Butting against window frame, on concrete block, pre-cast or wood
- If the windowsill is to be set against the window frame, use plastic shims where needed to make level.
- Be sure that the windowsill is level before using adhesive.
- Once the windowsill is level add adhesive / Titebond Interior/Exterior construction adhesive to substrate.
- Set windowsill, check to make sure the windowsill is still level.
- Some installations may require a cleat under the lip of the windowsill until adhesive is set.
- Adhesive usually dries within 24-48 hours
Tucking under frame, on concrete block or pre-cast only
- Run a bead of adhesive onto concrete block.
- Run a bead of adhesive on the underside of windowsill.
- Tuck back of windowsill under the window frame.
- Tap front of sill down until level, keeping back of sill against frame.
- Clean any adhesive that may have come out from under front edge of sill.
- Check windowsill for final level.
- Let dry for 24-48 hours.
Tucking under window on wood framing
- Place stacks of shims until sill is raised up to window frame.
- Put adhesive over top of shims making sure adhesive also is on wood framing.
- Place sill back in opening and then level front to back with cleat if needed.
Do not remove blue protective tape for at least 4 days for all adhesives to cure properly
Adhesive recommended – Titebond Interior/Exterior construction adhesive
CRL – Shim stack Shims CAT. # KRS16 – 1-800-262-3299