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LIGNO® Uni Wandelemente werden im Rohbau montiert

Bygningsfysik

Sikker design med træ

I modsætning til trækonstruktioner har udvendige komponenter fra Lignotrend en flerlagsstruktur: Den bærende trækonstruktion er helt på den varme side; den efterfølges af en tætningsmembran for at forhindre træk, varmeisoleringen i enhver ønsket tykkelse og endelig facaden. Fordi den diffusionsdygtige membran er anbragt på et beskyttet sted mellem det massive træ og isoleringsmaterialet, dækker hele overfladen selv ved knudepunkter og gennemføringer er elimineret, giver den ideelle betingelser for en enkel, men sikker udførelse. Risikoen for, at efterfølgende handler kompromitterer lufttætheden er minimal. Top lufttæthedsværdier opnås således regelmæssigt. Lignotrend konstruktionsprincippet er velegnet til alle energistandarder.

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Reliable flat roof constructions

Non-ventilated warm roof

In pitched roofs, rear-ventilated roof constructions made of LIGNO® follow laws that are unproblematic in terms of building physics. However, Lignotrend elements are also suitable for flat roofs without rear ventilation or low-pitched roofs if the construction is designed appropriately: in the case of flat roofs made of LIGNO®, a vapour-tight layer is arranged above the timber construction, on top of which come the pressure-resistant roof insulation and finally the seal – for example as a membrane roof, a tin roof or with roof greening. Thermal bridges are reliably ruled out through this so-called "warm roof" principle. Since the vapour barrier is inside the component, it is protected against damage over its entire area by the solid timber.

If construction height is to be saved, part of the insulation can be installed ex works in the element cavity in the cross-laminated timber box elements. From the aspect of building physics, this intermediate insulation is usually safe if it takes up less than 1/3 of the total insulation value of the construction. In case of doubt, proof can be provided by a dynamic component simulation.

Such a dynamic consideration (e.g. by means of the WUFI software) is recommended for all aspects that could impair the regular redrying potential of the construction, e.g. if the roof is shaded, greened and/or insulation is to be placed on the inside.

More about roof constructions
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Building physics competence

Targeted timber construction consulting

The Lignotrend consultants support architects and planners in questions specific to timber construction – reliably and in a targeted manner with building physics competence. In doing so, they can fall back on a pool of individual details.

Our consultantsTo the core competence fire protectionTo the core competence sound insulationTo the core competence indoor climate