20 jun 2012 18 57.
Is is necessary to vent a porch roof.
If your porch has developed ceiling stains or problems shedding snow and ice in the winter try providing additional venting for the roof system.
The intent of roof venting varies depending on climate but it is the same if you re venting the entire attic or if you re venting only the roof deck.
Preventing ice dams when a roof is over a heated space.
Island mount vent hoods are appended to the roof and are designed to be used in spaces where there is not a wall to attach the hood.
Knee vents that fit along the area where the roof joins the house can also provide good ventilation for porches according to the roofing.
The joint where the top of the porch roof meets the wall needs to be flashed well and most of the vent details for that look to me like they might leak water under some conditions of rain and wind.
Sustainusfarm member posted.
Soffit vents have much less risk of water entry.
Louvered vents provide good air flow for roof areas.
Proper roof ventilation is an important aspect of home construction.
Roof vents help make a home more energy efficient and allow humidity and hot air to escape the.
I really don t think it is necessary to vent a porch roof at all.
People have strong and differing opinions on whether roof venting affects shingle life.
Attached directly to the wall this style of hood extends out over your grill.
I say skip it.
However if your grilling setup is enclosed or even semi enclosed such as under a roof overhang you re going to want to vent it to avoid smoke build up.
If the porch roof does not have soffits you can add something called a drip edge vent and what a drip edge vent does is it in essence creates about a two inch overhang and creates sort of a mini soffit where you can get some airflow up underneath the plywood sheathing and then that air would run between the insulation and the underside of the sheathing but you need to make sure it has.
And keeping cooling costs down hot climates.
Especially an open porch.
Wall mount vent hoods.
Neither of those apply to a porch roof.
In a cold climate the primary purpose of ventilation is to maintain a cold roof temperature to avoid ice dams created by melting snow and to vent any moisture that moves from the conditioned.
Also known as wall mount chimneys this is the most popular vent hood option.
Porch roof ventilation options.
If your outdoor kitchen is in an uncovered area you most likely won t need a vent hood.
