About us
National Insulation Supplies is a leading provider of high-quality insulation solutions, proudly serving both trade professionals and DIY enthusiasts across the UK. With over 50 years of family-owned expertise under our belt, we’ve built a reputation as a trusted name in the industry.
Our mission is simple: to deliver premium insulation products with exceptional service and support.
We’re more than just a supplier
Collaborating with some of the industry's top manufacturers, we bring you market-leading brands like Kingspan, Celotex, Rockwool, Knauf, and more. Our comprehensive product range includes PIR boards, EPS insulation boards, loft rolls, acoustic insulation, and underfloor heating boards, ensuring we can meet every insulation need. With competitive pricing, fast nationwide delivery, and expert guidance from our knowledgeable team, we make the process seamless and stress-free.
Let customers speak for us
Excellent quality
Bought this instead of the Kingspan and was not disappointed. Easy to work with and a great price
John Morris
Recticel General Purpose Insulation Board - 2400mm x 1200mm - All Thicknesses
Good
Great speedy delivery. Would use the service again
Madalin Ailincai
Celotex PIR Insulation Board - 2400mm x 1200mm - All Thicknesses
Highly recommended
Pure pleasure to deal with.
Delivery was smooth.
Will use NIS again.
Daniel Howells
Recticel General Purpose Insulation Board - 2400mm x 1200mm - All Thicknesses
Very good servis and price
derek wheatley derek wheatley
Celotex PIR Insulation Board - 2400mm x 1200mm - All Thicknesses
Very efficient. Ordered and Delivery within a couple of days. Would recommend
Sandra Bennett
Celotex PIR Insulation Board - 2400mm x 1200mm - All Thicknesses
excellent price fast delivery what more is there
excellent price fast delivery what more is there to say a perfect site for all my needs
Mark Rydqvist
Rockwool RWA45 Slab - 1200mm x 600mm - All Thicknesses
Recital 50mm PIR insulation board.
It is what it is. Other brand's available that do the same thing. Don't really notice the brand .
K.C.
Recticel General Purpose Insulation Board - 2400mm x 1200mm - All Thicknesses
Quick and good price
William Palmer
Celotex PIR Insulation Board - 2400mm x 1200mm - All Thicknesses
Great materials & customer service
Great materials and customer service.. web site user friendly and very informative
stephen konner
Celotex PIR Insulation Board - 2400mm x 1200mm - All Thicknesses
Excellent product
Excellent product easily cut to get a good finish. Very high thermal value.
Ben David
Celotex PIR Insulation Board - 2400mm x 1200mm - All Thicknesses
Tajmeel clinic Ltd , Hair transplant and aesthetics clinic
Very good insulation, arrived on time , easy to install.
Mohamad Khalil
Rockwool RWA45 Slab - 1200mm x 600mm - All Thicknesses
Fast delivery super customer service
Delivered when said and excellent quality. Delivery Driver was very helpful.
Laurie Steabler
Recticel General Purpose Insulation Board - 2400mm x 1200mm - All Thicknesses
Insulation
Came quickly and best price I could find, can’t be faulted in my experience.
Karl Harper
Recticel General Purpose Insulation Board - 2400mm x 1200mm - All Thicknesses
Excellent Support
The support provided by National Insulation Supplies was excellent, where that spent time to confirm local availability, with delivery being made in less than 48hrs. The material itself is easy to cut (with a wood saw), and very simple to install.
Nick Bradbury
Rockwool RWA45 Slab - 1200mm x 600mm - All Thicknesses
Cathy
Great service from order to delivery.
Had a few questions which were answered immediately. Great company & really competitive prices.
Cathy Mitchell
Celotex PIR Insulation Board - 2400mm x 1200mm - All Thicknesses
2 months ago
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Excellent experience all round, competitive prices and a really good approach to customer satisfaction, they delivered within 4 days of placing the order and that was a day earlier than expected. I originally went with them because they don’t charge for delivery, (subject to a minimum order value), so even though they may not be the cheapest for the insulation boards they are still very competitive overall. The delivery driver was very helpful too, he dropped the pallet by forklift just where I wanted it! Top marks from me.
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2 months ago
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Prompt delivery, friendly driver, accommodating for where item to be stored, thank you
2 months ago
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A great product at a really good price it was only a small order but it was not a problem for this company neither was delivery a full day early fantastic we will definitely use them again thank you for a great price and service 😀
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2 months ago
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Goods nicely packaged and no nonsense delivery. Even though the delivery driver couldn't get an artic up our road he delivered the pallet with a forklift and placed it on our lawn.
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4 weeks ago
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Quick delivery quality products at a good price. Excellent delivery and top service assured
2 months ago
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Excellent! Brilliant prices, very prompt delivery, communication and support outstanding. Highly recommend.
2 months ago
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Decent prices and fast delivery. Recommended, and will use again.
a month ago
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Very good service. Quick delivery , highly recommend
3 months ago
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Purchased 30mm Recticel insulation for my garage door.
Worked great.
Insulation was delivered in good condition, Very happy.
3 weeks ago
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Excellent customer service, fast delivery and quality products
2 months ago
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Excellent experience all round, competitive prices and a really good approach to customer satisfaction, they delivered within 4 days of placing the order and that was a day earlier than expected. I originally went with them because they don’t charge for delivery, (subject to a minimum order value), so even though they may not be the cheapest for the insulation boards they are still very competitive overall. The delivery driver was very helpful too, he dropped the pallet by forklift just where I wanted it! Top marks from me.
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2 months ago
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Prompt delivery, friendly driver, accommodating for where item to be stored, thank you
2 months ago
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A great product at a really good price it was only a small order but it was not a problem for this company neither was delivery a full day early fantastic we will definitely use them again thank you for a great price and service 😀
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2 months ago
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Goods nicely packaged and no nonsense delivery. Even though the delivery driver couldn't get an artic up our road he delivered the pallet with a forklift and placed it on our lawn.
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4 weeks ago
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Quick delivery quality products at a good price. Excellent delivery and top service assured
2 months ago
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Excellent! Brilliant prices, very prompt delivery, communication and support outstanding. Highly recommend.
2 months ago
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Decent prices and fast delivery. Recommended, and will use again.
a month ago
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Very good service. Quick delivery , highly recommend
3 months ago
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Purchased 30mm Recticel insulation for my garage door.
Worked great.
Insulation was delivered in good condition, Very happy.
3 weeks ago
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Excellent customer service, fast delivery and quality products
6 months ago
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Really impressed with these guys! The new website is really easy to use and find exactly what you need. Spoke to Mitchell and he was friendly and a great help. Delivery was very quick. They're a really good bunch of people. Will definitely be using again.
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3 months ago
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Excellent service, from speaking to the sales people to see when my delivery was due to it been delivered. Highly recommended
3 months ago
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The insulation board from National Insulation Supplies is approx one third of the price of buying at diy stores. Was able to get it delivered even though it was a relatively small order (£168). Several suppliers have a minimum order for delivery much higher than that.
Delivery was prompt and driver helped me carry it down the drive to the garage. Happy customer, thanks.
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3 months ago
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Amazing service from the guys at NIS, ordered 36 8x4 sheets on Monday morning and delivered on Wednesday morning in the middle of December in a semi rural area. Helped make our new home warm for Christmas. Thank you all from the Fantom Menaces
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3 months ago
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Delivery was on time, and the driver was very helpful. All in all, a very good transaction wouldn't hesitate to use again
2 months ago
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These guys care supurb service from start to finish delivery was spoton didn't realize he couldn't get so the guy got it on the forks and brought it half a mile they deserve the five stars will use them again
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2 months ago
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Very happy with quality price and delivery timescale. Will be using again!
2 months ago
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Thanks again for the delivery. I also want to particularly thank the driver who went out of his way to deliver the insulation boards using his forklift, right to my door, despite the snow and icy conditions!
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3 months ago
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Goods received as ordered with no damage and on time, I would recommend this company.
6 months ago
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Really impressed with these guys! The new website is really easy to use and find exactly what you need. Spoke to Mitchell and he was friendly and a great help. Delivery was very quick. They're a really good bunch of people. Will definitely be using again.
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3 months ago
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Excellent service, from speaking to the sales people to see when my delivery was due to it been delivered. Highly recommended
3 months ago
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The insulation board from National Insulation Supplies is approx one third of the price of buying at diy stores. Was able to get it delivered even though it was a relatively small order (£168). Several suppliers have a minimum order for delivery much higher than that.
Delivery was prompt and driver helped me carry it down the drive to the garage. Happy customer, thanks.
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3 months ago
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Amazing service from the guys at NIS, ordered 36 8x4 sheets on Monday morning and delivered on Wednesday morning in the middle of December in a semi rural area. Helped make our new home warm for Christmas. Thank you all from the Fantom Menaces
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3 months ago
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Delivery was on time, and the driver was very helpful. All in all, a very good transaction wouldn't hesitate to use again
2 months ago
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These guys care supurb service from start to finish delivery was spoton didn't realize he couldn't get so the guy got it on the forks and brought it half a mile they deserve the five stars will use them again
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2 months ago
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Very happy with quality price and delivery timescale. Will be using again!
2 months ago
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Thanks again for the delivery. I also want to particularly thank the driver who went out of his way to deliver the insulation boards using his forklift, right to my door, despite the snow and icy conditions!
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3 months ago
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Goods received as ordered with no damage and on time, I would recommend this company.