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Roundeye 01-11-2012 02:14 AM

finishing insulating attic
 
My attic has loose fill insulation between the rafters and R30 fiberglass insulation covering the entire attic floor. The attic is hot in the summer and cold in the winter. There isnt any insulation on the roof part of the attic and theres a vent on the front of the house right at the peak of the roof, I dont think there is any more venting in the roof. Do I need to add more ventilation like a ridge vent? Im guessing I need to insulate the roof part to.

TarheelTerp 01-11-2012 07:52 AM

1 Attachment(s)
Quote:

Originally Posted by Roundeye (Post 819170)
loose fill insulation between and R30 fiberglass insulation covering
hot in the summer and cold in the winter.
There isnt any insulation on the roof part of the attic
All good so far.

Im guessing I need to insulate the roof part too.
No; you don't need or want to do that
---

theres a vent on the front at the peak of the roof ...OK
I dont think there is any more venting in the roof. ...OK
Do I need to add more ventilation like a ridge vent? ...Maybe

We'll get back to the venting questions...

What do you have at the eaves?
Are there a series of openings along their length?

and then inside the attic... a free path for that air to flow?
look at the pic:

Windows on Wash 01-11-2012 08:02 AM

Your guess is wrong in this case.

Your attic, if a ventilated design, is going to be hot in the summer and cold in the winter. Most homes could use more ventilation, however, adding insulation to the roof is not proper in this case.

Gary in WA 01-11-2012 10:37 AM

If you are showing signs of mold, rust or ice dams, you could bring the venting up to bare minimum (how to figure it); http://www.airvent.com/homeowner/pro...it-specs.shtml

Gary

Roundeye 01-11-2012 01:26 PM

I don't have any opening on the eaves its solid and I don't have the pink things in the picture either.

TarheelTerp 01-11-2012 02:29 PM

Quote:

Originally Posted by Roundeye (Post 819511)
I don't have any opening on the eaves its solid and I don't have the pink things in the picture either.

This needs to be sorted out then.

The attic NEEDS a source of fresh air flowing through it.
Ideally, that is from those eaves to a ridge vent by convection.

Look for a source of fresh air.

Roundeye 01-11-2012 03:01 PM

So I need to add soffit vents,ventilation baffles, and a ridge vent?

AGWhitehouse 01-11-2012 03:55 PM

Quote:

Originally Posted by Roundeye (Post 819605)
So I need to add soffit vents,ventilation baffles, and a ridge vent?

Are you having moisture issues presently? Blackening of wood, insulation wet to touch, delamination of plywood roof sheathing, mold, etc.? Post some good pictures of your attic and many here can direct you accordingly.

If no, then you don't need to create a pain in the rear job for yourself. It's that age old saying...if it ain't broke, don't fix it.

If yes, then you'll be opening those soffits and ridge to allow for ventilation of excess moisture.

TarheelTerp 01-11-2012 04:25 PM

Quote:

Originally Posted by Roundeye (Post 819605)
So I need to add soffit vents,ventilation baffles, and a ridge vent?

Not neccesarilly...
my question is about learning where the air flow IS coming from.
If it isn't from the outside... then where from?

This:
Quote:

Originally Posted by AGWhitehouse (Post 819659)
Are you having moisture issues presently?

Blackening of wood, insulation wet to touch, delamination of plywood roof sheathing, mold, etc.? Post some good pictures of your attic and many here can direct you accordingly.


Roundeye 01-11-2012 05:39 PM

Im not having any moisture problems I just want to be able to store stuff up there without it getting ruined from extreme heat and cold, and maybe help out with heating and cooling bills.

TarheelTerp 01-11-2012 06:42 PM

Quote:

Originally Posted by Roundeye (Post 819804)
Im not having any moisture problems I just want to be able to store stuff up there without it getting ruined from extreme heat and cold, and maybe help out with heating and cooling bills.

http://www.energysavers.gov/your_hom.../mytopic=11390

AGWhitehouse 01-12-2012 09:47 AM

Quote:

Originally Posted by Roundeye (Post 819804)
I just want to be able to store stuff up there without it getting ruined from extreme heat and cold, and maybe help out with heating and cooling bills.

This is kind of a contradictory statement for most attics because to have it properly insulated, you have no place to store things. You would have to create an elevated platform above the insulation so as to not compress it. I've always found attic storage to be a horrible idea because:

1) You could potentially compromise the insulation layer unless you have an elevated platform (I've never seen one)
2) The thermal swing of the space isn't an ideal condition for a long-term storage space.
3) The debris from the roof and the insulation fibers all over your goods.
4) Creates the "horder syndrome" where you have things up there you forgot even existed.

My opinion has become that if you have so much stuff that you have to expand into the attic then a tag sale may be a good idea...

Windows on Wash 01-12-2012 09:10 PM

Quote:

Originally Posted by AGWhitehouse (Post 820396)
This is kind of a contradictory statement for most attics because to have it properly insulated, you have no place to store things. You would have to create an elevated platform above the insulation so as to not compress it. I've always found attic storage to be a horrible idea because:

1) You could potentially compromise the insulation layer unless you have an elevated platform (I've never seen one)
2) The thermal swing of the space isn't an ideal condition for a long-term storage space.
3) The debris from the roof and the insulation fibers all over your goods.
4) Creates the "horder syndrome" where you have things up there you forgot even existed.

My opinion has become that if you have so much stuff that you have to expand into the attic then a tag sale may be a good idea...

+1

Not sure if there is scientific basis for #4 but all the other points are dead on accurate.


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