Insul91 Loft Board is a high-performance insulated loft boarding system designed to improve thermal efficiency while creating usable storage space in the loft. Manufactured with a 75mm graphite-enhanced EPS insulation core bonded between durable OSB facings, Insul91 provides insulation and load distribution in a single, easy-to-install panel. The integrated connecting spline joint ensures accurate alignment and stability across the loft floor, making it ideal for domestic loft storage upgrades and retrofit insulation projects where improved energy efficiency is required along with loft flooring.

Guarantee - 15 years

Features and benefits

Turn unused loft space into practical, insulated storage with Insul91 Loft Board. Designed specifically for non-habitable lofts, Insul91 combines high-performance insulation and durable boarding in one easy-to-install system. The 75mm graphite-enhanced EPS core delivers excellent thermal efficiency while the robust OSB facings provide a stable, load-spreading surface ideal for everyday storage. Unlike traditional loft boarding, Insul91 doesn’t compromise insulation to gain space. The integrated connecting spline ensures precise alignment and improved stability across joists, creating a secure and professional finish. Lightweight, cost-effective and quick to install, Insul91 is the smart solution for homeowners and installers looking to improve energy efficiency and unlock valuable storage without the expense or disruption of a full loft conversion.

High thermal performance in a slim profile Achieves a typical U-value of approximately 0.36 W/m²K using 75mm graphite-enhanced EPS insulation.
Insulation and loft boarding in one system Combines structural decking and insulation, reducing installation time and material handling on site.
Graphite EPS for enhanced efficiency Uses Stylite PlusTherm graphite EPS, delivering better thermal performance than standard white EPS at the same thickness.
Secure connecting spline joint Interlocking spline system improves panel alignment, joint strength, and load distribution across loft joists.
Lightweight and easy to install Panels are easy to handle and cut on site, speeding up installation and reducing labour effort.
Durable OSB/3 facings OSB/3 boards are suitable for load-bearing use in dry and humid conditions, providing long-term durability.
Cost-effective upgrade to traditional loft boarding Improves thermal efficiency and storage capability in a single product, offering strong value compared to separate insulation and boarding solutions.
Designed specifically for non-habitable loft spaces Optimised for loft storage and insulation upgrades without the complexity or cost of a loft conversion.

Specifications

Brand | Shire
Length (m) | 1.2m
Material | OSB 3
Pack quantity | 4
Thickness (mm) | 91mm
Timber type | Hardwood
Weight (kg) | 0.03kg
Width (mm) | 295mm
Product code | 5060989330876