Frequently asked questions

DIMITRIADIS GROUP, in Thessaloniki, offers below some useful information regarding plasterboards. We are hoping that we can help you understand what plasterboard is, for those who do not know, and to give answers to several questions you might have regarding the nature and the use of this building material.

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1. What is plasterboard?

Plasterboard consists of mineral plaster, lined bilaterally with paper. It is an insulation material with excellent sound, fire, and earthquake proof properties. Suitable for a quick construction, with no health risks and debris-free.

2. How many types of plasterboard are there?

Standard Plasterboard for General Use General purpose plasterboard for construction of partitions, ceilings, wall panels and special applications.

Moisture Resistant Plasterboard The moisture resistant plasterboard is used in spaces with high humidity such as bathrooms, and outdoor spaces.

Fiber Plasterboard "Vidiwall" Compact plaster and cellulose structural slab with great weight, hard surface and large mechanical strength. It is used in spaces that require impact resistance and the ability to suspend load directly to the wall without special support frame. The fiber plasterboard Vidiwall - 4VT is produced with a thickness of either 10mm or 12.5, with its four edges milled for better and easier grouting. Dimensions: 1200mm x 2800/3000mm or 1000mm x 1500mm.

Fireproof plasterboard "Fireboard" Special building plasterboards that meet the toughest requirements of passive fire protection. The special fire resistant core has a basis of plaster and perlite, enclosed by non-combustible fiberglass. They are under the A1 category of completely non combustible materials according to DIN 4102. The Fireboard is produced with a thickness of 15, 20, 25mm and dimensions: 1200mm x 2000mm.

Sound absorbing perforated plasterboard Plasterboards with a circular, square or irregular perforation in a variety of designs and perforation percentage for sound absorbing surfaces. Dimensions: < 1000mm - 1250mm Χ max. 3000mm, depending on the perforation.

Sound-proof plasterboard "Piano" High density plasterboards for high insulation needs.

Plasterboard "La Vita" Plasterboards, with carbon-coated paper, for spaces protected from electromagnetic radiation. Produced with a thickness of 12,5mm. Dimensions: 1250mm x 2600mm.

Moisture and Fire Resistant Plasterboard Used in areas where high standards of protection against moisture and fire are required simultaneously, e.g. bathroom partition wall - other spaces, etc.

Cement board A material that is resistant to any weather condition, for outdoor constructions and applications in bathrooms, as well as structures that are in direct contact with moisture.

3. Ways to improve the sound insulation of plasterboard partitions.

The law of mass: More mass means more insulation. Heavier boards equal better sound proofing.

The law of asymmetry: Plasterboards of different weight equal better sound proofing. The reason: the partition will have two critical frequencies, but with less impact and distance.

The law of distance: Greater distance between the plasterboards equals better sound proofing. Leave a distance of minimum 5cm.

The law of disengagement: Fewer connections between the plasterboards equal better sound proofing.

The law of sound absorption: The existence of sound absorbent material in between the plasterboards equals better sound proofing. We use fibrous materials such as wool, or glass wool, at an average density of about 50kg/m3. The gap can be fully filled, but 50 - 75% is enough. Warning! Never use soft or hard foam materials between the plasterboards.

The law of continuity: Gaps, cracks, breaks – no matter how small they bring upon a decrease of the sound proofing of the plasterboard partition/false ceiling. The poor jointing of plasterboards for example, is a severe blow to their sound proofing performance. It is important to use a soundproof material like Stickson to provide the required airtightness. Stickson – an elastic adhesive material – will be placed in the interior. The exact position depends on the specific objective.

The law of lateral transmission: Lateral transmission can actually invalidate even the best soundproofing performance: false ceilings, elevated floors, slightly adjacent walls, etc, often contribute to the dramatic deterioration of the sound insulation of plasterboard constructions.

The law of perimeter isolation: The isolation of partitions from the floor, ceiling and walls with the correct materials can increase the sound insulation by 3 – 4dB.

4. What are the benefits of using plasterboard?

Plasterboard is the ideal material for interior renovations, since it is suitable for wall panels, false ceilings, and soundproof partitions. It is a flexible, fast and tested construction method which causes the least possible disturbance to the residents.
Among the many advantages of plasterboard construction the following stand out:

✓ Excellent fire performance
✓ Excellent thermal and sound insulation
✓ High stability/rigidity
✓ Low weight
✓ Humidity adjustment
✓ Quick and budget-friendly construction method
✓ Completely flat and uniform surfaces, suitable for painting or other finishes.

5. What kind of structures can be made using plasterboard?

Today drywall construction provides effective and functional solutions to many technical problems which standard construction is unable to face. Due to the “convenience” in the use of plasterboard, we can construct the following:

✓ Plaster decorations
✓ Indoor partitions
✓ All types of false ceilings
✓ Wall panels and other panels
✓ Thermal and sound insulation constructions
✓ Fireplace panels
✓ Outdoor constructions – Cement board constructions
✓ Special structures