METHODOLOGY / PROCEDURE OF EXTERNAL PAINTING

WORK METHODOLOGY / PROCEDURE OF EXTERNAL PAINTING

A.   Surface Preparation

 

Ø  For external painting work at height, suitable arrangement shall be provided as per approval of safety team.

Ø  Provided gondola, scaffolding shall be inspected with Safety officer prior to usage.

Ø  Cleaning of RCC surface shall be done where external painting to be done.

Ø  Efflorescence, chalk, dust, dirt, grease and oils shall be removed by using of sanding or scraping.

Ø  The surface of the area to be painted would be prepared by removing loose particles, blemishes and deleterious materials by way of scraping.

Ø  Any surface defects on RCC shall be repaired as per RCC repairing Procedure.

Ø  All tie patti or tie rod hole shall be filled with non-shrink grout materials.

Ø  All clearance will be obtained before starting of External painting activities.

Ø  Slope at required location to be maintained to avoid water stagnant. like; at window sill, etc.

Ø  Repairing shall be done as per approved procedure and approved material.

Ø  All external groves shall be maintained properly as per drawing.

Ø  All MEP items shall be protected before starting of Painting activities.

 

B.   Application of Two Coat Putty

 

Ø  Proper scraping shall be done on RCC surface by using of scraper patti.

Ø  Approved filling putty / coarse putty shall be applied uniformly on RCC / by using of flat bladed plate or large putty knives with one in each hand.

Ø  Thickness of filling putty / coarse putty shall be of approx. 02 to 03 mm  or as recommended by manufacture.

Ø  Applied putty shall be allowed to dry at least for 6 hrs. or as per technical data sheet.

Ø  After drying of filling putty, second coat  fine putty shall be applied.

Ø  Thickness of fine putty shall be of approx. 0.5 to 0.8 mm or as recommended by manufacture.

Ø  Once the fine putty is fully applied and surface shall be allowed for drying for a minimum period of 8 hrs.

 

C.   Application of Texture

 

Ø  Approved Primer shall be applied on putty surface if required.

Ø  Primer shall be applied if time period is exceeded more than 10 days of application of Wall Putty or as per manufacturer guideline.

Ø  One coat texture shall be applied at least after 4 to 6 hrs. of primer application if Primer is applicable. Else texture will be applied after 8 to 10 hrs of wall putty application.

Ø  Minimum time gap between Asian wall putty and texture shall be 8 to 10hrs or as per manufacturer guideline.

Ø  Thickness of texture shall be of approx. 0.5 to 1.0 mm or as per project specification.

Ø  Texture coat shall be applied by using of roller brush or as per manufacturer guideline.

Ø  After application of texture, surface shall be allowed for air drying for a period of at least 10 to 12 hrs. or as per manufacturer recommendation.

 

D.   Application of Two Coat Paint                                                                                           

 

Ø  The surface to be painted shall be free from any loose paint, dust and oil & grease.

Ø  Any visible surface cracks shall be repaired prior to start of painting.

Ø  Two coat of approved paint  shall be applied after 10 to 12hrs of Putty application.

Ø  Primer shall be applied if time period is exceeded more than 10 days of application of texture or as per manufacturer guideline.

Ø  First coat paint shall be applied as per the approved RAL colour code.

Ø  Applied first coat paint shall be allowed to dry at least for 4 to 6 hrs as per manufacturer’s recommendation.

Ø  After drying of first coat paint second coat paint shall be applied as per the approved RAL colour code.

Ø  Cleaning of MEP items shall be done after completion of external painting.

 

External Paint system:

1 coat Coarse Putty / filling putty + 1 Coat fine putty + Texture + 2 coat Paint