The main factor that may weaken the stability of the roof structure is dampness. On its negative impact it is particularly exposed rafter framing, which deform under impact of water. Therefore is important roof protection against getting in  water into its internal structure.

Typically, investors during the construction of the roof attach great importance both for building materials, as well as careful execution. Unfortunately, later very often they forget about the survey, and any minor defects  commission outsource cheaper and often non-professional roofing companies. This is a big mistake,

Glossary Glossary A. ACREFOOTThe volume of water necessary to cover one acre to a depth of one foot. Equal to 43,560 cubic feet or 325,851 gallons, or 1,233 cubic meters. High Plains AtlasGlossary Kansas Geological Survey Last revision 12/01/2000 mm. HPAE Home Page Back to Directory

A very important element that must be considered when the roof is projected, is ventilation, allowing drainage of excess dampness from under the roofing.