Unless you re bulk filling rafter bays between 2 10 or 2 8 rafters with closed cell spray foam this approach will likely require you to fur out the rafters to accommodate additional insulation to achieve desired r values.
Proper hip roof venting.
Leave uncut sheathing of a 6 at gable ends.
Your roof vents may not look.
One method is to use a powered attic vent with a humidistat thermostat located close to the ridge or top of the roof.
Touch your ceiling on a warm sunny day.
Ventsure 4 foot strip heat moisture ridge vent.
If you don t see any attic vents on the roof or in the eaves you need to add some.
If the slope of your roof is greater than 6 12 you will need more ventilation to reflect the extra volume of attic space.
A frequent problem with hip roofs is that the ridge is either short or doesn t really exist.
At the time of the installation of exhaust vents ensure that you are aware of whether the hip roof features ridge boards not.
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.
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Prior to installing the ridge vent a 1 inch wide strip of roof decking is cut out along both sides of the ridgeline to allow for air movement through the vent.
Choose one of the following products to meet the recommended exhaust nfva of 528 square inches.
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.
Install additional soffit intakes keeping existing intakes clean the screens and run an attic fan that s cfm rated higher than necessary to make sure.
The leaving of this 6 defends the structure against wind propelled rains.
A ridge vent is a ventilation strip that is placed along the ridgeline of the home.
For best performance the airspace in the vent chute should be a minimum of 2 in.
It is important that air movement occurs and is not impeded by any framing members of the home.
Asphalt roofing and nrca.
Attic ventilation hip roof how to ventilation hip roof.
And in many of these cases the hip roof forms a large volumetric attic space to ventilate.