Upgrade re-siding projects to stop thermal bridging

| by Laura Dwyer
Upgrade re-siding projects to stop thermal bridging

If you're considering a deep green remodeling or renovation of an existing home, be sure to include continuous insulation in your plan.

It will likely require removing the exterior cladding – homes with vinyl or fiber cement siding or wood paneling are good candidates for removal.

Even if you're considering a major upgrade to the wall insulation, such as spray foam or high performance fiberglass, glass wool, cellulose or other type, your home may not be as efficient as you'd like.

Only in the past few years have building codes added continuous insulation into the mix.  Wooden studs account for up to 25 percent of every wall. The heat loss through the studs is the equivalent of having an entire side of the house completely uninsulated. That’s like keeping your windows and doors open with the heater or the air conditioner on.

Once you remove the cladding, work with a qualified building professional to install continuous insulation like DuPont Tyvek® ThermaWrapTM R5.0, which adds a layer of R-5 insulation to the outside of the home.

The addition of Tyvek® ThermaWrapTM R5.0 can significantly reduce a retrofitted home’s HERS rating, which is based on a home's insulation, air tightness and other factors. Older homes often lack air barriers and other air sealing methods that are required by today’s building codes. Not only does Tyvek® ThermaWrapTM R5.0 provide a continuous R-5.0 value to the exterior of the home, it also serves as an air barrier which can help to further reduce energy usage.

A study to determine Tyvek® ThermaWrapTM R5.0 effect on energy performance under real-world conditions (after retrofitting existing single-family homes) observed that, in every case, after the material was installed, less home heating fuel was used

Read more about continuous insulation.

Topics: Insulation, Thermal Envelope

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