Eps is suitable for ground contact and can be treated to resist.
Styrofoam insulation r value per inch.
This foam board insulation is available with straight or tongue and groove edges to help limit air movement.
Asbestos corrugated paper pipe insulation.
Also called styrofoam insulation this is the least expensive material.
Closed cell spray foam insulation.
It provides about r 5 per inch.
The r value for foamular xps insulation is provided from testing at two mean temperatures 40ºf and 75ºf and from two aging conditioning techniques 180 day realtime aged as mandated by astm c578 and a method of accelerated aging sometimes called long term thermal resistance lttr per can ulc s770 03.
All these have r values ranging from r 3 2 to r 3 8 per inch.
Eps has the lowest average r value of the three most common types of rigid foam insulation around r 4 per inch.
In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7.
This product typically has an r value of 3 6 to 4 0 per inch of thickness.
For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch.
Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system.
It provides r values that range from 3 6 to 4 2 per inch.
For a 1 in thick 4 8 panel.
Asbestos loose packed fibers powder.
It is denser than eps and provides more r value with a rating of 5 per inch of thickness.
Asbestos lagging and paste will have a lower value.
This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses.
Choose this option for areas that need a good amount of strength and water resistance.
Some products have reinforced facing to make them sturdier.
Why spray foam insulation is so effective in meeting code requirements is that it has a higher r value per inch of product used than batts.
Closed cell spray foam has a far better r value per inch than other less effective insulations like cellulose fiberglass or even open cell foam.
The r value of.
Extruded polystyrene xps easily recognized by its blue green or pink color falls in the middle of the three types of rigid foam insulation in both cost and r value used most in walls or below grade applications recyclable and at about r 5 per inch costs around 42 per sq.
Expanded polystyrene foam eps is the cheapest and least used foam board product on the market.
Asbestos cement shingle siding.
For example a wall with 3 fiberglass batting r value of 10 8.
Thermal conductivity k 0 15.
Asbestos cement board r value.
The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13.
It also is the least expensive.
Expanded polystyrene eps eps is the insulation used most widely in insulated concrete forms and structural insulated panels sips.
