Hiša trentarskih vodnikov
Na Logu v Trenti
The building is used as congress centre and to support social life of the local community.
State of repair
Aim of retrofit
Institute of the Republic of Slovenia for Nature Conservation
Tobačna 5. Ljubljana
Ing-arh, Polona Čeh s.p.
Kranjska cesta 4, 4240 Radovljica
Institute for the Protection of Cultural Heritage of Slovenia
Poljanska cesta 40, 1000 Ljubljana
Šlibar inženiring d.o.o.
Motnica 17, 1236 Trzin
Antona Skoka 7, 1230 Domžale
Ground floor_Stone masonry
First floor - timber frame structure with wooden facade and roof
Construction design of the exterior ground walls (stone masonry, λ = 1,7 W/mK) has changed only by adding a layer of thermal insulation (XPS 6cm, λ = 0,035 W/mK) which slightly improved it's thermal performance but still not enough to meet the conditions of a low-energy house. Since the ground floor in unheated and intended for garages and storage, thermal performance was not in the first place.
Traditional wooden roof was built in 1999 without any thermal insulation. Renovation in 2012 has altered the roof and the gables in terms of thermal performance. Thermal insulation layers were added in the roof assembly, gables were completely renovated and finished with vertically installed larch wooden boards. (Larch is a local tree).
The windows on the ground floor remained existing from 1999. New wooden windows on the gables and in the "porch" are divided by wooden beams into four glazed fields.
Roof windows were replaced with new energy efficient windows with double glazing.
MEASURES TO INCREASE AIRTIGHTNESS
Before 2012 there was no thermal insulation in the roof assembly. Thermal insulation was applied internally to maintain the existing wood shingle roof. Timber structure was also preserved. To improve the supply of a daylight in the conference room in the attic, various roof windows were installed with approval of the heritage office.
Flat concrete roof was originally built in 1936. In 1999 traditional pitched roof was built on top of the former flat concrete roof. Energy renovation of the attic took place in 2012.
The upper floor only.
DOMESTIC HOT WATER
The old heating system on fossil fuels (propane-butane) was replaced by a biomass boiler (wood chips). In the renovated building, there is a new boiler room with a Fröling furnace with a power of 150 kW with two storage tanks for 6000 liters of hot water. The biggest gain is efficient heating with significantly lower costs and locally supplied wood chips. The new heating system will supply the renovated building as well as the main building of the TNP museum and info center.
Boiler on biomass.
RENEWABLE ENERGY SYSTEMS
Biomass Heating System supplying two buildings.
Voluntary certificates: No
Primary Energy 24 kWh/m2.y
Consumption_estimation_After: 48 kWh/m2.y
Consumption_estimation_After: 24 kWh/m2.y
emissions_at_use_stage_after_intervention: 1.080 total