Ultra Series windows and doors are constructed of Pine as standard (shown top left), for a stable product that will accept many beautiful finishes. But don't let that limit your plans. Other wood species may be requested, such as (top row:) Alder, Fir, Oak,(bottom row:) Cherry, Maple, Walnut, Mahogany and more.

Many of these woods are available with FSC certification! Learn more.

People choose wood windows and doors for their natural beauty, yet it's important to plan for the effects that can occur to wood in a real-life setting. Exterior wood components of Ultra Series windows & doors are immersed in a preservative treatment before assembly. The preservative incorporates an insecticide and a fungicide, which helps the wood resist decay. The treated wood meets preservative and water repellency requirements of WDMA I.S.4-2000.

From the selection of wood to delivery of the final product, Kolbe meets strict standards for quality construction. For instance, windows are sealed on both sides of the glass. Half-rounds are constructed with doweled joints and turnbuckles at critical stress points for stability. Interior removable wood grilles have a full perimeter frame for stability.

Ultra Series frames are screwed at the corners, with silicone to seal corner junctures and screw openings. Corner keys add stability and are filled with silicone as well. Ultra Series units have applied nailing fins to ease installation. Drip caps are integral to the nailing fins, to divert water, and further protect the product. Plus, selected products have concealed mullion stiffeners comprised of 1/4" steel bars, for incredible strength. Entrance doors are built with laminated veneered lumber on the locking stiles for strength and security. Most door stiles and rails are joined using the dowel-and-glue method. Weatherstripping is strategically placed to enhance the insulating properties. Jambs on most products are 4-9/16", with the option of having extension jambs factory-applied.

At Kolbe, we employ craftspeople that care about the products they build. Units are carefully assembled, hardware are applied, glass is set in, and optional grilles may be installed or applied… sash are installed into frames, then units are wrapped for protection during shipping. We are dedicated to making the best windows and doors, and to ensuring that they arrive in the best possible condition.

Many Ultra Series products may be ordered as K-Force Impact Products. With K-Force upgrades, the products include impact glass and various high performance modifications, based upon the level of performance desired. Learn more about K-Force Impact Products.

Ultra Series products have dual-insulating glass units with LoE²-270 coating, argon gas, and Thermo-Edge spacers on most units as standard. This helps them to meet or exceed current ENERGY STAR® guidelines for energy efficiency in all climate zones.

However, energy requirements are becoming more stringent, with lower U-values and solar heat gain coefficients necessary to be eligible for federal tax credits. That's why we've added the options of ThermaPlus LoE²-270 and ThermaPlus LoE³-366, which augment the LoE options with ThermaPlus LoE hardcoat and extra coating on a dual-insulating glass unit's interior surface. Plus, Majesta Double Hungs are available with a triple-pane insulating glass option.

Many other glass options are available as well, such as LoE²-240 for solar control in southern areas, LoE³-366, patterned, obscure glass for privacy or decorative glass for an artistic touch.

Tempered glass is standard on doors for safety and may be requested for windows as well. Laminated glass is available for additional safety. Impact glass is available for extra protection and safety in severe weather areas. Learn more about Glass types.

Plus, Kolbe offers the option of protective film on glass, to help reduce the potential for damage and ease cleanup after installation on the jobsite.

Gilkey has other options available including Heat Mirror triple pane glass and Mini-Blinds between the glass. Ask your representative about all of our glass options.

A durable .050" thick cladding of 6063 extruded aluminum alloy is press-fit onto the exterior wood frames and sash of most Ultra Series windows and doors. For even more durability, swinging patio doors and entrance doors have .062" thick cladding on the sash exterior.*

As standard, Ultra Series aluminum cladding is finished with a fluoropolymer coating, which carries up to a 30-year warranty.

Custom anodized metallic finishes are also available to make the aluminum cladding of Ultra Series windows and doors really shine.

*Doors with raised panels use a .040" thick, 1100 extruded aluminum on the raised panels.

Most wood products are unfinished on the interior as standard, but many options are available. Units may be interior primed at the factory for finishing on the jobsite, or have final finishes applied at the factory, such as clear coat, stain, and paint. Plus, these superior products have the additional option of a custom, unique wire brush finish.

View our interior finish page for details about the primer, stains, paint and more.

Ultra Series offer a wide variety of accessories. Extruded aluminum provides strength, yet the designs offer the architectural style of traditional wood windows. Options include various styles and widths of brickmould casing for windows and doors, and sill nosing for windows. Frame expanders, trim receivers, mull covers and many other extruded accessories are available as well. Learn more about extruded aluminum trim.

Wood is perfect for crafting, so interior wood casing and trim options are virtually limitless. Corner blocks or rosettes add a special touch. Feel free to ask about wood casing, especially for hard-to-match radius windows. Learn more about interior wood trim.