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,

Lancaster Roofing Companies Roofers Lancaster PA Roofing. Combine uncompromising performance with timeless beauty with our top quality shingles. We provide shingles from GAF, North America’s largest roofing. Greenawalt Roofing Company Lancaster, York & Harrisburg, PA Greenawalt Roofing Company, serving Lancaster, Harrisburg, and York, is the roofing

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