Sigma Bracket - Stainless Steel

ECO Cladding' Stainless Steel Sigma Wall Bracket

Thermal bridging can be responsible for a structure’s heat loss. ECO Cladding’s Sigma stainless steel brackets have a low thermal conductivity which reduces heat loss and significantly decreases thermal bridging.

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.

Sigma brackets are designed to address the instance of thermal bridging for certain applications. Available in both vertical and horizontal designs Sigma 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 back-up wall type. Sigma+ brackets allow more fastener points and can be used in combination with standard Sigma brackets to address the cladding material’s dead load.


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!


Bracket Depth and Adjustability Chart
35mm  /  1.38”*1.46” – 2.95”YesYes
50mm  /  1.97”*2.05” – 3.54”YesYes
80mm  /  3.15”3.23” – 4.72”YesYes
100mm  /   3.94”4.02” – 5.51”YesNo
115mm  /  4.53” 4.61” – 6.10”YesYes
135mm  /  5.31”5.39” – 6.89” YesNo
150mm  /  5.91”6.77” – 8.27”YesYes
170mm  /  6.69”7.36” – 8.86”YesNo
185mm  /  7.28”7.95” – 9.45”YesYes
200mm  /  7.87” 8.74” – 10.24”YesNo
220mm  /  8.66” 8.74” – 10.24”YesYes
235mm / 9.25”9.33” – 10.83”NoYes
255mm  /  10.04”10.12” – 11.61”YesNo
260mm / 10.24"10.35” – 11.85”YesNo

Bracket Design Benefits

Fixed and Sliding Points

The Alpha bracket fixed point carries the deadloads 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 Alpha 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

Two advantages in one!  Alpha 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 a huge labor savings.

Bracket Sizes

Shallow or deep, Alpha 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”

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

Alpha 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 opportunities for air and water leakage. In addition, Alpha brackets are detailed so that they create a seal between the bracket and membrane. 

The Cost-Effective SubFraming!

Alpha 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 Alpha brackets have better spanning distances compared to competitors, labor time can be cut in half.

In Stock / Short Lead Times!

Time is money.  ECO Cladding stocks Alpha 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.

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