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BS 8204-1:1987

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Screeds, bases and in-situ floorings Code of practice for concrete bases and screeds to receive in-situ floorings
Available format(s)

Hardcopy , PDF

Superseded date

15-11-1999

Language(s)

English

Published date

30-10-1987

Foreword
Committees responsible
Code of practice
1. Scope
2. Definitions
3. Exchange of information and time schedule
3.1 General
3.2 Exchange of information
3.3 Time schedule
4. Materials
4.1 Cement
4.2 Aggregates
4.3 Admixtures
4.4 Reinforcement
4.5 Water
5. Design considerations
5.1 Sub-base
5.2 Base and screed construction
5.3 Base slabs
5.4 Cement and sand screeds and fine concrete screeds
5.5 Bay sizes
5.6 Joints
5.7 Use of bonding agents
5.8 Soundness of bonded and unbonded screeds
5.9 Tolerances on level and surface regularity of base
      slabs and screeds
5.10 Liability to cracking of direct finished base slabs
      and screeds
5.11 Damp proofing
5.12 Eliminating construction moisture
5.13 Admixtures
6. Work on site
6.1 Protection against the weather
6.2 High alumina cement concrete
6.3 Preparation of the base
6.4 Screed mix
6.5 Pumping the screed
6.6 Laying the screed
6.7 Finishing the base or screed
6.8 Curing the base or screed
6.9 Protection of the surface
7. Inspection and testing of bases and screeds
7.1 Inspection
7.2 Testing of the completed work
7.3 Levels and surface regularity
7.4 Determination of mix proportions of floating
      screeds
7.5 Adhesion of bonded screeds to the base
7.6 Curling and lipping of unbonded and floating
      screeds
7.7 Soundness of bonded and unbonded screeds
7.8 Soundness of floating screeds
Appendices
A. Recommended method for the assessment of levels and
     surface regularity
B. Recommended method for the determination of
     soundness of bonded and unbonded screeds
C. References
Tables
1. Concrete strength for base slabs
2. Classification of surface regularity of direct
     finished base slab or screed
3. Choice of soundness category for screeds
4. Acceptance limits for soundness test
Figures
1. Illustration of layers in a concrete ground-
     supported floor
2. Illustration of layers in a suspended concrete
     floor
3. Slip gauges for checking surface regularity
4. BRE screed tester

Recommendations for installation in respect of materials, design, work on site, and inspection and testing. Appendices cover assessment of levels and surface regularity and determination of soundness.

Committee
B/544
DevelopmentNote
PARTIALLY REPLACES CP 204: PART 2:1970. BS DRAFT 96/105291 DC REFERS TO A NEW REVISION
DocumentType
Standard
Pages
24
PublisherName
British Standards Institution
Status
Superseded
SupersededBy
Supersedes

BS 8204-5:1994 Screeds, bases and in-situ floorings Code of practice for mastic asphalt underlays and wearing surfaces
BS 8203:1996 Code of practice for installation of resilient floor coverings
BS 5385-4:1992 Wall and floor tiling Code of practice for tiling and mosaics in specific conditions
BS 8204-3:1993 Screeds, bases and in-situ floorings Code of practice for polymer modified cementitious wearing surfaces
BS 8000-9:1989 Workmanship on building sites Code of practice for cement/sand floor screeds and concrete floor toppings
BS DD230(1996) : 1996 METHOD FOR DETERMINATION OF IN SITU CRUSHING RESISTANCE OF FLOATING LEVELLING SCREEDS
BS 5385-3:1989 Wall and floor tiling Code of practice for the design and installation of ceramic floor tiles and mosaics
BS 5442-1:1989 Classification of adhesives for construction Classification of adhesives for use with flooring materials
BS 5606:1990 Guide to accuracy in building
01/122607 DC : DRAFT JULY 2001 BS 5325 - CODE OF PRACTICE FOR INSTALLATION OF TEXTILE FLOOR COVERINGS
BS 8204-4:1993 Screeds, bases and in-situ floorings Code of practice for terrazzo wearing surfaces
BS 5325:1996 Code of practice for installation of textile floor coverings

BS 5075-3:1985 Concrete admixtures Specification for superplasticizing admixtures
BS 5075-1:1982 Concrete admixtures Specification for accelerating admixtures, retarding admixtures and water reducing admixtures
BS 915-2:1972 Specification for high alumina cement Metric units
BS 5075-2:1982 Concrete admixtures Specification for air-entraining admixtures
BS 8110-1:1985 Structural use of concrete Code of practice for design and construction
BS 146-2:1973 Specification for Portland-blastfurnace cement. Metric units

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