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Advantages of using Gypsum plaster vs Sand Cement plaster

Advantages of using Gypsum plaster vs Sand Cement plaster

08.06.2017

Selecting the right material and methodology to finish internal walls is the key towards achieving the best in quality finish while achieving desired performance.

The options available for internal plastering are:

  • Conventional sand cement plaster

  • POP (basic stucco product)

  • Gypsum Plaster (formulated POP plaster)

Comparison against various attributes

 

Sand Cement Plaster vs Gypsum Plaster

Also consider the fact that non-availability of river sand significantly increases the prices while also impeding the construction speed.

Compare this with use of Gypsum plaster, which are completely recyclable and hence pose no threat to the environment. Gypsum plaster main constituent is Plaster Of Paris or POP(stucco) which is obtained after heating the gypsum rock. Upon addition of water it goes back to its original form providing required strength.

 

  • Water, a critical resource: Sand Cement plaster require at least 7 days of water curing. According to this article an average of 0.44 gm of water is required for curing per gm of cement. Water is slowly becoming a very valuable resource and the amount of water saved in curing can have a significant impact on your cost.Compare this with Gypsum plaster which doesn’t require any water curing thus saving you the time of waiting for further work while also saving money.

  • Shrinkage Cracks: You may have observed shrinkage cracks on a Sand Cement plastered surface. It occurs because of the heat of hydration released during drying of sand cement plaster leading to hairline cracks formation in medium term (8-10 months) Gypsum plaster doesn’t have any heat of hydration and hence doesn’t have any crack formation*.

  • Application Methodology: Plaster Mortar needs to be mixed in 1: 4 (Cement : Sand ) proportions. Ensuring appropriate mix is a big challenge. While mixing of material there is a high probability of contamination, loss of cement paste, and incorrect water cement ratio. Gypsum Plaster needs to be mixed with water and can be applied directly to any surface (bricks, blocks and RCC) thus providing you with uniform mixture for the whole construction time giving you control over quality.

  • Setting Time: Sand Cement Plaster requires at least fifteen days for plaster to set and attain full strength; this includes drying time of sand cement plaster post adequate curing. Sand screening is also a major challenge at construction site. Gypsum plaster sets within 30 minutes, attains full strength in 78 hours.

  • Final finish: Final finish of sand cement plaster is rough, coarse and requires to be further finished to make it line leveled and smooth enough to receive paint over it.With Gypsum Plaster the surface is already line and leveled, and is smooth enough to receive paint over it.

Cost comparison Gypsum plaster vs Sand Cement plaster

Cost comparison Gypsum plaster vs Sand Cement plaster

08.06.2017

Sand Cement plaster is a major component of today’s internal plastering and finishing application. A typical traditional internal plastering application contains of the following steps.

   So, while considering the cost of internal plaster on walls, we consider the following costs:

  1. Sand Cost
  2. Cement Cost
  3. POP punning Cost
  4. Putty Cost
  5. Primer Cost
  6. Paint

    Now let’s look at each of these costs one by one and compare them with Gypsum cost. We have taken Hyderabad as the test market.

  Other Cost Involved:

  1. Transportation Cost: The material at site is generally dumped near the store or some designated area from where the material is lifted to the required floor. In Sand/Cement plaster apart from Cement which comes in bags, sand is transported manually thus raising the costs.

  2. Water Cost: The cost of water is generally never considered however given the scarcity of water, water is purchased at many places. In Sand cement plaster curing requires a lot of water (0.44 gm/per gm of cement) which is saved when gypsum plaster is used.

  3. Electricity Cost: The cost of electricity used to mix sand and cement is also not considered in the equation.

  4. Wastage: High level of wastage is observed in using sand cement plaster due to improper handling of material.

    Total cost of above four if considered contributes to about 2-3% of total cost i.e. Rs. 0.6-0.9/sq-ft.

  5. Volume error in Sand Transportation: Volume of sand is measured with respect to the volume of truck. Transportation of wet sand to site or underloading of vehicle results in 10-15% reduction in
    total sand volume which adds to the additional cost.

 Some indirect cost:

  1. High strength of concrete required: The average density of sand cement plaster is 60% more than gypsum plaster. Hence the load on the building increases if sand cement plaster is used in internal plastering application as compared to gypsum plaster. Hence the grade of concrete required to sustain the load increases giving rise to higher cost. If gypsum plaster is considered during the planning phase itself, savings can be done in maintaining the grade of concrete

  2. Lower available area: Average thickness of Sand cement plaster + POP application ranges from 20-25 mm while with gypsum plaster you can get line and leveled surface from 6 mm to 15 mm thus giving more usable space to the users.

Upgrade your Home in No Time with these Quick Renovation Ideas

Upgrade your Home in No Time with these Quick Renovation Ideas

21.09.2016

Most of us do not take up home renovation projects as they are time-consuming. But, with the right planning and some creative interior design ideas, you can transform your home in no time. We’ll leave the planning up to you, but here are some home renovation tips that are quick to complete.

Looking Up to Manage your Space

Looking Up to Manage your Space

21.09.2016

Building a wall isn’t the only way of dividing a space. Very often a room needs to divided into smaller areas designated to specific tasks based on your needs. For example, you may not want a separate living room and dining room but the space division still needs to be quite obvious. You could do this by varying flooring types and heights, visual screens or even by your ceiling design.

The function of a ceiling is not to just to cover the underside of the roof structure, they also play an important role in the acoustic and thermal comfort of a room. That said, ceiling ornamentation isn’t purely decorative either. One of the smartest ways of managing your visual space through ceiling design is by using false ceilings. To create a false ceiling, gypsum board is suspended from the original ceiling. Curves, steps and other designer ceiling options for space management can be achieved with Gyproc, a pioneer in false ceilings.

Lighting up the Ceiling

Lighting up the Ceiling

21.09.2016

Can you imagine your home without lights? If it were only functional, we would have designed a way for lamps and lighting fixtures to disappear during the day but lights have an aesthetic function as well. In terms of fixtures, it can be split between mobile and immobile fixtures with mobile fixtures like lamps being responsible for task and ambient light and the latter such as ceiling lights being mainly responsible for ambient light.

With Gyproc, false ceilings today are easy to install and expand the variety of light fixtures to choose between. Ceiling lights can be categorised into three sub categories: recessed lights, flush lights and suspended lights. The choices can be confusing so here’s an introduction to the basic different types of ceiling lights.

Layered Drop Ceilings

Layered Drop Ceilings

21.09.2016

The beauty of working with Gyproc boards is that they can be suspended at varying heights and cut as per design requirements. Thus instead of dropping the ceiling at only one specific height, you could even create a step effect on your ceiling. This can be done either by working inwards from the wall ends of the ceiling or outwards from a focal point in the room. For example, a staggered step ceiling in one corner of the living room could designate the bar area.

Sun Roof

A partial sun roof not only creates a focal point in the room but also gives the room an unbeatable attractiveness. Ask any designer and they’ll tell you that nothing beats natural light! Privacy can easily be maintained by designing the sun window in such a way so that it can be opened and closed. The only limitation of having a sun roof is that it is possible only on penthouse apartments and top floors of a bungalow.

Home Improvement Ideas to Beat the Summer Heat

Home Improvement Ideas to Beat the Summer Heat

21.09.2016

Home improvement ideas to beat the summer heat.

Getting your home renovated? Or moving into a new apartment? Summer is a great time to get your home renovated while you spend an enjoyable vacation with your family. So make your home the coolest thing on the block this summer with these home improvement ideas. With some simple changes to your rooms, you can up your style quotient several notches!