Building tightness levels are becoming an increasingly important factor in construction. In order to operate buildings cost effectively, high thermal resistance of enclosures will not suffice, – you must have tight enclosures is well.
The building tightness test – simple, quick, clear
The building tightness test will allow everyone to understand the value of building or construction work. This test will show you if you are not overpaying for the house you are buying, or whether the construction work complies with the agreed price and quality requirements. The cost of this test will pay you back after the first or second month of heating, and you will continue saving later on. After all, none of us wants to pay for something which is not worth it.
Also, STR 2013.05.01:2013 “Building Energy Performance Design” which defines the level of tightness of new buildings, has entered into force from 2013-12-18. From STR 2.05.01:2013:
Buildings (parts thereof) of energy performance classes C, B, A, A+ or A++ must be so designed that their tightness, measured in accordance with LST EN 13829:2002 “Thermal performance of buildings. Determination of Specific Airflow Rate in Buildings. Pressure difference method” (modified ISO 9972:1996) [5.15] sets the requirements at a pressure difference of 50 Pa between the interior and exterior of the building which must not exceed the air exchange values given in Table 10.
Certification of energy performance of a building means a process regulated by legal acts in the course of which the energy performance of a building is established, the energy performance of a building is evaluated, attributing a building to a energy performance class, an energy performance certificate of a building is issued. In accordance with the Law on the Supplement to the law On Construction (No X-404, dated 17 November 2005) buildings are certified since 1 January 2009, except for newly constructed buildings which must be certified as from 1 January 2007. The energy performance class of newly constructed buildings (parts thereof) must not be less than C. The energy performance class of buildings (parts thereof) undergoing major renovation, with a useful floor area of more than 1000, square meters must be at least D. There are no requirements for the energy performance class of buildings for sale and lease (parts thereof).
We are perhaps the first to start offering this service in Lithuania. We continue to improve it. We perform only detailed modelling of energy performance of newly designed buildings. The service is mainly used for designers and builders of structures. Where are useful for designers as we help to ensure the required energy performance class of designed buildings. We are useful for builders because our thorough calculations allow cost saving use of materials eliminating their excessive use as well as purchases of excessively powerful engineering equipment and machinery.
The service includes:
Tightness testing of air handling units of various sizes and capacities
Tightness testing of ventilation duct system and parts thereof
Detection of leakage
Solutions to remove the leaks
Roof tightening tests
Sliding window tightness tests
Tightness testing of special premises
Calculation of air permeability
Testing of pressurised air pipes
Rain water penetration testing of curtain walls
Water-based fire extinguishing systems only provide primary fire extinguishing by sacrificing the property is that the premises. Archives, servers, data centres, exhibits, cable channels, other expensive assets and engineering in buildings are destroyed or damaged by water. For this reason, a need for gas extinguishing systems has emerged. In order to ensure the efficiency of such gas extinguishing systems, in-house systems testing and modelling are required.
The Integrity test determines the tightness of the room, the area of leakage, the possible time of gas concentration retention, the peak pressure, and the effectiveness of safety valves. In the case of unacceptable results, all leaks are detected with a smoke generator, thermovision or ultrasound, and a recommendations for rectification of defects str made.
This test is carried out only by certified technicians using calibrated equipment as well as by an accredited laboratory.
Our specialists not only carry out the tests, but also consult at the design stage of such premises.
Services are performed in accordance with NFPA and ISO standards.
Most often, we find leaks in various structures with the help of thermovisors or smoke generators. However, the use of a thermistor requires a difference in pressure and temperature. Non-tight areas are also detected with pressure difference, using a smoke generator. The situation becomes difficult when we cannot cause a pressure difference, in absence of efficient temperature difference, untightnesses in hard-to-reach places where smoke generator no longer helps.
In such complex cases, an ultrasonic device is used. It helps detect a variety of leaks, even in the absence of temperature differences, no pressure difference, and even in hard to reach places.
Usually we use ultrasound tests for: