Guests - If You want access to member only forums on HSO. You will gain access only when you sign-in or Sign-Up on HotSpotOutdoors.

It's easy - LOOK UPPER right menu.

Sign in to follow this  
Followers 0
DRH1175

Celulose vs Blown in fiberglass

8 posts in this topic

I need to insulate my garage attic. Which one do I go with. Celulose is $5.80 a bag the Fiberglass is $38 a bag?

Share this post


Link to post
Share on other sites

Cellulose will settle a lot and fiberglass will settle very little. As insulation settles, you lose R value. At the current cost of energy, a little extra for the fiberglass now might mean bigger savings for years to come.

Share this post


Link to post
Share on other sites

The cellulose also weights more.

I put that in the garage in our first house and you could see that the sheet rock was bowing from the weight. Especially if it gets wet from snow blowing in or condensate it will hold the moisture.

I put 15" of fiberglass up in my Main garage and also in the shop as well on the new house. Much better R value and easier to install as well.

Share this post


Link to post
Share on other sites

Along with what is mentioned above the $5 -vs- the $38 is not for like coverage. Fiberglass is more expensive but not that much. I can't remember what the cellulose bag covers -vs- the fiberglass but it is not the same. The biggest thing for me is the clean up, cellulose blows dust EVERYWHERE including where you are spraying it and where you are loading it. The fiberglass is much much easier to clean up.

Share this post


Link to post
Share on other sites

i work with a guy that has been blowing insulation in houses for the a quite a few years now and he told me a while back he would never put fiberglass in an attic. heres what he told me.

you are right that cellulose packs more. but insulation works with on how air moves, or doesnt move through it. the less the air moves through it the better the insulation value is. one thing is you will probably need to go twice as deep with the fiberglass as opposed to the cellulose. we put 14 to inches of insulation for a i think an R 50. from what i know about chopped fiberglass you would need more.

ever thought about just rolling out some fiberglass in the rolls between the trusses, then rolling out more at 90 degrees to the bottom layer.

Share this post


Link to post
Share on other sites

If you don't have the ceiling rocked then use the fiberglass bats. Two layers run perpendicular.

I might consider blown glass in a wall cavity but because of the air movement I'd go with cellulose in the attic. Having said that I've blown cellulose in more attics and walls then I care to remember. Protect your lungs and a good mask respirator with spare cartridges. The mess isn't bad unless you plug the hose. Keep the feed down, that'll ensure you won't plug and it'll give more loft to the cellulose. Rolling bats would be tough if you have a 4/12 trusses, although crawling in to put in chutes isn't fun either.

Share this post


Link to post
Share on other sites

I already put upt the chutes before I sheetrocked. Celulose is suppose to be way better when it comes to fires plus it is a recycled product. That is why I was leaning. I have 5/8" rock so I would think that should hold it up just fine. I think I need 15" of cellulose vs 20" of the fiberglass. The price difference was 490 vs 820 quite a jump. I guess it is a ford chevy thing. Thanks for the input.

Share this post


Link to post
Share on other sites

I already put upt the chutes before I sheetrocked.

Make sure you put in the chutes and the windwash barrier. Chutes do not meet current code by themselves any longer.

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  
Followers 0



  • Posts

    • Thanks for the heads up man I was looking at Garmins but I feel like the only ones I saw with SI were way out of my price range ha
    • I need to make a beer run the fridge is getting low up in here.   #rentfree
    • What does everyone use? decoy string mono braid thanks.
    • LOL!  The truth of the matter is, CWD is widespread across the country and I believe in only one state, somewhere out west, has it caused population level decreases.  The DNR has no choice but to try their darnedest to eliminate it.  If they don't and it becomes widespread, they will be ridiculed to no end.  If they try to fight it, they will still be ridiculed when they fail to eliminate it, but at least they tried.  IMVHO, it is here, just like the invasive species continuing to spread in our lakes.  There is no way to eliminate it.  But as I stated, it won't significantly impact deer numbers in the state.  The disease will kill far fewer deer than the efforts to get rid of it will.  It is mainly the health issues to worry about.  But I've been wrong once or twice before.
    • Was Hillarys plan to help rural America much like Obama's and Rick Nolan's? Wait for an industry to collapse then push for tarriffs a year after the fact and claim victory?
    • Kinda like how Trump is the grand wizard of the klan because he hasn't  denounced every supporter he's had well enough.
    • Regardless of where you put that fan you'll still need another fan of some sort to circulate the air around the house. The heater one only get the air out and off the heat exchange. Put one or two more in the upper corners blowing the air back down. Hugger style ceiling fans if you have room are the best. The blades need at bare minimum 4 inches and most experts say 8 inches of clearance to the ceiling. I'm at about 4 1/2 and it works fine. 
    • Keep in mind its technically winter and by foaming it in "his" shop he is doing a service to you and you are paying for it.  Your house will need to be at least 50 degrees to foam it.  I just had my 8x16 floor sprayed in my shop this past sat and it was $220.  The guys that did mine are done for the season, getting too cold to travel and keep the chemicals from freezing. 
    • An easier thing first is to get the thermostat bulb out of the cabinet of the heater, it will react faster to the temp you feel, not the retained heat in the unit.
  • Our Sponsors