Wymond Hall, Owner · Licensed, Bonded & Insured
Whatever the season throws at Sioux Falls, your walls hold the line.
Knight Insulation installs blown-in, batt, and rigid board insulation for homes and businesses across the Sioux Falls area — sized for South Dakota winters, not a mild-climate average.
Family-run · Free on-site estimates · Residential & commercial
Recent work
Two jobs, two different methods.
Every insulation job calls for a different approach depending on the framing, the climate zone, and what the space is used for.
Services
One job: keep the temperature you paid for inside your building.
Every service below solves that from a different angle — pick the one that matches your project, or call and we’ll tell you which one actually applies.
Blown-In Insulation
Cellulose or fiberglass blown into attics and closed wall cavities — the fastest way to bring an older Sioux Falls home up to a modern R-value.
See blown-in →Batt Insulation
Fiberglass or mineral wool batts fitted between studs and joists — the standard, cost-effective choice for open framing in new construction and additions.
See batt insulation →Rigid Board Insulation
Continuous R-value on garages, shops, and exterior sheathing — added over or behind the framing, not between it.
See rigid board →Attic Insulation
Attics lose more heat than any other part of the house. We check ventilation and air-sealing first, then insulate so it actually stays put.
See attic insulation →Commercial Insulation
Metal buildings, shops, and commercial builds in and around Sioux Falls, scheduled around your contractor’s timeline.
See commercial →Free On-Site Estimates
We walk the space, measure what’s actually there, and give you a straight number — no upsell script.
Request an estimate →What actually sets us apart
We don’t insulate over a problem.
Most insulation callbacks trace back to one shortcut: installing new material straight over rodent damage, pest contamination, or an air leak instead of fixing it first. Owner Wymond Hall built Knight Insulation around not doing that.
- Damaged or contaminated material removed before anything new goes in
- Entry points and air leaks addressed, not just covered
- The job that actually performs, not the job that just looks finished
- Owner-operated — no subcontracting, no rotating crews
How a project runs
From first call to final walk-through
Call or send the form
Tell us what you’re insulating — a room, an attic, a whole build — and roughly when.
Free on-site estimate
We look at the space in person, check current insulation and air-sealing, and give you a firm number.
Insulation installed
Blown-in, batt, or rigid board — whichever method fits the space, installed by our crew, not a subcontractor.
Walk-through & cleanup
We show you what was done and clean up the site before we leave.
Ready for a free estimate?
Call, text, or send the form — we’ll get back to you the same day.