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PREFABRICATED WOODEN HOUSES sensitive to dampness' ?

MANY AREAS OF OUR COUNTRY ARE SIGNIFICANT RATES OF WATER VAPOUR FOR LONG PERIODS OF THE YEAR. How does PREFABRICATED HOUSES IN THE FACE OF A PERSISTENT MOISTURE CONDITIONS 'AND REMEDIES YOU CAN TAKE FOR EFFECTIVE PROTECTION OF TIMBER?

Crivellaro Dear Architect, I have a prefabricated house built two years ago in the hills of Lake Garda. The problem that arises now is from 2 winters the high humidity (60-68% in winter, as measured by an electronic instrument), too high for a wooden house. I did this all to the company of prefabricated houses, which I recommend that the controlled mechanical ventilation (when I bought the house have not even mentioned). Now, since the problem is obvious, I say that the area is too wet, advising this unit.

suggest that you first read this old article on , noting that, in the presence of constant moisture, the house must be designed carefully. Care should be technical, even before the company's prefabricated houses, the choice of construction techniques for more effective protection of the structure and insulation.
first answer (a little 'brutally) to his request with a question: where was his architect when he chose to build with this firm?
Companies of prefabricated wooden houses should provide a consultancy service to the customer and appropriate suggest the most appropriate solution to the realization and effective area with respect to bio-climatic and specificity, however, the role of technical and fundamental choices in engineering properties for any reason and should not fall solely on the client.
In some cases it is advised not to construct the building as a prefabricated house or suggest a package of non-hygroscopic and adequately protected outside (perhaps by increasing the thickness of the outer coat).
regard to controlled mechanical ventilation with heat recovery , this is a plant whose purpose is primarily to the replacement full of air inside the building, minimizing heat loss. A positive side effect is certainly maintaining a moisture content more acceptable, since excess moisture is expelled outside. There are quite sophisticated systems that allow to cool and dehumidify the air effectively, but in general ventilation allows seamless management of internal microclimate of prefabricated houses, compared with an investment cost is not excessive, low power consumption and minimum maintenance. A system of this type should be installed initially but not after the finish, because action is somewhat invasive if made subsequently.
In case the reader should know the source of the problem first (assuming that it is not a "blockhouse").
This is just humidity or even from sources inside the house (hot water or steam produced from cooking food). There are barriers, or vapor barrier in exterior wall? The roof is ventilated? Carried out a regular exchange of air through the manual opening of doors and windows? That insulation is inside the wall (wood fiber, mineral wool)? The outer coat is breathable and has a thickness? The plant Heating is by radiators or floor?
may still be useful to install a dehumidification system or turning from time to time a small dehumidifier, especially in winter. Even if a fireplace (or stove) would dramatically lower the moisture content of air, producing a pleasant and economical heat throughout the house.