Table of Contents
How should basements be insulated?
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.
Do I need vapor barrier in basement?
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.
How do you insulate a finished basement?
The best way to insulate the interior side of a basement wall is with foam insulation that is adhered to or sprayed directly on the concrete. Any of the following insulation materials are acceptable for this purpose: closed-cell spray polyurethane foam or either XPS, EPS, or polyisocyanurate rigid foam.
Is it worth insulating a basement?
Insulating your basement may seem like a project best suited for another day, but truthfully, insulating your basement walls can help improve comfort and reduce energy and maintenance costs to HVAC systems. It also allows for extra living space within a home, which can be invaluable.
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.
Will insulating basement make house warmer?
In cold weather, the temperature in a basement or crawlspace can be twenty to thirty degrees colder than that in the living space. Insulating the basement or crawlspace will reduce this heat loss, saving space heating energy and improving comfort by keeping the floors warmer.
Do vapor barriers cause mold?
The Problem With Vapor Barriers This can lead to significant moisture problems and mold; problems occur when walls get wet during construction or more often throughout the home’s life. The increasing complexity of wall systems also fuels the issue.
What is the difference between a vapor barrier and a moisture barrier?
These two terms essentially refer to the same thing. Moisture barriers and vapor barriers are both building materials designed to prevent water from getting past the barrier. No vapor barrier is capable of stopping all moisture from passing through.
Should a finished basement be insulated?
Insulating basement walls properly is extremely important if you want to enjoy your finished basement investment. Every year thousands of basements are finished with poor insulation details that lead to mold, mildew and moisture problems that render the newly finished space un-usable.
Why is my finished basement so cold?
Cause #1: Below-grade walls and floor Simply the fact that basements are located underground makes them inherently colder. Dirt is a very good insulator. As a result, the basement will stay cold even during the summer months.
Should you insulate your finished basement ceiling?
Basements don’t require insulation. For example, if you plan to finish your basement, it’s best to have ceiling insulation to help keep the basement warm. The most important thing to remember is that your basement should be kept dry and conditioned. This is essential to keeping it free of pests and moisture issues.
How thick should foam insulation be in a basement?
The thickness of foam insulation in basement walls will range between two to seven inches, depending on where you live and whether you use open or closed-cell spray foam insulation.
How much R value do I need in basement?
The Model Energy Code recommends R-11 insulating values for basement walls in most of the country and R-15 for the northernmost states.
Can I use regular drywall in basement?
Drywall thickness for basement walls should be ½ inch thick. You can use standard drywall if you have a dry basement, but mold and moisture-resistant options are better investments if your basement collects moisture.
Should you insulate interior walls in basement?
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.
What insulation should I use for basement walls?
There are several types of basement wall insulation, including sprayed foam, bubble foil, foam board and fiberglass. Sprayed foam insulation is a viable choice for a homeowner who is looking for a do-it-yourself option for a finished basement. The foam is applied in exactly the manner as it sounds — with spray cans.
How do you insulate a basement wall that is already framed?
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.
Does insulating basement ceiling reduce noise?
Soundproofing the basement ceiling is the best way to reduce noise transfer from the basement to the rooms above and noise from above into the basement. Sound can be airborne or impact noise. An unfinished ceiling with exposed joists does little to reduce sound transfer.
How do I keep my basement warm in the winter?
How to Keep Your Basement Warm During the Winter Have Plenty of Insulation. Seal Cracks and Gaps. Install Carpet or Use Rugs. Watch Your Thermostat. Turn On a Space Heater. Maintain the Right Humidity Level. Keep Your Furnace in Working Condition.
