talk about how to avoid them
Snowdrift over the head
first snow, whitewashed rooftops in late autumn or early winter, usually happy - finally something bright and light after the fall of darkness.Loose layer of fresh snow on the roof at moderate frosts works as insulation - reduces vystuzhivanie attics and lofts, helps smooth the temperature regime in a residential area.
But this idyll lasts long.Because the snow on the roof of each accumulated snowfall, compacted and heavier.When thaw saturate with water, it is grainy, crusty.
In early spring, the snow is particularly quickly gaining moisture, and its mass is noticeably begins to put pressure on the roof.At the edges, corners and valleys (the joints of planes) roof of ice and icicles formed;gutters and pipes clogged with ice.When warming melt water can not leave quickly from the roof, dripping walls, it enters the house.Ice and icicles threaten to
usually confronted with snow scrapers roof, icicles and ice chop crowbar.At the same time damaged roofing, bearing structures are affected, and workers at risk to break its neck.
Can we prevent all this trouble?Yes.
The easiest way out - to build a house with a roof of simple shape that is inclined pent, steep gable or broken, and to apply the coating materials unprofiled to slopes were smooth and flat.With a roof of snow easier to fold, and during spring thaws he will move down layers of wet slippery slope.
But in modern architectural projects of residential holiday homes provided residential lofts, warm attics, bay windows, balconies, verandas, galleries, lights, fireplace and stove pipe.All these elements make the profile of the roof rather capricious.Besides now such "non-type" roofing materials, such as roofing, slate, and corrugated galvanized sheet, used less and less.In the course of the ceramic material and shaped metalloplastnye - shingles and its simulation of different species.This means that the surface of the roof is very complex and prone to accumulate snow and ice.
There is a way - "warm roof", ie the anti-icing system, built-in elements of the roof, facade and stormwater.Speaking quite simply, anti-icing system - it is isolated thermal elements of cables which are heated by electric current, melt accumulated on the roof and gutters in the snow and ice and facilitate rapid escape of water.
What is and how it works
Deicing system consists of three parts.It:
1) heating elements and fittings for their installation;
2) distribution and control network (cables, energized, and wire measuring and control devices);
3) control unit (sensors and instrumentation).
heating elements are installed in the most 'sensitive' areas - where the greatest number of accumulated snow and ice, and there, where rushes escapes from the roof meltwater.These places - the joints of the roof surfaces (valley), drainage gutters and trays, cornices, Drip (ridges protecting leakage of water from the eaves on its bottom surface), water cannons (protruding from the roof trays that shed water away from the wall and protect the wall fromwet), prefabricated hopper drain pipes, tubes themselves and their by-meta (lower expanded part), ground drain trays and place of entry into storm sewers.The latter is very important: if the system works and storm water drain below the level of the land is still packed with ice and can not take all the melt water, the water begins to flood the living area.
icing system control unit consists of the instrument parts and sensors.The main control device - the thermostat, which brings together and coordinates the work of the entire system.Basic two sensors: temperature sensor and humidity sensor.They work "in tandem", that is, follow the weather, and the system will automatically include the precise moment when you need it (if you have selected the automatic mode).
Tips for the weather
The best time to work effectively anti-icing system - thaw precipitation.In such weather conditions, ice and water quickly goes from the roof, and fresh snow melts, without having to accumulate and compacted.Therefore, install, debug, and test anti-icing system is necessary to fall, so that it could start to work immediately.
operating and safety
system is quite complicated technically.Therefore, design, build, and test it before delivery can only specialists of the firms that have certification.Specific requirements for the anti-icing system are presented about the electrical and fire, which is understandable: the heating elements and power electrical cabling systems are working in wet environment, and therefore should be excluded leakage current, insulation breakdown and short-circuit.
anti-icing system can be set to automatic and semi-automatic modes.In the first case, it acts independently of the instruments and automation commands.In the second case, the control unit supplies the necessary signals, and includes a host system manually, and keeps track of her work.
"Gardener" №1 - 2007