0.5 lb Spray Foam Insulation
0.5 lb Spray Foam Insulation is a high yield, high quality product that is essential for today's rising energy costs
- Achieves an R-Value of 3.9 per inch
- Provides dramatic savings in heating & cooling costs
- Creates a seamless air barrier
- Helps to eliminate the growth of mold
- Breathes (very slowly, still is an effective air barrier)
- Provides excellent noise reduction due to softness
- Lowest cost among different foam types
Physical Properties
- Density: 0.50-0.65 lb/cu. ft. ASTM D-1622
- Closed Cell Content: < 6% ASTM D-2856
- K-Factor: 0.255 ASTM C-518
- R-Value: 3.922
Surface Burning Characteristics
- ASTM E-84
- Foam Thickness - 6"
- Flame Spread - 10
- Smoke Development - 250
Important note: the results shown are typical laboratory results and are not intended to reflect hazards presented by this or any other material under actual fire conditions. The results above make this a Class 1 building material.
Product Comparisons
| Positive Features | 0.5 lb Spray Foam | Fiberglass Batts | Cellulose | Blown-in Fiberglass |
|---|---|---|---|---|
| R-Value per inch | 3.9 | 3.9 | 4.0 | 3.2 |
| Provides a seamless air barrier | ![]() |
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| Perfect fit every time | ![]() |
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| Blowing/foaming agent: water | ![]() |
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| Contains no formaldehyde | ![]() |
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| No harmful emissions after installation is complete | ![]() |
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| Potential for down-sized HVAC | ![]() |
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| Doesn't shrink, settle or sag over time | ![]() |
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| Effectively reduces airborne sound transfer | ![]() |
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| Not damaged by water | ![]() |
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| Stops airborne moisture transfer | ![]() |

High performance insulation which offers unbeatable cost/benefit ratios
Some quick facts about 0.5 lb spray foam insulation are:
- Breathes (very slowly, still qualifies as an effective air barrier)
- Not a vapor barrier
- Lowest cost per installed R-value among all types of foam
- R-value of 3.9 per inch
- May be applied in any thickness in a single pass (low labor costs in attic and similar applications)
Case Studies
There is a lot of talk about how much a home insulation with spray foam can save versus a house insulated via traditional methods. We have listed a few case studies below to show some real statistical data on the savings that can be had by insulating your house with spray foam insulation.
Case Study #1
- Sacramento, CA
- Comparable single story 2,400 square foot homes
- Several addresses apart on same side of street
- Gas and electric bills Feb to Dec, 2003
Traditionally insulated home: |
Closed-cell spray foam insulated: |
Energy savings: |
Utility bills
|
Total gas and electric
|
48% reduction in utility bills
|
Monthly average utilities
|
Monthly average utilities
|
How much extra financing could you afford on a 30 year mortgage with an extra $118 per month? |
Average utility prices
|
Average utility prices
|
|
Note: in our experience, a contractor might charge about $5,000 more for EnduraTite™ foam insulation compared with traditional fiberglass. If financed as part of the mortgage, the additional monthly cost is about $27 compared with $118 monthly savings.
Vapor Barriers:
A material that prevents the migration of water vapor across it.Videos
Calculators
Technical Data
At CPi we are proud distributors of E:zero Spray Foam Products. We
offer the complete line of products from E:zero which include their seasonal
blends of 0.5 lb and 2.0 lb spray foams.
Below you will find a complete selection of E:zero's technical papers:
- Technical Data Sheet (TDS) for 0.5 lb Spray Foam

- Material Safety Data Sheet (MSDS) for 0.5 lb Spray Foam
- Spray Guide

- Technical Data Sheet (TDS) for 2.0 lb Spray Foam
- Material Safety Data Sheet (MSDS) for 2.0 lb Spray Foam

Building Science and The Building Envelope
Building science is the collection of scientific knowledge dealing with the analysis and control of the physical aspects of buildings. One of the major branches of building science is the building envelope which includes insulation and waterproofing, among others.
Foam contractors should understand the following building science subjects in detail:- R-values
- ACH – (involuntary) Air Changes per Hour
- Vented vs. unvented attic design
- Sound Control
- Health
- Environmental impact (or lack thereof)
- And many more
R-Values
- Heat transfer occurs by three means: conduction, convection and radiation. R-value only measures conduction.
- The R-value test is conducted at 75°F, not 30°F, 100°F or any other temperature for a special reason. The explanation is that with the exception of polyurethane foam insulation, most insulation materials deliver their peak performance at 75°F, which sharp performance losses when it is hotter or colder. By the way, at 75°F you don’t need insulation.
- The R-value test in the laboratory is done in a wind still box. The test would only be relevant if you built your house inside another, airtight building.
| R-Values for Common Insulation Types | |||
| Closed-Cell Spray Foam | Open-Cell Spray Foam | Fiberglass Batts | Cellulose |
| 6.5 | 3.9 | 3.9 | 4.0 |
Note: the values shown are R-value per inch. Accordingly, 3 inches of closed-cell foam equate to R-19.5 compared with R-10.8 for fiberglass batts.
R-Value Calculator
Attic Ventilation
Attics or roofs can be designed and constructed to be either vented or unvented in any hygro-thermal zone (Map 1). The choice of venting or not venting is a design and construction choice, not a requirement determined by the physics or by the building code. Model codes allow both vented and unvented roof assemblies. The applicable physics impact the design of attic or roof systems, as does the applicable building code, but neither limit the choice.
Throughout the balance of this paper, the terms attic and roof will and can be used interchangeably.
In cold climates, the primary purpose of attic or roof ventilation is to maintain a cold roof temperature to control ice dams created by melting snow, and to vent moisture that moves from the conditioned space to the attic. Melted snow, in this case, is caused by heat loss from the conditioned space. The heat loss is typically a combination of air leakage and conductive losses. The air leakage is due to ex-filtration from the conditioned space (often because a ceiling air barrier is not present) and from leaky supply ductwork (often because ductwork located in attics is not sealed) and from penetrations like non-airtight recessed lights. The conductive losses are usually from supply ductwork and equipment located in attic spaces above ceiling insulation (ductwork is typically insulated only to R-6 – whereas ceiling insulation levels are above R-30). Conductive losses also occur directly through insulation, or where insulation is missing or thin.
In hot climates, the primary purpose of attic or roof ventilation is to expel solar-heated hot air from the attic to lessen the building’s cooling load.
The amount of attic cavity ventilation is specified by numerous ratios of free vent area to insulated ceiling area ranging from 1:150 to 1:600 depending on which building code is consulted, the 1:300 ratio being the most common.
Control of ice dams, moisture accumulation and heat gain can also be successfully addressed by unvented attic or roof design.
Take a more detailed look into Attic Ventilation >Air Control and Loss
All houses and buildings are constantly both losing air and allowing
area to enter into the structure through various different locations as
seen in the picture to the right. It is important to control this air
movement as much as possible by reducing the Air Changes Per
Hour or ACH.
Air Changers Per Hour (ACH)
ACH is a measurement to determine the involuntary (or unintended) air changes per hour of a whole building. The intended air changes are open doors and windows as well as ventilation. For test purposes, one would close all windows, doors and turn off ventilation, and then conduct a so-called door-blower test. This test will reveal how much air is lost. Typical values are about 0.7 ACH for fiberglass and 0.1 ACH for foam insulation. Translation: a home of normal quality and without defects will lose 70% of its interior air every hour if it is insulated with fiberglass, whereas it will only lose 10% each hour if insulated with foam. This is the real reason why foam saves about 50% in energy compared with fiberglass: the interior air does not escape 17 times each day, but only 2 times.- Fiberglass has a 0.7 ACH (70%) vs. Spray Foam Insulation has a 0.1 ACH (10%)
- What the above means is that 70% of interior air is lost involuntarily each hour through the building envelope
- Using standard fiberglass insulation 17 times a day all of your heating and a/c will be lost vs. 2.4 times a day when using spray foam insulation.
Spray Foam Insulation is the most efficient insulation available today.
With savings of 60% available on your heating and cooling costs there is no comparison. Take a look at the long list of other benefits you can achieve by using spray foam insulation:
Comfort
- Spray foam insulation greatly reduces drafting air throughout your house
- Create a consistent and comfortable temperature throught your house whether one, two or even three levels
Health
- Spray foam provides a dramatic increase to
indoor air quality

- With the creation of an air tight seal dangerous mold and damaging condensation are no longer a concern
- Reduce the infiltration of outside air pollutants and gases
Environment
- Spray foam insulation greatly reduces your carbon footprint by lowering your CO2 emissions and conserving energy
- The addition of spray foam insulation to your home provides significant structural integrity to withstand high winds
- Spray foam contains no formaldehyde or other ozone depleting substances
Value
- A house insulated with spray foam will see instant reductions in heating and cooling costs upwards of 60%
- Heating and Air Conditioning equipment can be downsized
- Spray foam insulation will never sag or settle as is the case with other insulation methods
Case Studies
There is a lot of talk about how much a home insulation with spray foam can save versus a house insulated via traditional methods. We have listed a few case studies below to show some real statistical data on the savings that can be had by insulating your house with spray foam insulation.
Case Study #1
- Sacramento, CA
- Comparable single story 2,400 square foot homes
- Several addresses apart on same side of street
- Gas and electric bills Feb to Dec, 2003
Traditionally insulated home: |
Closed-cell spray foam insulated: |
Energy savings: |
Utility bills
|
Total gas and electric
|
48% reduction in utility bills
|
Monthly average utilities
|
Monthly average utilities
|
How much extra financing could you afford on a 30 year mortgage with an extra $118 per month? |
Average utility prices
|
Average utility prices
|
|
Case Study #2
- Roanoke, VA
- 2,240 square foot ranch
- Liquid propane gas heat
- Low fuel consumption got supplier's attention
- Monitored propane usage Aug '00 to Jul '01
Ten similar homes with traditional insulation: |
Closed-cell spray foam insulated: |
Energy savings: |
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|
|
Case Study #3
- Atlanta, GA
- Comparable residences 1,800 sq. ft.
- Less than two miles apart
- Similar occupancy
Traditionally insulated home: |
Closed-cell spray foam insulated: |
Energy savings: |
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Comparsion Charts and Tables
Although both 2.0 lb and 0.5 spray foam are the most effective insulation methods available to homeowners today there are some differences between the two products. One of the largest differences in the ability to keep out water, 0.5 lb spray foam will very slowly allow water to travel through it where 2.0 lb spray foam is completely waterproof and actually recommended by FEMA as a waterproof material.| 2.0 lb Spray Foam | 0.5 lb Spray Foam | |
|---|---|---|
| R-Value per inch | 6.5 | 3.9 |
| Provides a seamless air barrier | ![]() |
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| Waterproof | ![]() |
|
| No HFAs, HCFCs, or CFCs used | ![]() |
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| Contains no formaldehyde | ![]() |
![]() |
| Stronger | ![]() |
Air Control and Loss
All houses and buildings are constantly both losing air and allowing
area to enter into the structure through various different locations
as seen in the picture to the right. It is important to control this
air movement as much as possible by reducing the Air Changes
Per Hour or ACH.
Air Changers Per Hour (ACH)
An expression of ventilation rates - the number of times in an hour that a home's entire air volume is exchanged with outside air.- Fiberglass has a 0.7 ACH (70%) vs. Spray Foam Insulation has a 0.1 ACH (10%)
- What the above means is that 70% of interior air is lost involuntarily each hour through the building envelope
- Using standard fiberglass insulation 17 times a day all of your heating and a/c will be lost vs. 2.4 times a day when using spray foam insulation.
State-of-the-art building envelope. Insulation with extra benefits. Minimization of design liabilities.
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Building Science and The Building Envelope
Building Science is a complex topic of understanding with such topics
as:
Building Science is defined as: involving the application of basic
knowledge and analysis procedures to the design of buildings. There is a
special knowledge and experience required, and such expertise is also
beneficial in determining how to correct problems in existing buildings
and to explain what went wrong to cause the problem.
R-Values
| R-Values for Common Insulation Types | |||
| Closed-Cell Spray Foam | Open-Cell Spray Foam | Fiberglass Batts | Cellulose |
| 6.5 | 3.9 | 3.9 | 4.0 |
R-Value Calculator
Attic Ventilation
Attics or roofs can be designed and constructed to be either vented or unvented in any hygro-thermal zone (Map 1). The choice of venting or not venting is a design and construction choice not a requirement determined by the physics or by the building code. The model codes allow both vented and unvented roof assemblies. The applicable physics impacts the design of attic or roof systems as does the applicable building code but neither limit the choice.
Throughout the balance of this paper the terms attic and roof will and can be used interchangeably.
In cold climates, the primary purpose of attic or roof ventilation is to maintain a cold roof temperature to control ice dams created by melting snow, and to vent moisture that moves from the conditioned space to the attic. Melted snow, in this case, is caused by heat loss from the conditioned space. The heat loss is typically a combination of air leakage and conductive losses. The air leakage is due to exfiltration from the conditioned space (often because a ceiling air barrier is not present) and from leaky supply ductwork (often because ductwork located in attics is not sealed) and from penetrations like non-airtight recessed lights. The conductive losses are usually from supply ductwork and equipment located in attic spaces above ceiling insulation (ductwork is typically insulated only to R-6 – whereas ceiling insulation levels are above R-30). Conductive losses also occur directly through insulation, or where insulation is missing or thin.
In hot climates, the primary purpose of attic or roof ventilation is to expel solar heated hot air from the attic to lessen the building’s cooling load .
The amount of attic cavity ventilation is specified by numerous ratios of free vent area to insulated ceiling area ranging from 1:150 to 1:600 depending on which building code is consulted, the 1:300 ratio being the most common.
Control of ice dams, moisture accumulation and heat gain can also be successfully addressed by unvented attic or roof design
Take a more detailed look into Attic Ventilation >Air Control and Loss
All houses and buildings are constantly both losing air and allowing
area to enter into the structure through various different locations as
seen in the picture to the right. It is important to control this air
movement as much as possible by reducing the Air Changes Per
Hour or ACH.
Air Changers Per Hour (ACH)
An expression of ventilation rates - the number of times in an hour that a home's entire air volume is exchanged with outside air.- Fiberglass has a 0.7 ACH (70%) vs. Spray Foam Insulation has a 0.1 ACH (10%)
- What the above means is that 70% of interior air is lost involuntarily each hour through the building envelope
- Using standard fiberglass insulation 17 times a day all of your heating and a/c will be lost vs. 2.4 times a day when using spray foam insulation.
Technical Data
At CPi we are proud distributors of E:zero Spray Foam Products. We
offer the complete line of products from E:zero which include their seasonal
blends of 0.5 lb and 2.0 lb spray foams.
Below you will find a complete selection of E:zero's technical papers:
- Technical Data Sheet (TDS) for 0.5 lb Spray Foam

- Material Safety Data Sheet (MSDS) for 0.5 lb Spray Foam
- Spray Guide

- Technical Data Sheet (TDS) for 2.0 lb Spray Foam
- Material Safety Data Sheet (MSDS) for 2.0 lb Spray Foam

Calculators
State-of-the-art building envelope. Insulation with extra benefits. Minimization of design liabilities.
Home owners demand more. Energy efficiency is the obvious. Beyond that,
your clients now expect improved air quality, minimized health risks and
reduced environmental impact.
- Foam will deliver the energy efficiency expected today by
- minimizing the ACH from about 0.7 for conventional insulation down to 0.1 for foam insulation
- offering high R-values in narrow cavities when needed
- allowing custom-fit fill of all cavities regardless of shape or size due to spray application
- Health impact
- Foam insulation is inert and thus is no threat to health
- Allergy patients appreciate the opportunity to filter outdoor air at defined entry points
- Today’s insulation foam is made without formaldehyde or other dangerous chemicals. Unlike many conventional materials, foam is not and never has been carcinogenic.
- Spray foam does not disintegrate over time and shows no emissions
- Minimized liabilities and construction litigation
- Properly installed, foam insulation stops condensation in the wall and attic
- Mold is often considered a construction defect. The air seal provided by foam easily enables moisture control which in turn avoids mold
- Extra benefits
- Half pound insulation foam is water-blown, obviously without negative environmental impact
- Serious reduction of the carbon footprint of the home or building
- Full performance for the life of the building eliminates costly repair costs and reduces land-fills
- Foam insulation does not shrink, settle or sag and thus comes with a lifetime warranty
- 0.5 lb. foam does not disintegrate in case of water exposure; instead it dries out and retains full performance
- Half pound foam is so soft that even in severe earthquakes it will not crack.
When it comes to insulation, only foam will perform in line with 21st century expectations. Architects design the future today, and will thus embrace foam insulation.
Technical Data
At CPi we are proud distributors of E:zero Spray Foam Products. We
offer the complete line of products from E:zero which include their seasonal
blends of 0.5 lb and 2.0 lb spray foams.
Below you will find a complete selection of E:zero's technical papers:
- Technical Data Sheet (TDS) for 0.5 lb Spray Foam

- Material Safety Data Sheet (MSDS) for 0.5 lb Spray Foam
- Spray Guide

- Technical Data Sheet (TDS) for 2.0 lb Spray Foam
- Material Safety Data Sheet (MSDS) for 2.0 lb Spray Foam

Case Studies
There is a lot of talk about how much a home insulation with spray foam can save versus a house insulated via traditional methods. We have listed a few case studies below to show some real statistical data on the savings that can be had by insulating your house with spray foam insulation.
Case Study #1
- Sacramento, CA
- Comparable single story 2,400 square foot homes
- Several addresses apart on same side of street
- Gas and electric bills Feb to Dec, 2003
Traditionally insulated home: |
Closed-cell spray foam insulated: |
Energy savings: |
Utility bills
|
Total gas and electric
|
48% reduction in utility bills
|
Monthly average utilities
|
Monthly average utilities
|
How much extra financing could you afford on a 30 year mortgage with an extra $118 per month? |
Average utility prices
|
Average utility prices
|
|

Proportioners
Spray Guns
Spray Hoses
Transfer Pumps
Safety & Protection
Gensets &
0.5lb Open-cell Spray Foam
2.0lb Closed-cell Spray Foam
3.0lb Roofing Foam
Sealants
1.0lb Kits
2.0lb Kits
3.0lb Kits





