It is not only enough to keep the outer surface of the roof dry and clean, but it is equally important to ensure that the inside of the roof is dry too. Even if the roof appears to be in sound condition outwardly, it is difficult to rule out the chances of water absorption completely. Minor and almost invisible cracks that escape even the trained eyes of the inspectors at Benchmark Roofing & Restoration can be silent killers as droplets of water start penetrating the roof. While this problem affects roofs from the outside, the chances of damp inside surfaces of roofs pose similar threats to roof health.
The role of attic ventilation
Even if water does not enter the roof surface from the outside, water can still condense on the inner surfaces of the roof due to poor ventilation. The moisture in the air settles on the inside of the roof due to condensation and starts deteriorating the roofing material. To avoid the problem, the structural design of homes ensures that there is enough space left between the roof and attic for proper air circulation to prevent condensation on the inside surfaces and overheating of the roof.
Adequate ventilation of the attic and the space beneath the roof is the key to good roof health. Proper attic ventilation removes excess heat and moisture from the air that escapes through the roof vent or the ridge cap. Sometimes, placing a fan in the eaves of the attic improves ventilation. The better is the air balance more comfortable the indoor environment.
Effects of poor attic ventilation
Improper attic ventilation can pose many problems for homeowners who will have a tough time maintaining the roof. The slow damage of the roof might not be visible for some years, but when it sets in deep, it can even result in roof replacement, which is too expensive. Moreover, poor ventilation would increase the use of utilities to maintain a comfortable indoor environment and increase the energy bills.
Superheated attics – Living in ill-ventilated homes poses several problems. When the attic superheats due to the sun beating on the roof, and the inside air does not circulate properly to remove the excess heat, it heats the rooms and makes them stuffy. To maintain a comfortable indoor environment, you will have to use a cooling system that increases the energy cost.
Shortened life of Shingles – Superheated attics reduce the lifespan of asphalt shingles as a part of the superheated air between the roof and attic moves upwards and overheats the shingles. The shingles start curling and turn fragile, which would need frequent replacement and increase the maintenance cost.
Damage to wooden structure – If your home has a wooden structure, the excess heat in the attic can warp the wooden frames, and it can have a cascading effect on the walls and door frames that would also warp. Excessive heating of the walls will cause blisters that peel of the paint.
The high chances of moisture condensation in the attic during the monsoon also threaten the roof.