Type J2 DPC Cavity Support and Closer 100mm - 2.4m Length

Product code: TYPEJ2
Brand: Cavity Trays
Estimated delivery: 2-3 Days
£21.13 inc vat
£17.61 ex vat
  • 1+ £21.13
    inc vat
    ex vat
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Please note, this is an uninsulated Cavity Support and Closer. Click here for the insulated equivalent.

Parapet construction requires a DPC immediately under the coping. BS5628:Part 3 qualifies the manner in which the DPC must be supported. The Type J closer fulfils the requirements of the British Standard, and also the N.H.B.C. performance standard, chapter 6.1, S4 (c) to (d). The conventional cavity parapet is normally terminated with copings, under which a DPC is bedded and positioned. The width of the DPC must be sufficient to slightly overhang the width of the parapet masonry. Support of the DPC is required where it crosses the cavity.

The Type J is designed for such purposes.
J1 = 130mm x 30mm x 2mm/2.5mm.
J2 = 150mm x 30mm x 2mm/2.5mm.


Provides DPC support and closes cavity under parapet copings. Also provides means of closing cavity in open eaves and other eaves details.


  • Standard lengths 2400mm.
  • J1 closer make it suitable for use in cavities from 50mm up to and including 90mm.
  • J2 is a larger closer suitable for use in cavities from 90mm up to and including 130mm.
  • Material PVCU, Type 4.
  • Available with insulated infil of K-value 0.037 W/mºC.

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Questions & Answers


Can you use this product under aluminium capping for closing off parapet ?


The function of the Type J is to support the DPC that is fitted beneath a coping and to prevent it from sagging into the cavity. If you are fitting an aluminium capping onto the parapet wall, it is likely no DPC will be required (so nothing to be supported). If you simply wishes to close/cap the cavity at the top of the wall before fitting the aluminium capping then the Type J could be used to achieve this, but may not be fully necessary.

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Type J2 DPC Cavity Support and Closer 100mm - 2.4m Length

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Type J2 DPC Cavity Support and Closer 100mm - 2.4m Length

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