We make factory manufactured plane elements with wooden frame construction – wall, floor, ceiling and roof elements – made of ecologically clean and healthy materials. Puumajatehase OÜ’s production standards enable to fulfil special requests of the customers and allowcompleting of architecturally demanding projects. In production of elements we follow the principle whereby the house will be to the maximum extent built in the factory to reduce the part of the work on the construction site.
The advantages of factory manufactured plane elements with wooden frame construction compared with competitive products:
Requirements for heat retention and energy performance are developing constantly. . The structures and technical solutions used by Puumajatehase OÜ make it possible to build low-energy consumption buildings that are in line with customer preferences and valid regulations and standards. Using of high-quality material and modern technological solutions play a key role in ensuring good energy performance of houses built of our made house elements . A low-energy house consumes just half of the energy required by a standard building. Good energy performance is achieved by better insulation and windows coupled with heat recovery ventilation. The heating system in a low-energy building has annual energy consumption on the order of 50-60 kWh/m2.
The heat conductivity of the building shell is expressed as a U-value (W/m²K), which shows how many watts (W) pass through one square metre of external wall when the temperature differential on opposite sides of the wall is one degree. The mathematical specific heat capacity and thermal resistance of homogenous and non-homogenous material layers are calculated pursuant to the EVS-EN ISO 6946-2008 standard. Non-homogenous material layers where the specific heat capacity values of the materials vary more than fivefold are calculated as cold bridges
Thermal conductivity for building shell components:
Puumaja standard structures and minimum requierments
External wall 0,17 W/ m²K 0,25 W/ m²K
Roof 0,98 W/ m²K 0,20 W/ m²K
Windows 0,9 W/ m²K 1,1 W/ m²K
Doors 0,9 W/ m²K 1,1 W/ m²K
Air permeabilityplays a major role in achieving low-energy consumption. Air permeabilityhas an extensive impact on heating and cooling costs and also influences moisture issues related to the building shell (growth of mould and mildew, condensation of moisture), overcooling of the shell surfaces and the quality of the indoor climate.
The air permeability of the outer shell is measured in terms of the amount of air (l/s or m³/h) that passes through a segment of shell with a 1 m2/area with an air pressure differential on opposite sides of the wall (usually 50 Pa). It isn’t possible to take separate measurements of the air permeability of different parts of the shell in a finished building and thus the air permeability of the entire building is measured and expressed as the average of the values of all parts of the shell. The most typical method for measuring a leak of air is “BlowerDoor,” which uses a standard methodology with a version that has been adopted in Estonia as well. EVS EN ISO 9972:2015 “Thermal performance of buildings – Determination of air permeability of buildings – Fan pressurisation method”.
As a rule, the maximum value of air leak in the building shell is set at 0.60 l/s m2.
We are pleased to say that Puumajatehase OÜ products have achieved a value of 0.34 l/s m2, which is an excellent result.
The acoustic classification of homes pursuant to the INSTA 122 standard in the Nordic countries
Sound insulation between apartments Class A Class B Class C Class D
Air nois insulation index R’w, dB 63 58 55 50
Impact noise level index L’nw, dB 43 48 53 58
Sound class A: 90% of residents say the acoustic conditions are good or excellent.
Sound class B. 70% to 85% of residents say the acoustic conditions are good or excellent. Less than 10% say the conditions are poor.
Sound class C: 50% to 65% of residents say the acoustic conditions are good or excellent. Less than 30% say the conditions are poor.
Sound class D: 30% to 45% of residents say the acoustic conditions are good or excellent. 25% to 50% say the conditions are poor.
The well-being and satisfaction of residents depend on their home being shielded from noise. Noise can be generated by the residents themselves or neighbours, with home appliances or equipment located in the building and residential units. Noise can also enter indoor areas from outside.
Protection against noise is ensured by technical solutions used in the shell structures and well-chosen and installed soundproofing. Precise execution of the construction of structures between storeys and the walls between units is particularly important. Rational, noise-insulating technical solutions for external walls and doors and windows are also key.