The After-roof Roof Project - Roofing/Siding - DIY Home Improvement | DIYChatroom


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Roofing/Siding

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 12-01-2010, 01:41 AM   #1
Member
 
Join Date: Aug 2010
Location: metro
Posts: 1,310
Rewards Points: 852
Smile

The After-roof roof project


HI all

first just want to thank everyone for their comments and input in my other thread. i know i dragged you all through a whole lot of pictures and stupid questions and what not.

anwyays not getting any replies in the other section-so now that the new roof is in place, i am going to do spray foam insulation for the attic. what do you guys think about this?

thanks for all the input

Advertisement

federer is offline   Reply With Quote
Old 12-01-2010, 01:44 AM   #2
Member
 
Join Date: Aug 2010
Location: metro
Posts: 1,310
Rewards Points: 852
Default

The After-roof roof project



Advertisement

federer is offline   Reply With Quote
Old 12-01-2010, 06:35 AM   #3
Shut in w/o Home
 
seeyou's Avatar
 
Join Date: Dec 2008
Location: Lexington, KY
Posts: 696
Rewards Points: 500
Default

The After-roof roof project


Quote:
Originally Posted by federer View Post
i am going to do spray foam insulation for the attic. what do you guys think about this?

thanks for all the input
Open cell or closed cell?
seeyou is offline   Reply With Quote
Old 12-01-2010, 11:02 AM   #4
Doing This Way Too Long
 
Join Date: Jun 2008
Location: North Idaho
Posts: 1,160
Rewards Points: 524
Default

The After-roof roof project


Federer! As annoying as you've been the last few months and that's the only picture you gonna give us of your final handiwork? Geez!!!!
OldNBroken is online now   Reply With Quote
The Following 2 Users Say Thank You to OldNBroken For This Useful Post:
MJW (12-01-2010), seeyou (12-01-2010)
Old 12-01-2010, 10:08 PM   #5
Member
 
Join Date: Aug 2010
Location: metro
Posts: 1,310
Rewards Points: 852
Default

The After-roof roof project


Quote:
Originally Posted by seeyou View Post
Open cell or closed cell?
open cell. sorry didnt clarify before
federer is offline   Reply With Quote
Old 12-01-2010, 10:09 PM   #6
Member
 
Join Date: Aug 2010
Location: metro
Posts: 1,310
Rewards Points: 852
Default

The After-roof roof project


Quote:
Originally Posted by OldNBroken View Post
Federer! As annoying as you've been the last few months and that's the only picture you gonna give us of your final handiwork? Geez!!!!
lol you are kidding right..i posted like 13 pics in my other thread...i know it was pretty annoying...i thought most people on here wanted pics though...
federer is offline   Reply With Quote
Old 12-01-2010, 10:26 PM   #7
Doing This Way Too Long
 
Join Date: Jun 2008
Location: North Idaho
Posts: 1,160
Rewards Points: 524
Default

The After-roof roof project


My bad, guess I better head to the other thread. I missed that
OldNBroken is online now   Reply With Quote
Old 12-02-2010, 05:33 AM   #8
Member
 
Join Date: Dec 2007
Posts: 63
Rewards Points: 75
Default

The After-roof roof project


why do you want to sprayfoam the rafter bays?
is your new roof vented?

sprayfoam is considered "the best", I suppose,
but its not all roses and is best used in spot applications or
difficult situations. Sealing rim joists is one example.
rodeo is offline   Reply With Quote
Old 12-03-2010, 12:04 AM   #9
Member
 
Join Date: Aug 2010
Location: metro
Posts: 1,310
Rewards Points: 852
Default

The After-roof roof project


Quote:
Originally Posted by rodeo View Post
why do you want to sprayfoam the rafter bays?
is your new roof vented?

sprayfoam is considered "the best", I suppose,
but its not all roses and is best used in spot applications or
difficult situations. Sealing rim joists is one example.
not the rafters-the underneath of decking. i just used that pic as a reference. the reason is because i have a flat roof, so there is not a lot of space between decking and attic floor. so i cant use fiberglass because i can only get like R12 or something.

the roof is not vented-which is also why we are going with foam-otherwise we would need intake and ridge vents,etc.

i do need to seal rim joists too!
federer is offline   Reply With Quote
Old 12-03-2010, 12:17 AM   #10
Member
 
Join Date: Dec 2007
Posts: 63
Rewards Points: 75
Default

The After-roof roof project


Spraying the underside of the decking is the same thing as spraying the rafter bays. They mean the same thing.

Did you lay any rigid foamboard above the deck when the reroof was done?
rodeo is offline   Reply With Quote
Old 12-03-2010, 06:47 AM   #11
Shut in w/o Home
 
seeyou's Avatar
 
Join Date: Dec 2008
Location: Lexington, KY
Posts: 696
Rewards Points: 500
Default

The After-roof roof project


Quote:
Originally Posted by federer View Post
not the rafters-the underneath of decking. i just used that pic as a reference. the reason is because i have a flat roof, so there is not a lot of space between decking and attic floor. so i cant use fiberglass because i can only get like R12 or something.

the roof is not vented-which is also why we are going with foam-otherwise we would need intake and ridge vents,etc.

i do need to seal rim joists too!
Don't use open cell if there is no venting. If I understand correctly, moisture can permeate open cell, but not closed cell.

Last edited by seeyou; 12-03-2010 at 09:45 AM.
seeyou is offline   Reply With Quote
Old 12-03-2010, 09:42 AM   #12
Member
 
Join Date: Aug 2010
Location: metro
Posts: 1,310
Rewards Points: 852
Default

The After-roof roof project


Quote:
Originally Posted by seeyou View Post
Don't use open cell if there i no venting. If I understand correctly, moisture can permeate open cell, but not closed cell.
oh? isnt that why though? just in case there was a leak in the roof the water could come through-otherwise i would never find out until its too late (all teh wood would already rot away)
federer is offline   Reply With Quote
Old 12-03-2010, 09:45 AM   #13
Shut in w/o Home
 
seeyou's Avatar
 
Join Date: Dec 2008
Location: Lexington, KY
Posts: 696
Rewards Points: 500
Default

The After-roof roof project


Quote:
Originally Posted by federer View Post
oh? isnt that why though? just in case there was a leak in the roof the water could come through-otherwise i would never find out until its too late (all teh wood would already rot away)
It'll come through where the insulation meets wood or other material. But, if you trap condensation against the wood, it might not show up until serious damage has been done.
seeyou is offline   Reply With Quote
Old 12-03-2010, 10:12 AM   #14
Member
 
Join Date: Aug 2010
Location: metro
Posts: 1,310
Rewards Points: 852
Default

The After-roof roof project


so closed cell will prevent condesnsation?
federer is offline   Reply With Quote
Old 12-03-2010, 12:06 PM   #15
Shut in w/o Home
 
seeyou's Avatar
 
Join Date: Dec 2008
Location: Lexington, KY
Posts: 696
Rewards Points: 500
Default

The After-roof roof project


Quote:
Originally Posted by federer View Post
so closed cell will prevent condesnsation?
Not exactly prevent. But it keeps the water vapor inside from reaching the cool underside of the sheathing where condensation would occur. Open cell lets the vapor through.

Water coming the other way through the roof will find it's way in past either type foam.

Advertisement

seeyou is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Need opinion on this roof profenx Roofing/Siding 14 10-12-2010 01:56 AM
Strange Winter Roof Leak Dragon Roofing/Siding 16 10-09-2009 07:06 PM
The moving Ice Dams after using a roof rake ?? Canufixit Roofing/Siding 9 02-05-2009 08:33 PM
Rubber Roof and Roof Deck vianak Roofing/Siding 2 10-09-2008 06:37 PM
Flat roof - Rolled? - leaks Advice? JJ2001 Roofing/Siding 4 11-19-2006 07:17 AM




Top of Page | View New Posts