RYTWEEP – Rytons Rytweep® (Cavity Weep)

General Details

RYTWEEP – Rytons Rytweep® (Cavity Weep)

  • An unobtrusive cavity weep hole duct.
  • Virtually invisible when installed; showing only the small weep outlet.
  • The simple design allows quick and easy fitting with no special brickwork required.
  • Flush face maintains the aesthetic appearance of the building.
  • Lugs aid mortar adhesion for efficient installation.
  • Compatible with Rytons Rytweep® Tube RYTWTUBE for use in blockwork or to allow for rendering.
  • To protect the outlet from blockage during rendering or water penetration during flooding use Rytons DamRyt® Rytweep® Protector DAMWEEP.
  • The ultra-clear Rytweep® has UK Patent Pending GB1911110.3.
  • PLEASE NOTE: This item is a plastic component, and therefore not suitable for use within the external walls of high-rise buildings requiring non-combustible materials, i.e. those 18m high or more complying with Regulation 7(2) and Approved Document B, and those 11m high or more complying to 2.7 of Building (Scotland) technical handbook.  For a compliant alternative see Rytons A1 Fire-rated Metal Rytweep part of Rytons A1 Fire-rated Ventilation Range.


  • 101mm L x 66mm H x 10mm W (see image gallery above).
  • CAD drawing available by email.

Free Area:

  • Not applicable.

Colours and Codes:

  • Clear: RYTWECL.
  • Terracotta: RYTWETC.
  • Buff/Sand: RYTWEBS.


  • High impact polystyrene.


  • Installation is fast and easy as work proceeds with a Rytweep replacing the vertical mortar joint.  Ensure the tapered end with the circular outlet is facing the outside and is flush with the external face.  Position the bottom of the Rytweep on the mortar bed against the brick/block.  Postion the next brick alongside the installed Rytweep and mortar in until only the small weep outlet is visible (ensuring the outlet does not become blocked).  Space every fourth brick to drain cavities above and below the dpc, and above lintels and cavity trays.  At least two weep holes should be provided over an opening, i.e. lintel.

Reference Material:

  • NHBC Standards 6.1.17.  Where fairfaced masonry is supported by lintels weep holes should be provided at a maximum of 450mm intervals and each opening should have at least two weep holes.
  • NHBC Standards 6.11.7c.  Rendering shall be detailed to ensure appropriate weathertightness and durability.  Issues to be taken into account include … c) weepholes.  Weepholes should be provided: „„where required for ventilation to timber frame construction; „„to the last tray at stepped abutments; „„in severe or very severe exposure zones where rendering is returned back into the window or door head (weepholes are not required where the render is not returned); „to cavity trays on parapet walls.
  • The Building Regulations, Approved Document C, Internal and external walls (moisture from the ground) 5.5 (b) If the wall is an external wall, the damp-proof course should be at least 150mm above the level of the adjoining ground. 5.5 (c) If the wall is an external cavity wall provide weep holes every 900mm to assist in the transfer of moisture through the external leaf.  Where the damp-proof tray does not extend the full length of the exposed wall, i.e. above an opening, stop ends and at least two weep holes should be provided.
  • Also, refer to British Standards BS 8215.

Handling Information:

  • Box quantity: 200no.
  • Box size: 27cm W x 28cm H x 18cm D.
  • Box weight: 2kg.

NBS Specification:


Rytons is proud to be a family run business and British manufacturer since 1972

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Please note: As a manufacturer, we deal exclusively with trade professionals and are unable to take price enquiries from members of the public.
We aim to respond to quote requests within the next working day.
In case of query please call 01536 511874, thank you.

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