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.
Hip roof attic insulation.
This is a styrofoam shoot that you staple to the underside of the roof deck stopping the insulation from compressing against the underside of the roof and creating a 1 1 2 airspace for 4 to 8 long.
With the hip roof design the roof joists run close to the floor joists for about 30 to the eves.
Additionally insulation serves as a way to enhance sound proofing on the uppermost envelop of your house.
I am installing my insulation baffles for the attic.
Most codes require a specified minimum amount of headroom and it s tough to meet this requirement when insulating a finished attic especially since most codes require insulation equal to r 38 or more.
The 2nd story ceiling insulation is a blown in cellulose and the walls 2nd story down is a blown foam.
The next two on each side have a little more room as you can see which i just cut the insulation baffle at an angle to fit in.
I would recommend that you install them the full length from the lowest part of the attic to where there is an adequate air space existing.
Insulating in and around your roof attic space also prevents long term damage from moisture build up or ice damming which results from the warm air trying to escape through the apex of the roof but instead heating up the snow.
Am building a 10 x10 closet in attic under a hip ridge.
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.
My roof is a hip style and the corners have a main bridge truss that the smaller guys attach to to form the corner.
However if you have a cathedral style garage roof you will need a scaffolding to get into the upper areas of the roof.
The floor joists in the attic appear to be 2x10 and filled with the cellulose.
If you have a flat garage roof and an attic above you can install the garage insulation from below using a standard ladder.
In either case you will need to follow the general steps below to insulate your garage roof.
Data design suggestions for hot roof designs or for providing roof and ceiling ventilation and we describe roof roof insulation or venting system inspection methods and clues to detect roof venting deficiencies insulation defects and attic.
If insulation is stuffed between the rafters i understand the risks you describe with the sheeting damage because of possibility of trapped moistures as the rafters are attached to the hip ridge that won t allow venting.
I have run into a problem.
To meet all three goals insulating your finished attic ventilating the roof and maximizing headroom use a combination of dense batt insulation rigid foam sheeting and air chutes.
8 pitch roof 2 6 rafters 1 2 plywood sheeting.
The first two immediate rafter bays in the corner have very little room.
I have a 1950s ranch with a hip roof that i am adding roll insulation over the blown insulation.
I know i have to keep an air space up from the eves but how.
Solutions for roofs or ceilings that are hard to vent.
The attic is uninsulated.
No outlet venting found.
