How do you add insulation to an existing vaulted ceiling?

Quote from the video:
Quote from Youtube video: So again basic steps you cut an access strip in the drywall of the cathedral ceiling remove the existing insulation that's in there and then spray foam down each stud cavity to get your fill.

What R-value do I need for vaulted ceiling?

In moderate climates, insulation with R-19 or R-30 thermal values is often sufficient. In colder regions, builders install ceiling insulation with thermal values up to R-49.

What type of insulation is best for a vaulted ceiling?

Most home contractors would probably tell you that the best insulation to use for a vaulted ceiling is fiberglass insulation. The main reasons are that fiberglass is one of the most inexpensive types of insulation that you can purchase, and fiberglass batts are relatively easy to install in vaulted ceilings.

Do vaulted ceilings need to be vented?

A vaulted roof offers open living space directly below the rafters because there are no horizontal ceiling joists. Although there is no separate attic to vent, air circulation is still necessary to prevent heat from building up between the underside of the roof deck and the interior drywall finish.

How do you insulate a sloped ceiling?

Insulating Unvented Sloped Ceilings

  1. Install 7 inches of spray foam on the underside of the roof sheathing and leave the rest of the rafter cavity open.
  2. Install 4 inches of spray foam on the underside of the roof sheathing and fill the rest of the cavity with fiberglass batts.

How do you insulate a ceiling without removing the drywall?

Injection foam insulation is the answer to insulating walls without removing drywall. There are several types of injection foam available out there, including the RetroFoam product we use. These materials don’t require the drywall in your home to be taken down.

Should a vaulted ceiling be insulated?

Quote from the video:
Quote from Youtube video: If the insulation you're using is thicker than the joist space then you must install baffles over the entire length of the roof deck surface to allow for ventilation of the roof.

How do you insulate a vaulted 2×6 ceiling?

Quote from the video:
Quote from Youtube video: Put a little bit of liquid nails on the back of these spacers. And I just spaced them out like two or three feet. And then once you do that then you have your spacing.

Do cathedral ceilings need faced insulation?

As a guide, cathedral ceilings are insulated in the same way as flat ceilings. To start, if using kraft-faced fiber glass insulation, the vapor retarder should be installed toward the warm-in-winter side of the house, or facing down towards the interior of the room.

What happens if you don’t vent vaulted ceiling?

The next most important step to avoiding cathedral ceiling issues is ventilation. No matter how well insulated and constructed your home is, moisture and heat will move into the ceiling space. If that moisture does not have a way to escape, it will start to cause rot and structural damage.

Do vaulted ceilings add value?

Vaulted ceilings may add as much as 25% in value to a home in some markets, especially those with older or smaller houses. In higher-end houses, however, vaulted ceilings are an expected feature. As a result, they are unlikely to add much additional value to the property.

Why is my vaulted ceiling sweating?

The upper walls and roof are sun-exposed, so there would have been air-heating and expansion. With only one penetration in the cathedral ceiling, that warm moist air intruded into the room, encountering cool drywall ceiling and metal fan housing, resulting in condensation.

Is a cathedral ceiling the same as a vaulted ceiling?

While a cathedral ceiling has equal sloping sides that are parallel to the actual pitch of the roof, a vaulted ceiling does not follow the roof’s pitch, with more styles to choose from.

How do you get a r38 on the ceiling?

An insulation value of R-38 is at the high end and requires a minimum thickness of 12 inches. R-value does not depend on a single layer of insulation. To achieve R-38, you can use two layers of R-19 or three layers of R-13, which give slightly higher thermal resistance.

What is the R-value of closed cell spray foam?

R-7 per inch

Closed cell spray foam has an R-value of R-7 per inch. In comparison, open cell spray foam has an R-value of R-3.8 per inch.

What spray foam has the highest R-value?

Spray Foam

The foam (usually polyurethane) is sprayed to fill cracks and gaps in the attic to form a hermetically sealed barrier. Spray foam provides the highest R-value – while open cell spray foam has about an R-value of 2.2 to 3.5 per inch, closed cell spray foam has about 6-7 per inch.

Is 2 inches of closed cell foam enough?

Closed cell spray foam should be 4- to 5- inches on the ceiling and 2- to 3-inches in the walls. This might come as a surprise to you, but honestly, this is all the spray foam it takes to get the biggest bang for your buck with the air seal and thermal resistance needed for certain areas of the home.

What is the thinnest insulation with highest R-value?

Aerogel insulation

Aerogel insulation offers the highest R-value of any insulating material at less weight and thickness—ideal for construction, refineries, pipelines, and thin-gap thermal barriers.

What insulation has highest R-value per inch?

rigid foam panels

Among insulation types, rigid foam panels have the highest R-value per inch.

What is the R-value of 2 inch blue foam?

A wall utilizing STYROFOAM T-MASS Technology with a 2-inch exterior layer and a 4-inch interior layer of concrete along with a 2-inch layer of STYROFOAM extruded polystyrene insulation would result in a material R-value of approximately 11.33.