of the engineer of record.

2. The contractor shall clean the joint opening of all contaminants immediately prior to installation of expansion joint system.  Repair spalled, irregular or unsound joint surfaces using accepted industry practices for repair of the substrates in question.  Remove protruding roughness to ensure joint sides are smooth.  Ensure that there is sufficient depth to receive the full depth of the size of the BACKERSEAL being installed. Refer to Manufacturers Installation Guide for detailed step-by-step instructions.

3. No drilling, or screwing, or fasteners of any type are permitted to anchor the system into the substrate.

3.02 Clean and Protect

A. Protect the system and its components during construction. Subsequent damage to the expansion joint system will be repaired at the general contractor’s expense. After work is complete, clean exposed surfaces with a suitable cleaner that will not harm or attack the finish.

END OF SECTION