Lahekalda apartment buildings comply with the requirements applicable to low energy buildings i.e. Energy Class B.
Lahekalda residential area sits on a 17 ha Maarjamäe limestone bank approximately 43 m above sea level. The five-story residential buildings in the planning area’s inner circle have an L-shaped layout plan. Use of the buildings’ territory is based on the principles of nonlinear planning. Division into plots is conditional – the residential buildings and parking spaces are located on their respective registered immovable; however, accesses to the buildings and parking lots as well as leisure areas with playgrounds for children are in common use by all residents.
Outside of Lahekalda residences are a fenced-in area for children and seating places for residents. The children’s area has a rubber safety floor and the sandbox is encased by a wooden cover. Common park areas benefit from landscaping, footpaths, lighted corner seating, and leisure areas with outdoor fitness equipment. Landscape architect Piret Müüripeal’s landscaping follows the principle of richness of color. Ornamental apple trees, cherry trees, bird cherries, maples, and rowan trees adorn the outdoor areas.
The apartment buildings’ architectural concept was created by architect Ilmar Klammer. The residential buildings each have two stairwells (A and B) and the different parts of a building cross in the corner of the L-shape. There is no access between the stairwells inside a building. The raised buildings built on stilts have a visually airy feel to them, while benefitting from windproof closed-in parts. The first floor mostly houses open parking and stairwell accesses. The midsection of each floor provides for apartment specific storage rooms and technical facilities. Each building’s first floor accommodates 38 parking spaces, 48 storage rooms, 2 bicycle storage rooms next to the elevators, required technical facilities, and a janitor’s closet for each stairwell. Apartments are located on higher floors. Nearly all of the apartments have a balcony with tinted glass railing. Balconies can also be glazed in upon request. Each apartment building’s waste disposal room opens to the sidewalk below the building.
The residential buildings sit upon reinforced concrete strip foundation. Exterior walls consist in three-layer prefabricated reinforced concrete panels, the exterior surface of which has been painted white or dark grey. Interior load-bearing walls are made of prefabricated reinforced concrete panels. Inserted ceilings consist in hollow panels. To muffle footfall sounds, mineral wool and a concrete leveling layer has been placed on top of the hollow panels. The roof is made from prefabricated hollow panels with a rolled roofing cover layer.
Sanitary room walls are made from lightweight blocks. Walls separating rooms are drywalls on metal structures; mineral wool is used for soundproofing. Walls separating apartments are reinforced concrete panel walls.
Each residential building has 2 stairwells and each stairwell has 1 elevator. Each stairwell also has a separate room for storing bicycles and strollers. Stairs are made from prefabricated reinforced concrete and have steel railings. Staircase landings and stairwell walls are covered with ceramic tiles and stairs are made from impregnated coated concrete.
The buildings have single frame triple-glazed PVC windows. The buildings’ front doors are sealed units in a metal frame. The apartments’ front doors are oak veneer covered wooden doors. Doors inside the apartments are, depending on the interior finishing package, either natural veneer, whitened oak veneer, or white panel doors.
Apartment walls are painted in light tones. Parquet floors are covered with one strip natural veneer. The walls and floors in sanitary rooms as well as mudroom floors are covered with 60 cm x 60 cm ceramic tiles. Sanitary rooms have suspended ceilings made from painted damp-proof plasterboard.
Heating for the apartment buildings comes from the City of Tallinn’s district heating network. Each building has a separate boiler room that produces domestic hot water. Rooms in the apartments benefit from convenient and energy efficient water-based radiant floor heating. Electric floor heating is designed for sanitary rooms. Stairwells also use water-based radiant floor heating. The building is equipped with a central bidirectional ventilation system. The apartment buildings are connected to the city of Tallinn’s water and sewage network.
The apartments’ electricity meters are located in each floor’s distribution boards. An apartment’s distribution board contains fuses and a low-current part. Electricity meter readings are sent via remote reading. The apartments are equipped with electrical sockets and switches, sanitary rooms and mudrooms have preinstalled lighting. For internet and television purposes, an optical cable has been installed as connected to each apartment’s switchboard. CAT6 cables have been used inside the apartments to allow for super-fast data transmission. Rooms are equipped with data transmission network modular sockets and electrical sockets. The doorbell intercom system is located in each apartment’s mudroom. Each apartment facilitates installation of surveillance alarm equipment.