Insulation is rated in R-value, with the higher the R-value the greater the resistance to the movement of heat. This is an important part of keeping heat in and/or out of a space in walls, attics, ...

All three types of high-R fiberglass are available with or without an attached vapor barrier of kraft paper. The vapor barrier has flanges on each side that make it easy to staple the insulation ...

Years ago, when few homes had insulation in their outside walls, no one worried about vapor barriers–there was no need for them. But now homes are better insulated, making it necessary to ins… ...

Homeowners often ask if a vapor barrier is necessary for optimizing attic insulation and protecting their homes from moisture-related damage. The answer, however, isn’t one-size-fits-all.

I plan to install poly-encapsulated R-19 batts into these spaces. Is it better to remove the old insulation, then install new insulation? Or can I leave the old insulation, remove the metal strips ...

Air barriers have been used in many different ways throughout the years, and they’re becoming particularly relevant as energy code requirements evolve. But many questions have surrounded the use of ...

But in some cases, water vapor builds up in tight houses until it forces its way through the inside wall surface, the vapor barrier and insulation, hitting the back of the cool sheathing, then ...

Foam is a more recent insulation option and is typically made from a low-density polymer. It boasts good insulation qualities ...

I need to add a vapor barrier and wonder about the best one. The foundation consists of granite slabs and rubble stone. It’s got small gaps in it where I see daylight.

Just tape all overlaps well so no vapor can escape into the crawl space. Once the vapor barrier is in place, you can add insulation in between the floor joists.

Since the blown-in insulation has no vapor barrier, you can either blow in another layer of insulation or you can roll out non-faced R-38 insulation over the existing insulation.

If you stuff it between the joist/rafters of a cathedral ceiling, the insulation will touch the foil. If you staple the paper vapor barrier to the underside of the joist/rafters, a gap will remain.