SOLERA® T insulated translucent glazing units (TGUs) are made of two tiles of glass with a high performance translucent insulating core. A special perimeter spacer is used, along with an interior Lite
that is smaller than the exterior lite, in order to create a ‘mounting offset’ to facilitate installation in
standard curtain wall systems. The SOLERA® T TGU has a nominal overall thickness of 2.5 inches plus
interior and exterior glass lite thicknesses, and a nominal mounting offset thickness of 3/4″ plus exterior
lite thickness. All SOLERA® units use a stainless steel capillary tube vent ( not to be crimped) to maintain
both pressure and moisture equilibrium within the glazing unit.
The following guidelines have been developed for specification writers, frame manufacturers and
installers to convey the installation requirements of the SOLERA® unit which will ensure satisfactory, long
term performance. It is recommended that this document be read in conjunction with the SOLERA®
Warranty Document, and industry standard recommended practices documented by Insulating Glass
Manufacturers Alliance (IGMA). The user is encouraged to contact Advanced Glazings Ltd. directly for
advice on specific glazing installations.
- The SOLERA® TGU is manufactured using a wide range of architectural glass types and thicknesses.
The glass specified for the SOLERA® TGU must be selected by the user to meet project-specific
objectives as well as national and local building codes.
- Frame and sash must physically accommodate the thickness of the SOLERA® TGU. Designers should
consider the fitting of the mounting offset into the curtain wall or skylight glazing pocket,
clearance of the interior protrusion and any possible interference with features like drip gutters,
as well as any other issues that may arise. (See reference drawing 300-3027-12).
- Framing system must be designed to meet project specific objectives as well as national and local
- The unit must be sealed to the interior to prevent the migration of moisture into the “intra-frame
cavity” from the building interior.
- Glazing installation must ensure that the “intra-frame cavity” is drained and vented to the
outside. This helps prevent the build up of high-humidity air, allows for the draining of standing
water, and ensures pressure equilibrium (reference drawing 300-3005-12). Frame vent holes
should meet IGMA’s recommended minimum size requirements.
- Manufacturer’s labeling identifies the orientation required (Inner Lite/This End Up). Proper
orientation ensures that the open end of the stainless steel capillary pressure equalization (vent)
tube is positioned in a downward direction and located at the top right corner of the unit, as viewed
from the building exterior (see drawing 300-3002-12).
- The vent tube must be free of any obstructions. SOLERA® T vent tubes must not be crimped.
- Interior and exterior lites must be supported by setting blocks, and spacers must be installed on
vertical edges. Setting blocks and spacers must be adequate to prevent direct contact between
glass and frame in all circumstances.
- The glazing rebate (i.e. clearance between frame and TGU) must be clear of any protrusion except
for glass support setting blocks or spacer shims. The setting blocks that support the exterior lite
should be designed or positioned to allow water passage to the weep or vent holes.
- The glazing stops must provide plane, continuous and uniform supports for the surfaces of the
- Frame joints must be adequately sealed to prevent water and air infiltration.
- Under no circumstances should the edge of the TGU be allowed to sit in water.
- Edge clamping pressure must be sufficient to achieve an air and water tight seal but must not
exceed 10 lbs. per linear inch to avoid risk of unit damage.
- Frame members must be structurally designed to withstand the wind loads and dead loads
transferred by the SOLERA® TGU. Each frame member should be stiff enough not to deflect more
than the lesser of length/175 or 3/4 “ at full design load. All edges of the sealed unit must be
supported to resist wind and other loads. The minimum bite on exterior lite and the mounting
offset should be 13mm (½”) in order to firmly support the insulating glass unit when exposed to
static and dynamic loads.
- In vertical installations, the gap between the edge of the interior lite and the frame may be
finished by use of a dry gasket (reference drawing 300-3028-12), or a glazing stop (reference
drawing 300-3034-12). Alternatively a bead of sealant may be used to finish the gap.
- Sloped overhead installations require use of a glazing stop (reference drawing 300-3034-12) in
order to positively retain the interior lite in the event of unit failure. Dry gasket finish may not be
- The use of structurally adequate thermally broken frames is recommended with the SOLERA® TGU
to improve energy performance and minimize condensation on interior surfaces in cold weather.
The thermal stress on the TGU is also reduced when thermally broken frames are used.
- Glazing clearances must be sufficient to accommodate manufacturing tolerances in the unit size
and overall thickness and to ensure that the unit “floats” within the retaining system (reference
- In certain circumstances, SOLERA® T units may be glazed in curtain wall systems without the use of
pressure caps by means of a structural glazing adhesive. Architects or contractors must contract
Advanced Glazings Ltd. for approval of any non-clamped, structurally-glazed installations.
- For a complete and finished look, available is a three sided and sill rubber gasket that can be
purchased with your order. It is sold per linear foot. For installation, run a bead of compatible
adhesive along the gasket. See document 300-3051-12. Three sided gasket is to be placed on both
sides and top of TGU and sill gasket is placed along the bottom of the TGU.
For more information please contact Advanced Glazings Technical Support at 888-GLAZING (888-452-0464)