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,

How picky are you and should I be concerned? Forest. So I just got back from the dealer where I have an XLR DS on order. I see that my toy hauler has apparently just come in and is sitting on the lot. Bronx , NY

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