Copyright 2025 © LAMBDABOARD®
LAMBDABOARD® is made from polyisocyanurate (PIR), a high-performance insulation material. It’s produced using advanced technology and contains a special blowing agent with zero impact on the ozone layer and very low global warming potential — making it a smart choice for the environment too.
LAMBDABOARD® is a strong, rigid board that can be used in many different ways — under roof coverings, inside cavity walls, or under floors. It’s a great way to improve comfort and reduce energy use.
LAMBDABOARD® is a polyisocyanurate (PIR/Polyiso) thermal insulation board manufactured on a continuous laminator and locally produced in South Africa. LAMBDABOARD® ensures your building meets not only legal requirements but also your expectations with regard to sustainability and energy efficiency over the lifespan of the building. LAMBDABOARD® has a low thermal conductivity that offers optimal thermal performance at minimal thickness.
LAMBDABOARD® is available with a variety of facing options to suit your project needs. The white mineral facing provides a paintable surface, while the Gunmetal Grey and Obsidian Black options feature integrated pigments for a pre-coloured finish. Agricultural-grade facings are also available for more robust applications.
LAMBDABOARD® is uniquely positioned in the market—there are no true alternatives to this PIR/polyiso rigid insulation board.
White Mineral
Ecolam
Ecolam 5C
Embossed Foil
Gunmetal Grey
Kraft
Natural Mineral
Obsidian Black
LAMBDABOARD® reduces heat flow in and out of the building, helping maintain a stable indoor temperature - cooler in summer and warmer in winter.
Thanks to its exceptionally low thermal conductivity LAMBDABOARD® reduces the energy needed to keep your building comfortable, helping cut heating and cooling costs.
LAMBDABOARD®'s Coated Glass Facer (CGF) is fully paintable with your choice of paint. Just follow the paint manufactureres application guidelines. Its thermoset structure is resistant to common construction solvents like paints, adhesives and alkalines.
LAMBDABOARD® offers the highest aged R-values peer board thickness. This means you can achieve excellenet thermal performance with less material.
Lightweight, dimensionally stable, and with excellent spanning capabilities, LAMBDABOARD® is quick and easy to install - whether for professional installers or DIY projects.
LAMBDABOARD® can be easily installed in both new builds and existing buildings - either between or under purlins. Support sections should be fitted to match the board thickness and span.
LAMBDABOARD® comes in various thicknesses and lengths to meet thermal requirements and building codes. Boards can be cut to custom lengths to suit your project.
Standard sizes and facing options are kept in stock at all branches, ensuring quick and consistent supply for your project needs.
Choose from a variety of facings to suit different applications and project requirements.
DECOBOARD® by LAMBDABOARD® is a better tounge-and-groove ceiling and insulation board for ceilings, over-rafter, and between-truss applications. It offers better thermal performance, better durability, and better aethetics - delivering a better all-in-one solution for your ceiling designs.
DECOBOARD® is quick and simple to install with its tounge-and-groove edges and concealed clip system for a seamless finish.
Made from thermoset material DECOBOARD® won't soften, melt, or drip when exposed to flames, offering added fire resistance.
Choose DECOBOARD® with or without elegant V-Grooce detailing. Go for a clean, smooth finish or a subtle decorative touch to suit your design style.
DECOBOARD® offers the highest R-value at 30mm thickness - delivering excellent energy efficiency by reducing heat loss in winter and heat gain in summer.
DECOBOARD® is easy to paint or varnish, allowing you to match any interior design or decor style effortlessly.
MWith its smooth finish and optional V-Grooce detail, DECOBOARD® delivers a sleek, modern look that enhances any ceiling space.
Retofit DECOBOARD® directly over existing ceilings - no need for messy ceiling removes (Consult our sales team for guidance.)
For even greater thermal efficiency, DECOBOARD® can be paired with Knauf insulation products.
A closed-cell, thermosetting polisocyanurate (PIR/Polyiso) foam core, integrally bonded to durable facers on both sides. LAMBDASLAB® has Zero Ozone Depletion Potential (ODP) and Global Warming Potential (GWP) of less than 1. It is available in thicknesses from 25mm to 100mm, 1 200mm wide offered in various lengths to suit project requirements.
Application:
Designed for under-slab insulation in temperature-controlled environments within the cold chain, as specified by the engineer. It provides enhanced thermal performance and helps reduce thermal bridging in slab construction.
A closed-cell, thermosetting polisocyanurate (PIR/Polyiso) foam core, integrally bonded to durable facers on both sides. LAMBDASLAB® has Zero Ozone Depletion Potential (ODP) and Global Warming Potential (GWP) of less than 1. It is available in thicknesses from 25mm to 100mm, 1 200mm wide offered in various lengths to suit project requirements.
Application:
Designed for under-slab insulation in temperature-controlled environments within the cold chain, as specified by the engineer. It provides enhanced thermal performance and helps reduce thermal bridging in slab construction.
Closed-cell thermosetting polyisocyanurate (Polyiso) foam core, integrally bonded to inorganic coated glass tissue facers on both sides. Zero Ozone Depletion Potential (ODP) and <1 Global Warming Potential (GWP). Available in 25mm to 100mm thickness, 1220 wide, offered in various lengths.
Application: Laminating on a continuous or discontinuous line for thermal insulation panels, where optimal thermal and fire performance is required in the built environment.
Figures above based on 3 purlin spacings and more with no longitudinal support.
| Thickness | No Sections | T-Sections | H-Sections |
|---|---|---|---|
| 25mm | 1 300mm | 1 400 - 1 800mm | 1 900 - 2 800mm |
| 30mm | 1 400mm | 1 500 - 1 800mm | 1 900 - 2 800mm |
| 40mm | 1 800mm | 1 900 - 2 100mm | 2 200 - 2 800mm |
Fill in the form below
Figures above based on 3 purlin spacings and more with no longitudinal support.
| Thickness | No Sections | T-Sections | H-Sections |
|---|---|---|---|
| 25mm | 1 300mm | 1 400 - 1 800mm | 1 900 - 2 800mm |
| 30mm | 1 400mm | 1 500 - 1 800mm | 1 900 - 2 800mm |
| 40mm | 1 800mm | 1 900 - 2 100mm | 2 200 - 2 800mm |
LAMBDABOARD® has the highest aged R-Value per board thickness, which means you need less material to achieve your building's required thermal performance.
Learn more about R-Values and Thicknesses| Thickness (mm) | R-Value | Thickness (mm) | R-Value |
|---|---|---|---|
| 25mm | 1.04 | 30mm | 1.25 |
| 35mm | 1.45 | 40mm | 1.67 |
| 45mm | 1.88 | 50mm | 2.08 |
| 55mm | 2.29 | 6mm | 2.5 |
| 65mm | 2.71 | 70mm | 2.92 |
| 75mm | 3.13 | 80mm | 3.33 |
| 85mm | 3.54 | 90mm | 3.75 |
| 95mm | 3.96 | 100mm | 4.17 |
LAMBDABOARD® can be retrofitted or new build, either between or under purlin. For the structural integrity of the installation support sections are required to suit thickness of board and spanning area.
LAMBDABOARD® comes in a variety of facing options to suit your project requirements. The white mineral facing of the LAMBDABOARD® allows for a paintable surface, where as the Gunmetal Grey and Obsidian Black LAMBDABOARD® is pre-coloured using pigment into the facing allowing a coloured finish. Agricultural facing options are available should your project require a robust application.
LAMBDABOARD'S® solutions skimming and plastering of boards
LAMBDABOARD® can be installed using our concealed clip system (for boards up to 40mm) as an alternative to nailing into timber battons. This method delivers a cleaner, more refined finish.
RIGIBond 5 is a two-component filled polyurethane adhesive used to bond LAMBDABOARD®, internal insulation cores and other suitable substrates, including concrete, metal sheeting, bitumen torch on membranes etc. The adhesive does not contain any solvents and is VOC free. This adhesive is suitable for batch mixing. The adhesive can withstand constant exposure to temperatures up to 100º C.
Learn more about RIGIBond 5
Obtain estimates for your potential energy savings and the projected temperature variances between outdoor and indoor environments. These estimations are based on various configurations of LAMBDABOARD® insulation in a hypothetical scenario without the presence of an HVAC system or roofing insulation. Furthermore, you can anticipate reduction in your energy expenses, stated in Rand per square meter, on an annual basis by incorporating LAMBDABOARD® insulation whilst aligning with the SANS 10400 XA ED2 regulations.
For any guidance, please reach out to our rational design department. Please be aware that the provided information relies on simulated theoretical data generated through the use of Agreement software - BISMAC, in accordance with the relevant South African National Standard.
LAMBDABOARD® Thickness
0mm
Actual outside temperature
31° C
Calculated inside temperature
Annual energy usage (kW/h)
Annual energy savings (kW/h)
Rand saving per annum-Eskom rate
Approximately 70% of a building’s heat loss occurs through the roof, highlighting its significance in energy inefficiency. Proper insulation and ventilation are essential to prevent this heat escape, which helps lower heating costs and improve energy efficiency. Addressing roof heat loss can significantly enhance indoor comfort and maintain consistent temperatures.
LAMBDABOARD® is a high-performance thermal insulation solution designed for homes. It helps regulate indoor temperatures, providing energy savings by
LAMBDABOARD® is a high-performance thermal insulation solution designed for homes. It helps regulate indoor temperatures, providing energy savings by
Training Schedule (CPD and Contractors)
Venue: Premier Hotel
Join us in OuBaai for our next CPD event.
Venue: Premier Hotel
Join us in East London for our next CPD event.
Venue: Lord Charles Hotel
Join us in Nelspruit for our next CPD event.
Looking to contact our department? Our team is here to assist you with any inquiries, support requests, or service needs. Reach out today we’re ready to help you find the right solution.
