IS 2402 (1963): Code of Practice for External Rendered Finishes

[Pages:44]

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IS 2402 (1963): Code of Practice for External Rendered Finishes [CED 5: Flooring, Wall Finishing and Roofing]

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( Reaffirmed 2001 )

Indian Standard

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CODE OF PRACTICE FOR !,$:1c+'63

EXTERNAL RENDERED FINIS~.~`U~-..,%:._:

Concrete, Plaster and Tiled Finishes Sectional Committee, BDC 8

Chairman

Representing

SHRI M. S. BHATIA Members

Central Public Works\ Department

SHRI J. G. BODHE

K.R. Irani & Co., Bombay

SHRI S. K. BOSE

Government Test House, Calcutta

SHRI E. K. RAMCHANDRAN ( Alternote )

DEPUTY DIRECTOR ( ARCRITEC- Railway Board ( Ministry of Railways )

TURE ), RDSO

SRRI M. K. JADHAV

Buildings $ Communications Department, PWD,

Government of Maharashtra

SHRI S. C. KAPOOR

Modern Tiles & Marble, New Delhi

SHRI A. C. KAPOOR ( Alternate )

SHRI L. 5. KUMAWAT

Engineer-in-Chief's Branch, Army Headquarters

SHRI HAZARI LAL MARWAH

Central Builders' Association, New Delhi

SHRI T. R. MEHANDRU

The Institution of Engineers ( India )

SHRI S. J. NARWEKAR

Narwekar & Narwekar, Bombay

SHRI M. H. PANDYA

Central Building Research Institute ( CSIR ),

Roorkee

SERI R. D. SRIVASTAVA ( Alternate )

&RI J. L. SEH~AL

National Buildings Organisation

(Ministry of

Works Housing & Rehabilitation )

SHRI G. C. SHARMA

Indian Insiitute of Architects, Bombay

SHRI B. SHIRAZI

Cole Paints & Contracts Private Ltd., Bombay

SHRIMATI T. P. SIDRWA

Bharat Tiles and Marbles Private Ltd., Bombay

SKRI R. D. SIDHWA ( Alternate )

SUPERINTENDING ENGINEER Public Works Department, Madras

( PLANNING & DESIGNS )

EXECUTIVE ENGINEER (Bum-

DINS CENTRE ) ( Alternate )

SUPERINTENDINU ENGINEER Central Public Works Department

( II CIRCLE )

SHRI K. V. THADANEY

The Concrete Association of India, Bombay

&RI R. R. GORE ( Alternate )

DR. H. C. VISVESVARAYA,

Director, IS1 ( Ex-officio Member )

Deputy Director (Bldg)

Secretaries Sam S. P. RAMAN Assistant Director ( Bldg ), IS1

SHRI Y. R. TANEJA

Extra Assistant Director ( Bldg ), IS1

( Continued on pale 2 i

INDIAN STANDARDS INSTITUTION MANAK BHAVAN, 9 MATHURA ROAD

NEW DELHI 1

IS:2402- 1963

(Continuedfrom page 1 )

Plaster and Allied Finishes Subcommittee, BDC 8 : 3

Convener SHRI K. V. THADANEY

Representing The Concrete Association of India, Bombay

Members

SHRI C. V. NAZARETH (Alternate to

Shri K. V. Thadaney )

SHRI J. G. RODHE

K.R. Irani & Co., Bombay

SHRI D. D. BORKER

Engineer-in-Chief's Branch, Army Headquarters

SERI M. K. JADEAV

Buildings & Communications Department, PWD,

Government of Maharashtra

SHRI B. P. KAPADIA

The Hindustan Construction Co. Ltd., Bombay

SHRI T. R. ME~ANDRU

The Institution of Engineers ( India )

SHRI S. J. NARWE~AR

Narwekar BENarweknr, Bombay

SHIU B. SHIRAZI

Cole Paints and Contracts Private Ltd., Bombay

SIJPERINTENDINQENGINEER

Central Pnblio Works Department

S2: FF.%!.ADANI

Defence Production Organization (Ministry of Defence )

2

CONTENTS

IS: 2402-1963

PAGE

0. FOREWORD ...............

5

1. SCOPE

............

... 6

2. TERMINOLOGY

.........

... 6

3. NECESSARY INFORMATION

.........

12

4. MATERIALS, TOOLS AND ACCESSORIES

......

13

5. CARE OF MATERIALS, TOOLS AND ACCESSORIES......

14

6. DESIGN CONSIDERATIONS

.........

16

6.1 Functions of External Renderings

......

16

6.2 Suitability of Various Types of Rendered Finishes ...

16

6.3 Nature of Background in Relation to Choice of

Rendering

...

...

......

18

6.4 Resistance to Water Penetration

......

18

6.5 Durability

............

20

6.6 Resistance to Cracking

.........

22

6.7 Resistance to Crazing

..........

23

6.8 Thermal Properties

.........

23

6.9 Sound Insulation ( Air-Borne Sound ) ......

23

6.10 Fire Resistance and Combustibility

......

23

6.11 Recommended Mix Proportions

......

23

6.12 Number of Coats ............

26

6.13 Functions of Different Coats and their Recommended

Thicknesses

.........

... 26

6.14 Colour ...............

26

7. PRELIMINARY WORK

............

27

7.1 Scaffolding

............

7.2 Cleanliness 7.3 Preparation 7.4 Preparation

and Protection of Adjacent

of Mortar Mix .........

of Background

.........

Work

27 ... 27

28 29

7.5 Fixing Metal Lathing or Expanded Metal as a Back-

ground

............

32

3

PAGE

8. APPLICATIONOF RENDERINGCOATS. . .

,..

8.1 General

. . .

. . .

...

8.2 First Undercoat . . .

. . .

...

8.3 Subsequent Undercoat

. . .

...

8.4 Plain Finishing Coats

. . .

...

8.5 Scraped or Textured Finishing Coats ...

8.6 Roughcast Finish . . .

.,.

...

8.7 Dry-dash Finish . . .

. . .

...

8.8 Machine-Applied Finishes . . .

...

8.9 Architectural Features

. . .

...

. . . 32

... 32 ... 33 ... 33 ... 34 ... 34 ... 34 ... 34 ... 31 ... 34

9. CURING

.........

...

... 35

10. MAINTENANCE

......

...

... 35

11. REPAIR OF DAMAGEDAREAS

. . .

...

... 36

APPENDIX A MEASURESTO OVERCOMETHE EFFECTSOF SOLUBLE

SULPHATESFROMBACKGROUNDSON RENDERINGS. . .

38

TABLE I

SUITABILITYOF THE VARIOUS METHODSOF FINISHING

RENDERINGSFORVARIOUSCONDITIONS. . .

. . . 17

TABLE II BACKGROUNDSFORRENDERINGS

. . .

. . . 19

TABLE III RECOMMENDEDMIXES FOR EXTERNALRENDERINGSIN

RELATION TO BACKGROUND MATERIAL, EXPOSURE

CONDITIONSAND FINISHDESIRED

. . .

. . . 24

4

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