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,

Roof DeIcing System, Roof Heating, Gutter DeIcing. STEP Gutter DeIcing™ Low voltage flat 12" or 9" wide heating mat designed to be installed underneath the roof shingles. The heating elements are protected by a. Radiant Underfloor Heating, Heated Floors, Electric Floor. Radiant underfloor heating for heated

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