TWPro MB - Storm Collar - Ø 100
At a Glance
- - Premium 304 & 316 grade stainless steel construction
- - Fully welded design for enhanced durability
- - Compressed rockwool insulation for superior thermal efficiency
- - HETAS approved and CE marked for guaranteed safety
- - Engineered to provide ultimate water tightness for roof penetrations

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 MB Storm Collar Ø 100 is designed for ultimate water tightness in chimney flues, especially where they pass through the roof. Suitable for a range of appliances including woodstoves, gas fires, and oil boilers, this versatile collar protects against extreme weather conditions. Constructed with 304 grade stainless steel for the outer skin and 316 grade stainless steel for the inner skin, both layers boast a 0.4mm thickness ensuring durability and longevity.
The insulation consists of compressed rockwool with densities of 200kg/m³ and 128kg/m³ respectively, offering excellent thermal efficiency. All components are fully welded to provide robust construction. The product holds HETAS approval and CE marking, meeting all safety and performance standards.
For best installation results, secure the storm collar about 25mm above the flashing’s highest point and seal with silicone to ensure complete water tightness.
SKU: 58-100-082
Technical Specifications | |
---|---|
Diameter | u00d8 100 mm |
Outer Material | 304 grade stainless steel |
Inner Material | 316 grade stainless steel |
Skin Thickness | 0.4 mm each layer |
Insulation | Compressed rockwool (densities: 200kg/mu00b3 & 128kg/mu00b3) |
Approvals | HETAS approved, CE marked |
Installation Recommendation | Secure approximately 25mm above flashing; apply silicone sealant along the top edge |
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.
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National Flues Ltd Verdict
The TWPro MB Storm Collar Ø 100 is a top-tier product that ensures excellent water tightness for your chimney flue. With reliable nationwide delivery and unbeatable prices, National Flues is your go-to supplier for both retail and trade customers.
The TWPro MB Storm Collar Ø 100 is designed to ensure water tightness where a chimney flue passes through the roof, providing protection against weather conditions.
National Flues supplies high-quality fireplaces and flues to both retail and trade customers nationwide. We pride ourselves on unbeatable prices and reliable delivery, ensuring secure online payments for retail customers and offering trade accounts for businesses.
