Refurbishment and Restoration

Upgrading of Hotel Terme

Terme Čatež, Brežice, Slovenia

View after the upgrading 1 | View after the upgrading
The hotel building’s floor area was increased by 50% by a vertical extension featuring cross-laminated timber, without any need for retrofitting the foundation.
Design: The hotel was built forty years ago a part of the spa and holiday complex Čatež in eastern Slovenia. The vertical extension of the building, originally built with masonry and concrete, was only possible using timber since the foundation of the existing building was already overloaded in parts. The extension with lightweight material increased the capacity of the hotel by two full floors. At the same time, the hotel was extensively refurbished, upping its category by one star. The hotel, an important employer in the region, is now an attractive destination for guests again.

Wood: Engineers and architects cooperated to develop a solution for adding two more storeys to the existing building. With the chosen approach, using the lightweight construction material cross-laminated timber, the two new storeys only weigh 6% of the existing four floors. Even a third storey was calculated to be possible. The load of the extension is rerouted through the new cross-laminated timber walls, serving as beams, to structurally more sound segments of the existing building. This way, the building still meets the required standards for buildings in seismically active areas. A structural retrofitting of the existing building was not necessary.
Before the Extension 2 | Before the Extension
Returning to the skeletal state 3 | Returning to the skeletal state
Extension with cross-laminated timber 4 | Extension with cross-laminated timber
The building grew by two storeys 5 | The building grew by two storeys
Skylights 6 | Skylights
View after the upgrading 7 | View after the upgrading
Basic information
Year of Completion |  2010
Investor |  Terme Čatež d.d., Brežice (SI)
Architecture |  Region Projektivni biro Brežice d.o.o., Brežice (SI)
Structural Engineering |  CBD d.o.o., Celje (SI)
Construction Time |  4 months
Number of floors |  4 + 2 additional storeys
Plot size |  1,798 m²
Gross floor area |  8,700 m²
Construction Costs (netto) |  around 700,000 € or 200 €/m² GFA

Technical aspects
Concept |  Timber frame construction with cross-laminated timber, two additional storeys set on top of four storeys of masonry
Woodworking |  Hoja d.d., Škofljica (SI)
Origin of Timber, Certification |  100% PEFC
Traceability of Timber |  yes
Energy Efficiency Standard |  B2 (Slovenia)
Energy Systems |  Geothermal heat pump
Energy Consumption  |  25-30 kWh/m²a
U-Value Wall | Roof | Floor | Windows (W/(m²K)) |  0,3 | 0,25 | 0,45 | 0,9

Energy Efficiency

Site Plan Site Plan Floor Plans Floor Plans