- What materials are used for waterproofing the roof?
Waterproofing the roof is the most important stage of home construction, as it protectsChez dwelling from external weather conditions, whether it be rain or snow, as well as a strong wet wind. High-quality waterproofing of the roof of your home will provide reliable protection and keep the home warm and dry. As the work is done, the first heavy rain will show, which will reveal all the deficiencies.
In order to avoid roof leaks, after the first bad weather days, you should carefully and very carefully conduct waterproofing with modern materials that are represented by many types, if you do not want to re-perform protection against moisture, which will result in significant costs. Before considering the types of insulation for the roof it should be understood that the roofs are sloping and flat.
Each type requires the use of a specific waterproofing material and method of its installation. In order to successfully and
successfully conduct self-waterproofing
roof, you should understand the basic principles of the work, and what types of waterproofing for the roof exist. Conducting waterproofing the roof with their own hands will save the budget and significantly reduce the cost of professional roofers.
If you are not confident in your abilities, it is better to invite specialists who know their business and will do everything according to the rules of construction. In this article we will try to explain in detail the main points and small nuances in order to prepare you as much as possible for waterproofing roofing. It should be remembered that moisture can come not only in the open form of precipitation, rain or snow, but also in the form of steam. Therefore, careful consideration of all aspects of the work and types of building materials for waterproofing will avoid unpleasant moments and additional costs in the future.
What materials are used to waterproof the roof?
- . Perforated waterproofing film. - otherwise referred to as a hydro-barrier or anti-oxidant film. This is an effective protection against moisture, which withstands considerable pressure, and therefore is one of the best waterproofing materials for the roof. It can be used not only for the roof, but also for the basement walls and the foundation. In appearance, it resembles a simple polyethylene film, which is much stronger and better in its physical properties.
- Polymer film( PVC membranes, superdiffusion membranes, EPDM membranes) is also a good waterproofing material, many types of which make it possible to waterproof different types of roofs. These membranes have a good service life and have an excellent indicator of environmental safety and fire safety. A feature of this building material is its elasticity, which allows it to be used on all types of roofs, be it sloping or flat roofing.
- Obmazochnaya waterproofing - this includes silicone, bituminous, rubber and polyurethane mastic. The classic type of waterproofing, which was used even by our grandfathers to protect the house from moisture. Modern development and application of new technologies in the form of synthetic resins and other chemical additives make the coating waterproofing one of the most sought-after and available on the modern construction market.
- Sprayed waterproofing is a simple liquid rubber or two-component acrylic compound, which is also effective in waterproofing the roof. This material has excellent elasticity and prevents water from penetrating through the layer that was applied to the roof surface. Sprayed waterproofing is not deformed by external factors and is a reliable protection of the roof of your home.
- injection waterproofing materials - these include silicate, polyurethane, acrylic resins, as well as cements and emulsions. This is an absolute protection against moisture, which, with special equipment, is easily applied to the roof of a house. The essence of injection waterproofing is in the formation of a membrane by injection of a hydrophobic gel, which is injected into the outer space of the overlap and clogs the pores during curing.
Now let's take a closer look at some types of waterproofing materials that are most often used to protect roofs from moisture.
Polymer membranes for roof waterproofing
This type of waterproofing is a new technology in the modern construction market, so we will focus on it in more detail. There are membranes PDM, PVC and diffuse .The latter can be divided into diffuse, microperforated, superdiffuse and anti-condensate.
- diffuse type microperforation membranes are suitable for any roofs, but here it is important to leave a small gap between the thermal insulation and the waterproofing itself.
- When using superdiffusion membranes , such a gap is not required.
- anti-condensate membranes are best used with when building an metal-tiled roof, as the material tends to absorb condensate, thereby protecting against moisture accumulation in the roofing system. Such membranes have high strength and can last about 25 years. In addition, they are fireproof and environmentally friendly.
PVC membranes are also a multifunctional waterproofing material that is perfect for repairing an old roof and building a new one. Such a film is durable and its replacement will be required not earlier than in 20 years; therefore, it is quite attractive for creating effective protection against moisture. This film consists of 3 layers, the outer and inner layers are plain PVC of a certain color, and the inner layer is reinforced polyester. These membranes are sold in rolls and are mechanically mounted or using the ballast method. In the second case, the slope of the roof should not exceed 10%.In the ballast method, the membrane is laid on the roof surface, and on top of it is covered with gravel or rubble. Mechanical fastening is screws, nails, staples.
Multifunctional waterproofing is an PDM membrane that is suitable for any roofs that have any slope and shape. The material is laid to each other, and the joints are glued together with a construction adhesive tape. If the roof is flat, then a layer of bulk building materials is poured on top of the PDM.This is a stable waterproofing with a long service life, which reaches 50 years , she is not afraid of frost, sun and other weather factors. The material is very elastic and can be lengthened by 250-300%, which will allow waterproofing of even the most hard-to-reach places, which, due to its curvature, are difficult to cover, such as roll-type waterproofing.
Coating waterproofing of the roof.
The main basis for coating waterproofing materials is bitumen, which covers the surface with a layer from 5 millimeters to several centimeters. In time, bitumen loses its elasticity, , and can mechanically collapse when exposed to it mechanically. Usually, the life of simple bitumen ranges from 5-7 years. A new generation of bitumen mastic uses polymer additives that increase service life and create a more effective waterproofing.
- Apply mastic usually on a straight roof or roof with a minimum slope.
- The composition of mastic materials is bitumen-rubber, polymeric or bitumen-polymeric .
- According to the method of waterproofing they are divided into hot and cold.
In the first case, requires heating mastic to temperature +160 degrees Celsius. It is used immediately, and it is not stored for future use.
Cold mastic can be used at any convenient time and does not require heating, only if the ambient temperature is less than + 5 degrees, then it should be warmed up to +70 degrees Celsius.
This is a very good waterproofing material, despite its fragility, as it adheres well to any substrate, be it concrete, metal, wood, or other roof surfaces. When polymer mastics solidify, they form a reliable rubber waterproofing, which will last about 20 years. In a different way, such waterproofing is called a self-leveling roof, since the process resembles the creation of self-leveling floors.
Paint waterproofing of the roof.
. This type of roof waterproofing consists in applying paints, enamels or emulsions based on bitumen and polymer additives. Paint waterproofing applied with a roller or automatically using an sprayer .Evenly create several layers one after another with an interval for the previous layer to solidify. Such layers are usually 2-4 and this gives greater waterproofing strength, and its greater durability. The thickness of the general layer of protection against moisture can reach 6 centimeters. To harden the surface after finished to apply the layers sprinkled with fine-grained sand in order to harden the surface. Although the short life span, which is 5 years, is not very attractive, but such waterproofing is reasonable in price and will not require a large budget.
Roof glazing waterproofing
Roof glazing waterproofing is one of the oldest and tested. The most common material to create a protective layer, which is used for a long time is roofing material. This material has the most affordable price and is quite easy to install, which does not require special skills and knowledge. Even a beginner can cope with this if he carefully reads information on how to carry out these works.
This method of waterproofing involves the use of not only traditional rolled materials, but also other analogues of roofing material that have the best physical properties - it is glassine, roofing sheets, glass blocks, waterproofing, brizol, isol. There are also new materials that have been developed quite recently and have already proven themselves for their practicality and excellent waterproofing properties - vinyl plastic, polyethylene, isoplast, bridgeplast, PVC, isoelastic, ecoflex.
When laying waterproofing waterproofing on the roof of a house with rolled materials, such as roofing felt, you should prepare the surface of the roof where it will be protected from moisture. The surface should be maximally smooth and flat , irregularities up to 2 millimeters are allowed. After all the alignment work has been done, the surface will be primed with a layer of bitumen emulsion and then the rolled material that you plan to use will be laid.
Sheets of ruberoid or other material overlap each other by 15-20 centimeters. After sticking the rolled waterproofing, the surface should be sprinkled with stone powder. It should be understood that such a waterproofing is sensitive to mechanical damage and this factor should be taken into account. Work on waterproofing roll method should be at a temperature of + 10-15 degrees Celsius. The cheapness of hydroprotection of the roof by this method, which is about 10 dollars per square meter, attracts most people who decide to waterproof, having a small budget.
. Penetrating waterproofing for the roof.
. This type of waterproofing is often applied to a surface with a porous structure. These are concrete, brick, foam blocks and other limestone blocks. To apply penetrating waterproofing, requires to prepare the surface well, that is, to clean it from contamination. Such impregnation penetrates all cracks and pores of the surface, filling and waterproofing them, hardening inside. Such impregnation not only perfectly preserves the treated surface from moisture penetration, but also strengthens the structure of the whole structure.
In , materials such as liquid polymers, synthetic resins or water glass are used as waterproofing materials. For the application of such compounds, spray guns are used, with which it is most convenient to conduct penetrating waterproofing. At the same time, the surface should be degreased with and well cleaned so that the impregnation easily penetrates into the structure of the treated surface and forms crystals there that will create a protective structure that prevents moisture from penetrating.
Some tips on choosing the material and method of waterproofingIf it is good to process the joints between the foam polystyrene panels, then the protection from moisture will be even better. Also used waterproofing film, which is a simple polyethylene, but more dense. Other similar materials can be used better and more expensive using the latest raw materials, which make waterproofing even more efficient.
Waterproofing of a flat roof
- When carrying out protection against external weather conditions of a flat roof, you can use membrane waterproofing in conjunction with insulation. This is called inversion roofing when several types of waterproofing are used together with other materials.
- Another way to waterproof a flat roof - is a self-priming waterproofing , which involves the use of mastics. In this case, the mastic can be used, as well as on new roofs, and to restore old waterproofing coatings.
- Another excellent option to protect the flat roof is liquid rubber , which perfectly performs its task on the roof surface.
- If the budget for roof waterproofing is quite small, a good choice would be rolled materials, which are represented by a large selection, but the most available is of roofing material or its more modern counterparts, such as rubemast or euro ruberoid.
If you want to carry out the attic in the attic of the house, then you can use superdiffusion membrane in conjunction with vapor barrier and insulation. This is certainly not the cheapest method of waterproofing, but one of the most effective. With it, you can be sure that the protection against the ingress of moisture will be of the highest class. Membrane waterproofing is suitable for roofs with a complex configuration, as it has good elasticity and flexibility, which allows you to create any configuration for bending.
Waterproofing slate roofs and under metal roofing
A roofing material such as slate, which is not afraid of moisture and is a good waterproofing, should be mentioned. Previously, roofing felt was laid under slate, and now uses hydro-barrier or perforated waterproofing film. The same method of waterproofing is used under the metal.
The film is attached to the rafters with a sloping roof or overlapping lags. To fasten the material, stainless steel nails or staples are used, with which an additional sheathing of special wooden slats is mounted.
For roofs where the metal coating , such as metal tiles, are used, it would be best to use a type of waterproofing such as anti-condensation film , which will absorb condensate that has accumulated in ore-accessible parts of the roof, thereby preventing moisture from entering.