Roof Solutions
CA Building Products offer a range of roof system solutions including the Twin-Therm® and Gemini built up trapezoidal systems and the River-Therm®, secret fix roofing solution, which is a built up system, visually similar to most standing seam systems but with a unique geometrically locked side lap connection.
Profiles are available in a range of finishes, including Corus Colorcoat HPS200® Ultra for Twin-Therm®, Corus Colorcoat LG® for Gemini and mill finish, stucco embossed and PVDF coated aluminium with River-Therm®.
A range of liner panels, structural decks and rooflight systems are available to be used in conjunction with CA Building Products Twin-Therm®, Gemini or River-Therm® roof systems.
Single skin applications are also available.
Please refer to the individual product sections for further information.
System Summary
Twin-Therm® is a complete built up trapezoidal roof cladding system. The unique core construction has been specifically designed to offer improved thermal performance and enhance site operative safety during erection and maintenance.
The Twin-Therm® roof system is also available with U-values of 0.16 and 0.20 W/m²K. Please click here to contact our Specifications Manager.
To download the Twin-Therm® 0.25 W/m²K U-value specification with a choice of 12, 25 or 40 year system guarantee, please click on the file icons to the right of this page.
A range of triple skin rooflights are also available to compliment the Twin-Therm® roof system, please click here for details.
System Summary
River-Therm® is a complete built up secret fix roof solution incorporating a unique geometrically locked side lap connection which requires no special tooling for installation.
River-Therm® is particularly suited for use on low-pitch roofs down to 1° and can also self-curve to a minimum radius of thirty metres.
The option of site-rolling is available, enabling continuous sheet lengths in excess of one hundred metres. It is also possible to eaves roll the River-Therm® system.
To download the River-Therm® 0.25 W/m²K U-value specification with a choice of 25 or 40 year system guarantee, please click on the file icons to the right of this page. The River-Therm® secret fix roofing solution is also available with U-values of 0.16 and 0.20 W/m²K.
A range of in-plane and barrel vault, triple skin rooflights are available to compliment the River-Therm® roof solution, please click here for details.
The River-Therm® system is also available in PVDF and stucco embossed aluminium finishes. Please click here to contact our Specifications Manager for details.
System Summary
Gemini is an economic built up trapezoidal roofing system designed for low maintenance and improved thermal performance.
Please click here to contact our Specifications Manager for details.
Structural Decks
Summary
CA Building Products offer a range of structural decks, to be used in conjunction with the Twin-Therm® or River-Therm® roof systems.
CA Building Products can also provide a full design service at Project design stage.
To download the structural deck specification please click on the file icon to the right of this page.
Please click here to contact our Specifications Manager for more information.
Rooflights Summary
CA Building Products offer a range of “in‐plane” rooflight designs are available, which compliment CA Building Products range of trapezoidal and secret fix roof systems.
Twin-Therm®: Summary
To download the Twin-Therm® 0.25 W/m²K U-value rooflight specification please click on the file icon below.
Rooflight Specifications for use with Twin-Therm® roof systems are also available with U-values of 0.16 and 0.20 W/m²K. Please click here to contact our Specifications Manager for details.
Twin-Therm® Rooflights are available with U-values ranging from 0.90 to 1.80 W/m²K; you can pick the U-value you require by choosing the appropriate intermediate core from within the specification document.
River-Therm®: Summary
To download the River-Therm® 0.25 W/m²K U-value rooflight specification please click on the file icon below.
The River-Therm® roof solution is also available with U-values of 0.16 and 0.20 W/m²K. Please click here to contact our Specifications Manager for details.
For in-plane rooflights where End laps are greater than 2.5°, but below 2.5° choose either the 47/1000 6IP or the RT1000 Supermax Light Rooflight. These rooflights must be continuous from ridge to eaves only. Barrel Vault rooflights are available in modules of 1m or 2m wide.
For in-plane rooflights where End laps are greater than 4.5°, choose either the 47/1000 3IP or the RT1000 Fair Rooflight. These rooflights need not be continuous from ridge to eaves.
Single Skin
Summary
Most of CA Building Products roof systems are also available in single skin applications, for use in both new build and over-cladding situations.
The single skin River-Therm® roof panel is also available in PVDF and stucco embossed aluminium finishes. Please click here to contact our Specifications Manager for details.











