High-density R-21 batts for 2×6 wall framing. Wholesale pricing, same-day quotes, and next-day delivery anywhere in the U.S.
Next-day delivery · Pay at delivery · All 50 states
Most energy codes in colder climates require R-20 or higher for above-grade walls. R-21 satisfies this requirement and is the go-to spec for compliant 2×6 construction.
R-21 is a high-density batt. It's thinner than R-19 (5.5" vs 6.25") but denser, so it holds its shape in tall wall cavities and doesn't sag between inspections and drywall.
The 10% improvement in thermal resistance adds up over the life of the building. If you're already using 2×6 framing, upgrading from R-19 to R-21 costs very little per job.
Enter your square footage for an instant R-21 bag estimate.
Tell us: R-21, batt width (15" or 23"), quantity, zip code, and delivery date. We respond within the hour — same business day.
We confirm stock and send an itemized invoice with your exact delivery window. No vague lead times, no surprise markups.
Delivery next business day on stocked product. Verify the order on arrival, then pay at delivery. Payment at the time of delivery.
Both fit in a 2×6 cavity. R-21 is high-density — thinner but denser, with ~10% better thermal performance. Most climate zone 4+ codes now require at least R-20, making R-21 the standard choice. Full comparison →
Yes. 15" is for 16" on-center framing; 23" is for 24" on-center. Specify when you call or submit a quote so we pull the right product.
Next business day on stocked product when you order before 3pm EST. We deliver to all 50 states. Rush orders can sometimes be arranged — call to discuss.
Call or text with your quantity, width, and zip code. Same-day quote, next-day delivery on stocked product. Pay at delivery — payment at the time of delivery required.
Leave your number and what you need — we text or call you back with a quote the same day.
Or reach us directly: (929) 466-1426 · Text us