How can increase the thermal conductivity of the steam heater – Water and steam can increase the thermal conductivity of the insulation material plate Rockwool . Except for a vapor foamglass most insulating materials lose insulating properties when wet . Moisture from the soil during storage , humidification during construction, as well as rainwater during transportation, storage and installation can lead to a decrease in thermal resistance .
To protect from moisture materials and structures take the following measures :
– sensitive to wetting insulation materials protect against moisture and to prevent water absorption ;
– arrange layers of flat roofs subject to the provision of building physics and in accordance with the structural requirements and the requirements of the manufacturer;
– insulating layer for ventilated roofs , which fits on the waterproofing , apply permissible in terms of building physics insulating materials.
To prevent possible infiltration of rainwater into the insulation layer is interrupted at work, we need to remain intact and watertight contiguity first waterproofing layer to the vapor barrier.
Almost all materials expand when the temperature rises and decreases when it is compressed . Water temperatures in the range of about ± ° C to 4 ° C ± exception, which can be seen to interrupt the water pipes , vessels and vehicles coolers . Plaster also crack when it freezes in the cracks penetrated rainwater.
Look at the scale of the thermometer. When heated, the thermometer rises , and when cooling – is reduced , that is used in everyday life to explain the cold weather or warming . In fact, expands when heated and contracts when cooled thermometer contained in a liquid ( mercury or ethyl alcohol ) . Mercury : the liquid metal is very toxic . Ethyl alcohol : kind of alcohol . Observe and compare also sagging electric wires in summer and winter . Also note the spaces between the steel rails .
Thermal insulation materials – is no exception . Different insulation materials exposed to them specific temperature deformations . Below are examples of thermal deformations in millimeters per meter at a temperature difference between plate 100 K depending on the material. These indicators may affect the average density , the production method and other factors .
Deformation temperature insulation materials can cause damage to the roof structure , especially in the waterproofing layer. This concerns reshaping materials of all kinds , such as shrinkage during the works (polystyrene ) , with simultaneous deformation of the influence of heat and moisture.
Must include measures to help avoid or reduce damage to structures and materials by changing their shape.
Slabs of rigid foam with a particularly strong edges (e.g. extruded foam) is separated from the waterproofing layer over the entire area by a spacer layer ( e.g. , glass fiber web or a polyester ) . So , when installing the foam sticking method used rigid plates with accurate dimensions, thermal deformation which occur less.
When using the conditions stored in the desired rigid foams during their operation occurs initial shrinkage, physical properties of materials due .
Preferred is the use of stable shape without dangerous stresses insulating materials that do not require protection from moisture prior to , during and after execution of construction works.