Attic Insulation in Ringgold, GA

Foametix is a veteran-owned spray foam insulation company in Chattanooga, 17+ years at this work. Ringgold is seventeen miles down I-75 from our shop, so Catoosa County is not a market we visit. It is a place we work most weeks of the year.

This page is about attics. Not walls. Not crawl spaces. Attics.

Ringgold sits low, and the heat sits on top of it

Ringgold sits at roughly 778 feet, on the floor of a valley in Georgia's Ridge and Valley province. Taylor Ridge runs through town, split by a gap just east of the city center — Taylors Ridge south, White Oak Mountain north. The ridge tops out near 1,665 feet. That is nine hundred feet of rock over a town built in the bottom.

Valleys hold air. Still, humid, heavy air. Catoosa County is in IECC Climate Zone 4A, and Georgia's minimum energy code calls for R-49 at the ceiling here. The average July high in this area is around 90 degrees.

Your attic does not stop at 90.

Older homes and newer builds — we handle both

What actually happens up there in July

Building Science Corporation has measured it plainly. Summertime daytime attic air, in most places people live, runs 120 to 130 degrees. The underside of an asphalt-shingled roof deck runs 170 to 180. Put that on top of half an inch of ceiling drywall.

Fiberglass batts on an attic floor slow conduction. They do not stop air. Hot attic air moves through and around them, warms the drywall, and the drywall radiates down into the bedrooms. That is why upstairs runs hotter than the downstairs thermostat says it should, and why the upstairs unit is still calling for cooling at nine at night. The deck is still giving up heat it stored all afternoon.

The air conditioner does not fail. It never catches up.

The ductwork problem

Most Ringgold homes built in the last thirty-five years put the air handler and supply trunk in the attic. It is the worst thermal environment in the building.

Flex duct rated R-6 or R-8 sits in 130-degree air, trying to carry 55-degree supply air to a bedroom. Every foot of that run bleeds. Department of Energy Building America research found duct leakage commonly exceeds 20 percent of conditioned airflow, and that ducts in unconditioned vented attics add roughly 10 percent to a home's heating and cooling energy use.

Worse, when the return side leaks in a 130-degree attic, the system pulls attic air into the house. Dust, fiberglass, whatever else is up there.

Foam on the underside of the roof deck moves the thermal boundary. The attic stops being outdoors. It settles into the range of the rest of the house instead of a parked car. The ducts stop fighting a seventy-degree difference across their walls, and the air handler stops starting every cycle in an oven.

We are not making the ducts better. We are moving the weather off them.

Homes rebuilt after 2011

A real share of Ringgold's housing stock went up in 2012 and 2013, after the April 2011 storms. Those homes were framed to a modern code, and the framing is good. But code minimum insulation is a resistance value on an attic floor. It is not an air barrier.

We open 2012-built attics here constantly and find the same three leaks:

Top plates. The seam where interior wall framing meets the ceiling drywall. In a two-thousand-square-foot house that seam runs hundreds of linear feet. Almost none of it was sealed before the batts went in.

Recessed can lights. Older non-IC housings are vented by design. Even IC-rated cans leak at the trim and the wire entry. Every one is a chimney.

Bath fans. The housing gets set, the duct gets clamped on, and the gap around the housing never gets sealed. Sometimes the duct terminates in the attic instead of through the roof — a moisture problem on top of an air one.

A new house can pass inspection and still leak at all three.

Older valley homes and farmhouses

The other half of the housing stock is the opposite problem. Ringgold was founded in 1846 as a railroad town, and this valley farmed for a century before it became a Chattanooga bedroom community. There are 1920s and 1940s houses, post-war ranches, and farmhouses on the county roads carrying additions from three decades.

These attics are reached through a hatch in a hall closet. The insulation is whatever went in last — cellulose gone gray and compressed, batts over old framing, or nothing but boards. Balloon-framed walls run open from the crawl space straight to the attic. Chimney chases are open. Plumbing stacks have two-inch gaps around them.

These houses usually need the old material out first. You cannot air seal through eighty years of settled insulation.

Bonus rooms and knee walls

This is the call we get most in Ringgold subdivisions. The bonus room over the garage. The finished space behind a knee wall. Unusable June through September, cold enough in January that nobody sits in there.

The reason is geometry. A bonus room has attic on five of its six sides — knee wall attic left and right, low attic above the flat ceiling, unconditioned garage below, often a gable end. The insulation is batts stapled to the back of the knee wall studs, nothing holding them tight, no air barrier behind them. The 130-degree triangle attic presses on that room from both sides.

Sealing and foaming the roof deck brings the whole assembly inside. The knee wall attics stop being outdoor space. The room becomes a room.

Winter, and the stack effect

Ringgold winters are mild but not nothing. January lows here average around 31 degrees, and the valley collects cold air on clear nights.

Warm air rises. In a leaky house it leaves through the attic — through those same top plates, can lights and the hatch. As it goes out the top, the house pulls replacement air in at the bottom. Through the crawl space. Through the sill. Through outlets on exterior walls.

That is the stack effect, and it runs all winter. It is why your feet are cold on a hardwood floor while the furnace runs, and why one end of the house never warms up. Another layer of batts does not slow it, because the air goes around the batts, not through them. Sealing the top of the house is what stops it.

What the work looks like

We look first. Somebody from our crew gets into the attic, all the way to the eaves. Framing, ventilation, duct runs, the existing insulation, whether anything is wet or has been, where the bath fans terminate, whether the cans are IC-rated. Then we tell you what we found — including when the answer is that your attic is fine.

Removal when it is needed. Contaminated, rodent-damaged or badly settled material comes out first, vacuumed into sealed bags and hauled off. We do not foam over a mess.

Air sealing. Top plates, can light housings, plumbing and wire penetrations, chimney chases, the attic hatch, duct boots at the ceiling. This is the slow part and the part that matters.

Foam on the roof deck. Closed-cell or open-cell depending on the assembly, applied to the underside of the roof sheathing and carried down the gable ends and knee walls. Soffit vents get closed. The attic becomes part of the conditioned envelope — an unvented assembly the International Residential Code has recognized for years.

We clean up, then walk you through what we did.

Who is in your attic

The same crew, every job. Foametix does not subcontract. The people who look at your attic are the people who do the work, and the same people next time you call.

Veteran-owned, 17+ years in Chattanooga and North Georgia. If you want to talk about your attic, call us.

FAQs

My house was rebuilt after the tornado, so it's basically new. Do I still need this?

Probably, yes. Code-built is not the same as air sealed. We open 2012 and 2013 attics in Ringgold all the time and find open top plates, leaking can lights and unsealed bath fan housings. The framing is good. The air barrier is usually not there.

My air handler is in the attic. Is it better to move it or to foam the roof?

Moving it into conditioned space is a big job with a lot of ripple effects. Foaming the roof deck gets most of the same benefit without touching the equipment, because it brings the attic inside the envelope instead. We will tell you which one makes sense for your house after we look.

Do I have to take out my old insulation first?

Not always. If the existing material is dry, clean and undisturbed, we can often air seal and foam the deck with it in place. If it is rodent-damaged, wet, contaminated or flattened, it comes out. We tell you which one it is before we start, not after.

Will sealing my attic cause a moisture problem?

Not when it is detailed right. An unvented attic is a recognized code assembly, and the whole point is that you stop moving humid outdoor air across a cold surface. What causes trouble is a half-sealed attic — some vents closed, some open, foam in some spots and not others. We either do the assembly or we do not.

My bonus room over the garage is unusable in the summer. Can you actually fix that?

That is one of the most common calls we get in Ringgold. The room has attic on five sides and batts stapled to a knee wall with nothing behind them. Sealing and foaming the roof deck brings those knee wall attics inside and the room finally holds a temperature.