Gypsum plaster is highly recommended by Architects due to its many advantages as an alternative to conventional cement sand plastering methods. It’s a white material consist of calcium sulphate. lightweight aggregate which is characterized by low density, high thermal insulation, and sound absorption properties. Other additions may be incorporated to impart desired properties.
This post explains the necessary Inspections and testing during gypsum plaster of internal walls, ceilings, etc. This is only a summary and a full customizable ITP with the required checklist in word format can be downloaded from the link given at the bottom.
WHAT IS AN INSPECTION AND TEST PLAN OR ITP
Inspection and Test plans and checklists are an integral part of quality management systems not only in construction but in almost every industry where Quality Management systems are in place. It is considered to be master documents through which different parameters and actions of a process or activity would be monitored and recorded which play a vital part during the verification later or in simple terms during auditing.
In the construction industry, where there are a lot of activities, for a variety of trades such as structural, Finishes, Façade, Electrical, Mechanical, Plumbing, etc. are to be completed spanning across excavation for the foundation to handing over the stage, thereby Preparation and implementation of different inspection test plans form the most crucial part of the project management system.
To read more about ITP and how to prepare one CLICK HERE and refer to the last picture in this post to get a quick understanding of ITP’s structure and how to structure it as per the project requirements
Inspection and Test Plan For Gypsum Plaster Work
SECTION 1 – DOCUMENTATION REVIEW
This part deals with the review and approval requirements of necessary documents pertaining to the plastering works. These shall be mainly drawings showing the finished schedule, materials (cement, sand, metal laths, or accessories) as detailed in the project specifications or the standards mentioned in the contract, Method Statement mainly.
SECTION 2 – INSPECTION OF INCOMING MATERIALS
This part deals with the inspection of materials procuring for the plastering activity based on the approved material details. The storage of materials also shall be checked whether it is followed the guidelines or standards applicable.
SECTION 3 – PRE WORK INSPECTION (INSPECTION PRIOR TO START PLASTERING)
Pre-Gypsum plaster work inspection is important as there are many aspects that shall be checked. Some project owners or consultants will insist to make a sample of plastering to be applied on a small area – this may be separate for the separate bases like plastering on blockwork, plastering on a concrete surface, etc. The workmanship, the finish, etc will be assessed before proceeding with the work on site. Once the sample is approved it shall be kept as a reference and will be marked for the same.
The first point is the Check on the surface of Block works or concreting for plastering – The approval of the finished blockwork is mandatory before proceeding with it. All joints to be raked.
The rest of the points during pre plastering inspection are
|Check on Block works for Gypsum Plaster plaster works|
|Check on concrete surface for plastering.|
|Check on plastering guide spot/dabs|
|Check on chicken mesh/metal laths|
|Check on scaffolding|
|Check on surface for plastering|
|Check for number of coats and thickness|
|Protection of Adjacent Work|
|Check for MEP clearance of area|
SECTION 4 – WOK IN PROGRESS INSPECTION
This section includes the testing and inspection of
|Check for mixing of gypsum plaster.|
|Check on use of mixed mortar|
|Check during application|
|Check on control / expansion joints|
|Check for finishing|
SECTION 5 – POST WORK INSPECTIONS
Curing is to be monitored after the plastering for as many days as specified, 7 days minimum as per the IS 1661. When the plastered surface is offered for inspection it shall be checked for plumb, straightness, square, crack, and overall smoothness of the wall. The maximum deviation allowed as per IS clause is 4mm with a straight edge of 2 meters at any level
Refer to the picture at last to learn tips on How to Customize the ITP based on Project Requirements