How do you add foam insulation to an existing wall?

Quote from the video:
Quote from Youtube video: What we do is take a strip off about halfway up the wall. And then we drill into the cavity. And we actually place a slim-jim in the cavity feel for every single stud.

Can you use EPS for walls?

EPS is used as insulation in walls, roofs, and foundations, and serves as an integral component of structural insulated panels (SIPs), insulated concrete forms (ICFs), and exterior insulation and finish systems (EIFS).

Can you put insulation on top of drywall?

Insulating over drywall or plaster, Part One

To reduce the amount of demolition and waste InSoFast panels can be installed directly over drywall or plaster. This application using the Flat Panel 2″ or 2 1/2″ used in this configuration with 1/2″ drywall, very little interior space is lost.

How do you insulate a cold wall from the inside?

Internal wall insulation is done by fitting rigid insulation boards to the wall, or by building a stud wall filled in with insulation material such as mineral wool fibre. Internal insulation: Is generally cheaper to install than external wall insulation.

How do you insulate existing plaster walls?

To insulate your plaster walls, the contractor will blow or inject loose fill or foam insulation, and then install proper sealing and a water-resistant barrier. They may also add cladding, another layer of insulation that sits between the blown-in insulation and the outer walls.

How do you insulate an interior wall without removing drywall?

Injection foam insulation is the answer to insulating walls without removing drywall. There are several types of injection foam available out there, including the RetroFoam product we use. These materials don’t require the drywall in your home to be taken down.

How long does EPS insulation last?


EPS is a durable, rot proof and permanent material when specified and installed correctly. It will remain effective for the life of any application with no deficiency effects to be expected over a 100-year life cycle.

Is EPS insulation any good?

EPS is an extremely durable material

Expanded polystyrene will last the lifetime of any building where it’s installed. The thermal performance of EPS does not degrade over time, meaning the U-value you first achieve with EPS will not change.

Is EPS insulation good?

EPS is made of 98% trapped air and only 2% plastic, making it an efficient insulator with a small amount of raw material.

Can I use polystyrene for internal wall insulation?

You could insulate your interior walls in two basic ways. Your first option is using rigid insulation boards, such as polystyrene or PIR boards you could find at Insulation Shop, including Jablite Polystyrene Insulation Board, Celotex or Kingspan PIR Boards and much more.

Why are my internal walls so cold?

Simply put, cold walls are caused by poor insulation. If your home is poorly insulated, it means that heat from inside the home is easily escaping to the outside. Warm air moves from inside the rooms, passing through the walls to be lost outside. Without insulation, there’s no barrier to keep the heat in.

Is internal wall insulation worth it?

As much as 35% of heat loss occurs through insufficiently insulated walls. Therefore installing a thermal layer inside the home can significantly reduce your energy bills. It will improve ventilation and reduce condensation and working with the right experts mean you can make it hassle free.

How do you install rigid foam insulation on interior walls?

How to Install Rigid Foam Insulation Between Studs

  1. Measure the Project Area. Measure the entire wall area to figure out the amount of rigid foam to purchase. …
  2. Measure Individual Cavities. Measure each bay individually. …
  3. Mark and Cut the Rigid Foam. …
  4. Install the Rigid Foam Insulation. …
  5. Seal the Gaps in the Insulation.

How do you install insulation boards?

Quote from the video:
Quote from Youtube video: And in talking with David he mentioned that the most important thing with this insulation is to make sure that it's continuous with no gaps or space in between where the insulation joins up.

What kind of insulation should I use for interior walls?

Because they have a high R-value and can be used nearly anywhere in your home, foam board insulation is one of the most common types of insulation. Best for floors, foundation and basement walls, interior and exterior wall sheathing and low-sloped ceilings.

Do you need vapor barrier on interior walls?

Normally interior walls do not require a vapor barrier, but there are some situations where it is highly recommended. Interior bathroom and kitchen walls, for example, are areas where there is great benefit to installing a vapor barrier. Bathrooms and kitchens produce an enormous amount of water vapor daily.

What is a good R-Value for interior walls?

Depending on the insulation properties of the existing wall, in general the R-values of the renovated walls can be between R-19 and R-22 (0.25 to 0.30 W / m² K) – without additional risk to the structure.

Can you over insulate a house?

It is possible to over-insulate your house so much that it can’t breathe. The whole point of home insulation is to tightly seal your home’s interior. But if it becomes too tightly sealed with too many layers of insulation, moisture can get trapped inside those layers. That’s when mold starts to grow.

What is the R-value of 2 inch foam board?

With an R-value of 13.1 for a 2″ thick sheet only two 2″ sheets are required to achieve R-25. 2. Extruded polystyrene or XPS (foam is usually pink or blue) XPS has an R-value of 5 per inch of thickness requiring 5″ of insulation to achieve R-25.