Best waterproofing and thermal insulation
Introduction to waterproofing and thermal insulation
Waterproofing is defined as the use of a waterproof material or group of materials on the external surfaces of walls and ceilings of buildings, in addition to other parts such as foundations that create a barrier that prevents water from penetrating through the pores of these surfaces. This type of insulation is often used in parts of the building exposed to high levels of moisture, such as even and basements that are located below street level, bathrooms, kitchens, green roofs, and so on.
Thermal insulation is defined as the use of a material or group of materials with specific properties that delay the transmission of heat currents flowing through layers of walls and ceilings directly connected to the outside, in addition to floors or any parts that have a high thermal conductivity
The best waterproofing material
There are many waterproofing materials used to protect buildings and structures from the harmful effects of water and corrosive chemical liquids, such as acids and alkalis, and the most famous of these insulators are:
Cement insulators: They are cement mixtures with low porosity, and are often made in internal corners that are constantly exposed to water, such as toilets and showers, and are characterized by being easy to prepare and low cost.
Coating films: They are durable layers of insulating coating made of asphalt mixed with polymers, applied in thin thicknesses by spraying, and soon transformed into a rubber membrane resistant to water seepage through the surfaces.
Bitumen paint: Also known as asphalt paint, it is one of the best waterproofing materials used specifically on concrete foundations, as this paint becomes hard after it is heated, but it loses its effectiveness and becomes more fragile when exposed to sunlight for a long period of time.
Foamed polyurethane: It is used in the form of a liquid foam film that is common on flat surfaces exposed to weather factors and in car parks. It has a high resistance to corrosion and is difficult to remove from the floor easily, and it also acts as a water and thermal insulation at the same time, so the cost of its use is high.
The best heat insulating material
The selection of the appropriate material for thermal insulation depends on several factors, the most important of which are the initial cost, efficiency, durability, and its ability to form according to the surface, ending with the method of its installation. A wide range of commonly used thermal insulation materials are available, including:
Foamed polyurethane: It is one of the best options available in the market for insulating materials, and it is in the form of solid panels with good thermal insulation properties, low moisture permeability, and is resistant to water absorption as mentioned previously, and it can be manufactured in different shapes and sizes.
Expanded Polystyrene: They are plastic beads produced through the polymerization of styrene, which take the shape of a pearl, and are formed by extrusion and casting methods. , where it loses its efficiency and ability to isolate.
Expanded Perlite: Perlite is a rock of volcanic origin that contains silica and aluminum and is chemically inert. This material is considered to have good thermal insulation efficiency, but it contains grains that are entrusted with absorbing moisture, so they become less effective over time. Caution is advised during installation in facilities, as perlite dust is harmful to health and may cause poisoning.
Fiberglass: Also called blankets or mats, this material has a low thermal conductivity that makes it highly resistant to fire and high heat in addition to multiple chemicals, and is absent from its weak structure that does not enable it to resist pressure and moisture.
Cork: Available in the form of panels or granules, and has medium mechanical resistance, and tends to absorb moisture, but it is a good and effective thermal insulator, resistant to pressure and not easy to burn, and it is considered one of the oldest commercially used insulating materials, and due to the scarcity of cork-producing trees, its price is high relatively, compared to other insulators, so its use is very limited.
Benefits of waterproofing and thermal insulation
permanent protection from moisture; The use of cement insulators that cannot be punctured or torn at the construction stage or after that gives the building permanent protection from water leakage in addition to reducing the formation of black spots and peeling wall paint.
Saving Money; As adding insulators to projects increases their returns on investment and their financial value, and it is better economically to choose a material with high thermal resistance - low thermal conductivity - instead of resorting to increasing the thickness of the other layers, which in turn reduces the thickness of the walls, and increases its resistance to heat at the same time.