Cellulose insulation is a common alternative to fiberglass in Cape Coral attics — it's made from recycled paper, treated for fire resistance, and blown in similarly. But cellulose has a critical weakness: it settles 20–30% over time, losing effective R-value as it compresses. For Lee County homeowners, this means a cellulose attic that starts at R-49 can drop to R-35 or lower within a decade. This guide compares cellulose to blown-in fiberglass and explains why we install fiberglass in every Cape Coral home.
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Both cellulose and blown-in fiberglass are installed with similar equipment and both fill attic floors completely. The key difference is longevity: cellulose settles 20–30% over its first 5–10 years as the fibers compact under their own weight, while blown-in fiberglass retains its rated R-value for 30+ years without settling. A Cape Coral attic insulated with cellulose at R-49 today may perform at R-35 in a decade.
Cellulose also absorbs moisture more readily than fiberglass, which is a concern in Florida's hurricane season and year-round humidity. Wet cellulose clumps, loses R-value, and can harbor mold — while fiberglass is naturally non-absorbent.
We install premium blown-in fiberglass in every Cape Coral attic because it delivers consistent R-value for decades without settling, doesn't absorb moisture, and won't feed mold. The R-value you pay for on installation day is the R-value your Lee County home has in year 30 — and that's the kind of long-term performance we guarantee.
Cellulose is cheaper per bag, but the long-term cost of settling — higher bills, reduced comfort, and eventual re-insulation — makes it more expensive over the life of your Cape Coral home. We'd rather install the material that performs for decades the first time.
Cellulose can be a reasonable choice for Cape Coral homeowners on a very tight budget who plan to sell within 5 years — before significant settling occurs. But for anyone planning to stay in their Lee County home longer than that, fiberglass is the better investment.
If your Cape Coral attic currently has cellulose that has settled, we can remove it and replace it with blown-in fiberglass — or top it up with fiberglass to restore R-value. Use our instant quote tool to get started.
Fiberglass is better for most Cape Coral homes. Cellulose settles 20–30% over time, losing R-value, while fiberglass retains its rated R-value for 30+ years. Fiberglass also doesn't absorb moisture, which matters in Florida's climate.
Yes. Cellulose settles 20–30% over its first 5–10 years, meaning an R-49 install can drop to R-35 or lower. Blown-in fiberglass doesn't settle, so the R-value you install is the R-value you keep for decades in your Cape Coral home.
Yes. We safely remove settled cellulose with a high-powered vacuum system and replace it with premium blown-in fiberglass to R-49+. The process takes one to two days for a typical Lee County home.
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