Mineral Wool Reinforcement Collar - 90mm

Brand: Wkret-Met
SKU: WKR-TDX-90

 

Pack of 100 Collars

£24.66 Incl. VAT
£24.66 Incl. VAT (regular price)
Please note: This product has a slightly longer lead time. Our team wiil notify you with an estimated delivery date.

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    The Mineral Wool Reinforcement Collar – 90mm is a fibreglass-reinforced polymer spreader plate designed to support mechanical fixings when installing mineral wool insulation boards, including lamella. Used in combination with EWI fixings, it increases the contact area and improves pull-through resistance, ensuring stable and long-lasting installation under wind loads.

    Suitable Insulation Boards

    Insulation Type Compatibility
    Mineral Wool Compatible
    Mineral Wool Lamella Compatible
    EPS / XPS / PIR / Wood Fibre Not required / not recommended

    Compatible Fixings

    Fixing Type Compatibility
    Hammer Fixings Compatible
    Screw Fixings Compatible

    Used as a supplementary disc with EWI mechanical fixings to improve load distribution on mineral wool systems.

    Key Features

    • Fibreglass-reinforced polymer for durability and strength.
    • Improves load distribution and pull-through resistance.
    • Essential for mineral wool lamella and slab systems.
    • Compatible with both hammer-in and screw-in fixings.
    • Lightweight, impact-resistant, and easy to install.
    • Supports high wind-load performance in ETICS applications.

    Sizes & Box Quantities

    Size Box Quantity
    90mm diameter 100 per box

    Application

    Preparation

    • Ensure mineral wool boards are properly bedded and adhesive has been applied as specified.
    • Select suitable mechanical fixings for the substrate.

    Installation steps

    1. Place the collar over the fixing point on the insulation surface.
    2. Insert the chosen fixing through the centre of the collar.
    3. Drive the fixing into the substrate until the collar sits flush.
    4. Continue fixing to specified density, increasing fixing count in high-suction areas.

    Quality checks

    • Ensure collars sit flat and are not dished or distorted.
    • Confirm secure fixing hold without crushing insulation.

    Frequently Asked Questions

    It increases the contact area around the fixing to improve pull through resistance and keeps mineral wool boards secure under wind load. It is especially useful for lamella and slab systems.

    Use it with mineral wool insulation, particularly lamella and slab boards. It is not required for EPS, XPS, PIR or wood fibre.

    It works with hammer in fixings and screw in fixings.

    Use it only with mineral wool systems. It is not recommended for EPS, XPS, PIR or wood fibre.

    Lamella boards have vertically aligned fibres, so they are more flexible. The collar spreads the load and helps prevent the fixing head from pulling through under wind pressure.

    Place the collar over the fixing point, insert the fixing through the centre, then drive the fixing into the substrate until the collar sits flush with the surface.

    Not if installed correctly. Make sure they sit flat and flush without distortion and avoid overtightening.

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