Norman's older homes near the OU campus — many built from the 1920s through the 1960s — have walls with no insulation at all. Injection foam fills those cavities without touching your drywall or plaster.
Norman, Oklahoma is a university town with deep roots and a housing stock that tells the story of nearly a century of growth. The neighborhoods closest to the University of Oklahoma — along Asp Avenue, Boyd Street, and throughout the Miller, Chautauqua, and Wilson Park Historic Districts — contain homes that date back to the 1920s, 1930s, and 1940s. These homes have character, charm, and solid construction. What they almost universally lack is wall insulation. When they were built, it simply was not done. The wall cavities were left hollow, and for decades, homeowners have lived with the drafts, high utility bills, and temperature swings that result from walls with no thermal barrier at all.
Injection foam insulation from Bo's Insulation finally gives Norman homeowners a practical, affordable, and non-destructive way to solve that problem. We fill the empty wall cavities in your home with high-performance tripolymer foam through small access holes — no drywall removal, no plaster damage, no renovation project. Just warm walls in winter, cool walls in summer, and energy bills that drop by 25-35% from the very first month.
Norman's housing history creates a distinct pattern of insulation needs. The oldest neighborhoods around the OU campus were established when the university was young, and the homes reflect the building practices of their era. Walls were framed with 2x4 lumber, sheathed in wood, covered with lath and plaster on the inside and clapboard siding on the outside. The wall cavities — the 3.5-inch space between the studs — were left completely empty. No fiberglass, no cellulose, no insulation of any kind.
As Norman grew through the mid-century decades, subdivisions expanded south and east. Homes built in the 1950s and 1960s in areas like Berry Road, Alameda Street, and the neighborhoods between Lindsey and Main Street were constructed with similar methods. While some had thin fiberglass batts installed, many did not, and even those that did are now 60-70 years old. The fiberglass has sagged, compressed, and lost much of its insulating value.
The consequences of uninsulated walls in Norman are felt year-round:
Injection foam addresses all of these problems in a single installation. By filling every wall cavity with solid foam, we create a continuous thermal and acoustic barrier that transforms how your Norman home feels and performs.
The injection foam process is designed to insulate existing walls without any demolition. Here is how Bo's Insulation performs the installation in Norman homes:
We start with a thorough assessment of your walls, identifying the stud spacing, wall depth, siding type, and any existing insulation. For Norman homes with wood clapboard, vinyl, or aluminum siding, we typically work from the exterior. We carefully remove a course of siding, drill a 1.5-inch hole into each stud bay, inject the foam, plug the hole, and replace the siding. The process is virtually undetectable when complete.
For Norman's many brick homes — including the handsome brick bungalows and colonials throughout the historic districts — we access the wall cavities from the interior. Small holes are drilled through the drywall or plaster between each pair of studs, and the foam is injected from inside. After filling, we patch the holes and the homeowner can paint over them. This approach completely preserves the exterior brick, which is often the defining architectural feature of these homes.
The foam itself is a slow-rising tripolymer formula that flows gently through the cavity, working around wires, pipes, and blocking without exerting damaging pressure. Unlike high-pressure spray foam, injection foam will not crack plaster, bow drywall, or push out siding. It fills every gap, void, and irregular space in the cavity, then cures in place permanently. It will never shrink, settle, or degrade.
Injection foam insulation in Norman typically costs between $2.00 and $4.50 per square foot of wall area. Here are typical price ranges for Norman homes:
The investment pays for itself through energy savings in most Norman homes within 3-5 years. For the older homes with completely empty wall cavities, the payback period is often shorter because the improvement is so significant. Bo's Insulation provides free, no-obligation estimates so you know the exact cost before making any decisions.
Injection foam for your walls is most effective when combined with a complete insulation strategy. Bo's Insulation offers these additional services for Norman homeowners:
We frequently recommend pairing injection foam wall insulation with attic insulation upgrades for Norman homes. The combination addresses heat loss through both walls and ceiling, delivering the most complete improvement in comfort and energy savings.
The homes near OU are among the best candidates in the entire OKC metro. Many were built from the 1920s through the 1960s with no wall insulation at all — completely empty cavities. Injection foam fills them entirely for a transformative improvement. Homeowners in these neighborhoods routinely report 30-40% reductions in utility bills.
Injection foam in Norman typically costs $2.00-$4.50 per square foot of wall area. A typical Norman home runs $3,500 to $9,000 for a whole-home project. Older frame homes near OU tend to be on the lower end, while larger homes or those with brick veneer cost more. We provide free estimates with transparent pricing.
No. Injection foam is specifically formulated to expand slowly and gently, without the force that could crack plaster or pop nails. We have insulated dozens of plaster-walled homes in Norman's historic neighborhoods without any plaster damage. It is one of the safest ways to add insulation to homes with original plaster and trim.
While injection foam does not make walls storm-proof, it significantly improves your home's ability to maintain comfortable temperatures during power outages. A well-insulated home retains interior temperature much longer when the HVAC system is offline, keeping your family more comfortable during severe weather and extended outages that are common in Norman.
From OU-area bungalows to mid-century ranches, injection foam fills empty wall cavities without demolition. Call today for your free estimate.