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Top Insulation Solutions for Fireplaces and Flues in the UK

When it comes to keeping your fireplace and flues functioning efficiently, proper insulation is key. Our MI-Flex, 316L Mi-FLEX, 250MM (10 INCH) insulation products are designed to provide superior performance, ensuring optimal heat retention and preventing heat loss. With our insulation solutions, you can enhance the overall energy efficiency of your heating system while maintaining a comfortable and safe indoor environment.

Shop By Department

StovesPremium Stoves
FireplacesStunning Fireplaces
MI-FlexFlexible Liner
Chimney FlueChimney Flue
Connecting PipesConnecting Pipes
Fans Flashings CowlsFans Flashings Cowls
Installation PartsInstallation Parts
After Care PartsAfter Care Parts

The best selling flue liner in the UK. Suitable for gas, oil, and approved solid fuels. Call our advisers on 01670 206 999 if you need any help choosing.

£26.99

90-LECA

Leca 50L Bag

Leca 50L Bag

£33.99

90-VERM

Vermiculite (100L Bag)

Vermiculite (100L Bag)

Your Insulation Questions Answered

Why is insulation important for fireplaces and flues? -

Insulation plays a crucial role in maintaining heat within the fireplace and flue system, ensuring efficient operation and preventing heat loss.

What are the key benefits of using MI-Flex insulation products? +

How can proper insulation improve the energy efficiency of my fireplace? +

Are MI-Flex insulation products suitable for all types of fireplaces? +

Do insulated flues contribute to a safer indoor environment? +

How do I know if my fireplace needs new insulation? +

Can I install MI-Flex insulation products myself? +

Are MI-Flex insulation products environmentally friendly? +

Our insulation products are crafted using high-quality materials to deliver superior insulation properties. MI-Flex insulation is specifically designed to withstand high temperatures and resist corrosion, making it the ideal choice for fireplaces and flues. Whether you are looking to upgrade your existing insulation or install a new system, our products offer long-lasting durability and exceptional thermal efficiency. Trust our insulation solutions to enhance the performance of your fireplace and flue system, providing you with reliable warmth and comfort throughout the year.
Why Buy Insulation Products
Insulating your fireplace and flues can provide a range of benefits, including improved heat retention, reduced energy consumption, and increased safety. By effectively insulating your system, you can prevent heat loss, minimize the risk of creosote buildup, and enhance the overall efficiency of your heating setup. Our insulation products are suitable for both residential and commercial applications, offering versatile solutions for various fireplace and flue configurations. Whether you have a traditional fireplace or a modern flue system, our insulation solutions can help you achieve optimal performance and thermal comfort.

Trusted By Trade Professionals

Our Insulation products and services are trusted by hundreds of professionals nationwide. We're committed to providing quality and reliability that meets the high standards of our customers.

Dedicated Support

Experience our unparalleled customer service and support when you buy Insulation from National Flues. Our team is here to assist you every step of the way, ensuring your needs are met with expertise and care.

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