CostToBuildAHouse.com
Curious what it would cost to build in your area? We produce line-item estimates by ZIP code, plan size, and finish level — from nearly 20 years of construction data.
Comfort, Efficiency & Savings for Years to Come
Proper insulation improves comfort, reduces energy costs, and helps create a healthier, quieter home.
Pre-cut fiberglass or mineral wool batts fitted between studs, joists, and rafters.
ProsWalls, floors, and ceilings in standard framing.
Typical R-Value*R-13 to R-23 (walls)
R-19 to R-49 (floors)
R-30 to R-60 (ceilings)
Loose-fill insulation made from recycled paper treated for fire resistance, blown into cavities.
ProsAttics, wall cavities, and hard-to-reach areas.
Typical R-Value*R-13 to R-23 (walls)
R-30 to R-60 (ceilings)
Expands to fill gaps and cracks, providing air sealing and insulation in one step.
ProsInterior walls, attics, and rim joists.
Typical R-Value*R-3.5 to R-3.8 per inch
(R-13 to R-21 in 2x6 walls)
High-density foam that provides superior insulation, air sealing, and moisture resistance.
ProsExterior walls, roofs, basements, and crawl spaces.
Typical R-Value*R-6.0 to R-6.5 per inch
(R-20 to R-30 in 2x6 walls)
Climate zones help determine the right insulation levels for maximum comfort and efficiency.
Find your zone: energystar.gov
| Climate Zone | Attic / Ceiling (Polyester Batts) | Walls (Wood Frame) | Floors | Basement Wall |
|---|---|---|---|---|
| 7 | R-49 to R-60 | R-21 to R-23 | R-30 | R-15 to R-19 |
| 6 | R-49 to R-60 | R-19 to R-21 | R-30 | R-15 to R-19 |
| 5 | R-38 to R-49 | R-19 to R-21 | R-30 | R-15 |
| 4 | R-38 to R-49 | R-13 to R-15 | R-19 | R-10 to R-15 |
| 3 | R-30 to R-38 | R-13 to R-15 | R-19 | R-10 |
| 2 | R-30 to R-38 | R-13 to R-15 | R-13 | R-10 |
| 1 | R-30 to R-38 | R-13 to R-15 | R-13 | R-10 |
* R-values are minimum recommended levels. Local codes may require higher R-values.
Air Sealing: Prevent air leaks for maximum performance.
Moisture Control: Proper ventilation prevents mold and moisture damage.
Installation Quality: Professional installation ensures the best results.
Total R-Value: Higher R-values improve comfort and reduce energy costs.
Lower energy bills year-round
More consistent indoor temperatures
Quieter, more comfortable living spaces
Helps protect the environment by reducing energy use
Increases home value and durability
| Insulation Type | R-Value (per inch) | Air Sealing | Moisture Resistance | Cost | Best For |
|---|---|---|---|---|---|
| Batt Insulation | R-3.0 to R-4.3 | Good | Low | $ | Standard walls, floors, ceilings |
| Blown-In Cellulose | R-3.2 to R-3.8 | Very Good | Medium | $ | Attics, walls, hard-to-reach areas |
| Spray Foam (Open Cell) | R-3.5 to R-3.8 | Excellent | Low | $$ | Attics, interior walls |
| Spray Foam (Closed Cell) | R-6.0 to R-6.5 | Excellent | High | $$$ | Exterior walls, roofs, basements |
Every home is different. A Cost To Build report gives you a line-item breakdown for your specific ZIP code, plan size, and finish level — from a company with nearly 20 years of construction cost data.