Fire-resistant gypsum cardboard is applied in rooms with increased requirements to fire safety, at installation and finishing, repair works in industrial, residential units. Material is delivered in sheet format, is selected taking into account climatic features, humidity level indoors, on specific marking and characteristics.
Sheets of fire-resistant gypsum cardboard have pink color shade, differ in the expressed fire-prevention effect. Fire-resistant material resists naked flame within 40 minutes, and only then ignites. This time usually is enough to evacuate people. The increased heat-resistant properties — result of use of specific components which undergo heat treatment in the course of production.
Features of structure
Fire-resistant gypsum cardboard (GKLO) represents two cardboard plates with layer from plaster blend. Facing material quite often has additional water-repellent impregnation. Plaster weight at production amplifies the special reinforcing threads from fiber glass which are not afraid of the increased temperatures and serve as peculiar strong framework. They protect material from destruction under the influence of flame.
As a part of heat-resistant gypsum cardboard there is clay which sinters and does not allow it to collapse completely. Cardboard coverings of GKLO reliably connect to the core by means of the specific gluing material that allows them to be part of reliable fire-resistant framework. Plaster weight contains crystalline hydrates which at strong heating emit water. Therefore GKLO often call "the firefighter for themselves".
Choice subtleties
Fire-resistant sheets of gypsum cardboard with maximum efficiency are applied at finishing work as protect not only from extremely high temperatures, ignitions, but also prevent formation of fungus, mold, microbes. Overlapping of basic color of plates will require special putties and coloring pigment. Fire-resistant gypsum cardboard does not differ in high strength, but this shortcoming is blocked by advantages of material. The eco-friendly products are used at schools, kindergartens, municipal institutions for ensuring full safety at ignition.
Correctly to pick up GKLO, it is necessary to consider several factors. Each leaf has to be equal, without ruptures and cracks, wet spots, hollows, bends, hollows. Therefore before purchase gypsum cardboard needs to be considered attentively if there is such opportunity. Even excellent reputation of the supplier — not guarantee of eternal quality of heat-resistant material.
The following factor — studying marking. It is noticeable on rear side or face where dimensions and the producer register. Also the type of gypsum cardboard, GOST and type of edge of product is specified. Before purchase it is necessary to demand from the seller the certificate if you are not sure of product quality. Its availability demonstrates that at production all standards have been observed. In the market there is a lot of kontrfaktny material which cannot be used for fire protection of rooms. It is recommended to make sure that earlier sheets were stored in appropriate conditions — at average humidity (to 65%), temperature from +10os, on 50 pieces laid by wooden bar.
The last important factor — degree of combustibility of material. In classification there are four main options. For each degree the level of damage of products at ignition is designated, limit of deduction of temperature.
The choice of fire-resistant gypsum cardboard — very responsible step, lives of people, safety of property depend on its quality at protection during the fire. Therefore you should not save on acquisition. Experts advise to study products of the known world brands, and then to choose suitable finishing sheets at reasonable price. Fireproof products of the brand of KNAUF are popular.
Ranges of application of fire-resistant gypsum cardboard
Material is used when forming various fireproof constructions, dimensional designs for inhabited and industrial rooms. Sheet gypsum cardboard approaches for:
- creations of ventilating and airwater boxes;
- constructions of interroom partitions;
- arrangements of suspended ceiling overlappings;
- facings of flues, fireplaces, chimneys;
- special covering of walls from wood for the purpose of giving of fire-resistant properties to them;
- finishings of industrial premises to which high fire requirements are imposed.
Use of GKLO and in saunas, baths is relevant. Sheets are suitable for finishing of recreation rooms in these institutions. The effective remedy of protection against flame provides high-quality decorative facing. Some masters create true pieces of art from internal walls of buildings and the enterprises.
In more detail about mounting of gypsum cardboard with heat-resistant properties
In the course of work with this material the metal, but not wooden profile for framework is used. To protect wood walls, between them and GKLO lay the foiled mineral wool. Polyfoam is not suitable for these purposes as easily ignites.
Then external joints fix by corners, and the others — glue with fiber glass and cover with putty. Because of the high density and the reinforcing fibers in design of fire-resistant gypsum cardboard it is necessary to find more time and forces for twisting of self-tapping screws which longwise have to be not less than 25 cm. Fixing points it is necessary to have quite often with step to 120 mm. When laying standard gypsum plasterboards it is equal to 250 mm.
But it is necessary to get to work with material only after thorough cleaning of surface, removal from it old covering, processing by antifungal and antiseptic structures. Then do marking competently to record profile on the right place. From edge of floor 5 cm, and usually recede from ceiling — 10 cm.
Gypsum plasterboards mount only after full installation of metal section and check of its reliability. If they are applied to finishing of wood constructions, the reliable reinforced tape is laid previously. Putting hard putty becomes completion phase. Experts recommend to use for draft finishing starting plaster blend, and for fair — polymeric structures with decorative properties.