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Basement Wall Insulation

When in the process of finishing a basement, basement wall insulation is one of the most important aspects of the process as a whole. Even for a house with an unconditioned basement, it is still important. Getting the lower level of your home properly insulated can save you money on heating and provide a comfortable and dry living space.

Properly insulating basement walls can provide many benefits that all homeowners will be happy with. Both techniques of insulation can save all of the finished basement renovations you may make and keep the basement waterproofed. For a newly constructed basement, adding exterior insulation on the walls will:

  • Lessen the effects of thermal bridging and lower the amount of heat loss through the foundation.
  • Damp-roof coating is protected during backfilling.
  • Protection is offered against the intrusion of moisture and mold.
  • The foundation is made part of the thermal mass of the conditioned space. This reduces swings in interior temperature.
  • The potential for condensation on basement surfaces is lessened.

For an already existing basement, adding exterior insulation is a little impractical. However, interior insulation can offer the following advantages:

  • In existing buildings, interior insulation is less expensive that exterior.
  • Almost any type of insulation can be used.
  • The possible threat of insect infestation is eliminated.

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Insulating Basement Walls: What To Consider

When considering the idea of insulating basement walls, there are a few things to consider:

  • Many different types of insulation require and fire-rated covering. This is because they release a toxic gas when they ignite.
  • Interior space is reduced by a few inches with interior insulation.
  • Interior insulation does not protect against damp-roof coating like exterior does.
  • If there is a poor amount of perimeter drainage, insulation may become saturated with moisture coming through the walls of the foundation.
  • For adequate performance, air-sealing details and vapor diffusion retarders must be superior.

Simply put, moisture control is a very important aspect for basements. They are famous for issues with humidity, water intrusion, and mold. Basement wall insulation can provide the best defense for many common basement problems.

Basement Wall Insulating Process

In the process of lower level wall insulation, there are many steps a professional contractor will follow:

  • After the walls have been prepped, foam board adhesive is applied to polystyrene panel. This then gets pressed against the wall.
  • Horizontal lines are snapped against the panels.
  • Spruce board is held against the chalk line. Holes are then drilled through the panels.
  • Spring spikes fasten the boards together.
  • Drywall is screwed into the paneling, finishing the basement walls.

If you are planning on finishing a basement, proper insulation is a must. This can help keep your finished basement a friendly and healthy place to spend time in for years to come.