Once the decking and roofing are installed a truss roof looks just like a stick framed roof.
What does a roof ridge vent look like.
The soffit vents act like the air intake for the home.
Vents evenly spaced underneath the roof provide intake.
Since exhaust and intake must be equal 450 square inches of total intake is required as well.
Use the alignment guides to center the vent and for the best look align the end of the vent with the end of the house.
This gives you 450 square inches of total exhaust.
Use two inch roofing nails to pre fasten the first section through pre drilled holes.
Here s a look at the gaf cobra ridge vent attic exhaust vent installed with 4 sections https amzn to 2pdescw https amzn to 2smprxm.
The whole point to a ridge vent is that it takes air from all along the bottom of the roof line and exits it out the top kind of like a toilet.
Finally you are ready to install the ridge vents.
To calculate an example of exhaust and intake use 25 feet of roof ridge vent.
Then you might need the soffit vents too.
Trusses are set onto the walls of a house and are tied together with horizontal boards called purlins.
Even without soffit vents a ridge vent is much more effective than gable vents paulcp thinks hammer is right.
They allow the house to breathe correctly.
That means roof ridge vents are like the exhaust system.
Since each truss is a complete frame trusses do not use a common ridge board and the purlins along with the roof decking provide lateral support.
But for a simple gable styled roof structure here is what a ridge vent looks like from inside the attic of a home.
The design of a roof ridge vent works with the look of your home.
Start by inserting an end plug into the first section of the ridge vent.
Now the ridge vents are sitting perhaps 3 or 4 inches above the base of the chimney on either side and it looks like they were stuck on as an afterthought being a bare metal housing the sits on top of the peak rising above it on both sides of the chimney.
The problem with gables is they short circuit the air flow paulcp writes.