How To Hang Insulation In Attic

In this video this old house general contractor tom silva and host kevin o connor explain how to insulate an attic.

How to hang insulation in attic.

The higher the r value the greater the insulation performance. Use fireproof caulk to seal up cracks holes and openings around all penetrations such as pipes ducts and cables. The r value of the batt measures the thermal resistance so the higher the r value the more effectively. While wearing dust mask and gloves carry r 38 batts of unfaced fiberglass insulation into the attic.

Loose fill and blown insulation. Here s a handy chart. Then fill the box with insulation and close the hatch. The facing on kraft faced insulation is made of kraft paper with an asphalt coating that makes the paper impermeable to water vapor.

Choose fiberglass insulation batting. The insulation should be long enough to hang from the sill above the wall butting against the insulation you installed in step 2 above and extend 2 feet onto the crawlspace floor. It covers specific information on attic insulation and ceiling insulation that will assist with proper installation to meet resnet grade 1 criteria for fiberglass and mineral wool batt insulation. The grade of batting will vary depending on the wall that you re insulating.

The purpose of insulation facing. The best option is to install fiberglass batt insulation. Because it is forced through a tube and blown into space loose fill is best suited for unfinished attics and hard to reach areas. You ll want to check your local code for the insulation recommendations in your zone.

Covers topics from hatches to ventilation baffles and provides links to publications and videos for more information. Unfaced insulation adds an additional layer to attic insulation insulating the attic consists of setting insulation between the floor joists which are the ceiling joists of the room below. For this reason faced insulation is typically installed on the. Lay the batts across the ceiling joists covering the existing insulation.

After you finish blowing the insulation you ll need to build box on top of the attic access hatch to avoid any heat escaping through it. Blanket type insulation comes in two forms. The paper creates a vapor barrier that helps keep the water vapor in the warm moist heated indoor air from migrating outward into the wall or other structure. If you don t have an attic however there is no alternative but climb a ladder and do it by hand before you hang the drywall.

There are various grades of insulating batting for different locations in the house so you ll need a different insulation for interior exterior attic or basement walls. For our area r 13 batt insulation is recommended for interior walls and r 38 for attics since we need the extra shield from the extreme heat and cold coming from our attic. However you must complete an important step before installing any insulation.