What is the R-value of a 4 inch foam board?
Individual foam board size: 4ft wide x 8ft long x 4 thick (32 sqft) r-value: r-20. Nominal density: 2. How does the r-value of spray foam compare to rigid foam board insulation? Spray foam has a higher r-value of about 5. However, it’s usually more expensive than rigid foam board, which has an r-value between 3.There are generally two types of foam board products available in the market today, pink and blue foam boards. They are both manufactured using polystyrene resin and perform virtually in a similar manner. They have an insulating R value of 5 per inch of thickness.
What thickness foam board insulation do I need?
For residential applications, the typical thickness of rigid insulation ranges from 1” to 3”, depending on the part of the house being insulated. For basement walls, a thicker foam board is often recommended because of its high moisture environment and the need for greater energy retention. Batt or roll insulation is commonly used in walls, attics, and floors. The thickness needed for maximum efficiency will depend on the R-value recommended for your climate zone. In colder regions, a minimum thickness of 3-4 inches is typically recommended, while warmer regions may only need 1-2 inches.For residential applications, the typical thickness of rigid insulation ranges from 1” to 3”, depending on the part of the house being insulated. For basement walls, a thicker foam board is often recommended because of its high moisture environment and the need for greater energy retention.The thickness of your attic insulation depends on your climate and local building codes. Typically, how much attic insulation you need is around 10-14 inches for mineral wool insulation or other materials to ensure proper thermal performance and reduce heat loss.
What is the difference between 150 and 250 foam board insulation?
You only need the 150 version for basement wall insulation. The difference between the two is the compressive strength of the material — the 150 version is good for 15 PSI, the 250 version is good for 25 PSI. Foamular 150 is a lower-density insulation product, while Foamular 250 is a higher-density product. This means that Foamular 250 is more resistant to compression and therefore provides better insulation performance.Rigid foam insulation packs more R-value per cubic inch than fiberglass insulation. If conserving energy is your main goal and there are no other influencing factors, such as moisture, rigid foam may be your first choice.Foam Board or Rigid Foam They provide good thermal resistance (up to 2 times greater than most other insulating materials of the same thickness), and reduce heat conduction through structural elements, like wood and steel studs.