Cobra hip vent provides effective ventilation on hip roofs with little or no ridge area.
Hip roof and ridge vent.
Leave uncut sheathing of a 6 at gable ends.
The house has a shallow hip roof and the house is 42 wide and 26 deep.
The roof installation using hip ridge vent has survived its first winter and spring rains without reports of water infiltration.
The only problem with this lifestyle is that the quality of your indoor air can be up to 5 times worse than the outside air.
This ridge vent has 18 square inch net free area per linear foot ventilation which means i need 100 linear feet of ridge vent of which i only have 50 feet or 900 square inches of the required 1776 needed.
Inches per linear foot 19 051 mm 2 lm of net free ventilating area to help exhaust heat and moisture from the attic.
About two thirds of that time happens at home.
My existing house has a hip roof with terrible ventilation and it s stupefyingly hot in the attic.
I went up there last october when the high temp outside was 75f and measured temps in the attic no lower than 130f on the top of the insulation and over 160f at the roof line.
Yes ridge vent is a great product that is passive and creates a natural negative air pressure but each roof is in need of its own type of ventilation.
Roof has 50 linear feet of horizontal ridge that i plan on using air vent inc s shingle vent ii ridge vent.
We re going to have new plywood sheathing and shingles installed on our hip roof.
At the time of the installation of exhaust vents ensure that you are aware of whether the hip roof features ridge boards not.
We are basically starting over and can install any type of attic exhaust system we wish.
However perspective roofers have various opinions on how to properly vent a hip roof with soffit intakes.
The average person spends about 90 of their time indoors each day.
What is the optimal ventilation for a hip roof we have a hip roof in need of replacement and there is discrepancy in the ventilation suggestions.
A powered attic fan and install a ridge vent b ridge vent only and install.
Here are the three options presented.
The original 6 000 square foot roof only had 6 static mushroom vents and most of the existing soffit vents were clogged with debris.
Typically a hip roof should have 1 power fan per 1500 square feet of roof to best exhaust ventilate the heat in the attic space.
Of course this depends on the strength of the power fan.
One contractor is recommending 2 attic fans and a ridge vent one is recommending 1 attic fan and a ridge vent and one is recommending 1 attic fan and 2 box vents.
The leaving of this 6 defends the structure against wind propelled rains.
Roof ridge vents can reduce indoor air pollution levels.
There are nice large overhangs at the eaves and we will be putting in lots of venting there but the question is what to do at the top.
