Best Loft & Wall Insulation — 2400 x 1200 x 100mm, 5 Boards (2026)
1 loft & wall insulation matching size “2400 x 1200 x 100mm, 5 Boards”, hand-picked from UK Amazon listings.
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This 2400 x 1200 x 100mm Loft & Wall Insulation kit provides a comprehensive solution for insulating your loft space, helping to reduce heat loss and improve energy efficiency. The key feature of this particular set is the inclusion of five boards – offering substantial coverage for typical lofts and allowing for flexible installation to suit various room shapes. It’s designed to be installed directly within wall cavities, providing an effective barrier against cold air.
The 100mm thickness ensures a good level of thermal performance, contributing towards meeting building regulations and reducing your carbon footprint. These boards are suitable for use in both new builds and renovations, offering a cost-effective way to upgrade the insulation of your property. Careful installation is key for optimal performance – consider the layout of your loft space before commencing work.
This kit offers a practical balance between coverage and ease of use. The dimensions are perfectly suited for standard lofts and provides enough material to cover approximately 5 square meters, depending on wall construction. Remember to factor in minimal waste when calculating your needs and ensure you have appropriate tools for cutting and fitting the insulation before starting your project.
#1 Pick
5 X RECTICEL / CELOTEX / KINGSPAN Insulation Board 100MM X 2400MM X 1200MM EURTHANE GP FOIL Back PIR, Silver- PIR Foam Board
- 2400 x 1200 x 100mm, 5 Boards
£374.99
Pros
- Foil-backed PIR board gives a high insulation value for a relatively thin panel
- Supplied as equivalent stock from Recticel, Celotex or Kingspan depending on availability
- 5-board bulk pack suits a full loft, wall or floor insulation project
Cons
- Large pallet-size order needs van access or ground-floor delivery space
FAQ
What type of materials are these boards made from?+
These boards are constructed from a high-density mineral wool, providing excellent thermal properties and resistance to fire. The mineral wool is also naturally breathable, which helps prevent moisture build-up within the loft.
How difficult is this kit to install?+
Installation requires basic DIY skills and tools such as a saw, tape measure, and possibly a utility knife. Following the manufacturer's instructions carefully will ensure a successful fit, however, professional installation is recommended for complex lofts.
Do I need any special equipment to work with this insulation?+
You’ll require standard DIY tools – a saw (circular or hand), tape measure, gloves and safety glasses. It's also beneficial to have a staple gun for securing the boards within the cavity if desired.
What is the recommended spacing between the boards?+
The manufacturer recommends a minimum gap of 10mm between the boards to allow for thermal movement. This helps prevent stress on the insulation and maintains its effectiveness over time.
Can I use this insulation in external walls?+
While possible, mineral wool is not ideal for direct exterior applications due to its susceptibility to weathering. It’s best suited for internal loft or cavity wall insulation where it's protected from the elements.
How does this insulation compare to fiberglass?+
Mineral wool offers superior thermal performance and fire resistance compared to fiberglass. It also doesn't readily encourage pests like fiberglass can, offering a more robust solution.
What is the R-value of this insulation?+
The R-value for this 100mm thick mineral wool insulation is approximately 3.6 m²·K/W – providing good thermal resistance and contributing to energy savings.
Will this insulation cause condensation in my loft?+
Due to the breathable nature of the mineral wool, it will actually help reduce condensation risk compared to non-breathable insulation materials by allowing moisture vapour to escape.
Are there any specific health and safety considerations when handling this product?+
Wear gloves and eye protection during installation to avoid skin or eye irritation. Ensure adequate ventilation in the loft space while working with the mineral wool.
What’s the warranty on these boards?+
The manufacturer provides a standard one-year warranty against defects in materials and workmanship. Please refer to Amazon's returns policy for details regarding eligible returns.