What Type Of Insulation Should I Use For Exterior Walls

Exterior walls and floors.

What type of insulation should i use for exterior walls.

Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. 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. Because they have a high r value and can be used nearly anywhere in your home foam boards are one of the most common types of insulation. While there are additional considerations such as venting and moisture problems to take into account when you insulate under floors the united states department of energy recommends an r 25 rating in cold climates and an r 11 in warmer parts of the country.

See the department of energy s doe ranges for recommended levels of insulation below. In most wall applications you will use r 13 or r 15 kraft faced fiberglass insulation rolls for these two by four stud walls. The r value per inch for different types of insulation varies depending on the. Ground should be covered with a 6 mil polyethylene sheet.

If the walls and ceiling are closed in consider using loose fill insulation as this form of insulation uses a machine to get the insulation where it needs to go through a hole in the sheetrock. When you reach the end of the wall cut off the insulation. Complete with flexifast fastener technology our insulation is flexible fast and easy to use. Some key benefits of cavity wall 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. Use the same insulation to insulate the garage as that used for the home s exterior walls. Foam board or insulating boards are rigid panels of insulation that have a high r value. Weave loosely to fill the cavity but tightly enough so you won t have to compress the insulation when you install drywall.

Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. To add soundproofing weave a continuous roll of fiberglass insulation between staggered studs using insulation designed for 2x4 walls. Insulate the garage s ceiling by using the recommended r. Best for floors foundation and basement walls interior and exterior wall sheathing and low sloped ceilings.

Vapour barriers help control the amount of moisture that passes through insulation and are commonly used when framing the exterior walls of a house. Check between floor joists if vented and check perimeter walls if unvented.