Instructions / Assembly

 Install the Outside Stop

Install the outside stops on all four sides of the window’s perimeter. The stops should

overlap the face of the glass block window on all 4 sides by at least 1/2 inch. The

inside and outside stops will serve to secure your new window into place. If the stops

will be exposed to water or moisture, make sure to use a rot resistant material.

 Seal the Joints with Silicone

Seal all joints between the glass block, the stops and wood framework with a high-

quality silicone adhesive such as REDI2BOND™ Glass Block Silicone. The silicone

will provide an airtight and watertight seal around the glass block window. This step is

very important; do not leave voids or pin holes that water may seep into. Uncured

smudged or excess silicone can be cleaned up using

water and dish washing liquid.

 Finish the Exterior

Finally finish the outside of the glass block window

to complete your project.

SUGGESTION 2: USING MORTAR

- If the security feature of glass block is desirable, this method will provide the

most secure installation. –

 Remove the Old Window

Remove the window sash and any hardware that will

interfere with the installation of the new glass block

window. Ideally remove everything down to the wood

framework.

 Provide a Substrate for the Mortar to Grip or

Adhere To:

Option A) Loosely attach brick ties, stainless steel glass block panel anchors or

aluminum roofing nails with the nail heads remaining slightly up around the perimeter of

the wood frame opening. When installing, the mortar will wrap around & fasten itself to

these projections. Make sure these items and their fasteners are rust proof.

Option B) Line the wood frame opening with a cement board, such as

HardieBacker® or Durock® brands (this method can allow you to finish the inside sill,

jambs and header with ceramic tile which can be particularly nice for a bathroom

installation)

 Install the Window into the Opening

Set the new window into place on top of 2 shims. Check that it is plumb and level. Then

secure it with 2 shims at the top of the window. Do not use shims directly above or

below a joint.

Note: If you are installing a vented window, the vent latch should be located on the

inside at the top.