Fiberglass PIR Insulation Board 50mm

Thickness : 50mm (optional 10-80mm)

Facing material : 600micron fiberglass tissue

Density : 30-50 kg/m3

Size : 1.2 m / 0.6m width, length can be customized

High-Performance Rigid Foam 50mm PIR Insulation Board

The Fiberglass PIR Insulation Boards 50mm is a premium rigid insulation board made with a high-density polyisocyanurate (PIR) foam core and fiberglass tissue facings on both sides. Designed for enhanced thermal efficiency and durability, this 50mm insulation panel is ideal for building wall insulation, building roof insulation, and floor systems—making it suitable for both new constructions and renovation projects.

Why 50mm Polyisocyanurate Panels Stand Out

The PIR Insulation Boards 50mm is a widely adopted standard in modern building insulation.

Its popularity comes from its ability to deliver outstanding thermal performance in a compact and lightweight form.

With a low thermal conductivity of less than 0.024 W/m·K, this rigid insulation board provides exceptional energy efficiency while saving valuable installation space.

It is a go-to solution for architects and builders prioritizing thermal performance and structural reliability in both building roof insulation and building wall insulation projects.

PIR Foam Thermal Insulation Board With Fiberglass

Technical Data Sheet

Property	Standard	Specification
Standard Width		600/1200mm
Thickness		50mm
Foam Density	ASTM D1622/D1622M-14	30-50kg/m³
CFCs and HCFCs	Headspace GC/MS	Free
Thermal Conductivity	ASTM C518-17	<=0.024W/m.K
Fire Rating	BS 476 Part 6&7	Class 0
Compressive Strength	ASTM D1621-16	>=0.15Mpa
Tensile Bond Strength	DB34/T 3826-2021	>=0.15Mpa
Water Absorption by Volume	ASTM C209-15	<3%
Dimensional Stability		70ºC 48h<=1.5% -30ºC 48h<=1.0%
Service Temperature	DB34/T 3826-2021	-30ºC – 120ºC

Why Choose GFI PIR Thermal Insulation Board?

PIR Insulation Boards with fiberglass tissue are a type of insulation material used in construction for their excellent thermal properties and added strength provided by the fiberglass tissue layer. Here’s what this combination offers:

01 / Optimized Thickness for Modern Construction: With its 50mm thickness, this building insulation panel balances high thermal performance and installation ease. It fits easily into confined cavities in wall systems and layered roof structures, making it an optimal choice for space-efficient insulation design.

02 / Fiberglass Tissue Facing for Strength and Durability: Polyisocyanurate Foam has inherently good fire-resistant properties, making it a preferred choice for insulation in buildings where fire safety is a concern.

03 / Advanced PIR Core for Energy Savings: Unlike foil-only facings, the fiberglass tissue improves rigidity and handling durability. It resists moisture, cracking, and mechanical damage during installation, while offering excellent bonding performance for render coatings or mechanical fasteners. This makes it an ideal choice for site conditions demanding tough and reliable insulation.

04 / Moisture Resistance and Fire Safety: Made with over 90% closed-cell foam, the panel naturally repels water and retains its insulation value in humid conditions. It also meets BS 476 Part 6 & 7 Class 0 fire safety standards, limiting flame spread and reducing smoke emissions—making it suitable for use in high-compliance construction.

Typical Applications of 50mm Building Insulation Panels

Building Wall Insulation: Serves as the thermal core in external and internal wall assemblies, suitable for render, cladding, or mechanical fixing.
Building Roof Insulation: Ideal for flat or pitched roofs—can be applied above membranes or between rafters.
Floor Insulation Systems: Performs well in suspended and concrete floors, enhancing both thermal performance and indoor comfort.
Curtain Wall Systems & Cladding: Provides a non-combustible thermal barrier behind ventilated façades or glazed assemblies.

Buring Comparison Test

The following pictures show the state of the RLB-l Polyisocyanurate Insulation fireproof composite board under the direct combustion of the 1300℃ flame torch for each period of time. During the entire experiment, the RLB-I Polyisocyanurate Insulation Board did not burn through and did not drip water. Preventing flame spread and heat conduction, no burning phenomenon.

A Smarter Choice for Sustainable Construction

Choosing GFI’s Polyisocyanurate building insulation panel means less material usage to meet thermal codes—lowering transport costs, reducing jobsite waste, and supporting green building practices. These rigid insulation boards contribute to long-term sustainability goals while delivering immediate performance benefits.

Ready for Delivery – GFI Polyisocyanurate Insulation Panels

GFI’s PIR Insulation Boards 50mm are available in thicknesses ranging from 10mm to 80mm, offering design flexibility across different climate zones and construction types. Each board is faced on both sides with either 0.6mm fiberglass tissue or 0.08mm aluminum foil, with other optional surfaces including aluminum foil paper and kraft paper, to meet varied requirements in moisture resistance, fire performance, and surface durability. Standard widths include 1200mm and 600mm, suitable for streamlined installation.

Need a reliable PIR rigid insulation board that combines thermal excellence, fire safety, and long-term durability? GFI’s PIR building insulation panels are now available for global supply. Contact us today for datasheets, pricing, or custom size orders.