However if the home has no soffit it is quite a different matter.
Venting roof without soffit.
Adding a ridge vent without vented soffits.
This article is part of the series roof ventilation specifications and also attic condensation cause cure.
When hot air rises up through the soffit venting it then keeps rising all the way up to the ridge vent.
Even without soffit venting it is important to provide an air gap at the soffit level to help keep the roof deck dry.
Install special roof intake venting products that work at the lower edge of the roof decking underneath the first course of shingles.
The total venting space should equal 1 150 of the floor.
Roof in the coming months and i am wondering if there is anything wrong with adding a ridge vent knowing they have no soffit vents.
Beware of adding a ridge vent without soffit vents the worst or soffit vents without a ridge vent bad or only gable end vents usually bad.
Venting solutions for roofs with no overhang or soffit.
The venting drip edge seems to be the easiest and most common way to go.
Thankfully there are some ways around this dilemma.
The main idea of the ridge vent is to act together with soffit venting to properly ventilate the attic.
They call this a venting drip edge.
One great alternative to a soffit ventilation system is to install an intake vent right at the lower edge of the roof.
This creates a natural suction phenomenon where the ridge vent is sucking air out of the soffit vents creating a natural ventilation cycle.
It describes proper roof ventilation placement amounts and other details.
The important thing to remember is the air must flow through the attic to the roof vents somewhere near the ridge of the roof.
Smart vent a special roof eaves vent product that provides a 3 4 opening about 6 above the top of the roof drip edge.
For more information on ventilation and moisture control read this article i wrote on proper attic ventilation it s my position that you should have a proper ventilation system in your attic and that you should always take the time to air seal the floor of the attic.
The spaces between the sleepers can probably be detailed so that the roof is vented at the soffit as well as at the ridge see venting a shed roof.
There current roof has lasted 28 years with just the two gable vents and about four metal roof vents along the 50 ridge.
We chose rectangular hooded roofing vents and rectangular soffit vents because they re easy to install.
With a soffit venting is not much of a challenge.
Galvanized sheet metal screws for the soffit vents utility knife blades a dust mask and one tube of roofing cement.
A passive ventilation system should have air inlets at the base of the roof usually in the soffits and outlets in the peak or gables.
In most cases all you have to do is remove about one inch off the top of the fascia the part that covers the end of.
