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Cross-laminated timber when building a wooden house
Cross-laminated timber when building a wooden house
Video: Cross-laminated timber when building a wooden house
Video: ELEMENT Buildings | Construction CLT Cranberry Farm 2023, February

A complete wooden house can be built from cross-laminated timber from the basement to the roof. Just one of many advantages: It is very quick. Find out more about cross-laminated timber, its production and use here.

When building a wooden house with elements made of cross-laminated timber, the solid, diffusion-open cross-laminated timber prefabricated parts are prefabricated according to the individual plans of the architect, building owner or carpenter. The carpenter orders walls, ceilings and roof from the factory, where the delivery is picked. For each cross-laminated timber element, longitudinal layers of cross-glued single-layer boards, so-called blockboards, are glued with cross boards - the multi-layer crossing makes the element solid, firm, dimensionally stable and seamless.

Polyurethane glue (PU glue) that is free of poisonous substances and open to diffusion is used as the glue. It is waterproof and resistant to the bleaching UV rays of sunlight. The surfaces of ceilings, interior and exterior walls can be seen without time-consuming and money-intensive treatment: Most wooden house builders leave them in their natural color, others color them, plank them or plaster them.

Large spans in the wooden house

If you are planning a wooden house with vertical wall elements, you can insert it up to the floor or in one piece over several floors - each of the cross-laminated timber elements acts as a stiffening pane. With horizontally installed elements, the production length of 24 meters is used economically. Combinations of vertical and horizontal installation of the wall elements optimize the statics of the wooden house - the components are partly beams, partly stiffening panes. The opening percentage of external walls should be between 15 and 40 percent - if you plan carefully and cut out openings instead of cutting them out of the elements, waste is minimized.


Thanks to the elements made of cross-laminated timber, the prefabricated house can be erected very quickly.

Photo: Brüninghoff

Cross-laminated timber is particularly resilient

The cross laminated timber elements meet all requirements for statics and stiffening, fire protection and building physics for the construction of a wooden house - the elements are dimensionally stable and highly resilient, smooth and seamless. Wall elements are connected to one another with so-called external springs: square timbers are inserted into the pre-milled grooves, an additional band made of synthetic rubber per groove closes the connections in a wind and heat-tight manner. The ceiling and roof elements of the wooden house are delivered in visible quality, to the millimeter according to plan. The elements are connected to a stiffening ceiling or roof pane using bumpers.

Assembly from prefabricated elements

The walls are placed directly on the ceiling and fixed with two screws on the narrow side during assembly. In order to facilitate assembly, alignment strips are often used. Then the foreign spring is set and the next wall element is mounted, again fixed to the ceiling with two screws. Once the entire wall is in place, the elements are screwed tightly onto the ceiling from the inside. A planed squared timber is placed under the connection between the wall and the ceiling.

Profiles made of synthetic rubber (EPDM = ethylene-propylene-diene monomer) seal the joints reliably and decouple footfall and structure-borne noise. On concrete ceilings, the walls are also mounted on a planed larch threshold, which compensates for unevenness in the subsurface. Sealing and sound decoupling are also carried out here by EPDM profiles. The walls butt against each other at the corners, the carpenter seals the seam with EPDM tape and connects the elements with screws.


The wooden elements are manufactured in the factory and delivered to the construction site ready for assembly.

Photo: Brüninghoff

Inexpensive: quick assembly of the elements

Cross-laminated timber is multi-layered and made entirely of solid wood. The modern building material results in massive prefabricated parts made of wood that can insulate heat and at the same time carry loads. In addition, they are fire-proof and soundproof, can be installed dry quickly and have a positive impact on the well-being of wooden house residents.

The flat, seamless surfaces and the special structure guarantee precisely defined building physics, fire technology and mechanical properties. Cross-laminated timber can be used universally and can be easily combined with other materials. The surfaces can be used natural or color treated. Installation is quick and inexpensive: the carpenter installs lifting devices on the elements, they look like large pliers. A crane lifts the elements, the woodworker brings them into their exact position and fixes them.

Comfort in a wooden house: "Breathable" building material

The planned building physics can be easily implemented and easily checked - for many timber house planners and builders one of the greatest advantages of cross-laminated timber construction: solid wood walls without foils and complicated details. Planning is simple, construction is simple - and the wooden house built can be checked so easily. By gluing longitudinal and transverse layers, the “working” of the wood is reduced to a negligible level; as a result, the requirements for a modern building material are met.

Installations directly in the wall elements

Electrical installations in the wooden house can be run directly in the wall elements, which saves milling work. In walls with multiple grooving, cables run in the inner groove instead of the external spring, creating an installation channel every 125 centimeters. Installations are usually installed on the top of the ceiling and where necessary the cables are routed to the underside through the ceiling. An additional groove in the longitudinal edge of the element enables the cables to be routed directly in the ceiling. It is usually installed during the assembly of the ceiling elements, but openings, installation shafts and holes can also be retrofitted at any time.

A narrow external tongue is used in wall elements with a single groove in order to be able to take advantage of the installation dimensions of 125 centimeters. After mounting the wall, the electrical sockets are placed and wired in the desired positions. Water pipes are usually installed in the floor structure - radiators, cisterns and front panels are mounted directly on the wall elements.


A wooden house made of cross-laminated timber elements requires all requirements regarding statics, bracing, fire protection and building physics.

Photo: Brüninghoff

Load-bearing ceilings in a wooden house

Mounting plates or mounting loops are attached to the ceiling components, the elements are lifted and positioned. Both longitudinal edges of the ceiling elements are profiled on the top with a step fold, they are butted against each other - a fold is created, into which the professional push boards are glued and screwed tightly. In this way, the carpenter connects the ceiling to a large surface; it acts as a stable, stiffening disc.

The ceiling elements are flush with the outer walls of the basement, the upper floor walls are placed directly on the ceiling elements. On outer walls higher than one floor, the ceiling elements are hung on the inside on a wooden or steel beam that is screwed to the outer wall. Alternatively, all-round milling in the wall elements enables the ceiling elements to be connected without additional support, but this requires a wall thickness of at least 148 millimeters.

The weatherproof roof

The craftsmen screw the roof elements to the supports, i.e. ridges and purlins, wall elements and beams. The longitudinal edges of the roof elements, like the ceiling elements, are profiled on the top with a step fold. The roof parts are butted against each other, a bumper board is placed in the fold, glued and screwed together. The roof is connected to a large-area plate and stabilizes the construction as a stable pane. The roof elements can be stretched from the ridge to the eaves - i.e. falling - or horizontally from the gable wall to the gable wall. EPDM profiles are located between the element and the support for sealing and decoupling the sound transmission, the screws are screwed directly through the roof element.

Calculate the wooden house inexpensively, save wisely

If you include the component dimension of 125 centimeters in the planning, you avoid costly waste. The manufacturer provides planning blocks and wooden strips for model making on a scale of 1: 100. The manufacturer offers bar stock as a basic module, it is calculated per cubic meter. The carpenter or timber construction company ties off the modules according to the client's plans. Alternatively, the company can order ready-made kits.

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