Ventilation waterproof insulation

Waterproofing membranes can be divided into three main families:

• breathable

• steam brakes

• vapor barriers.
  

All membranes guarantee waterproofing, are very light and are easy to install.

What are the differences?

the breathable membranes allow the water vapor to escape to the outside avoiding the formation of condensation;

- the steam brake allows a minimum release of water vapor;
- the vapor barrier does not allow the passage of water vapor to the overlying layers.

The choice of a membrane must be made in relation to the type of load-bearing structure (wooden or brick roof), the slope of the pitch and the functional performance to be obtained.

Yes, the law 311/06 and subsequent amendments and additions makes it mandatory. However, two other factors must be considered: since the hot air produced during the winter period tends to escape from the roof, in the absence of insulation, up to 45% of the heat of the house is lost; to incentivize the energy requalification of buildings, the government has provided for a tax deduction equal to 55% of the expenses incurred for the interventions carried out.

These are particular types of waterproofing membranes capable of reflecting 55% of the heat transmitted by solar radiation and of breaking down up to 98% of electrosmog. By placing a reflective membrane under the tiled roofing, the living comfort is significantly increased.

Waterproofing represents an additional protection necessary to have the guarantee that, following accidental breakage of tiles and bent tiles (due for example to foot traffic for maintenance), the displacement of some roofing elements (strong gusts of wind), sudden and violent atmospheric events , water infiltrations that could cause aesthetic and functional damage do not occur.
Waterproofing membranes are always recommended whatever the slope of the roof and are mandatory for pitch slopes of less than 30%.

They also avoid the infiltration of powdery snow and dust.

Correct insulation of the roof, during the winter period, limits the loss of heat from the heated rooms, also drastically reducing fuel consumption. In summer, it limits the entry of heat by saving the electricity of air conditioners and air conditioners.

Absolutely. The ventilated roof guarantees a longer duration of the material and has a decisive influence on the thermal comfort inside the buildings. The ventilated roof reduces heat in the summer, allows the disposal of water vapor during the winter, dries any infiltration of water or condensation, prevents the formation of condensation in the under-tile when the roof is covered with snow. Having a ventilated roof means having a healthier roof, less prone to breakage and therefore to infiltration. BMI always recommends paying particular attention to ventilation by laying the mantle correctly, avoiding the use of concrete as a fixative both when laying tiles and bent tiles and for the ridge and eaves areas.