What is the R-value of blue board?
STYROFOAM extruded polystyrene insulation is rated at an R-value of 5.0 per inch at 75°F. The material R-value for the entire wall assembly is derived by adding an R-value of Styrofoam0.
What is the R-value of 2 inch foam board?
Foam Board Insulation R-Value per inchThickness (in Inches)R-value (in I-P/Imperial)RSI (R-value in Metric)1.06.21.081.59.31.622.012.42.162.515.52.76 more rows
What is the highest R-value foam board?
PolyisocyanurateChoose the right type of rigid foam for your needs Polyisocyanurate: Known as polyiso for short, polyisocyanurate foam has the highest R-value per inch (R-6.5 to R-6.8) of any rigid insulation. This type of rigid foam usually comes with a reflective foil facing on both sides, so it can also serve as a radiant barrier.
What is the R-value of 3 inch foam board?
R-Value Chart for EnerfoilTM Rigid Foam Faced InsulationThickness (Inches)R-value (in I-P/Imperial)RSI (R-value in Metric)2.012.42.162.515.52.73.018.63.243.521.73.786 more rows•Dec 13, 2018
Does stacking foam insulation increase R-value?
Foam board insulation is a great alternative to the very common fiberglass batt insulation that is in most of our homes. It has a higher R-Value per inch of thickness, it's resistant to moisture and is easy to work with.Jan 7, 2019
What is the R-value of 1.5 inch foam board?
Thickness: 1.5 inch. Sheet Size: 4' x 8' R Value: 7.5.
What is the R-value of 2 inch blue Styrofoam?
A wall utilizing STYROFOAM T-MASS Technology with a 2-inch exterior layer and a 4-inch interior layer of concrete along with a 2-inch layer of STYROFOAM extruded polystyrene insulation would result in a material R-value of approximately 11.33.
What is the R-value of 1 inch foam board?
3.6 to 4.2 per inchR-values can range from 3.6 to 4.2 per inch.
Which side of foam board insulation faces out?
If you're wondering whether to put the foil side of foam insulation board shiny side in or out, consider whether you want to make the space inside warmer or cooler. If you want to make the space warmer, the foil should face inside so it can reflect radiant heat back into the room.
Does foam board insulation need a vapor barrier?
Foam insulation usually does not require a vapor barrier. For some foam insulation types, such as closed-cell spray foam and foam board insulation, the insulation itself stops the movement of most water vapor.Jul 18, 2021
Can you put fiberglass insulation over foam board?
0:051:50Should I Put Foam Board Over Fiberglass | How to Insulate Crawl ...YouTubeStart of suggested clipEnd of suggested clipEven if you made sure that the fiberglass insulation. Was completely dry you could actually have aMoreEven if you made sure that the fiberglass insulation. Was completely dry you could actually have a leak and trap the in the moisture. Inside between the subfloor and the foam board in the future.
How thick should insulation board be?
½ inch to 2 inchesRigid board insulation generally comes in standard thicknesses ranging from ½ inch to 2 inches. It is possible for homes located in extreme climates to order specialty thicknesses of up to 6 inches directly from certain manufacturers. Obviously, the thicker the rigid board, the higher the insulation capacities.Apr 16, 2020
What is blue board insulation?
Dupont Styrofoam™ Insulation (Blue Board) is a nonstructural, rigid board insulation manufactured of Extruded Polystyrene Foam (XPS). Blue Board can be used both on exterior and interior walls to give you a continuous insulation barrier that can increase effective R-value of the wall by up to 20%. First manufactured by Dow in 1941, Dow/Dupont's blue colored extruded polystyrene has been an industry leader ever since. Extruded Polystyrene Foam offers high, long-term R-value and excellent compressive strength. Blue Board's closed cell structure and lack of voids resists moisture penetration thus increasing its thermal efficiency and protecting underlying materials from water damage. When used with Weathermate construction tape to cover seams and Great Stuff sealants to seal gaps, Dupont Styrofoam™ insulation board provides a barrier against air leakage and infiltration.
What is weathermate tape?
WEATHERMATE™ Construction Tape from Dow is recommended to seal the joints and seams of WEATHERMATE™ housewraps and STYROFOAM™ insulated sheathings. In these applications,WEATHERMATE Construction Tape enhances resistance to moisture and...
What is Insulation R-Value?
Insulation ratings are measured in R-values per inch of thickness. An R-value tells you how well a type of insulation can keep heat from leaving or entering your home. Insulation R-values vary based on the type, thickness and density of the insulation material.
R-Value U.S. Map
Your home doesn’t necessarily need the highest R-value insulation. The R-value your insulation needs depends on your local climate.
R-Value Insulation Chart
Find your zone on the map and then use the above insulation R-value chart to determine the level of insulation you need to properly insulate your attic, walls, floors and crawlspaces. These R-values are a sum, meaning this should be the total R-value once you add up the entire depth of insulation.
Achieving Greater R-Values in Attics
Insulation ratings can be improved by adding more layers of insulation. You can mix the type and material of insulation too. For example, if your attic already has fiberglass insulation blankets installed, you can improve its R-value by installing blown-in cellulose insulation on top of the blankets.
Achieving Greater R-Values in Exterior Walls
As with attics or anywhere else in your home, adding more layers of insulation to your exterior walls is key to having a higher R-value and better thermal performance. Foam board insulation is easy to install between wall studs and over existing blanket insulation. Seal gaps around windows and doors with spray foam insulation.
Other Areas to Insulate
In addition to attics and exterior walls, you can get greater R-values for your home by remembering to insulate these areas as well:
What is EPS insulation?
EPS is used under roofing, over foundation walls and beneath siding. Extruded Polystyrene. This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. It is denser than EPS and provides more R-Value with a rating of 5 per inch of thickness. This foam board insulation is available ...
What is the best insulation for a batt?
Foam board insulation is a great alternative to the very common fiberglass batt insulation that is in most of our homes. It has a higher R-Value per inch of thickness, it’s resistant to moisture and is easy to work with.
How thick is foam board insulation?
It comes in standard-size 4×8 sheets, and smaller sizes, in many different thicknesses from 1/4 inch to 2 inches. Some types of thicker foam board insulation are available, but they may need to be special ordered.
What is the R value of polyiso?
Polyiso (Polyisocyanurate). This is an even more dense and more expensive foam board insulation. It provides an R-value of 6 per inch of thickness and often comes foil-faced to help reflect radiant heat.
Is foam board insulation good for a basement?
Because of its resistance to moisture, foam board insulation is a great choice whenever and wherever there is a chance it could get wet, such as: an exterior foundation, inside a basement against the foundation, and on the outside of a house beneath a house wrap. Foam board insulation is more expensive than traditional batt insulation, ...
What is blue foam?
Blue foam products intended to be used as sheathing on exterior walls are faced with thin plastic films that protect the board's extruded polystyrene core and add extra strength to the board. Boards intended for interior walls are unfaced, but some of them include convenience features such as notches at the edges to accommodate wood nailing strips. Other blue foam products are designed for roofing or cavity wall applications. High-density blue foam products are designed to resist compression under heavy loads when they're used beneath concrete slabs.
What is the difference between pink and blue foam boards?
Both pink and blue foam boards are rigid insulation panels made from extruded polystyrene. The chemical composition, manufacturing process and insulating capability of the two products are similar; the principal difference between them is that they are manufactured by two different companies. Pink foam board is manufactured by Owens Corning, and it's marketed under several different brand-specific product names, including Foamular, Propink, Thermapink, and Insulpink. Blue foam board is manufactured by Dow Chemical Co., and it's marketed under the Styrofoam brand name.
What is pink foam board?
Unique specialized pink foam products include a below-grade foundation insulation board with drainage channels on the surface of the board and a filtration fabric facing that prevents soil from clogging the channels. Owens Corning also offers a pink foam product manufactured with precise thickness tolerances for applications in which a tight connection between the board and an adjacent surface is necessary.
Is polystyrene insulation more expensive than extruded polystyrene?
Expanded polystyrene insulation is less expensive than extruded polystyrene, but it is also more fragile and is a less effective insulator. Polyisocyanurate panels, also called ISO panels, consist of a rigid foam core sandwiched between foil or fiberglass facings.
Who is Evan Gillespie?
Evan Gillespie grew up working in his family's hardware and home-improvement business and is an experienced gardener. He has been writing on home, garden and design topics since 1996. His work has appeared in the South Bend Tribune, the Fort Wayne Journal-Gazette, Arts Everywhere magazine and many other publications.
