While hardly anybody agrees on the best roof ventilation system everybody agrees some roof vents do hardly any good at all.
Why do roofs need ventilation.
Roof problems caused by poor ventilation roofs that do not have sufficient ventilation can have a problem with condensation in which heat warms the moist surfaces under the roof causing them to leak and stain interior ceilings.
If your attic floor has an area of 1 500 square feet for example you need 10 square feet of ventilation space unless your house has a vapor retarding liner in which case you need 5 square feet.
The majority of roofing experts agree that ridge vents are the most effective and cost effective roof vents available.
Do you really need roof ventilation.
First it allows cool fresh air to enter into the attic.
Why do some flat roofs need to be vented.
Gable vents require soffit vents that encourage air circulation.
Gable vents are not roof vents at all but serve the same function without the need of cutting into the metal roofing.
These specialty vents do not affect the.
Not only does it protect the house itself but if it is well constructed and well put up then it will protect everything within the house too.
Good quality roofing is a vital aspect to any house.
The need for roof ventilation wasn t documented until the early to mid 20th century.
As modern construction techniques continue to place more emphasis on energy conservation minimising the heat loss from buildings insulation thicknesses have increased and air tightness is constantly improving.
Roofs generally have a number of venting devices including ridge vents soffit vents fans and mechanical types of airflow assistance.
Especially during the winter you might wonder why your roof needs vents.
That s when organizations like the american society of heating refrigerating air conditioning engineers formerly ashve and forest products laboratory recognized that building condensation problems could be caused by poor roof ventilation.
Two gable vents may not be sufficient.
Why is there a need for roof ventilation.
A balanced attic ventilation system that consists of intake at the eaves soffits or fascias of the roof and exhaust at or near your roof ridge serves two important functions.
The area of soffit and roof vents is typically measured in square inches.
Rafter vents or insulation baffles install in any rafter space to create narrow gaps that direct fresh air from the soffit vents to the peak of the roof.
Hot roofs need to be ventilated and cold roofs don t but why.
Take a look at the reasons behind roof ventilation the different types and if you need it.
Take for example ridge vents.
Second it allows hot moist air to escape.
After all aren t those vents letting your warm conditioned air escape.
If the roof has numerous gables gable venting may suffice.
