How Thick Should Insulation Be In Your Attic

This flexible insulation material is most often packaged in rolls that come in various thicknesses and standard widths usually 16 inches and 24 inches to fit between joists or studs in a house s framing.

How thick should insulation be in your attic.

They come with or without a paper or foil facing that acts as a vapor barrier. If your attic insulation is only a few inches thick or if you can see the ceiling joists you re wasting money on your heating and cooling bills. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. In a cooling climate a good blanket of attic insulation helps keep the house cooler and reduces the load on air conditioning equipment.

Different types of insulation take up different amounts of space to insulate effectively. Add insulation to attic. It is not uncommon to see 15 to 20 of insulation in a well insulated attic. Recommended insulation levels for retrofitting existing wood framed buildings.

Typical fiberglass batt insulation has an r value between 2 9 and 3 8 per inch of thickness. Batt spray and blown. However building codes only require an r 38. They range from around 1 to 3 inches in thickness and can be used in multiple applications ranging from walls to attics.

The thicker the better. Existing 3 4 inches of 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. These insulation levels will keep heated air from migrating out in winter.

There are three common attic insulation types used today. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live. In the baltimore area the u s.

Inspecting your attic insulation. Add the right kind of insulation when adding additional insulation you do not have to use the same type of insulation that currently exists in your attic. These are large rolls of insulation that are easy to cut into usable shapes. Attic insulation is measured by an r value which indicates how insulation controls the flow of heat and cold through your home.

The most common form that insulation comes in is a batt or blanket. Typically houses in warm weather states should have an r 38 insulation in the attic whereas houses in cold climates should have r 49.