ALLGEMEINE INFORMATIONEN RENOVIERUNGS-PROZESS SANIERUNGS-LÖSUNGEN BEWERTUNG

Klitgaarden

Klitgaardsvej 4

3390

Hundested, Dänemark

Besitzer

Thomas B. Svendsen

Klitgårdsvej 4, 3390 Hundested

Ansprechpartner

Ernst Jan de Place Hansen

Department of the Built Environment/Aalborg University

deplace@build.aau.dk

Building seen from North, after renovation

The building is located in Hundested, in the northern part of Zealand about seventy kilometres northwest of Copenhagen, Denmark. Klitgaarden is a free standing single-family house from 1875 in two stories with a total of 221 m2. The building is erected with solid masonry walls and a foundation of granite boulders on top of a stone foundation. The renovation project of the building aimed for a minimum heating requirement and a preservation of original outdoor facade details. It was finished in 2016. The renovation was motivated by a very high-energy demand for heating and in general the fact that the house had not been used in twenty years.

ALLGEMEINE INFORMATIONEN RENOVIERUNGS-PROZESS SANIERUNGS-LÖSUNGEN BEWERTUNG

Energieeffizienz

no data available

Klimazone Cfb

Höhe über dem Meer 4 m ü.d.M.

Heizgradtage 232

Kühlgradtage 0

Unterschutzstellung nicht geschützt

Ensembleschutz:
Nein

Stufe der Unterschutzstellung:

Baualter 1850-1899

Letzte Sanierung:
1976

Gebäudenutzung Residential (rural)

Gebäudebelegung:
Permanently occupied

Anzahl der Bewohner/Nutzer:
3

Gebäudefläche Nettogeschossfläche [m²]: 221,0

Gebäudetyp:
Detached house

Anzahl der Stockwerke:
2

Keller ja/nein:
Nein

Anzahl der beheizten Stockwerke:
2

Thermische Gebäudehülle [m²]:
466,0

NGF Berechnungsmethode:
Danish Standard DS 418

Bauart

Brick masonry wall

Außen:
Exposed brickwork

Innen:
Plastered (on hard)

Dach:
Pitched roof

+ MEHR - WENIGER

Building seen from South, after renovation

Building seen from East, before renovation

Building seen from NorthEast, during renovation

Building seen from East, after renovation

Building seen from NorthWest, before renovation

Location of Hundested, https://www.google.com/maps/place/3390+Hundested/@55.9612834,11.849252,13z/data=!4m5!3m4!1s0x46520bc36ea52ad5:0x1b3bcc84af790b3!8m2!3d55.967747!4d11.8589619

https://www.youtube.com/watch?v=NxQ8-Btjv-A

RENOVIERUNGS-PROZESS

Architektur

BESCHREIBUNG

Klitgaarden is a free standing single-family house from 1875 in two stories with a total floor area of 221 m2. The building was erected with solid masonry walls and a foundation of granite boulders on top of a stone foundation. The gables are one brick thick while the facades are one and a half brick. Windows are with wooden frames and single layer of glass. The building has a thatch pitched roof. Apart from two skylights in the roof, this makes the building a typical Danish example of a house outside a city from the period 1850-1920 (these houses were either with or without external rendering). Further details about this type of houses can be found (in Danish) in http://huseftersyninfo.dk/file/569461/2landhus1850-1920.pdf A comprehensive renovation was finished in 2016 (early 2017)

Städtebaulicher Kontext

Hundested is a small city at the sea. About 8.600 inhabitants

Erhaltungszustand

Erhaltungszustand der Gebäudehülle

Due to the state of the hundred and forty-year-old building and the owner’s demands the renovation was initiated. The building was very costly to heat with means of electric radiators and electric water heater and had very poor windows. Applying interior insulation might have been chosen in contrast to the poorly maintained thirty-millimetre exterior insulation which had also changed the appearance of the building. Thus motivation was not only to reduce energy use to an absolute minimum but also to somewhat restore the building’s architecture.

Haustechnische Anlagen vor Sanierung

No information on the building services available. The building had not been used for the last 20 years.

DENKMALWERT

ERHALTENSWERTE ELEMENTE

The building is not categorized as a building worth preserving. The owner wanted to reestablish the external side of the outer wall (brick masinry without render)

Denkmalwert und wie er bestimmt wurde

The building is not a listed building, according to https://www.kulturarv.dk/fbb FBB is the Danish homepage for listed and preserved buildings

Ziel der Sanierung

Renovation

The building was very costly to heat with means of electric radiators and electric water heater and had very poor windows. Applying interior insulation might have been chosen in contrast to the poorly maintained thirty-millimetre exterior insulation (added in 1976) which had also changed the appearance of the building. Thus motivation was not only to reduce energy use to an absolute minimum but also to somewhat restore the building’s architecture.

Gewonnen Erkenntnisse / besondere Erfahrungen

It was possible both to improve the energy performance (although at present no exact data on how much was saved) and restore the original expression of the building

Eingesetzte Software/Berechnungstools

Folgte die Sanierung einer spezifischen Methode? Nein

RIBuild_D3.2_v1.0_1.pdf

SANIERUNGS-LÖSUNGEN

Außenwände

Solid masonry wall

80 mm of internal insulation was added to the wall. Sensors are installed in all external walls. In addition to the built-in sensors, some reference sensors are placed inside and outside. The sensors are somewhat focused in the northwest and southeast end of the building. Roof and first floor is not monitored. The built-in sensors measure relative air humidity and temperature in the interface between masonry and insulation to assess the moisture condition in the interface. Additionally, some practical measurements are carried out with Karsten Tube, Troxler and HF. 15 mm of insulation was installed in the window sills to reduce thermal bridges.

The existing external insulation (added in 1976) was removed as part of the renovation process, bringing the external facade back to the original look

Renovated building seen from one of the gable facades

U-Wert (vor Sanierung) [W/m2K]: 1,4 W/m²K U-Wert (nach Sanierung) [W/m2K]: 0,3 W/m²K

Mehr Details

Aufbau Bestandswand

Render - Lime-cement mortar:
10 mm

Brick :
350 mm

Render - Lime-cement render:
3 mm

Aufbau sanierte Wand

Insulation - Inner layer of retrofitted wall consisting of a cover layer, the insulation and a fixing layer (ensuring contact to the existing wall):
100mm

Render - Lime-cement mortar:
10 mm

Brick :
350 mm

Render - Lime-cement render:
3 mm

Fenster

Ground floor window

Skylight

Ground floor window

The old wooden window has been renovated and reused as the wooden parts were in good condition. However as the building is situated close to the coast in an aggressive environment, the owner has considered to replace with Wood/Alu frames to avoid maintenance externally. The glazing bar has been partially removed making it possible to replace three smaller panes with one larger

Some parts of the window were maintained (e.g. frame)

Bestandsfenster U-Wert Glas [W/m2K]: 5,8 Neues Fenster U-Wert Glas [W/m2K]: 0,7

Mehr Details

Fenstertyp Bestand	Casement window
Verglasungsart Bestand	Single
Verschattung Bestand	NA
Ungefähres Einbaujahr	2016

Neuer Fenstertyp	Casement window
Verglasungsart des neuen Fensters	Double
Verschattung des neuen Fensters	NA
Neuer Energiedurchlassgrad g [-]	0,73

Skylight

Replaced from single layer to triple layer windows

Three layer window (6-12-4-12-4) with one layer 6 mm laminated energy glass and one layer 4 mm hardened glass. It was not possible to keep the old frame due to bad condition

Neues Fenster U-Wert Glas [W/m2K]: 0,7

Mehr Details

Fenstertyp Bestand	NA
Verglasungsart Bestand	Single
Verschattung Bestand	NA

Weitere Maßnahmen

DACH

ERDGESCHOSS

SONSTIGES

MASSNAHMEN UM DIE LUFTDICHTIGKEIT ZU VERBESSERN

DACH

Thermal insulation was added at the inside of the roof

The roof cladding is of the same type (thatched roof) as before; changes were made at the inside only (adding insulation)

Building after renovation of facades and roof

U-Wert (nach Sanierung) [W/m2K] NA

Mehr Details

Aufbau Bestandsdach

Other - Thatched roof:
200 mm

Other - Wooden laths:
50 mm

Other - wood wool?:
50 mm

Other :
100 mm

Aufbau saniertes Dach

Other - Thatched roof:
199 mm

Other - Thermal insulation:
135 mm

Other - Vapour barrier:
1 mm

ERDGESCHOSS

New ground floor including floor heating and thermal insulation

Floor heating was added at renovation but hidden in the concrete slab

Mehr Details

Aufbau Boden/Kellerdecke im Bestand

Concrete slab :
101 mm

Floor joists :
0 mm

Other - Floor boards:
0 mm

Aufbau Boden/Kellerdecke nach Sanierung

Insulation :
230 mm

Concrete slab :
100 mm

SONSTIGES

Drain around the building Water proofing of foundation This was done due to the building being quite moist and smelly

This part of the renovation is not visible when finished, i.e. does not change the expression of the building

Preparing the building for drain and water proofing

MASSNAHMEN UM DIE LUFTDICHTIGKEIT ZU VERBESSERN

As part of renovating the roof a vapour barrier was applied

HVAC

HEIZUNG

LÜFTUNG

HEIZUNG

The building was heated with electric radiators and electric water heater. This is replaced by floor heating and a heat pump

The new heating system is less visible than the old one. Radiators was not part of the original building, i.e. the building has now a more original expression

Mehr Details

	Heizungssystem nach Sanierung	zusätzliches Heizungssystem nach Sanierung
Art der Heizung	Heat pump	Ground heat
Brennstoff	Electricity
Wärmeverteilung	Air	Radiating floor
Nennleistung	10 kW	kW

LÜFTUNG

As part of the renovation a mechanical ventilation with heat exchanger was installed to ensure a good indoor climate, also in periods with no one using the building. The ventilation was installed with a separate heating coil to make it possible to adjust the heat faster than allowed by the floor heating.

Mehr Details

Aufbau Bestandsdach	Neues Lüftungssystem
Lüftungstyp
Type flow regime
Wärmerückgewinnung	Ja
Feuchterückgewinnung
Nennleistung	capacity 345 m3/h kW
Elektrische Leistung	kW
Regelung

Energieeffizienz

Energieausweis Nein
Freiwillige Zertifikate Nein

Energievrabrauch

Primärenergie
Berechnungsmethode NA
Energieverbrauch incl Brauchwarmwasser Nein

Gemessene Parameter

Raumklima
Type_of_monitoring: Continuous
Description: Relative humidity and temperature each 30 minutes at two locations in the building since 01-01-2018

Documents:

RIBuild_D3.2_v1.0.pdf

Außenklima
Type_of_monitoring: Continuous
Description: Relative humidity and temperature close to the building each 30 minutes since 01-01-2018

Bauteile
Type_of_monitoring: Continuous
Description: Relative humidity and temperature at seven locations within the construction each 30 minutes since 01-01-2018. Most sensors are positioned between insulations and brick mansonry

Kosten

Finanzielle Aspekte

The cost of the renovation is not public available. The cost for the energy saving measures is estimated to be about half the total cost.