Everdry Stepped Cavity Trays for Stonework

BBA-approved stepped cavity tray system for multi cavity options in stone wall construction of 150mm 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 natural or reconstituted stone with regular course heights, including mortar of approx. 150mm
  • On roof pitches of 7.5 degrees and above
  • Clear cavity widths of between 50mm-125mm

Add this product to your specification on NBS or SpecifiedBy

Product Information

150mm stone coursing
100mm external wall thickness (bed)

DescriptionLength50-74mm Cavity Width*75-99mm Cavity Width*100-125mm Cavity Width*
Intermediate tray RH 450mm710171037105
Intermediate tray LH450mm710271047106
Intermediate tray RH625mm711171137115
Intermediate tray LH625mm711271147116
Intermediate tray RH 1250mm712171237125
Intermediate tray LH1250mm712271247126
Stopend starter tray RH/LH450mm713171337135
Corner starter tray RH550mm714171437145
Corner starter tray LH550mm714271447146
Ridge tray450mm716171627163

*Product code to suit cavity width

150mm stone coursing
125mm external wall thickness (bed)

DescriptionLength50-74mm Cavity Width*75-99mm Cavity Width*100-125mm Cavity Width*
Intermediate tray RH 450mm710371057107
Intermediate tray LH450mm710471067108
Intermediate tray RH 625mm711371157117
Intermediate tray LH625mm711471167118
Intermediate tray RH 1250mm712371257127
Intermediate tray LH1250mm712471267128
Stopend starter tray RH/LH450mm713371357137
Corner starter tray RH550mm714371457147
Corner starter tray LH550mm714471467148
Ridge tray450mm716271637164

*Product code to suit cavity width

150mm stone coursing
150mm external wall thickness (bed)

DescriptionLength50-74mm Cavity Width*75-99mm Cavity Width*100-125mm Cavity Width*
Intermediate tray RH 450mm710571077109
Intermediate tray LH450mm710671087110
Intermediate tray RH 625mm711571177119
Intermediate tray LH625mm711671187120
Intermediate tray RH 1250mm712571277129
Intermediate tray LH1250mm712671287130
Stopend starter tray RH/LH450mm713571377139
Corner starter tray RH550mm714571477149
Corner starter tray LH550mm714671487150
Ridge tray450mm716371647165

*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 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 three lengths: 450mm for roof pitches of 25 degrees or above; 625mm for roof pitches of 17.5-22.5 degrees; 1250mm for roof pitches of 7.5-15 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. Available in black only.

Intermediate trays
Forms main tray run with one tray on each course of 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 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 150mm 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) 450mm long (roof pitches 25°+)

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