BS 6229:2003
$167.15
Flat roofs with continuously supported coverings. Code of practice
| Published By | Publication Date | Number of Pages |
| BSI | 2003 | 42 |
This code of practice gives recommendations on the design and application of flat roofs with continuously supported roof coverings. It covers weathertightness, drainage, thermal design, sound insulation, condensation control, structural support, fire precautions, maintenance and repair. The recommendations are applicable to terraces, podia, parking decks and green/garden roofs; however these particular types of roof also require consideration of additional factors, beyond the scope of this code of practice.
This code of practice is applicable to roof coverings at a pitch not greater than 10° to the horizontal.
NOTE Provided that the design conditions are similar, the recommendations given in this code may also be applied to roofs with slopes greater than 10°, but for steep roofs many of the recommendations may not apply.
This code of practice does not apply to roofs with self-supporting coverings, cold stores and high temperature enclosures, or to slated or tiled roofs.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | BRITISH STANDARD |
| 2 | Committees responsible for this British�Standard |
| 3 | Contents |
| 5 | 1 Scope 2 Normative references |
| 8 | 3 Terms and definitions 3.1 flat roof 3.2 condensation 3.3 interstitial condensation 3.4 surface condensation 3.5 harmful condensation 3.6 cricket 3.7 tapered insulation 3.8 thermal bridge 3.9 vapour control layer (VCL) |
| 9 | 3.10 waterproofing system 4 Types of flat roof 4.1 General 4.2 Principal types |
| 11 | 4.3 Other types |
| 12 | 5 Materials and components 5.1 General 5.2 Roof coverings Table 1 Materials for roof coverings |
| 13 | 5.3 Structural deck Table 2 Structural deck materials |
| 14 | 5.4 Screeds Table 3 Sc reed materials 5.5 Thermal insulation materials Table 4 Thermal insulation materials |
| 15 | 5.6 Vapour control layers (VCLs) Table 5 Vapour control layers 5.7 Roof surface protection 5.8 Rooflights 5.9 Rainwater goods 5.10 Lightning conductors 5.11 Handrails and balustrades 6 General design considerations |
| 16 | 7 Falls and drainage 7.1 General |
| 17 | 7.2 Minimum finished falls Table 6 Minimum finished falls 7.3 Design falls 7.4 Direction of falls |
| 18 | 7.5 Formation of falls 8 Structural design 8.1 Loading |
| 19 | 8.2 Strength and stiffness 8.3 Movement Table 7 Approximate thermal and moisture movements of certain structural deck materials |
| 20 | 8.4 Protection against trapped moisture |
| 21 | 9 Thermal design 9.1 General 9.2 Thermal conductivity 9.3 Thermal bridges 9.4 Thermal mass |
| 22 | 9.5 Choice of insulating materials 9.6 Positioning of thermal insulation |
| 23 | 10 Control of condensation 10.1 General considerations 10.2 Design considerations |
| 24 | 10.3 Types of roofs in relation to interstitial condensation 10.4 Condensation at thermal bridges |
| 25 | 11 Sound insulation 11.1 General 11.2 Sound insulation across the roof Approximate sound insulation values for typical flat roofs 11.3 Sound insulation along the roof |
| 26 | 11.4 Sound absorption 12 Fire precautions 12.1 General 12.2 Insurance |
| 27 | 12.3 Internal fire |
| 28 | 13 Surface protection 13.1 Solar protection 13.2 Damage from traffic 13.3 Inverted roofs 14 Rooflighting 14.1 General |
| 29 | 14.2 Daylighting recommendations 14.3 Weathertightness 14.4 Thermal insulation 14.5 Condensation 14.6 Fire precautions 14.7 Sound insulation 14.8 Safety considerations |
| 30 | 15 Roof plant, equipment and fixtures |
| 31 | 16 Security 17 Durability of roof coverings 18 Maintenance and repair 18.1 Maintenance 18.2 Repair 19 Refurbishment and renewal 20 Safety |
| 32 | Annex A (informative) Control of condensation in warm and inverted roofs A.1 Design objective A.2 Design procedure A.2.1 General A.2.2 Determine the appropriate indoor and outdoor climate conditions to be adopted for design A.2.3 Control the risk of interstitial condensation |
| 33 | A.3 Design standards A.3.1 Outdoor climate Table A.1 Outdoor notional psychrometric conditions for flat roof design A.3.2 Indoor climate Table A.2 Notional indoor psychrometric conditions for flat roof design A.3.3 Condensate retention A.4 Vapour resistance |
| 34 | Annex B (normative) Maintenance B.1 Maintenance manual B.2 Inspection B.3 Inspection procedure |
| 35 | B.4 Maintenance guidelines for inspection B.5 Recommendations — Summary Annex C (normative) Refurbishment and renewal C.1 Refurbishment C.1.1 General |
| 36 | C.1.2 Refurbishment — Overlays C.2 Renewals Annex D (informative) Construction (Design and Management) (CDM) Regulations 1994 D.1 General |
| 37 | D.2 Clients D.3 Designers D.4 The planning supervisor D.5 The principal contractor |
| 38 | D.6 Roofing contractors D.7 Specific risks associated with roofing work |
