PIR Insulation Board - 1200 x 450 x 50 mm - 10 Pack

The R-value depends on the specific R-value calculation method and units used (e.g., imperial vs. metric). However, with a thermal conductivity (λD) of 0.022 W/(m·K), a 50mm (0.05m) board provides a thermal resistance (R-value in m²·K/W) of approximately 2.27.

While the board itself is durable and moisture-resistant, it is designed as an insulation material typically installed within building envelopes. Direct, prolonged exposure to weather elements without a protective covering is not recommended.

For applications requiring a vapor barrier, install the PIR board on the warm side of the insulation. Ensure all joints and edges are sealed with appropriate foil tape, and consider using a dedicated vapor barrier membrane if specified by building regulations for your climate.

PIR (Polyisocyanurate) foam, used in this board, generally offers higher thermal resistance per inch compared to XPS (Extruded Polystyrene) or EPS (Expanded Polystyrene). It also tends to have better fire performance characteristics than EPS and XPS.

Direct plastering onto the foil facing is generally not recommended as plaster may not adhere well. It's advisable to attach a suitable substrate, such as plasterboard or timber battens, to the foil face before plastering.

Each board measures 1200 x 450 x 50 mm (47.2" x 17.7" x 2"). The pack contains 10 boards, covering a total area of 5.4 m² (58.12 ft²).

While rigid insulation boards offer some acoustic dampening, their primary function is thermal insulation. For significant soundproofing, additional specialized acoustic materials would be necessary.

Ensure you are using a very sharp utility knife with a fresh blade or a fine-toothed saw. Make multiple shallow passes rather than trying to cut through in one go. Consider scoring the foil first before cutting the foam.

Repair any small tears in the foil with a compatible foil insulation tape to maintain the radiant barrier and air seal. For larger tears, assess if the integrity of the insulation is compromised and consider replacing the board if necessary.

This may indicate inadequate sealing of joints or potential breaches in the vapor control layer (if used). Ensure all edges and joints are properly taped and that the board is installed as part of a system designed to manage moisture.

Check for gaps between boards or around penetrations (pipes, wires). Ensure all joints are properly sealed with foil tape to create a continuous insulation layer and air barrier.