• for increased acoustic performance of buildings
• high sound insulation values
• improvement of acoustic comfort of housing
• high masonry strength

The masonry plastered on both sides with 15 mm thick lime-cement plaster has a laboratory airtightness Rw = 51 dB, which is a superior value due to the small thickness of the masonry brickwork built on mortar for thin joints. The wall meets the fire resistance rating of REI 120 DP1. 

These properties allow for a wide range of practical applications, e.g. for masonry in office buildings between offices or in apartment buildings for the walling of plumbing and elevator shafts, for partitions in bungalows and for other constructions requiring a higher requirement for sound insulation. In addition, the masonry can be used as a double-layer construction in acoustic partition walls of terraced houses and semi-detached houses. 

According to the ČSN 73 0532 standard for dividing walls of terraced houses, it is necessary to meet the value of weighted building airtightness Rw = 57 dB. These values can easily be achieved by doubling the HELUZ AKU Z 17.5 brick structure with a mineral wool separating liner with OH ≥ 100 kg/m³ and a total thickness of 20 to 100 mm. The sound insulation values of the HELUZ AKU Z 17,5 sanded brick double walls, as measured in the TZÚS, s.p. testing laboratory, are shown in the table. The measurements confirmed that the double brick construction, using a mineral wool liner with a minimum thickness of 20 mm, achieves a margin of more than 10 dB to meet the requirement of the partition wall of terraced houses Rw = 57 dB.

• Complete building system from one manufacturer (avoiding errors and inaccuracies, energy-efficient house)
• Internal thermal stability

HELUZ AKU Z 17,5 for load-bearing and non-load-bearing masonry with a specific shape resembling the letter "Z". The masonry plastered on both sides with 15 mm thick lime cement plaster has a laboratory airtightness of Rw = 51 dB, which is a superior value considering the small thickness of the masonry brickwork built on mortar for thin joints. HELUZ AKU Z 17.5 ground (375 × 175 × 249 mm) has a compressive strength of 20 MPa due to its robustness and unique geometry, which allows the design of internal load-bearing walls in particular. The masonry also has a very good thermal accumulation, which has a positive effect on the internal thermal stability.

A properly designed building, constructed with building components from a single manufacturer, achieves high homogeneity and therefore better thermal insulation parameters. The use of building components from one manufacturer simply results in better performance of the whole building.

The technology of single-layer masonry construction made of clay blocks must be taken into account from the initial planning stage of the project, so that all the principles of correct design - designing in a module, observing the required clearances of building openings and room clearances - are simply observed.

All technical data on the HELUZ construction selector website:
https://selektorkonstrukci.heluz.cz

Video – The Meaningful Concept (in CZ)