Roofing materials for flat roofs

Despite what is called the flat roof when installed certainly creates slope up to 7% for better drainage of atmospheric moisture from the roof.It is absolutely horizontal roof will last long enough.Changing cycles of freezing and thawing of accumulated water, the soil layers and even germination of seeds of plants listed by the wind - the reasons for the rapid destruction of the roofing materials.It is therefore important not only to design a flat roof with a minimum slope, but also to find appropriate materials for quality.

Unlike classical pitched roof, flat roof settling layers.On the supporting structure is made pouring leveling screed (usually sand and cement), steam further stacked, insulation and finishing layer - waterproofing.Besides developing are definitely on the roof-water intake funnel (when the device internal drainage system) or rainwater gutters to drain rainwater and melt water into the sewer.And on the perimeter of the roof to protect the safety of construction workers and the roof of the wind developing are parapets.

flat roof At the same time operated roof (well equipped with top solarium, parking, etc.) should be more robust and reliable base-slab than in unexploited options.Also choose the heater operated roof that can take heavy loads (up to 200-250 kg per m2).

main requirements for roofing materials - work in a temperature range from -70 to +100 degrees, strength and durability, low flammability performance, thermal conductivity and hygroscopic.

Materials for roofing and waterproofing for

flat roof for waterproofing in one or often several layers (fixing by fusing / welding or cements fixing) laid following roll materials :

• bitumen-polymer (Izoplast, filizol, Windowetc.);
• coatings based on synthetic rubber (EPDM membrane with polyester mesh reinforcing and without membrane-based thermoplastic olefin);
• polymer coating - PVC membrane reinforced with a polyester mesh;
• bituminous coatings (roofing material, metal and foil insulating).

addition of roll, use the following mastic and piece materials :

• asbestos cement slate (obsolete, quite brittle material);
• evroshifer ondulin or colored (durable, easy to installation, the service life of about 30 years);
• metal roof rebated (sheets or tapes with a protective anti-corrosion coating for roofs with a service life of up to 100 years);
• tiles (bitumen, ceramic, cement and sand);
• mastic resin, polymer-bitumen, butyl rubber, bitumen-latex, hlorsulfopolietilenovye (like liquid rubber, applied in several layers of self-leveling means any construction of flat roofs, the service life of up to 25 years).

Insulation of flat roofs, materials

heat loss through the roof can reach 50%.Accordingly, in order to reduce heating costs, to equip a comfortable climate of the attic or top floor and increase the rigidity of the roof, insulation materials are required, which in turn can be rolled, bulk, flood (sprayed) or in the form of plates.

Note!The thickness of the insulating layer is effective from 2.5 to 10 centimeters.It is important to take care when installing and vapor control layer, for which foil (aluminum) substrate or plastic film can act.Builders - professionals are advised to lay a vapor barrier on the hard floors, then fill the filter material, and only then proceed to the insulation.

insulation Loose-fill insulation

bulk materials most beneficial financially, but over time can "slide" to the side of the roof slope.

Keramzit used for thermal insulation of roofs exploited.At the same thickness, which is placed on a geotextile should reach at least 5 cm. Suitable concrete block with a fraction of less than 32 mm for flat roofs.This material is able to withstand heavy loads, but differs not the low weight.Above the insulation layer of waterproofing is required, as the material is sufficiently hygroscopic.Guaranteed service life - not less than 50 years.

gravel packing is used for thermal insulation of roofs unexploited.Most often used not in the form of insulation, and finish as the top of a mound of layers of heat, steam and water proofing.

Sand perlite (expanded, particulate) characterized by low water absorption, high coating strength, good sound quality.Completely safe, non-flammable, economical.Available with a fraction of from 0.16 to 5 mm.Cost - 3500 rubles per 1 m3.The average bulk density - 75-100 kg / m3.Also popular bitumoperlit - durable material for thermal insulation of flat roofs with high wind - and fire resistance.

Roll materials for thermal insulation of flat roofs

Roll materials - it's all kinds of wool mineral impurities.Distinguished by good thermal and acoustic insulation properties, but are not environmentally friendly (used in the manufacture of components for the health of unsafe).

1. glass wool (glass wool) - produced not only in the form of rolls, but also in the form of plates or mats.The maximum service life - 15 years.Too hygroscopic, requires the mandatory presence of the waterproofing layer, the installation may be irritation of the skin and the lungs, low density wool.The cost ranges from 570 to 1500 rubles per roll / video.
   

   Using glass

2. Cotton basaltic .An expensive but very effective insulation for flat roofs.More popular in the form of plates (from 5 to 8 thousand rubles per cubic meter), rather than rolls (400 rub. / Package).If the wool is added gidrofibrozatvor, the insulation has excellent water-repellent properties and zvukorezonansnymi.Basalt fiber is not fuel (when heated it does not emit toxic substances into the atmosphere), stands a huge number of abrupt change in temperature (up to 50 years of operation) cycles.
3. slag wool insulation is a mixture of Dust remover, synthetic resins, as well as mineral fibers (blast furnace, open hearth, cupola slag or non-ferrous metals) up to 6 cm in diameter and up to 0,005 mm.The material is not widely used in the construction of capital facilities due to loss of properties during sudden changes of temperature and humidity.

Two sided slab

Boards insulation is very easy and fast to install.Most manufacturers made plates with L-shaped edge for better connections and reduce the possibility of formation of cold bridges.Plates are placed on the type of brick rows, observing the run between the seams and fixing joints with duct tape (preferably foiled).

1. foam - commonly known easy and inexpensive insulation with a thermal conductivity of 0.04 W / mK.Disadvantages of heater - its fragility, is almost zero vapor permeability, the service life of up to 15 years and the ability to break down when applied nitrokrasok and solvents.
   

   roof insulation using foam

2. Foamglass - it is foamed cellular molten glass mass (produced in the form of boards, chips and pellets).The service life of the material is huge - up to the 1st century.The thermal conductivity is low - 0.04 W / m * K.Insulation non-flammable, environmentally friendly, a good sound insulator.Effects of temperature, pests, humidity is not exposed.However, boards that are glued to the asphalt mastic, weigh quite a lot and does not have good performance impact resistance and therefore requires pouring reinforced screed.
3. Expanded polystyrene, extruded - insulation, which is filled with carbon dioxide or air pellets, with the addition of preservatives.The thermal conductivity of less than 0.027 W / m • K.It features a long-life, resistance to mold growth, microorganisms, low water absorption.Lightweight, tough, easy to installation.However, the material is flammable, almost a vapor.The cost (for example, company Thermit insulation) from 95 rub. / Pcs, 1200 rubles per piece or 4000 rubles per 1 m3.
   

   Expanded polystyrene, extruded

inundated heaters

1. Foam - it is warmer on the basis of cement and organic blowing agents.Others, lightweight, fireproof, frost, density and pressure on the structure is minimal.The thermal conductivity of all 0.05-0.3 W / mK.Fill the formwork produced steam generator.
2. Polystyrene foam concrete has similar characteristics but is more dense and heavy.Filled with monolithic layer dries approximately day.A solution of polystyrene is prepared on site and poured Pneumosuperchargers.The thermal conductivity of less than 0.055 W / mK.

Polyurethane - monolithic coating with closed cell structure.The thermal conductivity of a record low - only 0.19 W / m * K.Spraying is done strictly at plus air temperatures and the absence of strong winds.Thermal insulation is made on the prepared layers (dust-free, dry) surface, each layer having a thickness of 15 mm, the number of layers - at least three.It requires protective coating, as is destroyed by ultraviolet rays.

When selecting a material for roofing, waterproofing and heat made guided not only of price, quality, weight, durability of materials, but also based on the purpose of a roof.The important role played in the construction of the appointment of the exploited roof.So, if you are planning the construction of the pool, the emphasis on increased gidroizoltsionnym properties "sandwich roof", and in the regeneration of the pedestrian zone in the solid plates or road tiles are used as roofing material finish.It is extremely important to choose the heater that will keep the form and gives way under the influence of any (static or dynamic) loads.

Video - The device of flat roofs and roofing materials