RYTWEA1METAL – Rytons Rytweep® A1 Metal (Fire-rated Cavity Weep)

General Details

RYTWEA1METAL – Rytons Rytweep A1 Metal (Fire-rated Cavity Weep)

  • Rytons popular concealed-design cavity weep hole duct diecast in zinc metal and electroplated with a two part coating.
  • Considered fire class A1 without testing, as per European Commission paper 96/603/EC referred to in BS EN 13501-1:2018.
  • Suitable for use in high-rise buildings with a storey 18m or more above ground level to Regulation 7(2) and Building Regulations Approved Document B.
  • Suitable for use in buildings with a storey 11m or more above ground level to Building (Scotland) technical handbook 2019: domestic and non-domestic, 2.7.
  • Classification: A1.  Definition: Non-combustible.  Description: No contribution to fire.
  • 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.
  • UK Patent Pending – GB1916157.9
  • Rytons Registered Design – 6078064

Size:

  • 101mm L x 66mm H x 10mm W.

Colours:

  • Self-colour zinc.
  • Tip and overspray fire-rated RAL colour powder coating available.

Composition:

Installation:

  • Installation is fast and easy as work proceeds with the Rytweep replacing a 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:

  • Extracts from NHBC Technical Extra 25.
  • Page 14: Note: in most cases, a panel of the tested system wouldn’t contain all the components necessary to function as an external wall (for example, cavity trays, weep holes, etc.). Therefore, any additional components must achieve Class A1or A2-s1, d0.
  • Page 16: Minor components within or passing through an external wall: The aim of the regulation is to remove all combustible components from, or within, an external wall.  The majority of air bricks, weep holes, ventilation ducts, etc. can be produced from materials meeting Class A1 or A2-s1, d0, so products meeting these classifications should be used.
  • The Building Regulations Approved Document B (Fire safety) – Volume 1: Dwellings (2019 edition). Appendix B: Performance of materials, products and structures B4. NOTE: Regulation 7(2) limits components used in or on the external walls of certain buildings to materials achieving class A2-s1, d0 or class A1 (see Section 10). Assessments cannot be used to demonstrate compliance with this requirement.
  • The Building Regulations Approved Document B (Fire safety) – Volume 2: Buildings other than dwellings (2019 edition). Appendix B: Performance of materials, products and structures B4. NOTE: Regulation 7(2) limits components used in or on the external walls of certain buildings to materials achieving class A2-s1, d0 or class A1 (see Section 10). Assessments cannot be used to demonstrate compliance with this requirement.
  • Building (Scotland) technical handbook 2019: domestic. 2.7 Spread on external walls. 2.7.1 External wall cladding. Storey height more than 11m – Where the building has a storey at a height of more than 11m above the ground the external wall cladding system should be constructed of products achieving European Classification A1 or A2.
  • Building (Scotland) technical handbook 2019: non-domestic. 2.7 Spread on external walls. 2.7.2 Specified attachments. There is a risk of vertical fire spread from specified attachments to an external wall including balconies, solar panels and solar shading. Solar shading are devices attached to an external wall to reduce heat gain within a building by deflecting sunlight. Fire-fighters may not be able to apply a water jet from a fire-fighting hose directly onto a fire that has spread onto specified attachments high above the ground.
  • Where the building has a storey at a height of more than 11m above the ground, specified attachments should be constructed of products achieving European Classification A1 or A2.

Handling Information:

  • 50 per box.
  • Box size: 28cm W x 11cm H x 14.5cm D.
  • Box weight: 3kg.

Specification Paragraph: