Everdry Stepped Cavity Trays for Blockwork/Stonework

BBA-approved stepped cavity tray system for blockwork or stonework construction of 225mm coursing heights.

Everdry preformed cavity trays are a range of DPC products for installation at the abutment of a pitched roof with a cavity wall to prevent water penetration. All Everdry cavity tray components are designed to comply fully with the requirements set out in Building Regulations, British Standards and the NHBC.


  • At the abutment of a pitched roof with a cavity wall
  • On external walls – not exceeding 150mm thickness – built from blockwork or stone with regular course heights, including mortar of approx. 225mm
  • On roof pitches of 12.5 degrees and above
  • Clear cavity widths of between 50mm-125mm

Add this product to your specification on NBS or SpecifiedBy

Product Information

225mm block/stone coursing
100mm external wall thickness (bed)

DescriptionLength50-74mm Cavity Width*75-99mm Cavity Width*100-125mm Cavity Width*
Intermediate tray RH 625mm720172037205
Intermediate tray LH625mm720272047206
Intermediate tray RH 1250mm721172137215
Intermediate tray LH1250mm721272147216
Stopend starter tray RH/LH450mm723172337235
Corner starter tray RH550mm724172437245
Corner starter tray LH550mm724272447246
Ridge tray625mm726172627263

*Product code to suit cavity width

225mm block/stone coursing
125mm external wall thickness (bed)

DescriptionLength50-74mm Cavity Width*75-99mm Cavity Width*100-125mm Cavity Width*
Intermediate tray RH 625mm720372057207
Intermediate tray LH625mm720472067208
Intermediate tray RH 1250mm721372157217
Intermediate tray LH1250mm721472167218
Stopend starter tray RH/LH450mm723372357237
Corner starter tray RH550mm724372457247
Corner starter tray LH550mm724472467248
Ridge tray625mm726272637264

*Product code to suit cavity width

225mm block/stone coursing
150mm external wall thickness (bed)

DescriptionLength50-74mm Cavity Width*75-99mm Cavity Width*100-125mm Cavity Width*
Intermediate tray RH 625mm720572077209
Intermediate tray LH625mm720672087210
Intermediate tray RH1250mm721572177219
Intermediate tray LH1250mm721672187220
Stopend starter tray RH/LH450mm723572377239
Corner starter tray RH550mm724572477249
Corner starter tray LH550mm724672487250
Ridge tray625mm726372647265

*Product code to suit cavity width Trays to suit clear cavity widths of 126mm+ and 151mm external wall thickness can be made to order. For trays featuring the polystyrene strip mortar barrier insert ‘P’ at the end of the required product code. This may incur additional charge.

  • 150mm high back upstand exceeds minimum requirements
  • Permanent stopend protects the perpendicular joint and cuts out water backtracking along the blockwork/stonework
  • Angled section between cavity tray base and rear upstand automatically sheds water to the outer leaf Cavity tray builds into the outer leaf only to speed up installation and allow both inner and outer leafs to be built independently if required
  • Choice of two lengths: 625mm for roof pitches of 25 degrees or above; 1250mm for roof pitches of 12.5-22.5 degrees
  • The system is available on request with pre-applied polystyrene strips
  • Polystyrene is much easier to rake out than mortar and offers a visual locator of the cavity tray so aiding the installation of post fitted lead work (this service may incur additional charge)
  • BBA Approved
  • Satisfies all NHBC requirements
  • Manufactured to BS EN ISO 9001 and BS EN ISO 14001
  • Complies with all relevant Building Regulations
  • Meets all relevant British Standards
  • All products are vacuum formed in 2.0mm thick medium density polyethylene – virtually indestructible.

Intermediate trays
Forms main tray run with one tray on each course of blockwork/stonework running the full length of the abutting roof slope.

Stopend starter trays
Suits all roof pitches – first component to be installed and fitted at the lowest point on a standard abutment. It collects water gathered by the rest of the system and discharges it from the wall through a weep hole.

Corner starter trays
Suits all roof pitches – has same function as stopend starter tray but is used where the abutting roof comes up to, or beyond, the corner of the main building. Designed to return around the corner of the building to provide complete protection.

Ridge trays
Suits all roof pitches – used where a right hand and left-hand roof slope come together at an apex to straddle the top two intermediate trays.

  • Each length of tray is available with a variety of base widths to suit different wall thicknesses and cavity width combinations. Wall thicknesses of either 100mm, 125mm or 150mm can be accommodated as well as cavity widths of 50-74mm, 75-99mm and 100-125mm – make sure you select the correct width for the project in hand.
  • Weep holes can be formed by simply installing a purpose made Timloc plastic wall weep unit (product 1143/Invisiweep).
  • In areas of severe weather exposure or where particularly porous facing stonework is used, it is strongly recommended that extra weep holes are provided at intermediate points along the run of cavity trays.
  • Many components come in left or right-handed versions. Handing is dictated by the direction of the abutting roof slope – e.g. left handed trays are used on left handed roof slopes. Establish the correct handings or it will be impossible to fit the cavity trays properly.
  • With pre-formed cavity trays such as Everdry it is not strictly necessary for the cavity tray to span all the way across the cavity. As long as the cavity tray stands back from the rear face of the stone and projects back into the cavity far enough to intercept drips falling from the wall ties, then it will perform effectively
  • To calculate quantities, allow one cavity tray per course on each roof slope. One stopend starter or corner starter is needed per roof slope, and one ridge tray at each apex.
  • Check roof pitch and select the correct length of tray to suit it. Make sure correct handing is selected to suit the direction of each roof slope.
  • Always state cavity width, roof pitch, coursing height and wall thickness to ensure correct goods are despatched.

F30 Accessories/sundry items for brick/block/stone walling


  • Manufacturer: Timloc Building Products, Timloc House, Ozone Park, Howden, East Yorkshire, DN14 7SD. T: 01405 765567 W: www.timloc.co.uk
  • Type(s) and location(s): Cavity tray to be installed into 225mm stonework over stepped/sloping roof abutments on new build and remedial work applications.
  • Build in carefully in accordance with manufacturer’s recommendations to ensure a fully watertight installation.
  • Cavity width
  • External wall thickness
  • Roof pitch
  • Reference e.g. Intermediate Tray (RH) 625mm long (roof pitches 25°+)

Stepped cavity trays sloping measurement

Roof pitchCoursing height 74mm brick

Stepped cavity trays horizontal measurement

Roof pitchCourse height 75mm brick

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