(This is a summary. See Install Data for complete instructions)
Positive-Side Access Installation
Where the construction method is to form free-standing foundation walls leaving access for installation of the waterproofing membrane from the positive (outside) of the foundation wall, the waterproofing membrane is installed up to the joint opening in accordance with the membrane-manufacturer’s instructions.
The BG System is installed into the joint. The lower flange is welded or adhered to the outside face of the waterproofing membrane. Termination bars and anchors are installed over the lower flange of the BG System extrusion to mechanically fasten the BG extrusion to the wall.
The upper flange of the BG extrusion is welded or adhered to the waterproofing membrane to encapsulate the termination bar, anchors and lower flanges. Another layer of waterproofing membrane is installed and welded or bonded over the upper flanges of the BG System. A protection course and/or drainage board is installed over the entire waterproofing membrane and integrated BG System as prescribed for the application by the waterproofing membrane manufacturer and/or designer. The walls and waterproofing system are then backfilled.
Blind Side Installation
Where the structural joint extends through the foundation slab, the waterproofing membrane is installed on the ground over the mud-slab, compacted fill or gravel as prescribed by the designer or waterproofing membrane manufacturer, as well as onto the lagged walls in accordance with the waterproofing membrane manufacturer’s instructions.
The BG System sealing gland is laid over the waterproofing membrane at the center line location of the structural expansion joint opening to be formed and cast later.
The underside of the wider of the two BG System integration flanges are welded or adhered to the installed waterproofing membrane using accessories and methods provided by the waterproofing membrane manufacturer as tested and approved for this purpose.
Another layer of the waterproofing membrane is welded or adhered over the top of the lower BG System integration flange and carried out to a width which is wider by at least six inches than the BG System integration flanges.
The upper (narrower) BG System integration flange is welded or adhered to the membrane below.
Another full width layer of waterproofing membrane is firmly, and without any voids, welded or adhered to the waterproofing membrane thereby completing a sandwich of the BG System side flashing flanges and the waterproofing membrane.
The BG System termination bar and anchors are installed to hold the system in place prior to pouring concrete.
A form is positioned over the belly of the BG System extrusion and the concrete is poured over the waterproofing membrane and BG System sandwich.
The net result is the integration of the below-grade waterproofing membrane and expansion joint system on the positive side (the side that water reaches first) of the wall or floor while ensuring that movement at the joint-gap is properly accommodated.
(Note: Termination bars and anchors may be optional at the discretion of the membrane manufacturer when fully welded into a compatible PVC or PVC-backed membrane.)
The new BG extrusion, featuring dual-level flanges, affords redundancy in anchoring and membrane integration. The BG extrusion is also used in RoofJoint product and the central gland geometry matches that of EMSEAL’s Migutan-FP sealing insert. Consequently it can be welded to RoofJoint across tunnel roofs and under softscaped plazas to ensure continuity of seal.
Similarly, in hard-scaped plaza and split-slab conditions, the new BG System glands can also be welded to the rubber sealing components (central insert and side flashing sheets) of our other FP (For Plaza) systems including MIGUTAN-FP, SJS-FP, DSM-FP, and SJS-FP-FR to ensure continuity of seal.
Transition from below grade walls to above grade walls sealed with Seismic Colorseal is also practically achieved using the appropriate detail for this condition from EMSEAL.
Factory-fabricated transitions–inside 90’s; outside-90’s; tees; crosses; and custom configurations–are available.
Termination at Footings (no joint in slab)
Where the structural joint is designed only in the walls and does not continue through the foundation slab, the BG System is integrated into the waterproofing membrane on the walls and must terminate at the concrete footings at a point designed to be below the elevation of the slab and into a properly designed, active, perimeter drainage system. Details of flashing skirts for footing termination are available from EMSEAL.
Positive Side Installation:
EMSEAL offers a limited 5-year warranty for installations on the positive side of freestanding foundation walls.
Blind-Side Formed Installation:
The BG System is a solution to the difficult problem of sealing expansion joints in blind-side formed foundation conditions created through the choice or need to cast concrete against lagging rather than casting freestanding foundation walls.
The specification of the BG System is made as a consequence of the designer’s recognition of the merits of the principle of the BG System solution. Likewise specification of the BG System is made with the designer’s and owner’s understanding of the need for proper installation and control and protection of the system throughout the construction process that includes the placement of rebar, setting of forms and casting of concrete over the already placed waterproofing membrane and BG System.
Because the BG System is heavily dependent on proper workmanship during installation, and protection after it is installed and before and during concrete placement, EMSEAL offers no warranties for watertightness in blind-side formed applications. EMSEAL assumes no responsibility and supplies no warranty for the workmanship of the contractors involved in any part of site preparation and/or installation of the BG System in blind-side conditions, or for the finishing of any part of the related work on any project.
The BG System will not perform in conditions that are unsuitable to the requirements for performance of the waterproofing membrane materials into which the BG System is integrated (consult the waterproofing membrane manufacturer).
3rd Party Single Source Warranty Covering Both the Waterproofing Membrane and BG System Expansion Joint:
Available through select waterproofing membrane manufacturers a watertight limited warranty covering installations under slab and on positive or blind side wall applications is available from the waterproofing membrane manufacturer when the joint is installed as a component with their specific waterproofing membrane and under their terms of site supervision and training. Consult EMSEAL.
Availability & Price
- Available for shipment internationally.
- Prices are available from local distributors or representatives and/or directly from the manufacturer.
- The product range is continually being updated, and accordingly EMSEAL® reserves the right to modify or withdraw any product without prior notice.