Common guidelines and recommendations for changing legislation

When performing renovation, reconstruction or maintenance work, it is necessary to pay attention to the coordination between the protection criteria as this is the only way to transfer the unique authentic expression of heritage to future generations. We must preserve the original architectural heritage in its unique form to the greatest extent possible, which means the preservation or professional objective interpretation based on the principles of architectural heritage conservation.

The replacement of the original material in each renovation is a difficult task. The replacement of a stone roof with red tiles changes the appearance of the building and affects the building's height. Red tiles require an inclination of only 30°. Such an inclination, coupled with the retention of the drip edge, lowers the height of the ridge, which is noticeable on some side façades where the line of the previous stone roof has been retained.

In his survey of the Karst, Božidar Premrl uses the term grey and white limestone, which are not used in architectural and geological terminology. The RoofOfRock project has achieved a qualitative milestone in this respect as the experts from various fields have revamped the terminology, suggesting the following:

• laminated dark limestones (grey) are bedded in thin horizontal layers; e.g.: Komen limestone that emanates a distinct sharp smell when slabs are being extracted. Laminated dark limestones are less durable, they flake in layers and become weathered more quickly.
• white limestone occurs at tectonic fractures on the Karst, the plates are vertical to the sediment and of various thicknesses and fractures. Marine animal fossils are common in these plates, e.g.: in the Lipica quarry.