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

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 07-13-2013, 01:40 PM   #1
Newbie
 
Join Date: Jul 2013
Location: California
Posts: 13
Rewards Points: 10
Default

Soffit upgrade and insulation clearance


My roofer put up VentSure Heat & Moisture at the ridges and so I went around looking at the existing soffits for intake balance. Unfortunately, I don't think they did an honest NFA calculation; we have existing bird block hole soffits which if generous, are about 3" of NFA each. They installed 18" per foot NFA VentSure.

For example, in one section, about a 26 foot run, that would be around 450" NFA of VentSure and there are 37 holes (111" NFA). That's a big discrepancy. I'm sure they looked up, saw existing holes and called it done.

So two questions. First. The existing holes need to be expanded into 16x6" or 16x8" rectangle soffits to get closer to a balanced NFA. How hard is that to do when in places it can't be accessed from the inside? Cutting through the bird block and getting out the existing screening looks like a tough job (especially on tall ladders). I'm actually wondering if installing something roof-side like SmartVent might be easier.

And two. Insulation clearance. When I talked to the roofer about it the other day, when I was alarmed that a lot of the existing insulation seems to be butted up against the soffits. He said that 3/4" of clearance is all that is needed for the airflow. If there are no soffit baffles in place (which there aren't) is that reasonable?

Thanks in advance for any advice.


Last edited by eelpout; 07-13-2013 at 03:20 PM.
eelpout is offline   Reply With Quote
Old 07-14-2013, 09:23 AM   #2
Member
 
Join Date: Nov 2012
Location: Hamilton, Ontario
Posts: 206
Rewards Points: 158
Default

Soffit upgrade and insulation clearance


3/4" is okay, 1" is better. Baffles should be installed to maintain that airspace.
Its not too hard to cut plywood/wood soffits from underneath, even easier if your just expanding the hole. Just use a jigsaw or sawzall and take your time, if ladder stability is a worry for you use a set of standoffs, they make a huge difference.

PatChap is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Old home insulation upgrade during remodel? mnhockeydude Insulation 1 07-07-2013 08:26 AM
Exterior walls need upgrade in insulation xjsparky Insulation 7 06-22-2011 08:43 PM
Garage insulation - to replace or not, and related questions DaveinGA Remodeling 6 12-20-2009 10:25 AM
upgrade with Foil faced insulation? Chemist1961 Building & Construction 3 12-11-2009 05:27 PM
Did you get a resi. insulation upgrade? Yoyizit HVAC 0 06-12-2009 08:31 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.