What Is The Best, Cheapest, And Most Expensive Type Of Basement Wall Insulation?

Basements & Other Rooms, Blog, Insulation & Waterproofing

A basement can be used for a number of things in the home, it can be used as a storage room, rec room, game room, and so much more. Others also try to get more out of their basements, turning them into extra rooms, workrooms, or offices. But if the basement walls are not properly insulated, it makes it uncomfortable. The short story here is that basement wall insulation can make a huge difference, but you have to choose just the right one for your basement.

To help you out, this guide will highlight three of the most common types of basement insulation materials, while also including their pros and cons.

Types of basement wall insulation

The 3 most common types of basement wall insulation materials are Spray foam, foam board, and fiberglass.

1. Spray foam insulation

spray foam basement insulation

Spray foam insulation acts as an air barrier that seals every hole, nook, and cranny in the basement. This will help stop or reduce the transfer of air between the basement and the surrounding environment.

Advantages of using spray foam insulation

  • Doesn’t retain water (making it mold-resistant)
  • Very effective for reducing draft near the floorboard
  • Most brands of spray foam insulation have great sound-dampening qualities to keep the noise in the basement from disturbing the rest of the home
  • Extremely durable (can last up to 80 years)

Disadvantages of spray foam basement insulation

  • Spray foam wall insulation is a very expensive option
  • Has to be done by a professional (if the material is not installed properly, you may experience air leakage later on)

2. Foam board insulation

Foam board basement insulation

Foam board insulation, also referred to as rigid foam insulation, is a durable insulation material used to add thermal resistance to a building wall. This material is made from either polystyrene, polyisocyanurate (polyisio foam), or polyurethane.

Advantages of using foam board insulation

  • Can help reduce moisture buildup and mildew growth
  • It can be used on almost any part of the home
  • Some foam board materials do not need to be maintained or replaced over time
  • Rigid foam insulation is eco-friendly

Disadvantages of using foam board insulation

  • If not done properly, the insulation will not prevent airflow
  • They damage easily if not handled properly
  • They do not last as long as other types of basement insulation
  • It is not fire-resistant

3. Fiberglass basement insulation

Fiberglass basement insulation

Fiberglass insulation consists of plastic that is reinforced with fine glass fibers. It works to trap air and limit the transfer of heat between the basement and the surrounding environment.

Advantages of using fiberglass insulation

  • Fiberglass is an inexpensive option when compared to all the other types of basement wall insulation
  • Flexible (available in pre-cut panels, rolls, and even loose-fit)
  • Poses little or no fire hazard
  • Can reduce the noise coming from the basement
  • Eco-friendly

Disadvantages of using fiberglass insulation

  • Prone to mold and moisture issues because it holds condensation
  • Fiberglass can release particles into the air if tampered with, and if these particles are inhaled can lead to soreness in the nose and throat


How thick should basement wall insulation be?

For basement walls, 2 inches or more is usually recommended for the thickness.

What is the cheapest type of insulation for basement walls?

Regarding price, fiberglass is one of the most inexpensive types of material available.

What is the most expensive type of insulation for basement walls?

Spray foam insulation is one of the most expensive types of basement wall insulation.

Choosing the best insulation material for your basement

The main purpose of insulating basement walls is not only to make sure the basement is protected from moisture or water damage but also to provide temperature control in the basement. If you are looking for an affordable option, then foam board or fiberglass would do the trick for you.

But like they say, good things don’t come cheap. If you are willing to exceed your budget for a more comfortable option, then spray foam is the way to go.

If you want to experience the benefits of a well-insulated basement, then Samkins Construction LNC is the one for you. Reach out to us today!!!

About Samkins

Samkins Construction Inc specializes in custom home building, general contracting, design-build, architectural design, construction management, and real estate services.


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