Construction Methods

Haus Erdas - Società Cooperativa Sociale ONLUS

Via Sardegna 15, 09170, Oristano (OR)

Tel: 3338243430 | VAT NUMBER: 01201760954


Created by Christian Pircher


Wooden frame system


A traditional material for an innovative technology.

Our innovative technology with the wooden frame allows us to build with maximum precision, choosing between numerous variants and reducing to a minimum the assembly time, because the single walls are already provided as complete elements. This technique, an evolution of the beam system, utilizes delicate bearing structures, whose “heart” is the frame, realized with conifer wood dried in standard sections, whereas for the walls solid wood for construction is utilized. Capacity is guaranteed by a reinforced coating.

MHM – Solid wood walls


The single boards are built with grooves (in such a way that they increase the insulating value of the wall) and pressed together in a cross shape. Boards are put together with aluminium nails. This allows a really high stability. Raw elements for walls are cut with precision and provided with the appropriate openings. Moreover in this phase there could already be carvings and slots for electrical, sanitary and heating installations. The solid wood wall consists of untreated wood and is completely free from glues. This has a particularly beneficial effect on the environment climate and gives the walls the function to adjust humidity. The ones who take particular advantage of this healthy production are the allergic people.

Palisadio system


From the renewable raw material, wood, a twelve-sided solid section is produced. “Palisadio” solid wood houses are entirely built with this wooden profile. To create a wall, many of these wooden twelve-sided profiles are linked, without metal or glue, but with pure wooden connections (beechwood dowels) firmly attached to timber modules.

For the bigger components, the twelve-sided profiles are pressed hydraulically together and anchored between them. The twelve-sided wooden profile with 72 mm diameter is the base of Palisadio’s system.

Through the fixing system with wooden dowels they become extremely stable and resistant elements.

No nails, screws or adhesives are needed.



Cross-laminated timber


Cross-laminated timber consists of a minimum of 3 and a maximum of 9 finger jointed layers glued together on a surface. These big format solid wood boards are utilized especially for wall elements (but also for ceilings and roofs) in the modern wood construction. Thanks to the crossed overlapping of single lamellas, swellings and reductions of elements are reduced to an irrelevant minimum. For the laying PUR glue is utilized, free from formaldehyde and solvent free, in such a way that it doesn’t pose any health risk (emission class E0).

Blockhaus system



The “Blockhaus” building system consists essentially in the use of solid wood or lamellar wood of various essence and size, squared or rounded , with double or triple tongue and groove processing, the overlapped vertically between them until they form the bearing wall or partitioning walls.

The solidity and good performances in terms of thermal and acoustic insulation, its durability and living comfort, have without a doubt eased the diffusion of this building system of prefabricated wooden houses that appears to be very common especially in Northern Europe countries.

Lamellar board Glue and Nail-free



Construction made with solid wood with mechanic connections instead of chemical substances. Or more easily: wooden dowels instead of toxic adhesives. Beams and boards are set vertically, horizontally and diagonally to form compact construction elements. Beechwood dowels (completely dry) penetrate these beams or board layers to form a stable wall. So dowels draw residual humidity of the beams and swell indissolubly until they resist as a wood knot. Putting the walls together it becomes a unique and stable structure, respecting all construction norms.

Our goals are to offer a superior quality. The sawmill undertakes to cut the wood during the waning moon of the Christmas period. The best wood is indeed the one obtained from the felled trees, so when the vital activities of plants are naturally slowed. During winter wood porosity is reduced so trunks are more poor in sap. This ancient tradition confirms the durability of wood against mushrooms and insects, as it was already famous in all ancient cultures who built with wood. In Japan there are the most ancient wooden structures of the world (1600 years), among which the most ancient one, the Gango-ji temple.