TWPro GREY - Joist Support - Ø 125
At a Glance
- HETAS Approved & CE marked
- Premium 304 & 316-grade stainless steel construction
- Engineered for flawless chimney support through floor joists
- Easy locking band installation
- Maintains essential 50mm clearance from combustibles

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 TWPro GREY - Joist Support - Ø 125 is engineered for exceptional performance and durability. Ideal for use with solid fuel and gas/oil appliances such as woodstoves, gas coal effect fires, oil, and gas boilers, and various solid fuel applications. Constructed with precision, the outer skin of this joist support is made from 304-grade stainless steel at a thickness of 0.4mm, while the inner skin boasts 316-grade stainless steel, also at a thickness of 0.4mm.
The insulation comprises compressed rockwool with a density of 200kg/m3, ensuring excellent thermal resistance. Both inner and outer parts are fully welded for added integrity. Installation is straightforward, requiring just a locking band, and it's crucial to maintain a 50mm distance from any combustible materials.
Fully HETAS approved and CE marked, the TWPro Joist Support meets stringent EN1856-1 standards for safety and performance.
SKU: 56-125-068
Technical Specifications | |
---|---|
Material | Outer: 304 Stainless Steel (0.40mm), Inner: 316 Stainless Steel (0.40mm) |
Insulation | Compressed Rockwool (200kg/m3) |
Size | Ø 125 |
Approvals | HETAS Approved, CE Marked |
Standards | EN1856-1 (T600 N1 W V2 L50040 G50 and T200 W V2 L50040 020) |
Combustible Clearance | 50mm |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Thursday, April 3rd. 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.
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National Flues Ltd Verdict
The TWPro GREY Joist Support - Ø 125 is a top-quality product perfect for supporting your chimney as it passes through floor joists. Backed by HETAS approval and built from premium materials, this joist support ensures safety and reliability. With nationwide delivery and support for both retail and trade customers, National Flues is rarely beaten on price and service.
The TWPro GREY Joist Support - Ø 125 is designed to support chimneys as they pass through floor joists, ensuring even weight distribution and safe installation.
National Flues is a leading supplier of high-quality fireplaces and flues across the UK. Known for our reliable delivery, competitive pricing, and extensive support for both retail and trade customers, we ensure secure and efficient online transactions.
