Control of ice dams moisture accumulation and heat gain can be successfully addressed by both vented and unvented attic or roof design.
Does an attic need to be vented.
In this post you ll learn whether you need to vent your garage attic or not based on your situation.
In the summer natural air flow in a well vented attic moves super heated air out of the attic protecting roof shingles and removing moisture.
Many contractors recommend you ventilate the attic while others deem it unnecessary.
Best ventilation is open soffit venting to a open vented ridge vent.
Roof ridge vents are attractive and effective.
In many cases for existing homes this is the easier way to go.
More than 50 of the attic fans i see do not work and have current still live to the motor.
In order to facilitate this.
So much information has been devoted to the subject of roof venting that it s easy to become confused and to lose focus.
About attic ventilation.
Once your roof is adequately vented to allow the hot air to escape and the cool air to enter the attic space your home will be more comfortable year round.
A vented attic where insulation is placed on an air sealed attic floor is one of the most underappreciated building assemblies that we have in the history of building science.
So i ll start by saying something that might sound controversial but really isn t.
All you need to know about attic ventilation.
The other option of course is a vented attic which requires an equal balance of intake and exhaust vents.
However the designs need to be climate sensitive.
Instead the roofers do not install the regular metal roofing over the top of the ridge but leave a gap that runs the ridge s entire length.
The choice of the venting approach is up to the designer.
According to the.
I need a roof and would like standing seam aluminum since i live on the water.
Your roofing contractor can provide the exact number of roof vents needed for your particular roof but the rule of thumb is one vent for every 300 square.
Vented attic roof designs have the advantage of a long proven historical track record.
One of the leading causes for fires.
How many roof vents do you need.
To completely cover your attic floor with insulation out to the eaves you need to install rafter vents also called insulation baffles.
Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic.
Attic ventilation has been a controversial topic among building contractors.
Complete coverage of the attic.
And it gets even dicier when it relates to the garage.
Attic ventilation works to protect the indoor structure of buildings in many ways such as maintaining a cold roof temperature to control ice dams to vent moisture that moves from the conditioned space to the attic to vent and expel solar heated hot air from the attic to lessen building cooling etc.
I had a homeowner recently send me this question about how to vent a metal roof.
