• At the abutment of a pitched roof with a cavity wall.
• On external walls (not exceeding 150 mm thickness) built from natural or reconstituted stone with regular course heights, including mortar of approx. 150 mm.
• On roof pitches of 7.5° and above.
• Clear cavity widths of 50–125 mm.

Stepped cavity tray system for multi-cavity options in stone wall construction of 150 mm course heights.

Features and benefits:

• 150 mm 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:

1. 450 mm for roof pitches of 25° or above;
2. 625 mm for roof pitches of 17.5–22.5°;
3. 1250 mm for roof pitches of 7.5–15°.

• Can be specified separately with a pre-applied polystyrene strip mortar barrier.
• Leaded version also available, consult manufacturer for details.

Quality:

• 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.