Joist Support - Ø 150
At a Glance
- - HETAS Approved and CE marked
- - Constructed from premium 304 and 316 stainless steel (0.4mm thick)
- - Robust compressed rockwool insulation (200kg/m3 for TWPro / 128kg/m3 for KC)
- - Ensures secure support for 150mm chimney flues
- - Designed for safe passage through floor joists and fire stop plate compatibility

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 150 is a crucial component for ensuring the safety and integrity of your chimney flue system. This joist support is ideal for use with solid fuel and gas/oil appliances such as woodstoves, gas coal effect fires, oil and gas boilers, and other solid fuel devices. Constructed with durability in mind, the outer skin features 304-grade stainless steel at a thickness of 0.4mm, while the inner skin is crafted from 316-grade stainless steel of the same thickness.
The insulation comprises densely packed compressed rockwool, offering superior thermal properties with a density of 200kg/m3 for TWPro and 128kg/m3 for KC. All components are fully welded to ensure robust performance. It boasts a distance to combustibles of 50mm for TWPro and 60mm for KC.
This product is HETAS Approved, CE marked, and holds designation numbers TWPro EN1856-1 T600 N1 W V2 L50040 G50 and TWPro EN1856-1 T200 W V2 L50040 O20, among others. Installation is straightforward, requiring just the use of a locking band to secure the twin wall insulated chimney parts. Ensure to maintain the stipulated distance from the flue's exterior to any combustible materials.
SKU: 15-150-068
Technical Specifications | |
---|---|
SKU | 15-150-068 |
Product Name | Joist Support - u00d8 150 |
Outer Material | 304 Stainless Steel (0.4mm thick) |
Inner Material | 316 Stainless Steel (0.4mm thick) |
Insulation | Compressed Rockwool |
Density | 200kg/m3 (TWPro) / 128kg/m3 (KC) |
Distance To Combustibles | 50mm (TWPro) / 60mm (KC) |
Designation | TWPro EN1856-1 T600 N1 W V2 L50040 G50 / T200 W V2 L50040 O20 |
Fuel Compatibility | Wood, Oil, Gas, Low Sulphur Coal |
Approvals | HETAS, CE |
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 in providing top-quality products at unbeatable prices. Our Joist Support - Ø 150 is no exception. Whether you are a retail customer or part of the trade, you can count on us for reliable nationwide delivery and secure online payments.
The Joist Support - Ø 150 is used to securely support chimney flues as they pass through floor joists, preventing any structural damage and ensuring safe operation.
National Flues is a trusted supplier of high-quality fireplaces and flues serving retail and trade customers across the UK. Known for reliable delivery and competitive pricing, we offer secure online payments and excellent customer service.
