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Klimaholzhaus at the oberalbis

Redensification in sensitive Swiss landscape 

Die wohngesunden Brettsperrholzelemente von Lignotrend überzeugten den Bauherr, welchem ökologisches, baubiologisch richtiges und nachhaltiges Bauen am Herzen lag.

Mark Hofstetter from Glarus is convinced that wood is a fantastic material. For a long time, the architect had been planning to integrate the healthy cross laminated timber elements from Lignotrend into his building projects. The opportunity now presented itself to him several times, because the building owners Christian Rentschler and Esther Stüssi were also enthusiastic about the Klimaholzhaus philosophy. They commissioned the planner with two single-family houses and the conversion of a barn in a small hamlet in Switzerland. Together with the timber construction company Köfler from Zwillikon, exemplary buildings of the best Klimaholzhaus quality were created: they offer individual architecture, homely comfort and sustainable value retention. 

 

Configuration overview

Components used

  • LIGNO® Rippe Q3  |  Ceiling component

    Produktkode: LIGNO® Rippe_Q3_150-210_r0_s0_z0_p0_a0_625-621-4_WTL_gb_b0
    Statics


    The height of the load-bearing webs of the element is variable and determined according to static requirements from load and span. Within the framework of this configurator, the selection is limited to four height ranges. A more precise definition is made later during pre-dimensioning or verification with the LTB-x calculation programme. Bulk volume and/or necessary space for installations can also be decisive for the height.

    Statics 

    _150-210 Small span  

    Fire resistance


    If fire protection is required, an additional layer is added below the web area (for elements with strip profiles _z26, _z53, _z80, for elements with board profiles Akustik klassik _k50g). Their height determines the fire resistance duration of the cross-section from 30 to 90 minutes. The fire resistance must be statically verified. If there are no requirements, the standard versions _z0 or _k50l are to be selected.

    Fire resistance

    _z0 R0

    Cavity


    Panel designs with slat profiles and additional layer can be configured with an additional cavity (_p26, _p53) below the additional layer for installation guides, fixtures or to improve sound absorption. Cables laid there then do not penetrate the fire-protection layer. If required, the cavity is filled with insulating material (_p26mw, _p26ha) to improve acoustic absorption. If no cavity is necessary, the characteristic _p0 is selected.

    Cavity

    _p0 No cavity

    Room acoustics


    If the soffit of the element is to have a good sound-absorbing effect, the penultimate layer is configured as absorber _a50g. Otherwise, this layer is configured as a solid wood layer _a0.

    Room acoustics

    _a0 Without absorber
     

    Profile


    The visible layer is profiled with joints. The code for profiling indicates in millimetres: Element width, strip width (rounded, from/to if applicable) and joint width (rounded) as well as a letter identification for variants, e.g. with chamfered strip edges or with additional height gradation.

     

    Note: Some profiles indirectly cause exclusions for other configuration options.

    Profile 

    _625-621-4 Closed surface

    Wood type


    Various wood species are available for the visible layer. For quality reasons, individual wood species cannot be configured for all profiles; for technical reasons, surface treatments are excluded for some wood species.

    Wood type

    _WTL Silver fir knotless, patterned 

    Structure


    The face is subjected to a brushing _gb as standard, which produces a stronger or weaker structure depending on the type of wood and makes the surface less sensitive to scratches. Alternatively, a smooth sanding _gs can be carried out, or on request a bandsaw cut _grimitated.

    Structure

    _gb Brushed 

    Treatment


    Depending on the type of wood, the optional application of a surface treatment is possible ex works. Individual colour finishes are always sampled for coordination. For elements in individual lengths, colour treatment is limited to max. 5 m length.

    Treatment

    _b0 unbehandelt 

  • LIGNO® Block Q3  |  Roof component

    Produktkode: LIGNO® Block_Q3_230-290_rg0_s0_z0_p0_a0_625-621-4_NSI_gh_b0
    Installation top


    Whether the element is open or closed at the top is determined by the area of application. If, for example, the element is to be filled with fill on site as a storey ceiling or roof terrace (LIGNO® Rippe Q3-x), its cavities are open at the top (feature _r0). To guide pipes at the top of the element, a cross grid (_r25, _r50) can be added to some superstructures. For roof superstructures, there is usually a flat closed finish _rg0 (LIGNO® Block Q-x, LIGNO® Block Q3-x or corresponding versions of LIGNO® Acoustic classic).

    Installation top

    _rg0 Closed, without cross grid

    Statics


    The height of the load-bearing webs of the element is variable and determined according to static requirements from load and span. Within the framework of this configurator, the selection is limited to four height ranges. A more precise definition is made later during pre-dimensioning or verification with the LTB-x calculation programme. Bulk volume and/or necessary space for installations can also be decisive for the height.

    Statics

    _230-290 Medium span  

    Feuerwiderstand


    If fire protection is required, an additional layer is added below the web area (for elements with strip profiles _z26, _z53, _z80, for elements with board profiles Akustik klassik _k50g). Their height determines the fire resistance duration of the cross-section from 30 to 90 minutes. The fire resistance must be statically verified. If there are no requirements, the standard versions _z0 or _k50l are to be selected.

    Fire resistance

    _z0 R0

    Cavity


    Panel designs with slat profiles and additional layer can be configured with an additional cavity (_p26, _p53) below the additional layer for installation guides, fixtures or to improve sound absorption. Cables laid there then do not penetrate the fire-protection layer. If required, the cavity is filled with insulating material (_p26mw, _p26ha) to improve acoustic absorption. If no cavity is necessary, the characteristic _p0 is selected.

    Cavity

    _p0 No cavity

    Room acoustics


    If the soffit of the element is to have a good sound-absorbing effect, the penultimate layer is configured as absorber _a50g. Otherwise, this layer is configured as a solid wood layer _a0.

    Room acoustics

    _a0 Without absorber

    Profile


    The visible layer is profiled with joints. The code for profiling indicates in millimetres: Element width, strip width (rounded, from/to if applicable) and joint width (rounded) as well as a letter identification for variants, e.g. with chamfered strip edges or with additional height gradation.
     

    Note: Some profiles indirectly cause exclusions for other configuration options.

    Profile 

    _625-621-4 Closed surface

    Wood type


    Various wood species are available for the visible layer. For quality reasons, individual wood species cannot be configured for all profiles; for technical reasons, surface treatments are excluded for some wood species.

    Wood type

    _NSI Industrial quality 

    Structure


    The face is subjected to a brushing _gb as standard, which produces a stronger or weaker structure depending on the type of wood and makes the surface less sensitive to scratches. Alternatively, a smooth sanding _gs can be carried out, or on request a bandsaw cut _grimitated.

    Structure

    _gh Planed 

    Treatment


    Depending on the type of wood, the optional application of a surface treatment is possible ex works. Individual colour finishes are always sampled for coordination. For elements in individual lengths, colour treatment is limited to max. 5 m length.

    Treatment

    _b0 Untreated 

  • LIGNO® Uni Q3  |  Wall component 

    Produktkode: LIGNO® Uni Q3_110_625_NSI_gh_b0
    Statics


    The height of the load-bearing webs of the element is variable and determined according to static requirements from load and span. Within the framework of this configurator, the selection is limited to four height ranges. A more precise definition is made later during pre-dimensioning or verification with the LTB-x calculation programme. Bulk volume and/or necessary space for installations can also be decisive for the height.

    Element height

    _110 mm 

    Profile


    The visible layer is profiled with joints. The code for profiling indicates in millimetres: Element width, strip width (rounded, from/to if applicable) and joint width (rounded) as well as a letter identification for variants, e.g. with chamfered strip edges or with additional height gradation.

     

    Note: Some profiles indirectly cause exclusions for other configuration options.

    Profile 

    _625

    Wood type


    Various wood species are available for the visible layer. For quality reasons, individual wood species cannot be configured for all profiles; for technical reasons, surface treatments are excluded for some wood species.

    Wood type

    _NSI Industrial quality 

    Structure


    The face is subjected to a brushing _gb as standard, which produces a stronger or weaker structure depending on the type of wood and makes the surface less sensitive to scratches. Alternatively, a smooth sanding _gs can be carried out, or on request a bandsaw cut _grimitated.

    Structure

    _gh Planed 

    Treatment


    Depending on the type of wood, the optional application of a surface treatment is possible ex works. Individual colour finishes are always sampled for coordination. For elements in individual lengths, colour treatment is limited to max. 5 m length.

    Treatment

    _b0 Untreated 

  • LIGNO® U*psi  |  Insulation joist

    Produktkode: LIGNO® U*psi F_n_200
    Insulation joist


    The lower the U-value of a component and the lower the psi value of the details, the less heat is lost. This is precisely where the U*psi® cross-laminated timber insulating uprights from Lignotrend come into effect: They implement high insulating thicknesses in natural timber and minimise thermal bridges.

    Insulation joist 

    Fleece as chamber separation

Reference-related

Downloads

Project participants

  • ARCHmark Hofstetter

    Architect

    Dr. Joachim Heerstrasse 22

    CH - 8750 Glarus
     

    www.archmark.ch/

  • dipl.Architekt ETH/SIA

    Architect

    CH - 8750 Glarus
     

     

  • Köfler Holzbau

    Execution

    Hofibachstrasse 15

    CH - 8909 Zwillikon

     

    www.koefler-holzbau.ch/



     

  • Frank Brüderli

    Photographer

    Zentralstrasse 37
    CH - 8003 Zürich

     

    bruederlilonghini.ch/

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