Energy Efficiency for Hardie Siding in Houston TX with Tyvek ThermaWrap

Energy Efficiency for Hardie Siding with Tyvek ThermaWrap

Southeast Houston TX homeowners often remove their old siding and install James Hardie Siding. This is a great decision although often overlooked is what can be done before the new HardiePlank Siding is installed to improve the efficiency of the home. Below I explain and provide some suggestions.

Your Texas home exterior walls can account for 40-70% of the heat gain and/or loss of your home. This varies depending on many factors such as the amount of sun exposure to walls, shade and the type of building materials your home was built with. Very often I notice job signs of a contractor doing a siding job and see there is no insulation with any level of R-Value-Home Wrap being installed on the home at this perfect opportunity.

The Perfect Time to Install…

Something to think about, when you have your old siding removed, this is the best time to improve the energy efficiency of your Texas home, don’t you say? I would think that the immediate answer would be yes! When you have your old siding removed, this is absolutely the perfect time to install Tyvek ThermaWrap. What this product will do for your Texas home is to push the unwanted HEAT Back Out of your home in the Texas Summertime and push the HEAT back INTO your home (prevent it from escaping) in the Texas wintertime. This in turn will save you money year round and reduce your Texas utility bills every month by having your Heat/AC unit run less now that your home is more energy efficient because the Tyvek ThermaWrap is stopping much of the heat gain/loss!

Energy Efficiency Performance under Your Hardie Siding 

Tyvek ThermaWrap is a low emissivity (Low-E), metallized weather barrier that will actually increase the effective and total R-value of any wall systems, to help improve energy efficiency in our Texas homes. DuPont™ Tyvek® ThermaWrap™ is made with a metallized, low-emission (low-e) surface that reflects solar radiation away from our Texas homes. Cold weather in Texas, this will help stop radiant heat loss from within the home. In the summer weather, Tyvek® ThermaWrap™ do the opposite by reflecting warm air back out and away from our Texas homes, to help improve air-conditioning (A/C) efficiency. In all of our Texas seasons, that can help make our homes much more comfortable, more energy efficient, and less costly to operate. No more Hot and Cold rooms and the home has more of a even temperature.

R-2 Plus Helping Block Air Infiltration and Exfiltration

ThermaWrap has the ability to help increase the effective R-value of a wall, Tyvek® ThermaWrap™ is also an excellent vapor permeable air and water barrier, like all Tyvek® materials. The low-e surface changes the dynamics of radiant heat flow across the entire wall system.

Nearly two-thirds of the total heat lost or gained is through our Texas homes occurs through radiant heat flow. Tyvek® ThermaWrap™ addresses this by helping to dramatically improve the effective R-value (resistance Value) of the wall system. This is highly effective at reducing heat gain when the weather turns hot here in southeast Texas for over 6 months. Tyvek Therma Wrap is ideal for our southeast Texas weather.

Reduce Texas Energy – Bills How It WorksImage


Radiant heat flow occurs when heat is transferred from a warmer object to a cooler one by electromagnetic waves and natural heat flow. These waves do not need to pass through air and they do not require any contact between the two materials. They simply cross empty space in exactly the same way as the heat of the sun, which
can be felt on cold days. Tyvek® ThermaWrap™ incorporates a low-e, metallic surface that changes the radiant heat flow dynamics of the entire wall system. In winter, it reflects and or pushes radiant heat back into the wall system. Texas summer time,
ThermaWrap reflects the outside solar radiation away from the wall system, to reduce unwanted heat gain into our Texas homes in southeast TX. The total overall effect is an overall total increase in the effective R-value to the entire wall system.

When installed, Tyvek® ThermaWrap™ adds an effective R-value (thermal resistance) equal to R-2 (R- Value). In Texas homes this can help reduce energy usage and costs for heating and cooling systems, year-round. This is a huge plus for southeast Texas Homeowners in the Houston, Spring The Woodlands metro area.


About Kapitan The Siding Man

I am Greg Kapitan and started in home improvements in 1982 in my hometown of Long Island, New York just outside of NYC. With over 30 years experience, my love Shelly and I now reside in The Woodlands, Texas running our own businesses providing roofing contractor services siding installation and home window replacement services to homeowners in Houston and The Woodlands TX. Be sure to check out our website at and feel free to connect with me and contact me directly at, I would love to hear from you!
This entry was posted in Energy Efficiency, Energy Star, Home Improvement, Home Siding, Houston, Houston Texas, James Hardie siding, r-Value, Radiant barrier, Siding, Texas Home Exteriors, The Woodlands Texas, Thermal Barrier, TX, Tyvek ThermaWrap, Vinyl Siding and tagged , , , , , , , , , , , , . Bookmark the permalink.

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