DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Insulation and Radiant Barriers > Enough Insulation???




Reply
 
Thread Tools Search this Thread Display Modes
Old 12-25-2010, 05:49 PM  
jpwyatt
Junior Member
 
Join Date: Dec 2010
Location: Jacksonville, Florida
Posts: 2
Default Enough Insulation???

I live in a 2 story home that I purchased about 5 years ago in Florida that was built about 15 years ago. I was recently in the attic area and noticed it has blown in insulation that has settled to about 4 to 5 inches thick, not much higher than the 2X4 trusses. Would it be worth the investment to blow in another 10" on top of existing insulation? What should the minimum thickness be?



__________________
jpwyatt is offline  
 
Reply With Quote Quick reply to this message
Old 12-26-2010, 08:00 AM  
Perry525
Senior Member
 
Perry525's Avatar
 
Join Date: Apr 2010
Location: Lake Wales, Fl.
Posts: 112
Liked 11 Times on 7 Posts

Default

You live in a mild climate area, hot summers 90 degrees, cool winters.
I presume the amount of insulation is OK for the winter?
It's the summer you are concerned about?
The big problem is the amount of heat gained by radiation and the effect of conduction through the wood frame of your home?
Filling the attic with insulation will make a difference.
However, the radient heat landing on the roof, will enter the attic and you need to deal with this by fitting sheets of polystyrene covered with a reflector to bounce this heat back into the sky.
Dealing with the conducted heat is more expensive.
The best solution is a new SIPS roof with a covering that is either silver or white.
To keep your home as cool as possible all walls that are heated by the sun sould be covered with SIPS, where the polystyrene inner is at least five inches thick, preferably eight inches.

__________________
Perry525 is offline  
 
Reply With Quote Quick reply to this message
Old 12-26-2010, 11:34 AM  
GBR
Senior Member
 
Join Date: Mar 2009
Posts: 347
Liked 22 Times on 21 Posts
Likes Given: 9

Default

Welcome to the forum!

The f.g. you have may be R-11--13 for the thickness: Insulation Fact Sheet

Add your zip code and heating: Insulation Fact Sheet

Compute for radiant or just adding more insulation at a higher density: http://www.ornl.gov/sci/roofs+walls/...s.html#tablea1

Radiant Barrier Fact Sheet

Gary

__________________
GBR is offline  
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options

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


Similar Threads
Thread Thread Starter DIY Home Repair Forum Replies Last Post
Insulation that got wet carnuck Green Energy and Sustenance Living 3 04-20-2011 04:36 AM
When is Insulation necessary Tylon Flooring 6 01-11-2011 07:20 PM
Insulation pm80 General Home Improvement Discussion 3 02-18-2009 02:27 PM
insulation maintance Roofing and Siding 1 12-30-2008 07:58 PM
Is foam insulation or radiant barrier inas good or better than fiberglass insulation? MrsTopkat General Home Improvement Discussion 2 12-01-2005 09:11 AM

Newest Threads

LATEST SPONSOR DEALS