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Criticism of Kenaf false ceiling

What is Gypsum False Ceiling?

 A gypsum false ceiling is a type of suspended ceiling that has replaced traditional building materials in recent years and found numerous applications in architecture and interior decoration. This ceiling can be used to cover the structural elements of any building’s roof. The term “gypsum” refers to a German company with a long history of producing building materials.

To understand the materials used in gypsum, it should be noted that during the preparation of gypsum panels, a mixture of gypsum and air is compressed between two cardboard surfaces. This results in a lighter and more robust panel. After gypsum panels are installed, the joints between them are filled with putty, and the surfaces are sanded and painted.

Gypsum work is an alternative method to traditional plastering for walls and ceilings, often being easier and more cost-effective.

Types of Gypsum False Ceilings: There are two main types of gypsum false ceilings available in the market:

1. 1. Suspended or Modular Gypsum False Ceiling:

• Also known as suspended, click, or modular ceilings.
• These ceilings typically consist of gypsum tiles with dimensions of 60 x 60 cm, mounted on a framework that supports their weight.
• The tiles are movable and can be replaced, making them “modular.”
• These tiles are made from gypsum panels, and the supporting structure is usually galvanized.

Suspended gypsum false ceilings come in various variations, including:

1. Simple gypsum tiles used for decorative purposes.
2. Gypsum tiles with PVC coatings for moisture resistance, suitable for wet environments like bathrooms.
3. Gypsum tiles with PVC coatings and aluminum foil backing, similar to the previous type but with enhanced moisture resistance.
4. AMF gypsum ceilings, providing thermal, acoustic, and fire-resistant properties.
5. Metal-grid gypsum ceilings, more moisture-resistant and durable than standard gypsum tiles.
6. Perforated or acoustic gypsum tiles, acting as soundproofing elements.

2. Seamless or Fixed Gypsum False Ceiling:

Second. Integrated or fixed Kenaf false ceiling

This type of Kenaf false ceiling consists of plaster panels and galvanized structure. Gypsum panels, which are known as knaf, have knaf sheet size of 240 x 120 cm. Their thickness is 6, 9.5, 12.5, 15 and 18 mm. which completely cover the roof and present a unified roof.

Types of Knauf gypsum panels

• RG normal cover sheets: this sample is used for general purposes.
• FR gypsum sheets that are resistant to fire.
• MR gypsum sheets that are resistant to moisture.
• FM gypsum sheets that are resistant to moisture and fire.

Types of plain gypsum panel (RG)

1- 5.6 mm plaster coated panel with dimensions of 1200*2400

These panels are used to perform sharp arcs.

It should not be used for simple false walls or ceilings.

2- 5.8 mm plaster coated panel with dimensions of 1200*2400

These panels, like the previous one, are only used for sharp arcs.

It should not be used simply for the implementation of false walls or ceilings.

3- 9.5 mm plaster coated panel with dimensions of 2500×1200 and 1200×2400

These panels are used to execute arches.

It should not be used for simple false walls or ceilings.

4- Gypsum coated panel 12/5 with dimensions of 2500×1200 and 1200×2400

These panels are generally used in dry construction. Like:

• Partitions
• Kenaf separating walls
• Covering walls (lining)
• Kenaf false ceilings

These types of panels are also used in dry environments without the risk of fire.

5- Gypsum coated panel 15 with dimensions of 2400*1200

This type of panel is usually used in partitions or separating walls.

Of course, they are thicker than the 5/12 panel and are used for places that require more resistance.

This type of panel can only be used in dry environments without fire risk.

6- Gypsum coated panel 18 with dimensions of 2400*1200

It is used in special spaces where there is a need for very high strength or there is a risk of hitting the wall.

It can also be used in dry environments without the risk of fire.

Fixed Kenaf false ceiling is implemented in two ways:

1. Integrated false ceiling with double-sided structure or type A
2. Integrated false ceiling with one-way structure or type B

Implementation steps

Depending on the type of Kenaf false ceiling, its implementation can be slightly different, but in general it is as follows:

1. To implement Kenaf in false ceilings, first the metal grids of the infrastructure structure are connected to the main ceiling.
2. Then the false ceiling panel profiles are installed on the carriers to complete the infrastructure system.
3. In the next step, the gypsum panels are screwed to the metal substructures.
4. In the fourth step, all seams are treated with a mixture of Kenaf putty powder and putty water to create a smooth surface. The putty is applied in two stages, lining and top, with a time interval of about 7 hours.

And finally, the false ceiling of Kenaf is prepared for underlaying paint.

Important points in the implementation

1. If the execution of the kenaf is not done correctly, there may be cracks in the false ceiling.
2. High-quality putties should be used for sealing and plastering so as not to cause much damage to the roof.
3. The use of mastic putties increases the final quality of the work, saves paint consumption, and also helps the paint stick more.
4. The executive team of the Kenaf false ceiling should apply a lining layer on the Kenaf panels or use mastic putty.
5. The surface of the knaf must be sanded and prepared before applying the paint.
6. Mastic powder is softer than putty powder, and its use has a greater effect on the beauty of the Kenaf false ceiling, and it is much easier to paint on them and it cracks later.

Advantages of Kenaf false ceiling

1. It is resistant to heat and fire.
2. The mechanical and electrical facilities and infrastructure of the building can be covered with a false ceiling.
3. After installing the movable false ceiling, it is possible to access the back of the Kenaf false ceiling and the underlying facilities.
4. It is light.
5. Konaf false ceiling PVC models are resistant to moisture and heat in bathrooms.
6. It lowers the cost of plastering and painting the building, so it is economically viable.
7. Its installation and repair is easier than some other roof structures and its implementation is done faster.
8. It is heat and sound insulation.
9. It has high safety against earthquakes.
10. It has the ability to be recycled and the equivalent of 75% of materials helps to reduce construction waste, therefore it is considered useful in terms of environmental aspects.
11. It has the possibility of high colorability and leaves the hands of interior designers open for different colors.
12. Kenaf false ceiling has a high ability to apply various designs in interior decoration and is very useful for renovating houses and changing old spaces.
13. It can be used in lighting to install all kinds of chandeliers and built-in or surface lighting.

Disadvantages of Kenaf false ceiling

1. All types of Kenaf false ceiling are not moisture resistant.
2. The panels of this roof do not have high impact resistance when installing equipment on the roof.
3. These roofs keep dust in them.
4. The material used in the Kenaf false ceiling is very important. If low-quality raw materials are used in it, it will bring many problems. If the material of Kenaf and its structures are not of high quality, the roof will “belly” or crack over time.
5. It is true that the execution of the Kenaf false ceiling is easier than some other ceiling structures, but if it is not installed by professionals, the final view of the work may not be very pleasant. For example, it is possible:
6. Substructures and the height code of the panels are not aligned.
7. Panels are not cut carefully and are irregular.
8. The sealing tape is not used and the width of the putty is not suitable.

So entrusting the work to professionals is very important in the implementation of this work.