Most Lehi homes were sold with the basement unfinished. Insulating it right is the difference between a cold storage room and space that actually adds square footage.
Basement insulation is where every finish-out project in Lehi should start, before drywall, before flooring, before the framing crew even shows up. We insulate foundation walls, rim joists, and sill plates to Utah's code-required R-value, so the room stays warm, the moisture stays out, and your finishing permit doesn't get flagged. Free inspection, an honest assessment of what your basement actually needs, and a flat written price before anyone touches a wall.
Takes about 30–45 minutes. No cost, no pressure.
Walk through Traverse Mountain, Holbrook Farms, or any newer Lehi subdivision and you'll find the same thing downstairs: an unfinished basement, poured and framed, waiting. Most Lehi builders deliver the basement as bare concrete and open studs, and leave finishing it to the homeowner.
That's turned into one of the biggest home projects in Utah County right now. Families are finishing basements into extra bedrooms, home gyms, and media rooms. A growing number are going further and building a basement ADU or a legal rental unit, both to house aging parents and to offset a mortgage in a market where housing costs keep climbing. Every one of those projects starts in the same place: insulating the foundation walls and rim joist before anything else goes in. Skip it or under-spec it, and you're paying to heat and cool concrete for the life of the house.
Same crew, same measure-before-we-quote approach as every job we run, sized for whatever stage your basement is at.
Batt, rigid foam, or a combination sized to meet Utah's basement wall requirement, whichever path fits your framing and budget. Installed tight to the concrete with no gaps at the sill or the corners, where most heat loss actually happens.
The band of framing where your foundation meets your main floor is almost always the coldest, leakiest spot in the house. We seal and insulate it as a standard part of every basement job, not an upsell.
Insulating a basement wall without addressing moisture first traps water against your framing. We check for signs of water intrusion and install the right vapor strategy for your specific wall assembly before insulation goes in.
Turning a basement room into a legal bedroom means an egress window and code-compliant insulation around that opening. We frame and insulate to pass inspection the first time, not after a re-do.
Building a basement apartment or mother-in-law unit adds a sound and thermal separation requirement on top of the standard code path. We insulate the ceiling and demising walls for privacy between units, not just the exterior walls.
If your main floor is cold above an unfinished basement, the fix usually isn't your attic, it's the rim joist and subfloor below you. We diagnose which one it actually is before recommending work.
Lehi sits in IECC Climate Zone 5B, and Utah's 2021 energy code gives basement walls three compliant paths. You don't have to guess which one applies, we size the job to hit code and tell you which path we used.
Most unfinished Lehi basements have bare concrete walls with no insulation at all. Going from zero to any of the three code paths below is a real jump in comfort and a real jump in your heating bill in January.
Any of the three satisfies the same requirement. Which one makes sense depends on your framing, your finished ceiling height, and whether you're insulating before or after the walls are framed. We walk you through the tradeoff before you commit.
Every basement job starts with an inspection of the actual foundation, framing, and any existing moisture issues, not a generic square-footage estimate over the phone.
Basement finishing means a framer, an electrician, and a plumber are all touching the same space. We schedule insulation at the right point in that sequence so nobody's waiting on anybody.
If your basement finish needs a permit, egress-compliant insulation around the window and a code-correct wall assembly matter at inspection time. We build it right the first time.
Basements are tight, dusty spaces. Drop cloths, contained cutting, and a swept floor when we leave, so the next trade isn't working around our mess.
Yes. Insulation and air sealing go in before drywall, because once the walls are closed up you can't get back into the stud cavities or the rim joist. Trying to add it later means opening the wall back up.
Lehi is in Climate Zone 5B, and Utah's 2021 energy code accepts three paths: R-15 continuous insulation, R-19 in the stud cavity, or R-13 in the cavity plus R-5 continuous. Any of the three satisfies the code, which one fits your project depends on your framing and finished ceiling height.
It should be treated as its own detail. The rim joist, where your foundation meets your main floor framing, is a different assembly than the foundation wall and is usually the single coldest, leakiest spot in a Lehi basement. We seal and insulate it as standard on every job.
Sometimes, and sometimes the fix is somewhere else entirely. If your main floor is cold above an unfinished basement, the rim joist and subfloor below you are the likely cause, and basement work fixes it. If the cold spot is upstairs bedrooms under the attic, that's a separate problem. We diagnose which one you actually have before recommending work.
A basement finish that adds a bedroom, bathroom, or living space typically needs a permit from Lehi City, and insulation is part of what gets inspected. We build to the code-compliant path so your inspection isn't held up on our end.
Yes, and it's a different scope than a standard finish. A basement ADU or rental unit needs sound and thermal separation between units, which means insulating the ceiling and demising walls in addition to the standard exterior wall and rim joist work. We size the job for that from the start rather than treating it as a standard basement.
The inspection is free and takes under an hour. We'll tell you exactly which code path fits your framing and what it costs, in writing, before any work starts.
Call (801) 348-3113Same business day, Mon–Fri.