Joist Support - Ø 175
At a Glance
- - Robust stainless steel construction (304 outer, 316 inner - both 0.40mm thick)
- - Designed for secure chimney support through floor joists
- - High-density compressed rockwool insulation for excellent thermal protection
- - Compatible with wood, oil, gas and low sulphur coal appliances
- - HETAS and CE approved for safety and quality assurance
- - Locking Band system ensures a secure, easy installation
- - Maintains required distances from combustibles: 50mm (TWPro) and 60mm (KC)
- - Supports a maximum load span of 3 metres

Please Note: All dimensions refer to the internal diameter of flues. If unsure, please call 01670 206999 to ensure you choose the correct products.
We Won't Be Beaten On Price
At National Flues, we continuously monitor competitor prices. This ensures that we consistently offer you the best deals on all our products. Here’s how we keep your costs low:
- Daily Price Matching: Our team adjusts prices to ensure we stay competitive.
- Bulk Purchasing Power: We sell a lot, so we can negotiate better rates with suppliers, passing the savings directly to you.
- Operational Efficiency: We have streamlined processes to reduce overhead.
Price Match Guarantee: If you find the same product cheaper within 48 hours, we’ll match it and refund the difference.
Free Delivery Over £100: Orders over £100 are free delivery (call us if delivery is required outside the mainland UK).
“I saved 20% on my purchase compared to other retailers. Exceptional service!” – Jane D.
Have Questions?
Phone: 01670 206999
Email: [email protected]
- Info
- Specs
- Install
- FAQs
The Joist Support - Ø 175 is designed specifically for the secure passage of chimneys through floor joists, ensuring optimal safety and stability. Perfect for a variety of appliances including woodstoves, gas coal effect fires, and oil & gas boilers, this support features high-quality construction with both inner and outer skins made of robust stainless steel – 304 grade for the outer skin and 316 grade for the inner skin, both at 0.4mm thickness. The insulation consists of high-density compressed rockwool, providing an impressive thermal barrier.
Designed to keep your installation safe, the required distance to combustibles is 50mm for TWPro and 60mm for KC. Moreover, this product holds both HETAS and CE approvals, securing its place as a trusted component in any chimney system. Installation is simple with the use of a Locking Band which joins the TWPro Twin Wall Insulated Chimney parts together securely.
Be sure to maintain adequate spacing from combustible materials during the installation process.
SKU: 15-175-068
Technical Specifications | |
---|---|
SKU | 15-175-068 |
Item | Joist Support - u00d8 175 |
Designation | EN1856-1 T600 N1 W V2 L50040 TWPro G50/ KC G60 |
System | TWPro / KC |
Inner Material | 316L Stainless Steel (0.40mm) |
Outer Material | 304 Stainless Steel (0.40mm) |
Insulation | High-density compressed rockwool |
Fuels | Wood, Oil, Gas, Low sulphur coal |
Approvals | HETAS / CE |
Distance To Combustibles | TWPro 50mm / KC 60mm |
Maximum Load Support Distance | 3 metres |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Friday, April 4th. If you need faster stove or fireplace delivery please give us a call. We can often reduce longer lead times if we pay the carrier £25 for express delivery. Visit our Shipping Information page for more information.
Warranty & Returns +
All our products come with warranties. Mi-Flex offers a lifetime guarantee. Returns for damaged items are covered by insurance; non-damaged returns incur return delivery costs.
Price Match Guarantee +
We will match any price like for like. If you find it cheaper within 48 hours, we'll refund the difference.
Compatible and other products that may be of interest...
National Flues Ltd Verdict
At National Flues, we believe the Joist Support - Ø 175 is the ultimate choice for securing your chimney through floor joists. With its CE marking and HETAS approval, it's an industry favourite. We rarely get beaten on price and offer reliable nationwide delivery for both retail and trade customers.
The Joist Support - Ø 175 is designed to securely support chimneys as they pass through floor joists, ensuring even weight distribution and safety for various heating appliances.
National Flues is a trusted UK supplier of high-quality fireplace and flue products, delivering reliable solutions for both retail and trade customers nationwide. Known for our competitive pricing and dependable delivery services, National Flues is dedicated to supporting safe and efficient chimney installations.
