170mm Stylite Plustherm Grey EPS 70 Board

170mm Expanded polystyrene (EPS) insulation boards deliver outstanding thermal performance for external wall insulation systems, dramatically improving building efficiency and U-values whilst minimising water ingress and condensation risks. These 170mm boards work seamlessly with timber, masonry, system-built properties, tile hanging, and numerous rendering finishes. Installation involves adhesive and mechanical fixings to masonry or timber-backed walls, with cavity void applications also supported for cavity wall insulation work.

170mm Stylite Plustherm Grey EPS 70 Insulation Board stands out as the preferred choice for external wall insulation systems, delivering exceptional performance at competitive pricing. Selecting a cost-effective 170mm EPS board means achieving significant savings whilst maintaining superior quality and thermal efficiency.

Installation of 170mm EPS within an EWI system benefits from lower material costs. The lightweight nature of EPS means installers can use lower-strength adhesives and plastic fixings rather than heavy-duty metal alternatives. Since 170mm Stylite EPS is non-breathable, it permits the application of economical thin coat renders, including EWI-075 Silicone Render or EWI-040 Acrylic Render.

Product specification

• Brand: Stylite®
• Model: 170mm Grey EPS EWI 70
• Thickness: 170mm
• Dimensions: 1,200mm x 600mm x 170mm
• Length: 1200mm
• Width: 600mm
• Board Coverage: 0.72m2
• Pack Coverage: 5.04m2
• Weight: 13.02kg
• Weight/m2: 1.13kg
• Compressive Strength: 70 kPa
• Bending strength: >= 75kPa
• Density: 20kg/m3
• Thermal Resistance: 0.66m2K/W
• Thermal Conductivity: 0.032W/mK
• Grades: EPS 70 & Plustherm
• Edge Profile: Plain edge profile
• Colour: Grey ǀ Graphite
• Material: Expanded Polystyrene
• Profile: Square Edge
• Application Temperature: from +5 °C to +25 °C
• Applications: External Wall Insulation Systems
• ETA Notification: Yes
• Features: High performance thermal insulation board
• Manufacturer: SPI Stylite Styrene®

Typical Applications

170mm Stylite Expanded Polystyrene insulation boards provide an excellent solution for external wall insulation projects. These boards attach directly to existing wall substrates, instantly enhancing both aesthetic appeal and thermal performance. Applying insulation to the external wall surface rather than internally significantly reduces the likelihood of interstitial condensation developing within wall cavities.

Stylite 170mm External Wall Insulation board accommodates diverse wall types, from solid brick construction to timber frame walls. External wall insulation typically receives a rendered protective coating, with application methods varying by system specification. Furthermore, 170mm Stylite EWI boards suit rail or drained cavity EWI system configurations.

Preparation

Deploy netting on scaffolding to prevent polystyrene debris dispersal during windy conditions. We strongly advise using hot knives or hot wire cutters to minimise polystyrene waste generation, though standard knives remain viable if necessary. Ideally, perform cutting of 170mm EPS insulation boards within covered spaces to prevent offcuts from becoming airborne.

EPS Insulation Application

Always follow the manufacturer's installation specifications for EPS insulation boards, ensuring comprehensive coverage of design and application requirements. Begin by securing EPS boards to the substrate (masonry or timber) using mortar/adhesive or mechanical fixings.

Once boards are affixed to external walls, apply a protective outer layer such as mortar basecoat or netting to shield against excessive heat, moisture, and UV damage.

Before applying basecoat or mortar for fibreglass mesh installation, rasp or sand the board surface to achieve an abrasive finish. Once complete, the substrate is prepared for fibreglass mesh application. Consult the full installation guide for comprehensive guidance.

EPS Insulation Storage

Verify the manufacturer's expiry date for shelf life information. Store in dry conditions within original packaging. Protect from excessive heat and direct UV exposure.

More Information on 170mm Stylite Plustherm Grey EPS 70 Insulation Board

• Manufaturer Link: 170mm Stylite EPS70
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