What Insulation For Vaulted Ceiling

I m a homeowner in seattle.

What insulation for vaulted ceiling.

Ceiling insulation typical ceiling insulation involves spreading either loose fill or batt the term commonly used for blanket insulation within the attic or airspace of a home. Install vaulted ceiling insulation with batts. If space allows the easiest is to install firm insulation batts over the rafters. Check the joists and wall plates for any holes or openings.

In a vaulted ceiling however the only fresh air route lies between the insulation and the underside of the roof deck. To keep fiberglass batts from blocking airflow rafter baffles should be. Inexplicably some well built vaulted ceilings complete with vents and fiberglass insulation have moisture problems. Seal all ceiling openings.

Cathedral ceilings were once popular due to their grandiose height and appearance but these days many people avoid it because it is difficult to get proper cathedral ceiling insulation installed. Straight bays 2x12 24 o c. Stand on a ladder and using a caulk gun seal any areas where there is visible wiring or plumbing. Foam board insulation would be a more economical especially if you are supplying the labor see photo.

There are a few different options for installing insulation in a vaulted ceiling. Bernice from midland ontario wants to know how to get more insulation into her vaulted or cathedral ceiling the common problem with structures like this that we call compact roofs is that there is not usually enough space for a lot of insulation and a lot of ventilation. Although many view this as a new method as stated previously many contractors have been doing this for years. But it s not a diy project.

The current plan is to use batts of some kind in the bays take care to air seal the interior surface avoid penetrations air seal the vent channel too bays fully sealed double prime the inside surface for vapor resistance. The drywall becomes stained the insulation becomes damp and the roof wood can even begin to rot. In most cases however insulation will not help prevent moisture. Have a newly framed vented cathedral ceiling to insulate.

In fact when the only space you have is that left by a 2x8 or even a 2x10 you really can t do a perfect job of both. Remember that a two inch breathing space between the insulation and the roof sheathing must be included to allow for ventilation. Foil faced iso board can be cost effective insulation for finished attics and cathedral ceilings. Utilizing cellulose insulation contractors blow the cathedral ceiling cavity completely full and do away with the need for outside ventilation.

A vaulted ceiling does not necessarily require roof insulation because there is an air cavity separating the interior of the home or conditioned space from the roofline. Foam insulation is an excellent although expensive solution.