A) Architectural aspect. Objects must possess significant architectural and artistic worth; they must reflect obvious national peculiarities of native wooden sacred architecture.
B) Constructive aspect. Objects must represent constructive approaches which are typical for regional traditions during definite period.
C) Technological aspect. Objects must represent distinctive methods of timber treatment.
D) Scientific-research and restoration aspects. Objects must be in need of additional or extra restoration investigations for their undamaged integrity as memorials of national wooden architecture, for systematizing and informative propagation.

“Conservation Conditions for Wooden Monuments in Ukraine”
(Kharkov State university of Civil-Engineering and Architecture)

The folk wooden architecture of Ukraine was developed in the context of Eastern Slavic traditions. European architecture has also made its great impact on the Ukrainian culture. IX-XII century is connected with the time of architectural forms and constructions general unity development. In XVI-XVIII century the national specific features of Ukrainian wooden architecture was intensively developed. Chronologically it coincides with the Baroque period. That is why its features were manifested in Ukrainian distinguish of style. XVIII century became the Golden Age for the Ukrainian culture. Unfortunately in XX century for a long time the sacred wooden monuments conservation was almost neglected because of official policy caused by materialistic ideology of the communist state. More than that the substantial part of heritage were almost ruined. Anyway in our time about 200 outstanding monuments of wooden architecture are known. More than 600 monuments are considered to be the national heritage.

Today the priorities are gradually changing. The essence of the present time is the search for self-identification that expresses itself in searching for native historical and cultural roots. As a result intensive works were begun in the field of wooden monuments conservation (preservation). There exist the following methods of restoration in Ukraine:

1. Conservation (preservation) of the object in its actual form by means of modern methods of reconstruction with maximum conservation of original parts;

2. Fragment restoration: the revival of the lost fragments of the object and removal of the foreign parts on the bases of scientific methods. These methods include chemical conservation of the wooden parts without construction demounting.

3. Holistic restoration: the reconstruction of the object in its original form on the bases of the saved samples. This method includes scientific methods of restoration, chemical (polymer) technologies.

The approach to conservation is efficiently realized as “Scansen” (Perejaslav-Kmelnickiy (1964), Lvov (1966), Zakorpatskiy region (1967), Kiev (1969) and conversation on site.

The most dangerous factor for the Ukrainian wooden churches is the humidification of the construction. At the temperature of 18-36 degrees the fungus is the destroying factor. The condensed dampness produces advantageous conditions for the insects that destroy wood. The most frequently antiseptics used for conservation in Ukraine is: sodium fluoride, flint sodium fluoride, sodium dichromate, borax, boric acid, sodium pentachlorophenolate etc. The most efficient is the mixture of sodium pentachlorophenolate, borax and boric acid. This solution helps to protect wood against biological destroyers as well as against fire saving its natural beauty. The most efficient is the method of reassembly of the construction accompanied by its chemical processing.