Commercial Window Replacement in Tulsa, OK

The difference between commercial and residential windows is in their performance class, which the window industry says is chosen by the loads a window must take, not the building type. The North American window standard's classes, as first described: R for one- and two-family homes, LC for low- and mid-rise multifamily, CW for low- and mid-rise buildings with larger sizes and loads, and AW for high- and mid-rise buildings, with minimum performance grades of 15, 25, 30 and 40.

An AW or CW window rating is a performance class under the North American window standard. CW windows have a minimum performance grade of 30 and AW windows 40, and both carry a deflection limit of L/175, which makes the frames and sashes stiffer. The window industry's association notes that the class is chosen independently of the building's use.

The EPA lead rule applies in schools and churches to their child-occupied facilities: parts of a pre-1978 building visited by the same child under six on at least two days a week, three hours a day, six hours a week and 60 hours a year, like preschools and kindergarten classrooms, plus the exterior walls right next to them. Replacing any size window there counts as renovation, and pre-1978 housing a church owns is covered too.

Church stained glass usually should not get protective glazing: the National Park Service says that in most cases the potential drawbacks outweigh the benefits. It is warranted for a real vandalism or security threat, original plating, or a UV filter protecting epoxy repairs. When absolutely necessary, it should be ventilated and set in its own frame 5/8 inch to 1 inch from the leaded glass.

Commercial buildings need safety glass in hazardous locations under Oklahoma's 2024 International Building Code (section 2406.4): glass in doors, with narrow exceptions, glass within 24 inches of a door edge whose bottom is under 60 inches above the floor, and window panes over 9 square feet that sit under 18 inches from the floor, reach above 36 inches and have a walking surface within 36 inches.

The ADA rules for commercial doors, in the 2010 ADA Standards, call for a clear opening of at least 32 inches with the door open 90 degrees (404.2.3), hardware 34 to 48 inches above the floor that works with one hand and no tight grasping (404.2.7, 309.4), a closer that takes at least 5 seconds from 90 to 12 degrees (404.2.8.1), and thresholds no higher than 1/2 inch (404.2.5).

The energy code for commercial windows in Oklahoma is the 2006 International Energy Conservation Code. The state's rule adopting the 2024 International Building Code, effective September 14, 2026, changes the building code's energy code reference to the 2006 edition (OAC 748:20-2-40). Ask the permit office which energy requirements apply to your project.

PSO's business rebates do not include replacing windows or entry doors. Its Insulation, Windows and Doors category pays $2 per square foot for qualifying window film on the inside of existing clear glass in commercial buildings, film with a solar heat gain coefficient below 0.50, and $0.50 to $30 per foot for door weather stripping.

Usually not for same-size, same-location window replacement: the City of Tulsa lists replacing existing windows of the same size and location among work that needs no permit, though it says a permit is typically required to repair walls, floors, ceilings, windows or doors. Doors and changed openings are not on the no-permit list. Tulsa Development Services: (918) 596-9456.

T Town's own crew does every commercial job, with no subcontractors. It is a trained, long-time crew; the brothers who own the company, Andrey and Vadim, supervise the work and help with materials, and bring in extra hands they have worked with before on big jobs.