Should I insulate basement walls or ceiling?

In most cases, a basement with insulation installed on its exterior walls should be considered a conditioned space. Even in a house with an unconditioned basement, the basement is more connected to other living spaces than to the outside, which makes basement wall insulation preferable to ceiling insulation.

Should basement ceiling be insulated?

Yes. Faced insulation is actually recommended on basement ceilings and ceilings in general. The covering or "face" of the insulation prevents it from falling out and trickling down into the basement air. This is especially advantageous if the insulation is made of fiberglass, which can harmful if it's ingested.

Should I insulate my basement ceiling of the basement is unheated?

If your basement functions as a living space and you have heating installed down there, basement ceiling insulation ensures you won't lose heat to the rooms above. This is important because heat rises. Improper insulation guarantees a loss of the bulk of the generated heat to the spaces above.

Should I insulate the interior walls of my basement?

Walls. Basement walls should be insulated with non-water sensitive insulation that prevents interior air from contacting cold basement surfaces—the concrete structural elements and the rim joist framing.

Should you insulate basement walls below grade?

Your best bang for the dollar in this instance is to insulate the coldest part of the wall, again typically to 2-feet below grade. However, there are many instances where insulating the full wall is the best option, such as if your walls are stone, or the floor is earth or crushed stone with no vapor barrier.

How to install Ceiling Insulation in a Basement or Crawlspace

Does insulating basement walls help?

Basement Insulation. A properly insulated basement can save you money on heating and provide a dry, comfortable living space. In most cases, a basement with insulation installed on its exterior walls should be considered a conditioned space.

What is the best way to insulate a basement?

Use spray foam insulation on basement walls when the walls studs have already been installed. Spray foam is best when you need continuous insulation with no gaps to permit air infiltration. It is an excellent solution for irregular walls and for walls with many cracks, seams, and joints.

What kind of insulation is best for basement walls?

Choosing the Best Insulation for Basement Walls and Ceiling

If you are looking for a less expensive option that you can install yourself, then foam board or fiberglass will be the better options. If you want that air seal in your basement to make the space more comfortable, then spray foam is the way to go.

What insulation is best for basement ceiling?

Your best option is insulating your exposed foundation walls. Start with getting any moisture issues under control, then use water-resistant insulation like closed-cell spray foam or XPS foam board. Most homeowners opt for fiberglass, but fiberglass has the chance of trapping moisture.

Do you need a vapor barrier in a basement ceiling?

If the basement is finished and has no moisture issues, the vapor barrier is not needed. If it has moisture issues, the vapor barrier is probably a problem.

Does insulating basement ceiling reduce noise?

The most cost-effective and simple method of sound dampening in a basement is to install insulation in the floor joists (a.k.a. basement ceiling). Typically an R-factor of 19 is installed prior to basement ceiling drywall, creating a barrier that absorbs sounds between the main floor and basement.

What R value is needed for basement walls?

The Model Energy Code recommends R-11 insulating values for basement walls in most of the country and R-15 for the northernmost states.

Should I use faced or unfaced insulation in basement?

With its moisture-resistance properties, faced insulation works better for basements. However, you can install unfaced insulation on top of it for more protection.

Is R13 good for basement ceiling?

Johns Manville Series R13 Fiberglass Roll Insulation

With an R-value of 13, this product from Johns Manville is another excellent choice for insulating your basement ceiling and is also very affordable.

Do you need a vapor barrier on basement concrete wall?

Building codes usually require a vapor barrier (4 mil plastic sheeting) on exterior basement walls if the framing is attached to masonry or concrete surfaces, or if the wood framing butts up against the outer basement walls.

What is the cheapest way to insulate basement walls?

The smart and inexpensive way to insulate joist bays is to use extruded polystyrene (XPS) foam insulation panels cut to size to fit inside the bay and "glued" in with expanding foam. When the expanding foam hardens, trim away the excess and cover the foam with a piece 1/2" thick drywall to meet fire code.

Do concrete walls need insulation?

The concrete acts as a sort of bridge for your heat to get outside. We eliminate the bridge and keep heat in by adding insulation. In order to regulate the temperature of a living space, concrete needs to be insulated.

Can insulation touch basement walls?

It's not recommended that you apply fiberglass insulation directly to a concrete wall. If you must use fiberglass, there needs to be a space between the insulation and the wall. If not, the place where the insulation touches the concrete will be overtaken by mold and mildew.

Can I use r13 insulation in basement walls?

TBF closed cell foam insulation and concrete board basement wall products offer industry-leading R-13 insulation value that will reflect back 99.987% of heat back and lead to the optimal insulating of a basement area.

Does insulating a basement help with humidity?

Insulating your basement cannot reduce the humidity because it is designed to help control temperature. Insulation can help reduce humidity by keeping the air colder or reducing condensation by keeping the air warmer. However, it cannot change the moisture levels in the air.

Should I remove basement ceiling insulation?

The insulation has become infested: If the insulation in your basement has become infested with rodents, bugs, or other critters, it is important to remove it. Not only are these animals unsanitary, but insulation can become a breeding ground for them to multiply and spread throughout your house.

How thick should basement insulation be?

The recommended R level is 25. To achieve the recommended R-value level, you'll need 3.84 inches of insulation (25/6.5=3.84). Once you have determined what the appropriate R-value is for your home, you will need to decide whether you want to use open-cell or closed-cell foam insulation.