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Project / Design and build

Attic in the Quiet Centre, Riga

A historic building in Riga's Quiet Centre (Klusais centrs) gained a new seventh floor: the attic is being converted into an apartment. The load-bearing solution is a timber frame with steel beams up to 13 metres and glulam, fabricated and installed right on site under a weather shelter.

View from the new attic floor over the rooftops of the Quiet Centre
View from the new floor over the rooftops of the Quiet Centre.

Building data

Project Attic conversion into an apartment: a new seventh floor on an existing building
Location Quiet Centre (Klusais centrs), Riga
Structure C24 timber frame with HEB260 steel beams (S355) and GL24h glulam beams
Spans Steel beams 6.3 to 13.0 m; glulam cross-sections up to 160×400 mm
Dimensions Floor frame approx. 30.5 × 13.0 m in plan
Our role General contractor: structures fabricated and installed on site
Quality To LVS standards and the Latvian building codes: steel structures to LVS EN 1090-2 (class EXC2), C24 timber and GL24h glulam with CE marking, a product passport with the set of declarations of performance
Status Load-bearing structures completed and documented in October 2026

Where we start

The old attic before the works: exposed walls and layers of past decades.
The old attic before the works: exposed walls and layers of past decades.
The old steel and timber floor before replacement.
The old steel and timber floor before replacement.
The old layers: brick masonry and wallpaper remnants next to the new concrete band.
The old layers: brick masonry and wallpaper remnants next to the new concrete band.

Process

The building under a weather shelter: work goes on under cover while the rest of the building lives on.
The building under a weather shelter: work goes on under cover while the rest of the building lives on.
Dismantling the old roof and attic down to the masonry walls.
Dismantling the old roof and attic down to the masonry walls.
Installation day from the site camera: steel beams and timber elements in place.
Installation day from the site camera: steel beams and timber elements in place.
The new floor beams with a view over the rooftops of the Quiet Centre.
The new floor beams with a view over the rooftops of the Quiet Centre.
Installing a glulam beam at the stairwell masonry.
Installing a glulam beam at the stairwell masonry.
An assembled frame wall: C24 studs, doubled studs at the openings.
An assembled frame wall: C24 studs, doubled studs at the openings.
Rafters and the spaced board sheathing for the roof diaphragm.
Rafters and the spaced board sheathing for the roof diaphragm.
Sheathing up to the ridge: the roof plane ready for the underlay.
Sheathing up to the ridge: the roof plane ready for the underlay.
The enclosing layers: stone wool and the vapour barrier.
The enclosing layers: stone wool and the vapour barrier.
The roof edge detail: standing-seam metal and a timber parapet.
The roof edge detail: standing-seam metal and a timber parapet.

Result

A room on the new floor: fire-rated plasterboard and windows facing the courtyard.
A room on the new floor: fire-rated plasterboard and windows facing the courtyard.
The large room before finishes: the window band facing the courtyard and the sloped ceiling.
The large room before finishes: the window band facing the courtyard and the sloped ceiling.
The tall room with window doors onto the roof terrace.
The tall room with window doors onto the roof terrace.
The insulated and rendered fire wall: the building has a new seventh floor.
The insulated and rendered fire wall: the building has a new seventh floor.
The finished seventh floor from outside: sheet metal cladding and roof windows.
The finished seventh floor from outside: sheet metal cladding and roof windows.
The new floor in the Quiet Centre roofscape.
The new floor in the Quiet Centre roofscape.

Need an extra floor or a conversion of an existing building?

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