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,

Dow Building Solutions UK Product Literature Dow Building Solutions United Kingdom Literature, brochures, technical certificates, technical papers. Bracknell Roofing Case studies Registered Office Lichfield Road, Branston, Burton Upon Trent, D; Registered in England No 1113375 Dow Building Solutions UK 2014 STYROFOAM™ insulation stockist network expanded.

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