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80mm Kingspan GreenGuard XPS Extruded Polystyrene Insulation 300kpa (3.75m2/Pack)
| 15+ packs | 30+ packs | 40+ packs |
| £57.21ex. VAT | £56.63ex. VAT | £56.06ex. VAT |
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Rigid closed-cell extruded polystyrene insulation board. Provides 300 kPa compressive strength for heavy-load floors, basements, and inverted roofs. 80mm thickness delivers solid performance for general use.
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Product Overview
Rigid closed-cell extruded polystyrene insulation board. Provides 300 kPa compressive strength for heavy-load floors, basements, and inverted roofs. 80mm thickness delivers solid performance for general use.
Delivery & Returns Information
How Our Delivery Works
We work with a nationwide network of trusted suppliers. As a result, items in your basket may be supplied by different suppliers and delivered separately. Where this applies, you'll see multiple delivery charges at checkout. We always aim to group products from the same supplier to keep delivery costs as low as possible.
Delivery Areas & Charges
Delivery charges listed on our website apply to mainland UK, excluding the following postcode areas: AB, CF, DD, DG, EH, FK, KA, KW, KY, IV, LA, LD, LL, ML, NP, PA, PH, SA, SY & TD
If your delivery address falls within one of these postcode areas, we’ll be in touch before processing your order to confirm any additional delivery costs.
Please note: We do not currently offer delivery outside the UK mainland.
Standard (Nationwide) Delivery
| Insulation, Plasterboard and Drylining Products | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £350 | £35 ex. VAT |
| Over £350 ex. VAT | FREE |
| Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £100 | £20 ex. VAT |
| Over £100 ex. VAT | FREE |
| Screws & Fixings and Adhesives & Sealants | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £50 | £5 ex. VAT |
| Over £50 ex. VAT | FREE |
Express Delivery
| Express Delivery - Insulation and Plasterboard & Drylining | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £50 ex. VAT |
| Over £400 ex. VAT | £35 ex. VAT |
| Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £50 ex. VAT |
| Over £300 ex. VAT | £35 ex. VAT |
Returns
We offer a 30 day returns policy on any faulty products.
Key Features
- {{blur_off}} Rigid, closed-cell thermal insulation material
- {{assignment_turned_in}} For floors, basements, and inverted roofs
- {{fitness_center}} Durable performance under sustained load
- {{water_drop}} Low water absorption
Technical Specification
| Material Type: | XPS |
|---|---|
| Thickness: | 80mm |
| Width: | 600mm |
| Length: | 1250mm |
| Pieces Per Pack: | 5 |
| Sales Unit: | Pack |
| Sales Unit Coverage: | 3.75m2 |
| Brand: | Kingspan |
| Weight: | 9kg |
| Compressive Strength: | 300kPa |
Technical Downloads
Product Overview
Kingspan GreenGuard XPS Extruded Polystyrene Insulation Board with an 80mm thickness and 300kPa compressive strength. A rigid, closed-cell thermal insulation material for floors, basements, and inverted roofs.
Its dense cellular structure delivers long-term durability under sustained load, maintaining both mechanical strength and thermal integrity beneath concrete slabs, paving, or ballast.
Resistant to water absorption, vapour transmission, and freeze/thaw cycling, it ensures consistent insulation even in demanding environmental conditions. Lightweight yet structurally stable, the boards are easy to cut and position, enabling rapid installation with precise joint alignment and no loss of compressive or thermal performance.
The 80mm thickness provides enhanced thermal resistance and mechanical stability.
Features & Benefits
- High compressive strength: Withstands 300kPa load, supporting use under heavy floors or roof ballast.
- Closed-cell structure: Prevents water ingress and maintains insulation properties in damp conditions.
- Reliable thermal performance: Thermal conductivity typically 0.034 W/m·K for consistent energy efficiency.
- Durable and lightweight: Resists damage during handling and installation while remaining easy to cut and shape.
- Moisture resistant: Retains dimensional stability and mechanical performance when exposed to wet conditions.
- Sustainability performance: Produced with zero ozone depletion potential (ODP) and low global warming potential (GWP).
- Thickness suitability: 80mm board thickness provides enhanced thermal resistance and mechanical stability.
Applications
- Ground floors: Provides an insulation layer under screed or slab floors.
- Inverted roofs: Suitable for thermal protection above waterproof membranes.
- Foundations and perimeters: Effective where compressive strength and moisture resistance are essential.
Installation Guidance
- Substrate preparation: Surfaces should be level, clean, and free from standing water.
- Cutting: Score and snap or use a fine-toothed saw to achieve tight joints.
- Fixing: Apply in staggered bond with adhesive or mechanical fixings appropriate to the substrate.
- Protection: Shield from UV exposure and site traffic before covering.
- Weather conditions: Avoid open flame or solvent contact during installation.
- Storage: Store flat, under cover, and away from direct sunlight.
Compliance & Performance
- Thermal conductivity: 0.034 W/m·K.
- Compressive strength: 300kPa at 10% compression.
- Water absorption: ≤ 0.7% by volume.
- Manufacturing standard: EN 13164 for extruded polystyrene (XPS).
- Environmental profile: Zero ODP, low GWP.
- Important note: Always install per Kingspan technical guidance. Protect from ignition sources and prolonged sunlight exposure.
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How to Install XPS Insulation
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Difference Between XPS and EPS Insulation
