Ask Experts Questions for FREE Help !
Ask
    azhuettl's Avatar
    azhuettl Posts: 35, Reputation: 1
    Junior Member
    		  
    #1

    Jul 29, 2012, 01:20 PM
    Do I need to vent a flat roof?
    Building new guest house in Arizona.
    Flat roof 1:12 pitch, 24' span
    Spray Foam insulation top (1")
    Plan on bat insulation above ceiling.?.
    So. Do I need to vent this roof?
    creahands's Avatar
    creahands Posts: 2,854, Reputation: 195
    Ultra Member
    		  
    #2

    Jul 29, 2012, 03:30 PM
    Yes

    Chuck
    azhuettl's Avatar
    azhuettl Posts: 35, Reputation: 1
    Junior Member
    		  
    #3

    Jul 30, 2012, 04:40 PM
    Quote Originally Posted by creahands View Post
    yes

    Chuck

    Hi.
    So how many vents and where?
    Roof is already sprayed, so can I vent from the side?
    Thanks
    Tom
    creahands's Avatar
    creahands Posts: 2,854, Reputation: 195
    Ultra Member
    		  
    #4

    Jul 30, 2012, 07:00 PM
    If u have soffit at front and back, vent between each rafter.

    Chuck
    azhuettl's Avatar
    azhuettl Posts: 35, Reputation: 1
    Junior Member
    		  
    #5

    Jul 30, 2012, 10:14 PM
    Quote Originally Posted by creahands View Post
    If u have soffit at front and back, vent between each rafter.

    Chuck
    Hi
    No sofit's. Adobe style house. Will try to attach picture.
    Old picture. Roof is foamed and walls have styro and lath already.
    Walls go straight up to top.
    Tom
    Attached Images
     
    creahands's Avatar
    creahands Posts: 2,854, Reputation: 195
    Ultra Member
    		  
    #6

    Jul 31, 2012, 05:48 AM
    Install venting on the roof side of the parapet wall and drill holes in plate. Use 2'' round 5 or 6 vents. This will keep wall face neat looking. In rear u may have to mount vent in wall.

    Chuck
    azhuettl's Avatar
    azhuettl Posts: 35, Reputation: 1
    Junior Member
    		  
    #7

    Aug 7, 2012, 08:41 PM
    Quote Originally Posted by creahands View Post
    Install venting on the roof side of the parapet wall and drill holes in plate. Use 2'' round 5 or 6 vents. This will keep wall face neat looking. In rear u may have to mount vent in wall.

    Chuck
    Hi
    We finally decided to foam the inside of roof making it a sealed space. I like the ductwork not being in the heat while they carry my AC air.
    Thanks for your input on this.
    Tom
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Can a vent be installed on a flat rubber roof in PA? [ 7 Answers ]

I bought a row home 1 1/2 years ago, and I have central air along with an oil furnace. The rubber roof was installed approximately a year before I bought the house. I'm finding that on the second floor, it is extremely hot and stuffy in the summer. More so then what I have experienced in the past...

Flashing Roof Vent on Flat Roof [ 14 Answers ]

I am getting ready to install some ventilation in my flat roof. I've decided to go with this system: Flat Roof Top Attic Ventilation. It looks perfect for my application. I've done some research on how to install the fan, including on a couple other forums, but have a couple of unanswered...

I am building a truss roof over a flat roof.the size is 9'wx9'd.where do I begin this [ 2 Answers ]

I am building a gable roof over a flat roof at our church.It is 9'wx9'l.How do I determine the height of the center rafter?

Condensation Build-up under Vent where Furnace vent exits Roof Line [ 4 Answers ]

I had a small water stain appear on my roof this winter and went up in the attic to find frozen condensation below the vent where both my water heater and my furnce exit the roof top. Do you have any suggestions on what could be causing this and how to rectify the situation.

Attach gable roof to flat roof [ 1 Answers ]

We are building a three season attached screenroom. We are uncertain how to attach the gable roof to the present roof (gabled in the opposite direction, so the attachment is on the flat side). We have spent hours trying to locate do it yourself instructions and can only find do it yourself kits...

View more questions Search