XPS - Mayplas Cavity Closer XPS

The range of Cavity Closers from Mayplas provide an easy, effective and economical solution when closing cavities within openings in masonry walls for windows and doors.

The Mayplas Cavity Closer XPS incorporates a UPVC outer which acts as a damp proof barrier while the insulated XPS core reduces thermal bridging.

Mayplas Cavity Closer XPS is available in options to suit check and flush reveal applications.



Assists in satisfying the requirements of Approved Document C & L (England & Wales).

Intended for first and second fix applications.

Available in single flange to suit check reveal applications (severe weather conditions) or double flange for flush reveal applications.

Thermal Values

• Insulation Thickness (mm) 25
• Thermal Conductivity (K Value) 0.033 W/mK


• Reduces thermal bridging
• Reduces heat loss
• Prevents condensation, staining and mould
• Lightweight
• Easy to install
• Minimal wastage during construction
• All versions of Alticloser will contribute towards compliance under Accredited Construction Details and Enhanced Construction Details


Length: 2.4m

Cavity Widths:

• 50mm (single flange only)
• 65mm (single flange only)
• 75mm up to 250mm

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