By removing the old insulation you ll expose the ceiling.
Attic ventilation summer.
Intake vents located at the lowest part of the roof under the eaves allow cool.
Here are the signs to look for.
Water stained or blackened wood.
Just like properly sizing your furnace and air conditioning unit you want precisely the right amount of attic ventilation for your home.
Effective attic ventilation systems reduce damaging heat and moisture in your attic promote energy efficiency by helping to reduce the load on your air conditioner in the summer and also reduce the risk of ice dam formation on your roof.
If you ve got a vented attic that gets hot in the summer your first option is leave the attic vented and make sure the ceiling is air sealed and insulated as well as possible.
Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.
Good ventilation allows the heat and moisture to escape.
Attic ventilation in the summer one of the very first things they teach you in science class is that heat rises.
This heat can lead to uncomfortable living spaces high cooling costs damage to your roof and premature aging of your air conditioning system.
A sign of mildew or rot.
The most common mistake homeowners make when installing insulation is to block the flow of air at the eaves.
But in homes without appropriate insulation and ventilation in the attic heat migrates.
If you ve got an older home and it needs more insulation you ve got the perfect opportunity.
In the summer good attic ventilation reduces heat buildup.
Attics can reach temperatures of 150 to 160 degrees f during a summer day although outside air temperatures are only 95 to 97 degrees f.
For example in the summer or in places where it s summer all the time like las vegas the sun beats down on the roof heating up the attic.
Insufficient ventilation can lead to moisture problems during the winter and decreased energy efficiency during the summer but too much ventilation can be just as bad if not worse.
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.
Frost on the underside of the roof or rafters.
In the winter warm moist air seeps into the attic from the living space below.
Here are some of the myths and the facts you need to know about attic ventilation.
Attic ventilation is summer attic ventilation cuts cooling costs an unventilated or under ventilated attic can lead to heat buildup in your attic during hot summer months.
Warm moist air trapped in the attic condenses and freezes on the wood.
More attic ventilation is good.
The maximum ventilation rate is required to remove heat during the summer cooling months.
You can also spot this in the summer.
