Rigid XPS Insulation Ceiling Boards (IsoBoard & Summit Board)

Our premium range of rigid Extruded Polystyrene (XPS) insulation boards represents the absolute pinnacle of high-density thermal performance, featuring a 100% closed-cell structure that guarantees exceptional structural integrity. The Packhouse Insulation proudly supplies two of South Africa’s most trusted and highly specified architectural makes: IsoBoard and Summit Board. Manufactured using highly automated extrusion technology in accordance with international specifications, these rigid insulation boards boast an incredibly uniform density, long-term low thermal conductivity, and excellent compressive strength. Because they are structurally resilient, do not readily age, and provide outstanding resistance to degradation, they offer an elite, maintenance-free comfort-to-cost ratio across residential, commercial, and industrial markets. Both choices contain advanced properties with minimal to zero ozone depletion potential, offering an environmentally friendly, “green” building solution for modern construction projects.

Structural Application Variations

• Nail-Up & Standard Ceiling Systems: Perfect for replacing worn out, outdated ceiling systems or retrofitting existing buildings with an insulated, highly polished ceiling line that replaces the need for separate plasterboards and loose-fill insulation blankets.

• Over-Purlin, Over-Truss, & Over-Rafter Layouts: Broadly utilized across retail, commercial, industrial, and residential steel or wooden frame roof designs, serving as a highly rigid, load-bearing shield laid directly over structural members right below the outer roof sheeting.

• Total Building Envelope Integration: Highly versatile manufacturing tolerances allow these boards to be utilized effectively within perimeter cavity walls, below concrete roofing decks (inverted roof layouts), under concrete soffits above exposed parking grids, and beneath surface beds to insulate floors from the earth’s temperature.

• Custom Board Finishes & Edging: Available in professional surface finishes including clean plain, smooth, edge-bevelled, or attractive grooved pine aesthetics (such as IsoPine), featuring interlocking tongue-and-groove profiles, shiplap edging, or straight edges to guarantee tightly sealed, draught-free joints.

Problem-Solving Profile

• Solves Severe Seasonal Heat Transfer: Provides exceptional resistance to indoor heat flow, aggressively slashing heavy radiant heat entry during harsh summers while trapping interior artificial warmth during winter to significantly drop building energy consumption and cooling costs.

• Solves Moisture, Damp, & Vapour Permeability: Offers outstanding resistance to water vapour diffusion, limiting water absorption to a maximum of only 1% by volume. This prevents long-term thermal resistance degradation, controls condensation in high-humidity applications, and eliminates the risk of water staining or rot.

• Solves Pest Infestation & Structural Fire Risks: Formulated to incorporate specialized self-extinguishing fire retardants and non-flammable blowing gases that refuse to propagate or sustain fire in exposed roof applications. Additionally, the inorganic mineral composition is entirely odourless, chemically inert, and provides zero nutritional value, ensuring it never breeds or supports fungi, mould, bacteria, or vermin.

Quick Technical Specs

• Thickness Availability Matrix: Supplied in standard functional thicknesses of 30mm, 40mm, and 50mm, alongside heavy-duty special-order commercial profiles ranging from 60mm up to 100mm.

• Length & Width Configurations: Standard board widths are manufactured in structural configurations (including 600mm and 1200mm options) to seamlessly line up with specific grid gaps, with available board lengths spanning from 1800mm (1.8m) up to a continuous 8000mm (8m) to minimize on-site joint lines and cutting waste.

• Certified Thermal Resistance (R-Value Scale): Delivers precise, code-compliant thermal values across all thickness tiers, starting at an efficient 1.00 m²K/W at 30mm and sealing up to an impressive 3.34 m²K/W at 100mm.

• Physical Operating Environment: Safely engineered to maintain total structural stability and cellular pressure across a broad operational window spanning from an ultra-cold -30°C up to a high ambient temperature of +60°C.

• High Compressive Strength Limits: Formulated with premium high-density properties (averaging 32-36 kg/m³ density depending on selection) that generate reliable compressive capacities ranging from 160 kPa up to 310 kPa based on board thickness.