It is basically used to control the quality of air inside the premises by the process of dilution and distillation of pollutants inside. There are two processes for ventilation namely mechanical and natural. In mechanical ventilation, fans are used to inlet the air outside the premises and into the building. Whereas, natural ventilation uses the intentional flow of air from outside, to inside the building with the help of doors, windows and louvres. The ventilation and the mix of outside air and the inside air are beneficial for the people working inside for balance and comfort of air. It provides a healthy and livable environment feasible for working and living. The technicality behind this process is that it removes the insulation and enters the living premises. The main benefit of this ventilation is that it keeps the roof space dry and fresh.

The commonly used products are:

  • Continuous soffit vents
  • Individual soffit vents
  • Eave vents or drip edge vents

These vents should be placed in such a way that they are not covered from either inside or outside by any materials or any types of insulations. Animals, insects and precipitation are also the problems which are avoided when these ventilation systems are installed.

The types of exhaust vents used are:

  • RIDGE VENTS – These are put along the length of the ridges in the roof and are either shingle overs or non-shingle overs. These are less noticeable than the other types of exhaust vents used and are installed for prevention from precipitation.
  • STATIC VENTS – These are individual types of events that have to be installed near the roof ridges.
  • GABLE-END VENTS – These are installed in the corners of all the walls of the gable end peaks. These should be used with the soffit vents. These work and function on the direction of the wind and their level of effectiveness depend on the speed of the winds.
  • TURBINE VENTS – These types of vents totally rely on the wind for its turbine fan blades to rotate and function accordingly.
  • POWERED VENTS – These are exhaust fans which are mounted on the roofs of the premises. These are installed near the ridges of the roofs. These are also best used in combination with soffits or eave vents. These are the only ones which should not be used with the ridges of the roofs.

Now another type of ventilation is subfloor or under-floor ventilation. This type of ventilation must be used when your premises experience damp, moist, smelly and mouldy or there are fungi growing on the floors, therefore it is high time that u sub-ventilate your premises. The main purpose behind is it to replace the moist air with fresh air. This eliminates the damp swollen floor boards, reduces condensation, stops allergens and prevents mould growth. In order to install this ventilation, it should be made sure that there is no vegetation, no dead spaces, and it should have spaces which are evenly opened and construction should be done in such a way that it does not harm the ventilation process.

There are three ways of drying damp floors as follows: