Linetec adds 90-degree strut thermal improvement capabilities

90-degree thermal strut in a single step

90degree-strut-Schmidlapp-Close-Up-(3)Linetec is one of very few companies in North America to provide 90-degree thermal strip with a single pass using Technoform Bautec’s polyamide insulating strips and Müller Technologies AG’s knurling equipment to install the strip simultaneously on two planes of material,” explains Bart Hensley, sales engineer at Technoform Bautec.

The need for direct access from both sides has always been a design limitation of strip systems. This new capability frees up window and curtainwall designers to detail changes in place more efficiently, using a single assembly, rather than multiple pieces – without compromising energy efficiency or condensation resistance.

When installing thermal strip, Linetec follows the requirements of AAMA QAG-2-12, “Voluntary Quality Assurance Processing Guide for Polyamide Thermal Barriers.” First, the inside and outside aluminum profiles are finished in anodize, liquid paint or powder coating. Different colors and finishes may be used on each profile as the aluminum is extruded independently with a cavity that will receive the strip.

90degree-strut-extr              90degree-strut-equip

During the assembly process, knurling produces “teeth” in the aluminum pocket that “bite” into the strip and ensures appropriate shear strength of the composite profile. As material passes through the knurler, the strip is inserted into the extrusion cavity. The crimping process mechanically locks the aluminum and strip, forming the bond between the two extrusions and the strip.

Traditional 90-degree thermal strip installation was time-consuming where each piece is knurled up to three times before crimping and shear testing. This amount of handling increases the potential for marring and damage to the finished material. This new 90-degree thermal strip process employed by Linetec’s  reduces the knurling to one step. This not only saves time and labor, but also minimizes inconsistencies and waste, holds customer-specified tolerances for U-Factor and shear testing, and delivers a high-quality finished product.

Technoform thermal barrier system installed at Houghton Academy

 

Buffalo Public School #69 – Houghton Academy

Linetec, Wausau Window and Wall Systems and Technoform Bautec North America, Inc., contribute to the updated appearance and enhanced performance of historic Houghton Academy in Buffalo, N.Y. Along with refreshed façade, the elementary school’s modern windows feature Technoform Bautec’s polyamide thermal barrier for energy efficiency, structural performance and long-term durability.

Buffalo Pulic School #69

Buffalo Public School #69

Glazing contractor T.G.R. Enterprises replaced 125 of the building’s outdated windows with Wausau Window and Wall Systems’ high-performance units. These windows were finished by Linetec and customized to match the elementary school’s architectural aesthetic using a Sandstone color paint on the exterior and a Dark Bronze anodize on the interior.

Constructed in 1924, Buffalo Public School #69 Houghton Academy was designed by the Associated Buffalo Architects Inc. The U-shaped floor plan surrounds a courtyard in the rear and a Classic Revival style entrance in the front. The brick and stone structure is punctuated with large window bays. As time passed, the windows were replaced without preserving the architectural integrity. This resulted in inconsistent window types, trim and colors.

HoughtonAcademy-inerior-technoform-bautec“Choosing different color schemes and finish types for the interior and exterior of a high-performance aluminum window system can be achieved within budget and on accelerated timelines,” says Chad Ricker with Technoform Bautec’s market team. “Because two different finishing types were used on Houghton Academy windows — paint and anodize, any other thermal barrier method would not have been an option for this project.”

To ensure a successful result, the glazing team relied on Wausau’s 310i Series single-hung and 4250i-XLT INvent™ Series project-out windows. Both are manufactured using Technoform Bautec’s polyamide thermal barriers, known generically as “thermal strip.”

For two-color frame finishing using paint at the interior and exterior, Linetec estimates that Technoform Bautec’s thermal strip system painted assemblies are 400% less expensive than other thermal barrier methods that require time-consuming masking. read more

Thermal Improvement Services

The main function of a thermal break system is to separate an aluminum profile into two parts to reduce thermal conductivity in a window. The two ways of doing this are by using poured polyurethane or polyamide insulating strips.

Aluminum is a highly thermal conductive material that will rapidly transfer exterior climatic temperature unless something is done to stop the thermal conduction. A thermal barrier system will improve thermal performance while maintaining the structural and long-term durability of the fenestration unit.

When considering structural longevity, wind loads in high rise buildings and in curtain wall applications, composite materials that perform both efficiently and structurally are demanded. Thermal barriers are true structural insulators that maintain an extremely high shear modulus for windloads.

Thermal Pour and Debridge

Thermal Pour and Debridge

Polyurethane’s pour and debridge systems are formulated for these exacting applications. Azon thermal pour and debridge offers tremendous performance, protecting against temperatures of -100C (-148F). Extreme cold, nor hot temperatures, will transfer through an aluminum frame with pour and debridge thermal barrier.

Thermal Strut involves two separate extrusions and joins them through the use of engineered structural plastic strut. Both the inside and outside aluminum profiles are extruded independently with a cavity that will ultimately receive the strut.

Thermal Strut Process

Thermal Strut Process

With Technoform thermal strut, products can be manufactured with two-tone finishes; because interior and exterior components can be coated before assembly. Architects and designers can choose to apply the interior and exterior finishes that best match their cost, performance and design requirements.

Thermal Strut offers increased energy savings with varying thermal separation widths.

A thermal barrier system will improve thermal performance while maintaining the structural and long-term durability of the fenestration unit. Customers that choose Linetec, can rely on our thermal barrier service to ensure optimal performance of the thermal barrier.

For additional information on thermal improvement services visit Linetec’s website.