Single Hung

Double Hung




Our commercial contract experience includes office buildings, sports facilities and hotels. It utilizes a broad spectrum of products- from aluminum storefront and curtain-wall to translucent panel systems.

Private Education

Our professional staff is regularly engaged in the private education sector, providing educational seminars, budget analysis, architectural design, spec-writing assistance and product sales- all culminating in a first quality installation.

Public Education

We have a proven track record when it comes to competitive bidding in the public sector, with a special emphasis on the Maryland public school system. In 2007, we proudly completed our fiftieth Baltimore County school window replacement project.

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Office Phone: 410-654-0019

FAX: 410-654-1266

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Single and Double-Hung (SH, DH or TH)
Windows that operate vertically utilizing a ‘counter-balancing mechanism’ in order to maintain the sash at any particular height in the opening. Sashes can be balanced using a variety of mechanisms, ranging from block & tackle to Class V ‘ultra-lift and ‘unique’ spring balances. Class V balances compensate for 70% of the actual sash weight, allowing for large sash to be easily operated. In a double-hung, both sash can be operated up and down in a vertical manner. In a single-hung unit, the top sash is mechanically fixed in place, or the glass is direct glazed into the upper section of the window, rendering it inoperable. Triple-hung units are typically units that have an additional fixed sash which is glazed with an insulated panel, in order to reduce the ceiling line, or add energy efficiency to a tall opening.
These ‘hung’ products provide a more traditional or colonial look, and generally must be more carefully maintained and lubricated to maximize longevity.

Projected- Windows (PO, PI, C or TH)
These windows come in a variety of combinations: project-out; project-in; out-swing and in-swing side-hinged casements; vertical and horizontal pivots; and top hinged. Project-out vents of any type generally perform better than other products because they possess the ‘refrigerator door effect’, that is, the harder the air and water push on the vent, the tighter the gaskets seal, just as if you pushed on a refrigerator door. These operable products are usually the product of choice when ease of operation and high performance are sought.

Horizontal Sliding Windows (HS)
Windows in which the sashes operate in a horizontal track and bypass each other are known as HS or horizontal sliders. These products are ideal for smaller openings and in applications where ease of operation and low operating force is desired, such as nursing homes and commercial residences.
These products must be wider than they are tall in order to operate without the ‘rocking sash’ syndrome. Designed to allow water into the sill track, and then weep it back to the exterior before overflowing the track. Probably not the ideal  choice for coastal environments where excessive wind and water is a factor.


Used primarily in retro-fit applications, panning is a set of specially designed aluminum extrusions, which, when mechanically joined to the new window frame, will encapsulate the old, deteriorated wood or steel. The perimeter panning can be made to mimic an historic wood window frame, or even cold-rolled steel members. The application typically saves time and money, by allowing the old frame to remain in place, thereby, all but eliminating the need for interior wall repairs. There are dozens of standard extrusions available, or custom extrusions can be devised to re-create specific profiles as desired.  Below is an Isometric Rendering of the restoration process used for this application

A thermally improved framing system, consisting of two snap-fit extrusions, used to install a window frame, i.e.- head and jambs, into a masonry opening. It provides the most complete system for the installation of a window frame into an opening, either retro-fit or new construction, without fasteners penetrating the window product itself. 
It also can accommodate slight variations in the integrity of the existing opening substrate. This method has proven to be effective in buildings that have multiple openings, or where long, continuous runs of windows exist. The system also allows for work to be performed from the exterior, by reverse mounting the receptor. This method causes less disruption and disturbance to tenants and occupants during the work day.