Wood House Prefabrication

House Prefabrication Process

Precise planning, organization of wood house prefabrication and productive equipment ensure timely and precise execution of the technological process. ZTC believes in applying this principle to all stages of element house prefabrication. This applies to material workpiece sawing to specified dimensions, their transfer to assembly posts, assembly of finished components, their packaging and transporting to the finished product warehouse. Afterwards, the next stage sees the finished panels and wood components transported to the construction site. On the site the prefabricated panels are assembled to form a building. Such house prefabrication planning allows for fast and high quality construction. Furthermore assembly is possible in places that are difficult or even impossible to reach with large construction equipment.

Composition of the Panel

We achieve excellent thermal insulation and increased fire safety of wood structures. We do this by laying fire safe insulation material in the building component panels in several layers. So there are always layers of fireproof materials covering wood components (studs, rafters and beams). We use an industrial insulation system to lay cellulose or wood fibre wool insulation where the amount and density of insulation is computer controlled for highest quality and productivity. These insulation materials essentially have the same heat insulation properties as wood since they are based on wood fibre, absorb and release humidity to keep a stable humidity level indoors but have better sound insulation properties than wood.

Find out more about insulation in our panels!

We clad the load-bearing structures of a wood panel house from the outside with air barrier sheets. Next we overlay it with a windproof membrane. Therefore we ensure good hermetic properties and prevent heat losses. On the inside of the panel we overlay thermal insulation with an active vapour control layer. This protects the separating structures of the building and insulation from the humidity indoors (vapour). It also improves the microclimate in the room.

Specialists glue wind barrier connections to constructive elements and interlapping with special tapes inside the ZTC factory so that the efficiency of thermal insulation is not decreased. Fire safety of the building can be increased by using fireproof materials in the finishing of the facade and interior.

If the client requires, we can thicken the timber frame of the building with extra thermal insulation. This is how we can make components of passive houses which increases construction costs but leads to increased thermal resistance and subsequently decreased heating costs.

Durability

Wood is very durable which allows its use in places that need to bear large loads, weights and strains. Wood dried to the right level of moisture can last for a very long time that can span centuries. ZTC uses wood materials of C16 (in least significant structures like partition walls) and C24 (for load-bearing structures) norms of durability for wood structures of buildings. This wood is industrially dried and calibrated afterwards, then sorted by level of durability and marked with CE conformity marking according to EU norms. When necessary depending on the place of use of wood materials ZTC processes or impregnates the wood materials with specific wood protection solutions that significantly increase the lifespan of wood.

For buildings of more than three storeys or panels for long spans we use CLT panels. We use high quality CLT materials from our partner company Cross Timber Systems.

House Prefabrication: Interior and Exterior Finishing

The most common choice for siding is siding planks that are painted with lasures (leaving the wood structure visible) or acrylic paints that cover the wood structure completely or partially. A very wide variety of colour tones is available. Siding planks are painted indoors where the process is not influenced by weather. This significantly improves the quality of the facade and its lifespan. Planks of a variety of wood species are available such as spruce, pine tree, larch, exotic wood etc.).

The next most common exterior finishing is plaster (also known as rendering, stucco). Other panel, tile and slab materials are also often used. Clients can choose to have a ventilated or non-ventilated facade.

ZTC offers various types of facade siding according to client’s wishes:

  • brick or stone veneer;
  • plaster or decorative plaster;
  • metal profile;
  • brick or stone tiles;
  • various woodchip and cement fibre construction slabs;

The possibilities for interior finishing are unlimited. The basic options are:

  • wood;
  • various woodchip and cement fibre construction slabs;
  • plasterboard;

ZTC can provide full spectrum of finishing works and services for a project

Prefab house assembling koka mājas

Live in harmony with nature

Timber frame panel houses are environmentally friendly because they effectively combining quality natural materials with the latest scientific advances in construction. Construction technology has achieved the optimal balance between thermal insulation and breathability which is beneficial to the health of residents of the building. By using an industrial insulation system we can prefabricate panels with ecological cellulose (recycled newspapers) and wood fibre insulation much more qualitatively than with conventional methods used.