Adding foundation insulation during new construction is usually less expensive.
What type of insulation to use on foundation walls.
Exterior walls and floors.
Owens corning foamular 150 1 1 2 in.
I would use at least 2 inches in a warm climate and 3 or 4 inches in a cold climate.
In most wall applications you will use r 13 or r 15 kraft faced fiberglass insulation rolls for these two by four stud walls.
Foam board or rigid foam panels best for.
It is more effective to install insulation over the surface of the blocks either on the exterior or interior of the foundation walls.
The type of materials used the application method and the extent of work all affect the overall cost.
Install rigid foam rated for soil contact type ii eps type ix eps or xps vertically up against the concrete.
Placing insulation on the exterior has the added advantage of containing the thermal mass of the blocks within the conditioned space which can moderate indoor temperatures.
Turn off the electricity then remove an electrical outlet cover for a view of exterior insulation.
Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.
While rated differently these two types of insulation are close enough in thickness that they can both fit into modern two by four wall systems.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
Check garage walls and ceilings that are adjacent to conditioned spaces.
Foam board or insulating boards are rigid panels of insulation that have a high r value.
Best for floors foundation and basement walls interior and exterior wall sheathing and low sloped ceilings.
R 7 5 scored squared edge rigid foam board insulation sheathing.
Unfinished walls such as foundation walls and basement walls floors and ceilings.
Simple payback is typically in the range of 6 months for a simple do it yourself installation to 20 years for professionally installed insulation.
Whether you want to insulate a floor or an unvented.