50948-RHN Putney. 06 January This document includes: F30. Accessories/ sundry items for brick/ block/ stone walling. Code Section Revision Dated

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1 50948-RHN Putney 06 January 2018 This document includes: Code Section Revision Dated F30 Accessories/ sundry items for brick/ block/ stone walling 1

2 Table of Contents Title F30 Accessories/ sundry items for brick/ block/ stone walling Page 3

3 F30 Accessories/ sundry items for brick/ block/ stone walling To be read with Preliminaries/ General conditions. CAVITIES 120 CLEANLINESS Cavity base and faces, ties, insulation and exposed dpcs: Free from mortar and debris. 132A PERPEND JOINT PLASTICS WEEP HOLES Above new openings. Manufacturer: Cavity Trays Ltd. - Web: enquiries@cavitytrays.co.uk. - Product reference: Small Weep Vent or similar and approved. - Colour: Terracotta or clear TBC to match existing and new mortar colour. Locations: Through outer leaf immediately above base of cavity, at cavity trays, stepped dpcs and external openings. 75 mm above top of cavity fill at base of cavity. Provision: At not greater than 1000 mm centres and not less than two over each opening. Additional requirements: Weep holes to be fitted with new cavity trays as per clause 345A above new opening in existing walls. 155A PARTIAL FILL CAVITY INSULATION TO INFILLED WINDOW Insulation: Rock wool batts BS EN and ISO14001: Product certification: British Board of Agrement (BBA) Certificate number Manufacturer: Rockwool Limited, Pencoed, Bridgend, CF35 6NY - info@rockwool.co.uk - Web: - Product reference: HP Partial Fill Cavity Slab. Face size (length x width): 1200 x 455 mm to suit a vertical wall tie spacing of 450mm. Thickness (nominal): 50 mm. Thermal conductivity: W/(m.K). Reaction to fire class: A1. Additional requirements: Slab to be fixed with robust (patterned) face outward. Placement: Secure against face of inner leaf. - Residual cavity: Clear and unobstructed. Joints between boards, at closures and penetrations: No gaps and free from mortar and debris. EXISTING WALL CONSTRUCTION TO BE REVIEWED UPON STRIP OUT OF WINDOW TO ENSURE CAVITY ALLOWS FOR 50mm PARTIAL FILL INSULATION. DO NOT FULL FILL CAVITY WITH THIS PRODUCT - CONTACT ARCHITECT FOR MORE DETAIL IF CAVITY DOES NOT ALLOW FOR PARTIAL FILL. 180A CAVITY CLOSERS TO NEW DOOR & WINDOW LOCATIONS IN EXISTING CONSTRUCTION Manufacturer: Cavity Trays Ltd. - Web: enquiries@cavitytrays.co.uk. - Product reference: Type V Cavicloser or similar approved. - Length: 3m - Size to suit cavity Accessories: To include integral dpc and insulation. Cavity closer to be tied to both inner and outer leaves of cavity wall. Page 3 of 6

4 REINFORCING/ FIXING ACCESSORIES 215A CAVITY WALL TIES USED WITH PARTIAL FILL INSULATION TO WINDOW INFILL Standard: To BS EN Type: 1 (Masonry heavy duty). Manufacturer: Ancon Building Products. - Web: - Tel: Product reference: ST1 Wall Tie or similar and approved. Material/ finish: Stainless steel grade (304). Sizes: 200 mm. Design embedment length (minimum): 50 mm. Additional requirements: Tie mounted insulation retaining clips: As recommended by the manufacturer. Tie mounted insulation retaining clips: As recommended by the manufacturer. 241A WALL STARTERS/ CONNECTORS TO NEW MASONRY INFILL Manufacturer: Ancon Building Products. - Web: info@ancon.co.uk.. - Product reference: SPB Frame Cramp Tie or similar and approved. Sizes: 100mm. Installed as per manufacturers instructions. FLEXIBLE DAMP PROOF COURSES/ CAVITY TRAYS 345A SITE FORMED FLEXIBLE SHEET CAVITY TRAYS Above new openings Material: Co-polymer thermoplastic (CPT). Manufacturer: Visqueen Building Products. - Web: enquiries@visqueenbuilding.co.uk.. - Product reference: Zedex CPT High Performance Damp Proof Course or similar and approved. - Width: refer to architects details - Cavity trays to be installed on top of lintels as specified by Structural Engineers. - Cavity trays to be surface fixed to inner leaf of existing wall. The surface should be primed, the DPC then bonded to the inner leaf using Visqueen Zedex DPC Fixing Pins at 150mm intervals. All brick, stone or blockwork where a cavity is formed requires a twodimensional linear run of cavity tray formed on site to prevent water ingress to the internal skin. To include all openings, shelf angles, head restraints and where a high level wall is built above a flat or sloping roof. - Preparation/Installation: Ensure Zedex CPT DPC is installed following good practice set out in BS 5628: Part 3: All cavity trays must be laid on an even bed of wet mortar in both internal and external walls or alternatively face-fixed to the internal leaf using Zedex DPC Fixing Strip & Pins (Grey Fixing Pins for masonry/ Black Fixing Pins for RUF insulation) and laid in the external mortar bed. All lap joints in the cavity tray must have 100mm overlap and be completely sealed using Zedex DPC Jointing Tape. All changes in direction and/ or level require the application of a Visqueen Preformed Unit. Ensure all joints between Preformed Unit and Zedex CPT DPC are sealed as above. Complete all work strictly in accordance with Agrément Certificate 94/ The jointing tape to be used to seal all DPC/Cavity tray/dpm joints. Page 4 of 6

5 360A GAS RESISTANT DPCS/ CAVITY TRAYS Manufacturer: Visqueen Building Products. - Web: riba@visqueenbuilding.co.uk.. - Product reference: Zedex High Bond DPC or similar approved. DPC to be torch bonded to primed block and concrete surface as manufacturer's recommendations. 390 SITE FORMED DPC/ CAVITY TRAY JUNCTIONS/ STOP ENDS Three dimensional changes in shape: Form to provide a free draining and watertight installation. Seal laps. Alternative use of preformed junction cloaks/ stop ends: Submit proposals. INSTALLATION OF DPCS/ CAVITY TRAYS 400 COLD WEATHER WORKING Zedex CPT High Performance DPC is unaffected by cold weather working however store Zedex DPC Jointing Tape in a warm location prior to use. 415 HORIZONTAL DPCS Placement: In continuous lengths on full even bed of fresh mortar, with 100 mm laps at joints and full laps at angles. Width: At least full width of leaf unless otherwise specified. Edges of dpc not covered with mortar or projecting into cavity. Overlying construction: Immediately cover with full even bed of mortar to receive next masonry course. Overall finished joint thickness: As close to normal as practicable. 425A GROUND LEVEL DPCS Joint with existing damp proof membrane: Continuous and effectively sealed. Contact architect if existing DPC is not found 445 SILL DPCS Form and placement: In one piece and turned up at back when sill is in contact with inner leaf. 455 COPING/ CAPPING DPCS Placement: Bed in one operation to ensure maximum bond between masonry units, mortar and dpc. Dpcs crossing cavity: Provide rigid support to prevent sagging. 465 SEALING DPCS GENERALLY Overlaps and junctions: Seal with Adhesive recommended by dpc manufacturer. 475 SITE FORMED CAVITY TRAYS Requirements to prevent downward ingress of water: - Profiles: To match those shown on drawings. Firmly secured. - Joint treatment: Use unjointed wherever possible, otherwise lap at least 100 mm and seal to produce a free draining and watertight installation. - Horizontal cavity trays: Support using cavity closer. - Sloping cavity trays: Prevent sagging. - Cleanliness: Free from debris and mortar droppings. 485 CAVITY TRAYS OVER OPENINGS AND OTHER CAVITY BRIDGINGS Length: To extend not less than 150 mm beyond ends of lintels/ bridgings. Page 5 of 6

6 515 DPC/ CAVITY TRAY LEADING EDGE IN FACEWORK - FLUSH Treatment at face of masonry: Finish flush and clear of mortar at the following locations: At window and door heads to openings in existing construction. 560 VERTICAL DPCS GENERALLY Form: In one piece wherever possible. - Joints: Upper part overlapping lower not less than 100 mm. 570 JAMB DPCS AT OPENINGS Joint with cavity tray/ lintel at head: Full underlap. Joint with sill/ horizontal dpc at base: Full overlap. Projection into cavity: Not less than 25 mm. Relationship with frame: In full contact. JOINTS 650 POINTING IN FLASHINGS Joint preparation: Free of debris and lightly wetted. Pointing mortar: As for adjacent walling. Placement: Fill joint and finish flush. PROPRIETARY SILLS/ LINTELS/ COPINGS/ DRESSINGS 735A PRECAST CONCRETE LINTELS Standard: To BS EN Manufacturer: As structural engineers drawings. - Product reference: As structural engineers drawings. Types: As structural engineers drawings. Sizes: As structural engineers drawings Additional requirements: Temporary prop existing brick/blockwork during demolition of existing. Placement: Bed on mortar used for adjacent work. - Bearing length (minimum): As structural engineers drawings. 755A PREFABRICATED STEEL LINTELS Standard: To BS EN Manufacturer: As structural engineers drawings. - Product reference: As structural engineers drawings. Types: As structural engineers drawings. Material/ finish: As structural engineers drawings. Sizes: As structural engineers drawings. Additional requirements: Temporary prop existing brick/blockwork during demolition of existing. Placement: Bed on mortar used for adjacent work. - Bearing length (minimum): As structural engineers drawings. MISCELLANEOUS ITEMS 840 OPENINGS FOR FRAMES Formation: Use accurate, rigid templates to required size. Page 6 of 6