Determining whether to install cellulose or fiberglass within your attic or walls is one of those house renovation hurdles that will seems simple until you're actually looking at the price labels and spec bed linens. It's easy to get lost within the technical jargon, yet at the end of the day, you just need house that stays warm in the winter, cool in the summer, plus doesn't cost the fortune to keep this way.
Both materials have been around for decades, and they both perform a decent work of stopping high temperature from escaping. Nevertheless, they go about this in completely different methods. Choosing between them generally comes down to your specific house, your own budget, and exactly how much you care about points like eco-friendliness or itch-factor during installation.
What Are We Actually Placing in the Attic room?
Before we get into what type performs better, it helps to know exactly what these items are actually made of.
Cellulose is basically recycled paper—mostly old newspapers—that has been shredded into tiny pieces and treated along with chemicals like boric acid. Those chemical substances really are a big deal because they associated with paper fire-resistant and keep pests from wanting to move in. It appears like gray, comfortable clumps and will be almost always broken into spaces using a large hose.
Fiberglass, on the particular other hand, is precisely what it noises like: extremely good fibers of glass. You probably understand it as those pink or yellowish "cotton candy" rolls (batts) or simply because white, fluffy loose-fill material. It's made by spinning molten glass, and because it's glass, it doesn't naturally burn or rot.
The R-Value Truth Check
When you start evaluating cellulose or fiberglass, the very first term you'll hear is "R-value. " This is just an elegant way of measuring how well the material resists temperature flow. The increased the number, the greater it insulates.
On a per-inch basis, cellulose generally takes the guide. It generally provides an R-value of about 3. 5 in order to 3. 8 for each inch. Fiberglass loose-fill usually sits approximately 2. 2 and 2. 7 per inch. What this particular means within the actual world is that will for those who have limited room inside your attic ground or walls, a person can get even more "insulating power" away from a thinner coating of cellulose than you could with fiberglass.
However, fiberglass batts (the big rolls) are usually very consistent. You know exactly what you're getting mainly because they're manufactured in order to a specific thickness. Cellulose is a bit even more of an outrageous card because it can settle more than time. In case a service provider blows in twelve inches today, it might settle straight down to ten inches within a few years, which can slightly drop your total R-value in case you didn't account for it during the initial install.
Stopping the Air flow
One thing people often overlook is that efficiency isn't just about heat transfer; it's also about preventing drafts. This will be where cellulose often wins fans. Since it's made of small, dense particles, it's much much better at packing into nooks and crannies. Celebrate an even more solid "blanket" that makes it tougher for air to whistle throughout your walls.
Fiberglass is definitely much more porous. If you believe of cellulose like a heavy down comforter, fiberglass is more like a knit sweater. It's great at trapping heat, but in the event that there's very simple, that air can move right through the particular fibers. If your home has the lot of little air leaks, cellulose does a much better job of "plugging" those gaps, although you should actually be air-sealing with foam or caulk before you insulate anyhow.
The "Itch" Factor and Installation
If you're thinking about doing this particular yourself, the set up process might be the particular deciding factor. Let's be honest: fiberglass is a literal pain to deal with. Those tiny glass shards get in to your skin, your own eyes, and your own lungs if a person aren't careful. You have to use a suit, the mask, and mitts, and also then, you'll oftimes be scrubbing your self inside a cold shower afterward to obtain the itch away.
Cellulose isn't exactly "clean"—it's extremely dusty. When you're blowing it in to an attic, it could look like the gray fog within there. But this isn't itchy. You still require a high-quality mask since you don't want to inhale paper dust plus fire retardants, but you won't feel such as you devoted the day time rolling in cactus needles.
For DIYers, fiberglass batts are the easiest to manage since you just unroll them and staple them in. Yet for an loft floor, blowing within either material is normally the better move because it covers the joists and results in fewer gaps. You can rent a blower from many big-box hardware shops, and it's usually a two-person job—one to feed the particular machine and a single to aim the hose.
Fire Safety and Moisture
It's a common misconception that putting paper in your walls is a fire hazard. Whilst paper is obviously flammable, the boric acid treatment in cellulose makes this remarkably fire-resistant. Within some tests, dense-packed cellulose can in fact slow the spread of fire better than fiberglass since it limits the quantity of oxygen available in the wall cavity.
Fiberglass is definitely naturally non-combustible mainly because it's glass. Nevertheless, the paper backing on fiberglass batts (the vapor barrier) can catch fire.
Humidity could be the bigger enemy for both. In the event that fiberglass gets moist, it loses its insulating properties till it dries away, but it won't decay. If cellulose gets soaking wet, it can become large, clump up, plus potentially lead in order to mold or rot because it's a good organic material. In the event that you have a leaky roof, not will likely be happy, but cellulose is generally less "forgiving" associated with a major bathe.
Which 1 Costs More?
In the debate associated with cellulose or fiberglass, the cost is usually pretty close, but generally there are nuances. Fiberglass is often the cheaper material to purchase off the shelf, especially if you're purchasing batts. Because it's so common, there's plenty of competition, which usually keeps prices lower.
Cellulose can be a bit more expensive per bag, but mainly because you might require less of it to achieve your target R-value, the total price for the project often ends up being almost similar. If you're hiring a pro, you might find that labor expenses vary depending upon which material these people choose to work with. Some crews specialize in one or the other mainly because the equipment is somewhat different.
Producing the Final Call
So, which should you choose? Right now there isn't a "wrong" answer here, just a "better intended for you" answer.
If you live in an older home with plenty of weirdly designed wall cavities plus drafts, cellulose is often the way to go. Its ability to pack tightly plus dampen sound the noticeable difference in the "feel" of a house. It's furthermore the greener option since it's produced from recycled waste that would usually end up within a landfill.
If you're on a tight budget, doing the function yourself, and need something that won't resolve within the next 20 years, fiberglass is definitely a solid, dependable standard. It's been the king from the industry for the reason—it's predictable plus it works.
At the end of the day, any insulation will be better than no insulation. Whether you decide to go with cellulose or fiberglass, you're likely to notice the difference the next time the temp drops. Just make sure you put on a mask, seal off up those air leaks first, and maybe watch a several videos on just how to avoid walking through your roof while you're upward there in the attic.