# PIR Partial Fill Cavity Board – 1200 × 450mm – Sold per Pack

Ballytherm is a strong, rigid board insulation designed for applications where high thermal performance and durability are required. Manufactured from foil-faced polyisocyanurate (PIR), it is particularly well suited to damp environments such as basements, as well as areas where enhanced flame resistance is beneficial, including separating elements between apartment units.

Produced using a continuous foaming process, Ballytherm develops a tight closed-cell structure with an inseparable bond between the foil facing and the insulation core, helping to deliver reliable long-term performance. Its rigid construction makes it suitable for walls, floors, and roofs, offering an effective solution for improving energy efficiency in both residential and commercial buildings.

## Details

- **Price:** 40.78 GBP - 61.48 GBP
- **Vendor:** UNILIN INSULATIONS UK LTD (XTRATHERM)
- **Type:** Insulation Boards
- **Tags:** Building Materials, Cavity Board, Insulation, Insulation Boards, Local

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| 50mm | 61.48 GBP | In stock |
| 75mm | 40.78 GBP | In stock |

## Images

- PIR Partial Fill Cavity Board – 1200 × 450mm – Sold per Pack

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> Source: [Carvers Building Supplies](https://www.carvers.co.uk/products/insulation-cavity-board-pir-partial-fill-50mm-x-1200-x-450mm-9-per-pk-rigid-sold-per-pack-400077506)
> Updated: 2026-06-05