What Type Of Insulation Should I Use For Exterior Walls

Turn off the electricity then remove an electrical outlet cover for a view of exterior insulation.

What type of insulation should i use for exterior walls.

Some key benefits of cavity wall 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. Best for floors foundation and basement walls interior and exterior wall sheathing and low sloped ceilings. 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.

If moisture from either direction is allowed to build up within the stud or cavity walls the heat conducting moisture will cause the insulation to lose its r value and allow mould and rot to set. See the department of energy s doe ranges for recommended levels of insulation below. 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. To add soundproofing weave a continuous roll of fiberglass insulation between staggered studs using insulation designed for 2x4 walls.

Exterior walls and floors. The r value per inch for different types of insulation varies depending on the. Ground should be covered with a 6 mil polyethylene sheet. 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.

Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Check between floor joists if vented and check perimeter walls if unvented. 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. Weave loosely to fill the cavity but tightly enough so you won t have to compress the insulation when you install drywall.

Use the same insulation to insulate the garage as that used for the home s exterior walls. When you reach the end of the wall cut off the insulation. In most wall applications you will use r 13 or r 15 kraft faced fiberglass insulation rolls for these two by four stud walls. Insulate the garage s ceiling by using the recommended r.

Complete with flexifast fastener technology our insulation is flexible fast and easy to use. 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.