An Adjustable Base Support is designed to significantly improve the strength of a flue system and is recommended for any long external Twin Wall run. Positioned at the base of the flue, this part creates a secure anchor point and can support up to 20m of flue. Shieldmaster Twin Wall is compatible for use with all solid fuels as well as gas and oil appliances and has a safe distance to combustibles of 50mm. It is also available powder coated to black.
Shieldmaster does not need any additional silicone or sealants to seal the joints. It has a unique push-fit locking system to make connecting and disconnecting really simple.
Important Information
All twin wall flue parts are measured by their internal diameter. Due to the insulated construction, the external diameter will be approximately 2 inches larger than the stated size.
Technical Guidance
For help with installation requirements and compliance, please see our Technical Information section, which includes easy-to-understand guides covering Building Regulations for stove and flue installations.
For more information about twin wall flue installations, see our guide.










Sheryl Cookson –
Arrived intact but very scratched. Additional packaging advisable due to the delicateness of flues.