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TECHNICAL SPECIFICATION

BE FLOORS

CONTENTS

BE 01 SCOPEBE 02 STANDARD SPECIFICATIONSBE 03 VARIATIONS AND ADDITIONS TO STANDARD SPECIFICATIONSBE 04 DETAIL OF REPAIR WORKBE 05 MEASUREMENT AND PAYMENT

BE 01 SCOPE

Floors shall mean the work to be carried out to repair materials and components such asremoval of existing floors and installation of new floor coverings, skirtings, screeds,concrete floors and paving. This specification does not include work related to metalworkand paintwork, which are specified elsewhere.

This specification covers the removal of existing floor coverings, screeds and concretesurface beds; the repair of existing floor coverings, screeds and concrete surface beds,as well as the supply, delivery and installation of new floor coverings, screeds andconcrete surface beds, for various types of buildings.

The complete scope of repair work shall as described in BE 04: Detail of repair work.

BE 02 STANDARD SPECIFICATIONS

BE 02.01 GENERAL STANDARD SPECIFICATIONS

The latest edition, including all amendments up to date of tender of the followingspecifications, publications and codes of practice shall be read in conjunction with thisspecification and shall be deemed to form part thereof:

OW 371 - Specification of Materials and Methods to be used(Fourth edition, October 1993)

SABS 281 - Hardwood block and strip flooringSABS 581 - Semi-flexible vinyl floor tiles

SABS 786 - Flexible vinyl flooringSABS 978 - Wood mosaic flooringSABS 070 - The laying of thermoplastic and similar types of flooringSABS 043 - The laying of wood floorsSABS 0186 - The laying of textile floor coveringsSABS 1449 - Ceramic wall and floor tiles

BE 02.02 ADDITIONAL SPECIFICATIONS

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Technical Specification BF: Structural concrete

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BE 03 VARIATIONS AND ADDITIONS TO STANDARD SPECIFICATIONS

BE 03.01 ADDITIONAL REQUIREMENTS FOR REPAIR OF FLOORS

BE 03.01.01 Floor coverings

Existing floors shall be inspected to determine the extent of any damaged floor areas.The existing floors and other building elements shall be protected from damage duringthe progress of any repair work and on completion shall be cleaned and handed over in aperfect condition. Only skilled workmen experienced in laying any type of floor finishesshall carry out the work.

BE 03.01.02 Preparation of floor slab and surface beds for new floor screeds

The existing concrete screed shall be removed in patches designated by theEngineer/Department's representative.

All laitance on the surface of the existing surface bed must be removed completely.Mechanised plant such as scabblers or abrasive blasters must be used. The Contractor

shall take all necessary precautions to keep dust pollution to a minimum inside the buildingduring the breaking out and removing of existing concrete screeds, as well as during thepreparation of the existing concrete surface bed.

After the mechanical cleaning of the slab surface to expose the coarse aggregate, alldust and debris must be removed, and the surface must be thoroughly wetted and keptwet for at least 12 hours before application of the new concrete screed.

BE 03.01.03 Surface preparation of existing floor screeds for new floor coverings

The following procedure is suggested where vinyl tiles were laid with bitumen adhesive:

(a) The Engineer/Department's representative will indicate the area where existing

vinyl tiles are to be removed.

(b) The bitumen must be removed mechanically and/or chemically. Remove as muchbitumen and other contamination as possible by scraping. Bitumen can be heatedto soften it.

(c) Sweep or vacuum sub-floor thoroughly to remove dust and grit.

(d) An approved solvent based degreasing and cleaning compound can be used toremove the bitumen chemically. The Contractor shall ensure the safety of theworkers and the building against possible fire.

(e) The concrete surface must be smooth. Even the surface with Pavelite or approved

equivalent before laying the new vinyl tiles. The Pavelite must be applied inaccordance with the manufacturers specifications.

(f) Vacuum clean the floor surface again before the adhesive is applied to lay the vinyltiles.