Sigma Bracket - Stainless Steel

ECO Cladding Sigma Universal Stainless Steel Thermal Wall Bracket

Not just universal... address your building’s U-value with Sigma U Brackets.

Thermal bridging can be responsible for a structure’s heat loss. What is a 'thermal bridge'? The calculations around thermal bridges are rather complicated and intricate, but essentially, thermal bridges are the points at which conventional building design loses energy. They are often unaccounted weak points in the building envelope resulting in high local discomfort, moisture, and mold while providing a highway for energy loss.

ECO Cladding’s Sigma U (Universal) stainless steel wall brackets are designed to address the instance of thermal bridging for certain applications. Sigma U wall brackets have low thermal conductivity and an isolator pad which reduces heat loss and significantly decreases thermal bridging.

Sigma U Brackets are designed to simplify the building rainscreen walls of all types by providing one ‘universal bracket’ for both horizontal and vertical orientation. Sigma U Brackets are available in multiple sizes to create various cavity depths. The number of fasteners back into the substructure will be optimized based on load requirements and backup wall type. 

Key Sigma Features:

  • Thermally Broken System - Pre-installed isolator pad provides material separation and thermal break. Made of enhanced thermal resistant material. Achieve U-values to meet ASHRAE 90.1.

  • Self Adjusting - Up to 1.5” of internal adjustability. Level and plumb not a problem. Cavity depths from 2” to 12”. Helping hand acts like another laborer on your team.

  • Universal Bracket - Both vertical and horizontal are achieved in one bracket. Stiffening ribs create optimal engineering design.

  • Non-combustible - Fire resistance to address fire codes.

  • Recycled Content - Sigma U brackets offer an excellent recycled content profile with 18.29% pre-consumer and 63.77% post-consumer.

  • High-Grade Material - Grade 304 stainless steel is pre-punched and accommodates heavy rainscreen panels and high wind loads.

  • Made In USA - American-made steel. Buy America / Buy American advantage. 



Available in both vertical and horizontal designs, Sigma brackets are available in multiple sizes to create various cavity depths.

Submit your project to us using our Build Your Project submission process and we can assist!


U.22.50” – 3.75”YesYes
U.33.25” – 4.75”YesYes
U.44.25” – 5.75”YesYes
U.55.25” – 6.75”YesYes
U.6 6.25” – 7.75”YesYes
U.77.25" - 8.75"YesYes
U.88.25" - 9.75"YesYes
U.99.25" - 10.75"YesYes
U.1010.25" - 11.75"YesYes
U.1111.25" - 12.75" YesYes
U.1212.25" - 13.75"YesYes

Bracket Design Benefits

Fixed and Sliding Points

The wall bracket fixed point carries the dead loads and windloads to the load-bearing wall. The connection between the wall bracket and profile is fastened immovable in the “round hole”.  The connection between the wall bracket sliding point and the profile is designed for thermal linear expansion and contraction. For a sliding point, only wind pressure loads are carried to the load-bearing wall.

Thumb Hold Feature - Built In Adjustability 

Two advantages in one!  Our wall brackets give installers an “extra hand” while they get the wall level and plumb and the “thumb-hold” feature of our brackets allows the system to have a +/- 3/4” adjustment without the need for external shims. The thumb hold design feature creates huge labor savings.

Bracket Sizes

Shallow or deep, ECO wall brackets can accommodate your building’s cavity depth.  Alpha V brackets are available in 12 sizes to accommodate depths of 1.38” to 10.04”.  Alpha H brackets are available in 8 sizes to accommodate depths of 1.38” to 9.25”. Sigma U brackets are available in 11 sizes to accommodate 2.50" - 13.75". 

Engineered System

ECO Cladding is committed to providing a fully engineered system (both C.I. Subframing and Panel Subframing) in which the entire wall is engineered to accommodate project wind loads, seismic loads, building slab-to-slab deflections, and thermal movements of materials.

Cost Effective

Fewer Holes in Air Vapor Barrier

ECO Cladding wall brackets maximize the distance between attachment points on the walls, creating fewer penetrations through the continuous insulation (c.i.) plane and into the weather-protective membrane, thereby reducing air and water leakage opportunities. In addition, our wall brackets are detailed to create a seal between the bracket and membrane. 

The Cost-Effective SubFraming!

ECO wall brackets are easy to install and are more cost-effective in labor man-hours, allowing materials to be rapidly set even when backup walls are not plumb or true. Since our wall brackets have better-spanning distances than competitors, labor time can be cut in half.

In Stock / Short Lead Times!

Time is money.  ECO Cladding stocks our wall brackets, profiles, and accessories ready to ship for your project.  Our in-house technical team can get your project moving forward quickly.

25 Years of Rainscreen Experience

The team at ECO Cladding has over 25 years of USA-based technical expertise, industry relationships, and real-life experience.  With the completion of hundreds of rainscreen installations across the USA, and with a variety of products, we are here to serve you. 

Build Your Project

Take the guesswork regarding system selection and design by submitting your project to us for a technical review.

Start Now