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Closed Wall Cavity Insulation

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Closed Wall Cavity

Upgrading insulation in closed wall cavities can prevent convection and air leakage.

Many years ago, because of unavailable resources and technology, homes were constructed with little or no insulation in the exterior walls.

Through research, development and field testing, Reitzel Bros. Insulation uses a proven process to install cellulose fibre insulation into empty exterior wall cavities, or improve existing levels of insulation within exterior walls. .

The Problem

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Inadequate Insulation

In some homes, insulation is not adequate, or has not been installed while the home is being built. Sometimes existing insulation becomes damaged through moisture or insects and vermin. The lack of effective insulation in the closed wall cavity allows cold air to circulate between the walls and this will significantly increase your heating costs. In the hot summer months, the cost of cooling your home will also be high.

The Challenge

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How to get insulation between the walls

If you are doing a renovation and the walls are exposed, it would be easier to apply cellulose insulation using another method called Spray On. With closed wall cavity, we use a pneumatic blowing equipment, which effectively fills the closed wall cavity with loose fill cellulose fibre insulation.

The Solution

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Small Drilled Holes in Walls

Depending on the application 1” holes are drilled from the interior or exterior of the building into each cavity space, between wall studs. The cellulose fibre insulation material is blown in through these strategically placed 1" drilled holes from the interior or exterior wall depending on the application. The process uses the air from the pneumatic blowing machine to compact the insulation in the wall cavity.

The Result

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Increased Thermal Values

Thermal images are taken to measure how effective the insulation is in the closed wall cavity. The thermal image shows the difference between unfilled cavities (SP1) and the insulated cavity(SP2). Only minutes after adding the cellulose fibre insulation, there is already greater than 1° Celsius difference in temperature.