

Compare Materials
Compare Materials
What's best for your build?
What's best for your build?
Attic Insulation
Attic Insulation
R-Value (per inch)
Air Permeance
Vapor Permeance
Water Resistance
Flame Spread Index
Compressible Strength
Noise Reduction

Open Cell SPF
(0.5lb)
View
3.9
Impermeable
Permeable
None
25 | 200 Smoke spread
Highly Compressible
STC 39
R-Value (per inch)
Air Permeance
Vapor Permeance
Water Resistance
Flame Spread Index
Compressible Strength
Noise Reduction

Closed Cell SPF (2.0lb)
View
6.7
Impermeable
Semi-Permeable
High
2325 | 165 Smoke spread
35 psi
STC 28
R-Value (per inch)
Air Permeance
Vapor Permeance
Water Resistance
Flame Spread Index
Compressible Strength
Noise Reduction

Roofing Foam
(3.0lb)
View
6.7
Impermeable
Impermeable
Waterproof
30 | 500 Smoke spread
55 psi
STC 23
R-Value (per inch)
Noise Reduction
Fire Resistivity
Water Resistance
Mold Resistance
Vapor Permeance
Air Permeance

Fiberglass Batt
View
3.9
STC 55
Fireproof
None
None
Permeable
Permeable
R-Value (per inch)
Noise Reduction
Fire Resistivity
Water Resistance
Mold Resistance
Vapor Permeance
Air Permeance

Mineral Wool
View
3
STC 38
Minimal
Available in waterproof variants
Does not harbor growth
Permeable
Permeable
R-Value (per inch)
Noise Reduction
Fire Resistivity
Water Resistance
Mold Resistance
Vapor Permeance
Air Permeance

Blown Cellulose
View
3.5
SYC 44
Impermeable
Waterproof
30 | 500 Smoke spread
55 psi
STC 23
R-Value (per inch)
Air Permeance
Vapor Permeance
Water Resistance
Flame Spread Index
Compressible Strength
Noise Reduction

Roofing Foam (3.0lb)
View
6.7
Impermeable
Impermeable
Waterproof
30 | 500 Smoke spread
55 psi
STC 23
R-Value (per inch)
Air Permeance
Vapor Permeance
Water Resistance
Flame Spread Index
Compressible Strength
Noise Reduction

Open Cell SPF (0.5lb)
View
3.9
Impermeable
Permeable
None
25 | 200 Smoke spread
Highly Compressible
STC 39
R-Value (per inch)
Air Permeance
Vapor Permeance
Water Resistance
Flame Spread Index
Compressible Strength
Noise Reduction

Closed Cell SPF (2.0lb)
View
6.7
Impermeable
Semi-Impermeable
High
2325 | 165 Smoke spread
35 psi
STC 28
1.
Spray Foam Formulations
A high-performance mode of insulation, spray foam achieves superior thermal and moisture performance through conforming to
whatever substrate it is sprayed against. Available in open cell (water blown) and closed cell (chemical blown) varieties, spray foam
is the ideal choice for any build with irregularities in the framing or envelope. Higher density closed cell foams are often utilized in
situations require top thermal performance and waterproofing.
A high-performance mode of insulation, spray foam achieves superior thermal and moisture performance through conforming to whatever substrate it is sprayed against. Available in open cell (water blown) and closed cell (chemical blown) varieties, spray foam is
the ideal choice for any build with irregularities in the framing or envelope. Higher density closed cell foams are often utilized in situations require top thermal performance and waterproofing.
R-Value (per inch)
Noise Reduction
Fire Resistivity
Water Resistance
Mold Resistance
Vapor Permeance
Air Permeance

Mineral Wool
View
3
STC 38
Minimal
Available in waterproof variants
Does not harbor growth
Permeable
Permeable
R-Value (per inch)
Noise Reduction
Fire Resistivity
Water Resistance
Mold Resistance
Vapor Permeance
Air Permeance

Blown Cellulose
View
3.5
STC 44
Minimal
None
None
Permeable
Reduces airflow when wet-blown
R-Value (per inch)
Noise Reduction
Fire Resistivity
Water Resistance
Mold Resistance
Vapor Permeance
Air Permeance

Fiberglass Batt
View
3.9
STC 55
Fireproof
None
None
Permeable
Permeable
R-Value (per inch)
Air Permeance
Vapor Permeance
Water Resistance
Flame Spread Index
Compressible Strength
Noise Reduction

Open Cell SPF (0.5lb)
View
3.9
Impermeable
Permeable
None
25 | 200 Smoke spread
Highly compressible
STC 39

Closed Cell SPF (2.0lb)
View
6.7
Impermeable
Semi-impermeable
High
2325 | 165 Smoke spread
35 psi
STC 28

Roofing Foam (3.0lb)
View
6.7
Impermeable
Impermeable
Waterproof
30 | 500 Smoke spread
55 psi
STC 23
2.
Fibrous Insulation
Traditional insulation usually employs a soft-spun or rigid fiber material that is hand-installed or blown into framing enclosures.
The most common insulation types are fiberglass (silicate composite material) and cellulose (recycled wood pulp), but increasing
mineral fiber (a product of stone or slag processing) is a popular option for fire-proofing and sound absorption.
R-Value (per inch)
Noise Reduction
Fire Resistivity
Water Resistance
Mold Resistance
Vapor Permeance
Air Permeance

Fiberglass Batt
View
3
STC 38
Minimal
None
None
Permeable
Permeable

Mineral Wool
View
3.9
STC 55
Fireproof
Available in waterproof variants
Does not harbor growth
Permeable
Permeable

Blown Cellulose
View
3.5
STC 44
Minimal
None
None
Permeable
Reduces airflow when wet-blown
© 2025 Mach Insulation. All rights reserved.
© 2025 Mach Insulation.
All rights reserved.