Blown-in attic insulation that brings an under-insulated attic up to code in a day

The most common problem we find in Northwest Arkansas attics

A large share of the homes in this region were built to a code that asked for far less insulation than today's recommendation. The Department of Energy puts this climate zone at roughly R-38 to R-60 in the attic. R-38 works out to about 13 inches of blown fiberglass. Plenty of homes here are sitting at R-19 or less, and some are lower than that because what was installed decades ago has settled.

Settling is the part homeowners tend to miss. Loose fill compresses over time under its own weight, and compressed insulation loses R-value because the trapped air pockets doing the actual insulating get squeezed out. Insulation that measured correctly when it went in can be underperforming badly twenty years later without ever looking obviously wrong from the attic hatch.

The other common finding is coverage rather than depth. Insulation gets pushed aside by anyone who has been up there running a cable or servicing a unit, and it rarely gets put back properly. A well-insulated attic with a bare patch over one bedroom is exactly why that bedroom is always the cold one.

Why blown-in rather than batts

Batts are manufactured in fixed widths to fit standard joist spacing. Attics are rarely standard. There are cross braces, wiring runs, ductwork, junction boxes, and framing that was cut to fit the house rather than the insulation. Every one of those is a place a batt has to be cut around, and every cut is a potential gap.

Blown-in fiberglass attic insulation is installed loose through a hose, so it flows into and around all of it. Coverage is continuous, including in the corners and along the eaves where batts are hardest to place well and where heat loss concentrates.

It is also the faster install by a wide margin, which is a real part of why it costs less. And it can usually go directly over existing insulation that is still in serviceable condition, which keeps the attic insulation cost down: you are paying to add depth rather than to remove and replace.

BIBS: blow-in blanket for walls

Attics take loose fill. Walls are a different problem, and the answer there is BIBS, the blow-in blanket system.

BIBS installs behind a fabric membrane stapled across the stud bay. The fibre is then blown in behind it under pressure, so it packs to a consistent density and fills the bay completely rather than being cut to fit it. You get roughly 15 percent better R-value than a standard batt in the same cavity, and noticeably better sound control.

It is the right call for new construction and for any wall that is already open. The full BIBS page covers where it fits, what it fixes, and how the install works.

When we recommend removal first

Not every attic should simply be topped up. We will recommend removing the existing insulation first when we find:

• Evidence of rodent activity, which contaminates insulation and is not something to bury under a fresh layer
• Water damage or any sign of an active or historical roof leak, which has to be fixed before anything goes back
• Mold, which needs remediation rather than covering
• Insulation so compacted or degraded that adding to it would not achieve the target R-value within the available depth

Insulation removal shows up in our Google reviews often enough that it is worth saying plainly: it is a normal part of this work, and we would rather do it properly than blow new material over a problem.

On a remodel, it often helps to have the crew remove the old insulation before the sheetrock comes down, which keeps the mess to a minimum.

What installation day looks like

The insulation installation starts with protecting the access route and the area below the hatch, then setting up the blower outside and running the hose in. An installer works the attic placing material to the specified depth while a second manages the machine.

We mark depth with rulers so the finished job is measurable rather than a matter of opinion. Before we leave you can see exactly what was achieved and where.

Two details separate a good install from a fast one. Baffles at the eaves keep insulation out of the soffit vents, because blocking the intake ventilation trades an insulation problem for a moisture problem. And the attic hatch itself gets addressed, since an uninsulated hatch is a hole in the middle of the work we just did.

Most attics are finished in one day. Larger or harder-to-access homes can run into a second.

What you should expect afterwards

The realistic result is a home that holds its temperature longer and an HVAC system that cycles less. The Department of Energy estimates that air sealing combined with insulation saves an average of 15 percent on heating and cooling costs. Homes that started well below code often do better than that.

What you notice first is usually comfort rather than the bill. Rooms stop swinging between too hot and too cold. The system stops running continuously on the worst days.

We will also tell you when insulation is not your problem. If your attic is already at depth and the real issue is duct leakage or an aging system, you will hear that from us during the free estimate. And if your house needs air sealing more than depth, spray foam may be the better tool, which is exactly the kind of call the in-home inspection exists to make.

Blown-in is the fix we install most often in the older housing around Rogers, Springdale, and Fayetteville, where pre-code attics are the rule rather than the exception.