Best Insulation Board 50mm of 2025

Last updated on 17/10/2025
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Most Relevant
Most Relevant
Best Choice
1
2400 x 1200 x 50mm Celotex GA4050 / Kingspan TP10 / TF70 / Ecotherm Ecoversal Foil Insulation (10)
2400 x 1200 x 50mm Celotex GA4050 / Kingspan TP10 / TF70 / Ecotherm Ecoversal Foil Insulation (10)
buildershop (uk) ltd
Why we love it
  • Versatile for roofs, floors, walls.
  • Delivery available for remote locations.
  • Quality assured, trusted brands supplied.
Show More
9.7
Exceptional
9.7
Exceptional
buildershop (uk) ltd
2400 x 1200 x 50mm Celotex GA4050 / Kingspan TP10 / TF70 / Ecotherm Ecoversal Foil Insulation (10)
Why we love it
  • Versatile for roofs, floors, walls.
  • Delivery available for remote locations.
  • Quality assured, trusted brands supplied.
Show More
Value for Money
2
2400mm x 1200mm x 50mm Celotex GA4050 / Kingspan TP10 / TF70 / Ecotherm Ecoversal Foil Insulation (8)
2400mm x 1200mm x 50mm Celotex GA4050 / Kingspan TP10 / TF70 / Ecotherm Ecoversal Foil Insulation (8)
Generic
Why we love it
  • Superior insulation for diverse areas.
  • Potential for direct equivalent delivery.
  • Promotes energy efficiency and comfort.
Main Highlights
  • 8 x 50mm x 2400mm x 1200mm Celotex Insulation Boards
  • Please note in certain areas you may receive a direct equivalent.
Show More
9.6
Superb
9.6
Superb
Generic
2400mm x 1200mm x 50mm Celotex GA4050 / Kingspan TP10 / TF70 / Ecotherm Ecoversal Foil Insulation (8)
Why we love it
  • Superior insulation for diverse areas.
  • Potential for direct equivalent delivery.
  • Promotes energy efficiency and comfort.
Main Highlights
  • 8 x 50mm x 2400mm x 1200mm Celotex Insulation Boards
  • Please note in certain areas you may receive a direct equivalent.
Show More
3
2400mm x 1200mm x 50mm Celotex GA4050 / Kingspan TP10 / TF70 / Ecotherm Ecoversal Foil Insulation (7)
2400mm x 1200mm x 50mm Celotex GA4050 / Kingspan TP10 / TF70 / Ecotherm Ecoversal Foil Insulation (7)
Generic
Why we love it
  • Efficient temperature control feature.
  • Broad coverage area.
  • Top-quality material used.
Main Highlights
  • 7 x 50mm x 2400mm x 1200mm Celotex Insulation Boards
  • Please note in certain areas you may receive a direct equivalent.
Show More
9.4
Superb
9.4
Superb
Generic
2400mm x 1200mm x 50mm Celotex GA4050 / Kingspan TP10 / TF70 / Ecotherm Ecoversal Foil Insulation (7)
Why we love it
  • Efficient temperature control feature.
  • Broad coverage area.
  • Top-quality material used.
Main Highlights
  • 7 x 50mm x 2400mm x 1200mm Celotex Insulation Boards
  • Please note in certain areas you may receive a direct equivalent.
Show More
4
2400 x 1200 x 50mm Celotex GA4050 / Kingspan TP10 / TF70 / Ecotherm Ecoversal Foil Insulation (6)
2400 x 1200 x 50mm Celotex GA4050 / Kingspan TP10 / TF70 / Ecotherm Ecoversal Foil Insulation (6)
Generic
Why we love it
  • Optimizes thermal efficiency.
  • Easy application process.
  • Ensures long-term durability.
Main Highlights
  • 6 x 50mm x 2400mm x 1200mm Celotex Insulation Boards
Show More
9.4
Superb
9.4
Superb
Generic
2400 x 1200 x 50mm Celotex GA4050 / Kingspan TP10 / TF70 / Ecotherm Ecoversal Foil Insulation (6)
Why we love it
  • Optimizes thermal efficiency.
  • Easy application process.
  • Ensures long-term durability.
Main Highlights
  • 6 x 50mm x 2400mm x 1200mm Celotex Insulation Boards
Show More
5
2400 x 1200 x 50mm Celotex GA4050 / Kingspan TP10 / TF70 / Ecotherm Ecoversal Foil Insulation (4)
2400 x 1200 x 50mm Celotex GA4050 / Kingspan TP10 / TF70 / Ecotherm Ecoversal Foil Insulation (4)
Generic
Why we love it
  • Efficient, high-performance insulation boards.
  • Flexibility in application areas.
  • Equivalent options available.
Main Highlights
  • 4 x 50mm x 2400mm x 1200mm Celotex Insulation Boards
  • Please note in certain areas you may receive a direct equivalent.
Show More
9.3
Superb
9.3
Superb
Generic
2400 x 1200 x 50mm Celotex GA4050 / Kingspan TP10 / TF70 / Ecotherm Ecoversal Foil Insulation (4)
Why we love it
  • Efficient, high-performance insulation boards.
  • Flexibility in application areas.
  • Equivalent options available.
Main Highlights
  • 4 x 50mm x 2400mm x 1200mm Celotex Insulation Boards
  • Please note in certain areas you may receive a direct equivalent.
Show More
6
2400 x 1200 x 50mm Celotex GA4050 / Kingspan TP10 / TF70 / Ecotherm Ecoversal Foil Insulation (5)
2400 x 1200 x 50mm Celotex GA4050 / Kingspan TP10 / TF70 / Ecotherm Ecoversal Foil Insulation (5)
Generic
Why we love it
  • Superior thermal performance guaranteed.
  • Helpful in diverse geographic areas.
  • Convenient dimensions for easy installation.
Main Highlights
  • 5 x 50mm x 2400mm x 1200mm Celotex Insulation Boards
  • Please note in certain areas you may receive a direct equivalent.
Show More
9.2
Superb
9.2
Superb
Generic
2400 x 1200 x 50mm Celotex GA4050 / Kingspan TP10 / TF70 / Ecotherm Ecoversal Foil Insulation (5)
Why we love it
  • Superior thermal performance guaranteed.
  • Helpful in diverse geographic areas.
  • Convenient dimensions for easy installation.
Main Highlights
  • 5 x 50mm x 2400mm x 1200mm Celotex Insulation Boards
  • Please note in certain areas you may receive a direct equivalent.
Show More
7
Triplast Expanded Polystyrene Foam Sheets EPS 70 (6 Sheets, 2400 x 1200 x 50mm Each) - BBA Certified Wall & Floor Insulation Board - Box Lining & Packaging Foam Board - White Blocks for DIY Projects
Triplast Expanded Polystyrene Foam Sheets EPS 70 (6 Sheets, 2400 x 1200 x 50mm Each) - BBA Certified Wall & Floor Insulation Board - Box Lining & Packaging Foam Board - White Blocks for DIY Projects
Triplast
Why we love it
  • Energy-efficient thermal insulation foam.
  • Shock-proof protective packaging foam.
  • Perfect for arts & craft.
Main Highlights
  • CONTENTS: 6 x Polystyrene Sheets | SIZE: Each square-edged sheet measures 2400mm (Length) x 1200mm (Width) x 50mm (Height) | TYPE: EPS 70 | THERMAL CONDUCTIVITY: Low (0.038 - 0.030 W/mK) | BBA CERTIFIED for BS EN 13163:2012 | MADE in UK
  • USE #1 - INSULATION BOARD: Energy-efficient, damp-proof & odourless insulation foam for thermal insulation. Use for wall & floor insulation, shed insulation or as polystyrene ceiling tiles - these are BBA certified construction boards!
  • USE #2 - PROTECTIVE PACKAGING: Shock-proof, impact-resistant & lightweight packing foam sheet for cushioning fragile items, box lining or interleaving flat items (e.g. glass panels) - prevent damage & keep items in place during shipping & storage!
  • USE #3 - ARTS & CRAFT: Non-toxic & non-irritant, these white polystyrene sheet are perfect for 3D model making, sculpting, floral arrangements, diorama, DIY hobby & school projects - cut, carve, sand, glue & paint this foam block with ease!
  • AN ECO-CONSCIOUS CHOICE: Made with no HCF's, CFC's or HCFC's, these EPS foam sheets have a zero Global Warming Potential (GWP) & low O-Zone Depletion Potential (ODP) - go sustainable with our BRE Green Guide A+ Rating certified expanded foam boards!
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9.1
Superb
9.1
Superb
Triplast
Triplast Expanded Polystyrene Foam Sheets EPS 70 (6 Sheets, 2400 x 1200 x 50mm Each) - BBA Certified Wall & Floor Insulation Board - Box Lining & Packaging Foam Board - White Blocks for DIY Projects
Why we love it
  • Energy-efficient thermal insulation foam.
  • Shock-proof protective packaging foam.
  • Perfect for arts & craft.
Main Highlights
  • CONTENTS: 6 x Polystyrene Sheets | SIZE: Each square-edged sheet measures 2400mm (Length) x 1200mm (Width) x 50mm (Height) | TYPE: EPS 70 | THERMAL CONDUCTIVITY: Low (0.038 - 0.030 W/mK) | BBA CERTIFIED for BS EN 13163:2012 | MADE in UK
  • USE #1 - INSULATION BOARD: Energy-efficient, damp-proof & odourless insulation foam for thermal insulation. Use for wall & floor insulation, shed insulation or as polystyrene ceiling tiles - these are BBA certified construction boards!
  • USE #2 - PROTECTIVE PACKAGING: Shock-proof, impact-resistant & lightweight packing foam sheet for cushioning fragile items, box lining or interleaving flat items (e.g. glass panels) - prevent damage & keep items in place during shipping & storage!
  • USE #3 - ARTS & CRAFT: Non-toxic & non-irritant, these white polystyrene sheet are perfect for 3D model making, sculpting, floral arrangements, diorama, DIY hobby & school projects - cut, carve, sand, glue & paint this foam block with ease!
  • AN ECO-CONSCIOUS CHOICE: Made with no HCF's, CFC's or HCFC's, these EPS foam sheets have a zero Global Warming Potential (GWP) & low O-Zone Depletion Potential (ODP) - go sustainable with our BRE Green Guide A+ Rating certified expanded foam boards!
Show More
8
50mm PIR Insulation Board, 600mm x 1200mm, Pack of 4
50mm PIR Insulation Board, 600mm x 1200mm, Pack of 4
Generic
Why we love it
  • Reduces energy costs significantly.
  • Easy installation and handling.
  • Superior moisture resistance.
Main Highlights
  • Rigid Insulation: This 50mm PIR insulation board provides excellent thermal insulation properties to help reduce energy costs.
  • Versatile Application: Suitable for use in floors, walls, and roofs in new-build and renovation projects.
  • Easy Installation: Lightweight yet sturdy boards measure 600mm x 1200mm for convenient handling and installation.
  • Moisture Resistant: The closed-cell structure resists moisture ingress, ensuring long-lasting performance.
  • Pack Contents: Each pack contains 4 insulation boards, covering an area of 2.88m2
Show More
8.9
Excellent
8.9
Excellent
Generic
50mm PIR Insulation Board, 600mm x 1200mm, Pack of 4
Why we love it
  • Reduces energy costs significantly.
  • Easy installation and handling.
  • Superior moisture resistance.
Main Highlights
  • Rigid Insulation: This 50mm PIR insulation board provides excellent thermal insulation properties to help reduce energy costs.
  • Versatile Application: Suitable for use in floors, walls, and roofs in new-build and renovation projects.
  • Easy Installation: Lightweight yet sturdy boards measure 600mm x 1200mm for convenient handling and installation.
  • Moisture Resistant: The closed-cell structure resists moisture ingress, ensuring long-lasting performance.
  • Pack Contents: Each pack contains 4 insulation boards, covering an area of 2.88m2
Show More
9
50mm PIR Insulation Board, 400mm x 1200mm, Pack of 6
50mm PIR Insulation Board, 400mm x 1200mm, Pack of 6
Generic
Why we love it
  • Excellent thermal insulation properties.
  • Suitable for multiple applications.
  • Lightweight, easy to install.
Main Highlights
  • Rigid Insulation: This 50mm PIR insulation board provides excellent thermal insulation properties to help reduce energy costs.
  • Versatile Application: Suitable for use in floors, walls, and roofs in new-build and renovation projects.
  • Easy Installation: Lightweight yet sturdy boards measure 400mm x 1200mm for convenient handling and installation.
  • Moisture Resistant: The closed-cell structure resists moisture ingress, ensuring long-lasting performance.
  • Pack Contents: Each pack contains 6 insulation boards, covering an area of 2.88m2
Show More
8.7
Excellent
8.7
Excellent
Generic
50mm PIR Insulation Board, 400mm x 1200mm, Pack of 6
Why we love it
  • Excellent thermal insulation properties.
  • Suitable for multiple applications.
  • Lightweight, easy to install.
Main Highlights
  • Rigid Insulation: This 50mm PIR insulation board provides excellent thermal insulation properties to help reduce energy costs.
  • Versatile Application: Suitable for use in floors, walls, and roofs in new-build and renovation projects.
  • Easy Installation: Lightweight yet sturdy boards measure 400mm x 1200mm for convenient handling and installation.
  • Moisture Resistant: The closed-cell structure resists moisture ingress, ensuring long-lasting performance.
  • Pack Contents: Each pack contains 6 insulation boards, covering an area of 2.88m2
Show More
10
Kingspan Thermawall Multi Purpose Insulation Boards 50mm x 450mm x 1200mm Floor Wall Roof & Underfloor (4)
Kingspan Thermawall Multi Purpose Insulation Boards 50mm x 450mm x 1200mm Floor Wall Roof & Underfloor (4)
LOWENERGIE
Why we love it
  • High performance thermal insulation.
  • Moisture resistant design.
  • Lightweight and easy to install.
Main Highlights
  • High performance thermoset polyisocyanurate (PIR) insulation - thermal conductivity 0.022 W/mK
  • Clear cavity is maintained - resists moisture penetration
  • Low emissivity foil facings significantly increase the thermal resistance of the cavity
  • Lightweight insulation that is easy to cut, handle and install compared to some other commonly used insulants
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8.7
Excellent
8.7
Excellent
LOWENERGIE
Kingspan Thermawall Multi Purpose Insulation Boards 50mm x 450mm x 1200mm Floor Wall Roof & Underfloor (4)
Why we love it
  • High performance thermal insulation.
  • Moisture resistant design.
  • Lightweight and easy to install.
Main Highlights
  • High performance thermoset polyisocyanurate (PIR) insulation - thermal conductivity 0.022 W/mK
  • Clear cavity is maintained - resists moisture penetration
  • Low emissivity foil facings significantly increase the thermal resistance of the cavity
  • Lightweight insulation that is easy to cut, handle and install compared to some other commonly used insulants
Show More