The 8mm Screw Fixing with Metal Pin & Short Expansion Zone is a robust, screw-in fastener for external wall insulation (EWI) systems. It features a durable polyethylene body and a steel pin sealed in a plastic head to reduce point thermal conductivity and resist corrosion. The short 8mm expansion zone delivers strong anchorage with minimal installation effort, while the innovative sleeve ensures a flush finish and stable performance. Suitable for EPS, XPS and Mineral Wool (with support washers), this fixing offers quick, controlled installation via a TX-40 drive.

Suitable Insulation Boards

Compatible Substrates (ETA Categories A–E)

If the substrate condition is uncertain, carry out a pull-out test to confirm suitability.

Key Features

• TX-40 screw-in drive for quick, controlled installation with reduced risk of substrate damage.
• Plastic-sealed steel pin minimises point thermal transmittance and improves corrosion resistance.
• Short 8mm expansion zone provides strong anchorage in a wide range of substrates.
• Innovative sleeve and collar seat flush with insulation; adhesive pockets improve bond to basecoat.
• Compatible with EPS, XPS and Mineral Wool (support washers required for Mineral Wool).
• ETA-13/0724 approved for EWI/ETICS applications.

Sizes & Box Quantities

Select length based on insulation thickness + adhesive layer + required embedment depth.

Application

Preparation

• Mark out the fixing grid to suit the system design and wind-load zone.
• Check for hidden services (cables/pipework) before drilling.
• Select the correct drilling mode: use rotary-only for hollow blocks and AAC; use hammer mode for dense concrete/brick as appropriate.

Installation steps

1. Apply adhesive to the boards per your EWI specification and place boards tightly with staggered joints.
2. Drill perpendicular through the insulation into the substrate using the selected drilling mode; clean the hole of dust.
3. Insert the fixing body.
4. Drive the metal pin using a TX-40 bit until the washer is seated flush; do not over-drive or dish the insulation.
5. Install the specified number of fixings per board, adding extras around corners, openings and high-load areas.
6. Proceed with basecoat and reinforcement mesh in line with the system specification. Surface or recessed installation may be used where specified.

Fixing pattern & density

• Follow the project design; as a guide, many façades use 4–6 fixings per m², with additional fixings at edges and around openings.
• Maintain consistent edge distances; avoid placing fixings too close to board edges or through joints unless specified.

Quality checks

• Carry out pull-out tests where substrate variability is suspected.
• Replace any fixings that spin or fail to grip; re-drill if necessary.