You've had two, three, maybe four HVAC contractors out. One quit. One told you nothing was wrong. One kept replacing parts. The humidity is still bad or the system still short-cycles. You're not crazy — foam houses are different.
You probably came here because…
- You've had multiple HVAC contractors out over 1–3 years
- Someone said 'we don't work on foam houses'
- Someone said 'the system is fine' but you know it isn't
- Parts keep getting replaced without solving the underlying issue
- You're wondering if you're going to have to gut the whole system
What’s actually happening
Most HVAC techs are trained on fiberglass-insulated houses. They diagnose problems by looking at temperature, refrigerant charge, and airflow. Those readings on a foam house often look normal even when the system is dramatically wrong for the load.
That's why so many contractors either walk away or misdiagnose. The system passes their standard tests. But the house is still uncomfortable because the whole envelope is different.
The fix isn't a mystery — but it usually requires accepting that the original installer sized the system wrong. Getting a second (or third) opinion from a foam-house-experienced contractor is worth doing before you spend more money on parts and service calls that won't help.
What we do about it
Get a foam-house-specific evaluation
Not another service call. A full evaluation that includes a Manual J load calculation, humidity readings across the house, and runtime analysis. Should cost $200–400. Worth every dollar to know what's actually wrong.
Get the truth about your current system
A good foam-house contractor should tell you: is your current system fixable, or is it structurally wrong for the house? Being oversized is not fixable with parts — it's fixable with a smaller replacement or a supplemental dehumidifier.
Decide: patch or replace
If the current system is 10+ years old and oversized, replacement makes sense. If it's newer, a supplemental dehumidifier or a mini-split addition may solve it for a fraction of a full replacement cost.
Document what previous contractors did
Bring all your previous invoices and quotes. A good specialist can spot the pattern — 'they replaced the capacitor three times, but the real issue is the coil is 2 tons too big for your load.' Saves you re-diagnosing everything from scratch.
Don't give up
Foam houses can be comfortable, efficient, and humidity-controlled — but only when the HVAC matches the envelope. If your last contractor quit or kept guessing, you need a specialist, not another generalist. Call (423) 637-1846. We've been doing foam houses for 20+ years and we don't quit.
Ready to fix it?
Call the family that’s been doing this in the Sequatchie Valley since 1996.