About Knight Insulation
Wymond Hall, Owner & Operator
Knight Insulation is owned and operated by Wymond Hall, based in Sioux Falls, South Dakota. Wymond’s standard on every job is the same: do it right, communicate clearly, and don’t leave until it’s done correctly.
Why we don’t insulate over a problem
Most insulation problems trace back to a company that skipped a step to win a low bid — installing new insulation straight over rodent damage, pest contamination, or an air leak instead of fixing it first. Knight Insulation doesn’t work that way. We remove the damaged material, handle the underlying issue, and then insulate — so the job actually performs instead of just looking finished.
We keep every estimate free and in-person for the same reason: an insulation quote given without seeing the space is usually wrong. We walk the attic, crawlspace, or framing, tell you what we’d actually recommend, and give you a number you can hold us to.
Credentials
- Licensed and insured in South Dakota
- 2024 Quality Business Award winner, Sioux Falls
- HomeAdvisor / Angi verified
- No subcontracting — Wymond on every job
Want to talk through your project first?
Free on-site estimates — call, text, or send the form.