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Ostaco has been a leading manufacturer of custom windows and doors in southern Ontario since 1981.  We offer the solutions and options to suit all your needs. Whether it’s a new build, custom home, or a renovation, all Ostaco products are made to order.  And rest assured, you can customize without sacrificing performance. Our products are certified by the highest fenestration standards, Quality Auditing Institute and Energy Star, and are backed by an industry leading limited lifetime warranty.

Ostaco offers every type, size and colour window imaginable in all your favourite configurations. Exports 4 Less can assist you in configuring the right window at the right price for your application. Be sure to read through the flip book below or download the PDF version for full details and options.

Choose Core 3 1 ⁄4” or Core Plus

4 9 ⁄16” frame depths. Suitable for new construction, full frame replacements and retrofit applications. We’ve added even more chambers and increased our vinyl thickness over the competition. Adding insulation, sound abatement and most of all support for our “true-triple” pane glass packages.

Groove for screen installation is inside the home. Heavy-duty, multi-point locking system comes standard. Fusion welded corners provide strength and protection against air and water infiltration. Extra thick wall design for improved rigidity. Luxury folding handle sets balance style and ease of operation, even with large and heavy sashes.

NEW heavy-duty hinges support our dual and triple pane sash with effortless operation. Self-adjusting weather stripping provides the highest possible resistance to air and water infiltration. Interior groove to accommodate mouldings such as jamb extensions and 3/4” drywall return.

Provision to add windbreak to cut down on air infiltration.

Warm edge spacer(s) recessed between panes of glass minimizes glass edge conductivity. Our glass is Argon filled, with a guaranteed 90% fill rate.

Ventilated glass chamber helps prevent condensation. Core now offers “true-triple” pane glazing; 1 - 3 ⁄8” is the optimal thickness for the best energy performance and sound reduction. Select from a range of high-tech coatings, gas fills, spacers, grilles and privacy glass.

Snap-in interior glazing bead allows easy replacement of glass from the inside. Steel reinforcement available for larger size windows.

Internal screw boxes and extra walls ensure sturdy hardware attachment. Provision for installation brackets.

Ostaco Core TAB 1
Ostaco Core TAB 2

Ostaco Core & Core Plus Brochure

Download PDF Version Of Brochure HERE

Ostaco Core After Flip Book