Blown-in insulation is the most efficient way to add R-value to an existing attic. Loose-fill fiberglass or cellulose is blown into the attic floor to the correct depth, covering the joists and any existing insulation evenly. It's faster than batt installation, performs well in Tarrant County's climate, and is typically the right choice for attic upgrades in existing homes.
North Richland Hills is a well-established Tarrant County suburb between Fort Worth and the DFW growth corridor, built out primarily during the mid-to-late 20th century rather than in the most recent growth wave that has shaped newer Collin and Denton County cities. Much of its housing stock dates to the 1960s-80s, generally with attic insulation levels reflecting the energy codes of that era — noticeably thinner than what current recommendations call for, though typically a step up from the pre-1960s construction found in older cities like Haltom City nearby. The city sits on Blackland Prairie clay common across central Tarrant County, and shares North Texas's seasonal pattern of hot, humid summers followed by sharp winter cold fronts. North Richland Hills has seen some newer infill and redevelopment in recent years, but the core of the city's housing stock remains its mid-20th-century suburban base, making insulation upgrades a broadly relevant consideration across a large share of the city's homes rather than a narrow older pocket.
Fiberglass vs. Cellulose Blown-In
Blown-in fiberglass is white, light, and maintains its R-value even when it gets slightly damp. Blown-in cellulose (made from recycled paper) is denser, settles more over time, and has slightly better resistance to air movement through the insulation layer. Both are good options — we can advise on the better choice for your specific attic conditions and R-value goals. Neither material is universally the better choice — the right pick usually comes down to a handful of practical factors specific to your attic rather than a general rule.
- Existing insulation type — blowing cellulose on top of old fiberglass (or the reverse) is generally fine, but a contractor will check compatibility and settling behavior before recommending a mix.
- Fire and pest resistance — cellulose is treated with borate for fire and pest resistance as part of manufacturing; fiberglass is naturally non-combustible without needing chemical treatment.
- Attic ventilation — in a well-ventilated attic, both materials perform close to their rated values. In a marginally ventilated attic, fiberglass's better tolerance of incidental moisture can be an advantage.
- Density and coverage — cellulose's higher density means it can be slightly more resistant to wind-washing near soffit vents, a detail that matters more in attics with significant airflow near the eaves.
How Much to Add and Where
Your contractor measures your existing insulation depth and calculates your current R-value, then tells you exactly how much additional insulation is needed to reach the recommended level for Tarrant County. Depth markers are installed in the attic so you (or a future inspector) can verify the installed depth. The job is clean and typically completed in a few hours for a standard attic. Even coverage matters as much as total depth — a blower hose passed too quickly over an area leaves it thinner than the rest of the attic, which is why depth-marker verification at multiple points, not just near the hatch, is part of a proper job rather than an optional extra.
- Pre-installation prep — air sealing bypasses and installing baffles at soffit vents (to keep insulation from blocking attic airflow) happens before material goes in.
- Even distribution — the installer works the attic systematically rather than just filling from one access point outward, which is where uneven coverage most often comes from.
- Settling allowance — cellulose in particular is blown to a slightly greater initial depth than the target R-value requires, accounting for expected settling over the following months.
- Depth verification — markers placed at multiple points let you (or a future home inspector) confirm the installed depth without needing to measure by hand.
Have Questions?
We're happy to walk through your situation before you commit. Call us and we'll tell you honestly whether an upgrade makes financial sense for your home.
Call (469) 210-0277This content is reviewed by the Texas Insulation Pros editorial team and informed by licensed-contractor sourcing, manufacturer documentation, and established industry standards for Insulation. Read our editorial standards.