The OSLO Team has always been on the cutting edge of product performance improvement

 We were first to introduce the North American market to:

1.    1982, The Tilt and Turn Window, Euro-French door, Lift Slide Door, and Exterior Folding Door Systems, soon publishing nationally in Sweets Catalogue.

2.    1994, Engineered a vertical hung monumental window to meet a new Federal specification performance level of grade 60.

3.    1998, Engineered a true Euro Out-Swing Casement Window that now achieves the highest performance levels for out-swing casements in the industry.

4.    2000, First and only company to use a structural wet glazing method that improves wind load resistance and has proven 100% wood to glass leak proof.

5.    Early 2008, we started field testing our Green wood window products in several exposures on Cape Cod at the new residence pictured above.  This is a new roasted wood product, achieving unheard of standards for decay resistance, dimensional stability, water resistance, and many resource and ecological advantages.
click to see morePhotos-Roasted.html

Roasting wood is a new, high temperature, vacuum kiln, technology used to modify the chemical structure of wood in order to achieve characteristics that, up to now, were present only in very few wood species, most of them tropical species: Teak, tropical cedar, and mahogany.

        Below is an example of OSLO-America’s EURO OUT-SWING casement window made with yellow birch, roasted to a stunning dark walnut color; (click below to see other sample colors). It can be made with double sashes that open with no center post, articulating stainless steel hinges allow for easy cleaning from inside. Sashes are fastened with lever operated, multipoint locking. With this model a roll-down screen is hidden in the head, and certified lab tests prove it to be the highest performance out-swing casement in the industry. OSLO’s French doors are engineered to the same design standards.

HIGH PERFORMANCE Certified lab tests at ASTN E 1996 - 08 test procedure for Hurricane Zone 3, Missile impact and cycling pressures applied based on wind speeds up to 140 MPH, (55 psf) . Wind cycle tested to differential pressures imposed by  ASTM procedure: 9,000 times (4,500 positive, 4,500 negative.)

Water’s Edge

Marblehead Bay, MA


OSLO custom Euro out-swing high performance doors and windows; renovation ongoing to Replace +/-100 failing Pella casements needing storm windows.  All are failing and only seventeen years old.


            Long Island

Sea Side Jewel Emerging

OSLO impact rated doors and windows.

Re-visit us to follow the progress!


1890’s Summer Retreat

     North of Boston

Total restoration of this antique, 1890’s Land Mark summer retreat on a rugged Atlantic outcrop. Includes all new high performance OSLO weight and chain windows and multi-point locking doors. 

Installation completed 11/12/09

Re-visit us to follow the progress!

Austin Patterson Diston Architects / G.C. - George Vickers

Paradise Construction G.C. / Garazado Velleco Architects

Northeastern N.J.


26,000 Sq Ft. Featuring +/- 200 Euro-out-swing windows

and French doors.

Current condition, Interior painting under way.


Re-visit us to follow the progress!

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G.C. - Di Staulo Construction I, LLC


Western Connecticut Lake-side Summer Retreat

Final Rough opening prep for OSLO lift-slide doors

The two center panels slide away from each other from the center rail

Stephen Lasar Architects;  GC, Bill Separy - Dezignbuild, LLC

In early 2012 the project will be completed. Be sure to visit our Portfolios section to view completed projects!

Visit our Portfolios section to view completed projects!

Visit our Portfolios section to view completed projects!


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First OSLO replacements; third floor East bedroom, double “Euro out-swing casements” tested to winds of 190 mph.

First floor sea-side bedroom view just before replacement.