Core Series
 Core Construction:
 Multi-chambered design reduces exterior noise, adds insulation and strength and provides thermal efficiency.- Multiple weather-stripping provides outstanding protection against the elements.Up to 5 weatherstrips help reduce heating and cooling costs.
- Screen channel designed for screen removal from inside your home.Half screen and full screen are available.
- Welded frame and sash corners provide strength and protection against air and water infiltration.
- Snap-in interior glazing bead allows easy replacement of glass from the inside.
- Double-walled sash design for superior strength.
- Excellent drainage system evacuates the heaviest rains.
- Provision to add windbreak to cut down on air infiltration.
- Extra thick wall design for improved rigidity.
- Interior groove allows the addition of mouldings such as 3/4" wood return, wood jambs or all u-PVC jamb extension.
- Provision for installation brackets.
- Tilt option available for easy cleaning
- New Ostaco "inLighten" screen is available.
Core Series Double Hung/Sliders Performance Ratings
| Air Infiltration Resistance |
A3
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A3
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A3
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A3
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| Water Infiltration Resistance |
B3
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B4
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B3*
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B4
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| Wind Load Resistance |
C4
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C5
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C3
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C2
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| Forced Entry Resistance |
F10
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F10
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F10
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F10
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Core Series and Core Plus Series windows are Energy Star approved. Performance chart by USWADA.
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Core Series
Double Slider & Double Hung Windows
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This is perfect for older households with 2x4 construction, as our Core Series is designed to fit thinner 3 1/4" wall construction. |
Wood Extension Options
- Available with a wide variety of wood extensions from pine to oak.
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Colour
- White, or exterior painted in your choice of colour.
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Glass options
- Standard Low E2;
- our latest comfort technology LowE3;
- or our new Low E 179c
(the best ER rating in the entire world!).
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Options
- A wide range of decorative grilles and energy-smart glazing options are available to give your window a custom-designed look.
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Testimonials
We are very pleased we selected Ostaco windows and doors. The installation was flawless and the results spectacular. The new windows enhanced our ...
Trish and Ronald Walker
Your windows and doors came very highly recommended. My new house looks spectacular. I am glad I listened to the recommendations given to me.
Frank Chanady
It was most appreciated and we are pleased to see such good service at Lambden
J. and B. Madden, Ottawa, ON
To Dundas Wood Windows:
Nelson, just wanted to write a quick thank you note to you and your team for the fine job you did with our new Ostaco ...
Robert (Rob) Ribarich
We are very delighted and pleased with your excellent job and most impressed with the polite and professional staff...
E. Byers, Smiths Falls, ON
