Forums Migration

Please read this thread

Recent Topics
Pennzoil
by BlueOvalFitter - 07/07/20 09:07 PM
100k 06 Fusion 2.3
by Aichiguy - 07/07/20 08:13 PM
CHINA
by buster - 07/07/20 07:52 PM
Darker varnish spot on rocker arm
by Spetz - 07/07/20 07:29 PM
AC Delco Dexron VI $18.76 a Gallon Amazon
by Matt1980 - 07/07/20 07:17 PM
ALS labs change in fuel dilution test
by LotI - 07/07/20 06:50 PM
Archery high tech
by CourierDriver - 07/07/20 06:42 PM
Odd filter issue
by fatrap314 - 07/07/20 06:33 PM
Lexus IS 350 AWD 2016 0W-20
by hotp4nts182 - 07/07/20 06:14 PM
Duh-- Didn't know there was a SIM card.
by csandste - 07/07/20 03:54 PM
Running 40 PSI vs 35
by Mr_Luke - 07/07/20 03:05 PM
Kidney Filtration-Secondary Effects???
by TravlinTech - 07/07/20 02:41 PM
When to replace mower deck?
by supton - 07/07/20 02:39 PM
API SN safe for TGDI?
by mdixon26288 - 07/07/20 02:18 PM
borgwarner 4484 t case dexron iii or gear oil?
by apollo18 - 07/07/20 02:12 PM
Hand Sanitizer warning : Methanol
by odie - 07/07/20 02:11 PM
BEST Oil Filter for 2020
by DCMotorsports - 07/07/20 12:39 PM
1997 Lancruiser/Colorado/
4Runner wishbone bolt

by Kamele0N - 07/07/20 12:33 PM
Newest Members
fatrap314, hotp4nts182, LeslieX, Mayuraj, thexeve
71876 Registered Users
Who's Online Now
112 registered members (2003f7, 92saturnsl2, 55hambone, 97trophy, alchargo, 4WD, 10 invisible), 2,059 guests, and 28 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics307,576
Posts5,313,404
Members71,876
Most Online4,538
Jan 20th, 2020
Donate to BITOG
Print Thread
Hop To
Page 1 of 2 1 2
Inexpensive insulation for attic #5213909 09/15/19 11:45 PM
Joined: Apr 2004
Posts: 3,749
daves66nova Offline OP
OP Offline
Joined: Apr 2004
Posts: 3,749
My roof"s composite shingle and it faces South. what can I put inside,on the 2X4's ,so that it blocks heat from the roof? I want to go inexpensive. Any Redneck idea is welcomed too as long as it's safe.


THIS SPACE FOR RENT, PLEASE PM ME.
Re: Inexpensive insulation for attic [Re: daves66nova] #5213941 09/16/19 12:27 AM
Joined: Jun 2012
Posts: 2,608
O
oldhp Offline
Offline
O
Joined: Jun 2012
Posts: 2,608
I was always told you shouldn't put insulation against the underside of a roof. Because it traps heat under the shingles. There are systems that address your problem. If you have room, you can take 2" styrofoam 4' X 8' sheets and nail them to the 2 X 4"s long ways. Start at the bottom and go up the roof line. Leave the very top open and have a good ridge vent.
I would not use the spray foam insulation on the underside of the roof. Too many horror stories from the smell. IDK......
Google attic styofoam insulation. There are some good videos on this. Good Luck!!!

Last edited by oldhp; 09/16/19 12:37 AM.

"None of us are getting out here alive...drink that beer...eat that pizza...drive that Hot Rod"
"When others cut you down, remember where they came from."
"I don't run...........I just quietly wait"
Re: Inexpensive insulation for attic [Re: daves66nova] #5213970 09/16/19 01:21 AM
Joined: Apr 2012
Posts: 8,815
W
Wolf359 Offline
Offline
W
Joined: Apr 2012
Posts: 8,815
It sounds like you need attic ventilation not insulation. Gables, roof vents, ridge vents, etc., all kinds of attic ventilation systems out there. Normally you would insulate the floor of the attic to stop heat from going into the attic, but if it doesn't get too cold, then it's not a big money saver.

Re: Inexpensive insulation for attic [Re: daves66nova] #5213977 09/16/19 01:32 AM
Joined: Aug 2008
Posts: 4,221
R
Reddy45 Offline
Offline
R
Joined: Aug 2008
Posts: 4,221
Airflow first, but once that is taken care of, you can install reflective barrier (looks like aluminum foil but is more durable) to block heat from radiating down into the home. HOW you install it will just depend on what you've got access to. It's generally cheaper than blown/roll insulation and a lot less dusty to handle.

Re: Inexpensive insulation for attic [Re: daves66nova] #5214005 09/16/19 05:30 AM
Joined: Mar 2015
Posts: 6,748
B
billt460 Offline
Offline
B
Joined: Mar 2015
Posts: 6,748
Originally Posted by daves66nova
My roof"s composite shingle and it faces South. what can I put inside,on the 2X4's ,so that it blocks heat from the roof? I want to go inexpensive. Any Redneck idea is welcomed too as long as it's safe.

Do you have an attached garage?

Re: Inexpensive insulation for attic [Re: daves66nova] #5214017 09/16/19 05:49 AM
Joined: Mar 2004
Posts: 24,620
D
Donald Offline
Offline
D
Joined: Mar 2004
Posts: 24,620
What 2x4 are you talking about? Ideally you want to put insulation in top of the ceiling under the roof. Blown in cellulose is the cheapest and you can rent the blower at Home Depot. DO you have proper ventilation like sofit vents and a ridge vent?

Some would install a fan on the gable end with a thermostat.


2015 Ford F-250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Inexpensive insulation for attic [Re: daves66nova] #5214056 09/16/19 07:06 AM
Joined: Apr 2018
Posts: 1,860
I
Imp4 Offline
Offline
I
Joined: Apr 2018
Posts: 1,860
You need airflow, not additional insulation.

Re: Inexpensive insulation for attic [Re: daves66nova] #5214105 09/16/19 08:10 AM
Joined: Apr 2010
Posts: 5,175
B
BMWTurboDzl Offline
Offline
B
Joined: Apr 2010
Posts: 5,175
Un-faced fiberglass insulation is the cheapest. However be forewarned that air leaks through the exterior walls/doors/windows combined with HVAC in the attic and/or leaky air ducts in the attic can depressurize the house which pulls in warm outside air.


“It took untold generations to get you where you are. A little gratitude might be in order. If you’re going to insist on bending the world to your way, you better have your reasons.”

435i
Re: Inexpensive insulation for attic [Re: daves66nova] #5214156 09/16/19 08:59 AM
Joined: Nov 2008
Posts: 16,295
S
supton Offline
Offline
S
Joined: Nov 2008
Posts: 16,295
I'd think ventilation is what you need, but you live in the south and maybe things are a bit different. But I'd increase the soffit vents, add a ridge, and insulate the attic floor. Maybe add a fan in the gables for the worst of times, get some crossflow.


2011 Toyota Camry, base, 2.5L/6MT, 206k
2010 Toyota Tundra DC, 4.6L/6AT, 160k
2003 CRV, 2.4L/4AT, 161k
1999 Toyota Camry LE, 2.2L/4AT, 225k
Re: Inexpensive insulation for attic [Re: daves66nova] #5214160 09/16/19 09:07 AM
Joined: Oct 2006
Posts: 2,137
I
irv Offline
Offline
I
Joined: Oct 2006
Posts: 2,137
Sounds like you need roof baffles and venting at the top of your roof?
https://www.google.com/search?rlz=1...By4QsAR6BAgAEAE&biw=1280&bih=578


2017 Chevy Impala 3.6 L.
2013 Ram 5.7 L Hemi Bighorn QC 4x4
2008 Chevy Malibu 2.4 L Ecotec
Pennzoil Platinum and/or Pennzoil Ultra Platinum in all 3.
Re: Inexpensive insulation for attic [Re: daves66nova] #5214240 09/16/19 10:26 AM
Joined: Jun 2019
Posts: 544
F
Fawteen Offline
Offline
F
Joined: Jun 2019
Posts: 544
Originally Posted by daves66nova
Any Redneck idea is welcomed too as long as it's safe.


A "redneck idea" is probably the worst thing to do to a roof.

Attic venting is more than just throwing up a bunch of vents or insulation. There's one right way to get it balanced and lots of wrong ways to get it unbalanced. Find a professional and get their advice so they can look at it and determine what it needs.

A roof/attic is not the place to cheap out or go redneck.

Re: Inexpensive insulation for attic [Re: daves66nova] #5214256 09/16/19 10:49 AM
Joined: Apr 2010
Posts: 5,175
B
BMWTurboDzl Offline
Offline
B
Joined: Apr 2010
Posts: 5,175
OP needs to provide more information and maybe even photos.


“It took untold generations to get you where you are. A little gratitude might be in order. If you’re going to insist on bending the world to your way, you better have your reasons.”

435i
Re: Inexpensive insulation for attic [Re: daves66nova] #5214340 09/16/19 12:29 PM
Joined: Sep 2007
Posts: 1,539
J
JMJNet Offline
Offline
J
Joined: Sep 2007
Posts: 1,539
Plant a shady tree? if there is land.

That is the nerdy NOT redneck idea I can think of.

Last edited by JMJNet; 09/16/19 12:55 PM.

  • 2017 Toyota Sienna
  • 1995 GMC Suburban 6.5L Turbo Diesel


Re: Inexpensive insulation for attic [Re: daves66nova] #5214352 09/16/19 12:47 PM
Joined: Nov 2008
Posts: 16,295
S
supton Offline
Offline
S
Joined: Nov 2008
Posts: 16,295
I don't know about the OP's area but I wouldn't want a tree next to my house. Leaves and/or needles clogging gutters, or making a mess on the roof. Branches falling off. Tree falling down into the house at the worst time. Roots getting into the septic system. Trees look nice but they can be a nuisance.


2011 Toyota Camry, base, 2.5L/6MT, 206k
2010 Toyota Tundra DC, 4.6L/6AT, 160k
2003 CRV, 2.4L/4AT, 161k
1999 Toyota Camry LE, 2.2L/4AT, 225k
Re: Inexpensive insulation for attic [Re: supton] #5214933 09/17/19 06:34 AM
Joined: Apr 2010
Posts: 5,175
B
BMWTurboDzl Offline
Offline
B
Joined: Apr 2010
Posts: 5,175
Originally Posted by supton
I don't know about the OP's area but I wouldn't want a tree next to my house. Leaves and/or needles clogging gutters, or making a mess on the roof. Branches falling off. Tree falling down into the house at the worst time. Roots getting into the septic system. Trees look nice but they can be a nuisance.


OP lives in LA (SOCAL). More like palm trees. smile


“It took untold generations to get you where you are. A little gratitude might be in order. If you’re going to insist on bending the world to your way, you better have your reasons.”

435i
Page 1 of 2 1 2
Previous Thread
Index
Next Thread

BOB IS THE OIL GUY® Powered by UBB.threads™