Built for contractors who order pallets, partial truckloads, and full truckloads. EPS sheets, EPS fanfold, and XPS - one supplier, one phone call, one delivery.
We will help you specify correctly before you order. Toggle the PSI selector for residential or commercial guidance.
Standard expanded polystyrene sheets. Uniform coverage, easy layout, consistent R-value protection.
Folded EPS panels. 96 sq ft per bundle - three times the coverage of a standard 4x8 sheet, integrated vapor barrier built in.
Extruded polystyrene. Higher compressive strength, lower water absorption. The right call when the job is engineered, heavier, or moisture-sensitive.
PSI guidance: the correct PSI depends on load, reinforcement, and building use. Call us if the slab is unusual and we will work it through with you.
Three doors. Pick the one that fits where you are right now. Direct line, real human, family-owned.
Direct line. Family owned, central Illinois. If we are on a delivery, leave a message and we will call back the same business day.
We designed Tier One with the contractor in mind. Different jobs call for different types of insulation, and you can get them all in one place. We will help you specify correctly before you order.
Pallet, partial truckload, full truckload. Priced and routed for jobs that order in bulk and need it staged on schedule.
15 PSI, 25 PSI, fanfold, sheets, XPS. We talk through load, reinforcement, and building use so the slab gets what it needs.
Direct line to Alex. No call tree, no offshore counter, no pretending to be bigger than we are.
Eight-state delivery zone centered on Central Illinois. Routes that stay in our truck radius, not handed off to a broker.
Centered in Central Illinois. Pallet, partial truckload, and full truckload across the eight-state delivery zone.
Product geometry first, photos second. The shape of what you are ordering, drawn to scale.
EPS Sheets
EPS Fanfold
Pallet Tier
Built around contractors, run out of Central Illinois, answered by the owner.
Tier One Insulation is family owned and operated, based in Central Illinois. We carry three product lines for underslab work - EPS sheets, EPS fanfold, and XPS - and we deliver by the pallet, partial truckload, or full truckload across eight Midwest states.
The reason the catalog is tight: different jobs call for different types of insulation, and you can get them all in one place. One phone call, one delivery, one supplier who knows what 15 PSI versus 25 PSI means for your pour.
Alex answers the phone. If a job has an unusual load, weird drainage, or a tight pour window, talk it through before the order goes in. We will help you specify correctly before you order.
Email, call, or send a project sketch. Same-business-day callback.