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Your Guide to Wall Insulation

When it comes to maintaining a comfortable and energy-efficient home, wall insulation plays a huge role.

In this blog post, we’ll dive into the various types of wall insulation, the recommended R-values for Houston, and the installation processes for both new construction and existing walls.

Types of Wall Insulation

Fiberglass Batts

Fiberglass batts are the most common type of wall insulation. They are made from spun glass fibers and are available in pre-cut sizes to fit between wall studs. Fiberglass batts are affordable and easy to install, making them a popular choice for many homeowners. They provide good thermal performance and are cost-effective, but may not be as effective at reducing air leakage as other options.

Spray Foam

Spray foam insulation is applied as a liquid that expands and hardens, creating an air-tight seal. It offers excellent insulation properties and can fill even the smallest cracks and crevices. Spray foam insulation comes in two varieties: open-cell and closed-cell, each with its own benefits. Open-cell spray foam is more affordable and provides better sound insulation, while closed-cell spray foam offers better moisture resistance and higher R-values. Spray foam is highly energy-efficient but can be more expensive than other insulation types.

a EZ Attic Worker installing spray foam insulation in a new construction home
Open Cell Spray foam can be identified by its spongey appearance.

Cellulose

Cellulose insulation is made from recycled paper products treated with fire retardants. It is blown into wall cavities using specialized equipment, providing a dense and effective insulation layer. Cellulose is an eco-friendly option that offers good thermal performance and is excellent at reducing air leakage. It is also fire-resistant and can help with sound insulation. 

Rigid Foam Boards

Rigid foam boards are made from polystyrene or polyisocyanurate and are installed directly against the wall sheathing. They provide a high R-value per inch and are moisture-resistant, making them ideal for use in basements or exterior walls. Rigid foam boards are easy to install and can be used in combination with other insulation types for enhanced performance. They are also durable and can help improve the structural integrity of walls.

R-Value Requirements in Houston

The R-value is a measure of an insulation material’s resistance to heat flow. The higher the R-value, the better the insulation performance. In Houston, the recommended R-value for wall insulation is R-13 to R-15 for most homes. However, factors such as the age of your home, the type of heating and cooling system, and your personal preferences may influence the optimal R-value for your specific situation.

To determine the best R-value for your home, consider the following factors:

  • Age of your home: Older homes may have less insulation and may benefit from higher R-values.
  • Heating and cooling systems: If you have an efficient HVAC system, you may be able to use lower R-values, while less efficient systems may require higher R-values to maintain comfort and energy efficiency.
  • Personal preferences: If you prefer a warmer or cooler home, you may want to adjust your R-value accordingly.

 

R Value Equation, useful for determining insulation protective value.
The higher the R-value, the better it works at keeping heat from penetrating through.

Reach out to our team of Energy Efficient Specialist at EZ Attic Insulation and we can assess your home’s unique needs and determine the optimal R-value for your walls for FREE on your first appointment.

Wall Insulation Installation Methods

New Construction

When it comes to installing wall insulation, the approach differs between new construction and remodeling projects. For new construction, insulation is typically installed before the drywall is put up. This allows for easy access to the wall cavities and ensures a seamless installation process. Fiberglass batts, spray foam, or a combination of both are commonly used in new construction.

New construction with open walls, ideal for installing new insulation.
New Construction with bare walls are easiest for installation.

The installation process for new construction typically involves the following steps:

  1. Framing inspection: Ensure that the wall framing is complete and properly aligned before beginning insulation installation.
  2. Insulation installation: Install the chosen insulation type (fiberglass batts, spray foam, or a combination) following manufacturer guidelines and local building codes.
  3. Vapor barrier installation: If required, install a vapor barrier over the insulation to prevent moisture intrusion.
  4. Drywall installation: Once the insulation and vapor barrier are in place, the drywall can be installed to complete the wall assembly.

Remodeling with Existing Walls

In existing homes where the walls are not being removed, blow-in insulation is the most effective method. This process involves drilling small holes in the walls, usually between the studs, and using a special machine to blow insulation material (such as cellulose or fiberglass) into the wall cavities. The holes are then patched and painted over, leaving minimal evidence of the installation process.

Installing wall insulation by feeding insulation pipe through hole created in wall.
Blow-in Insulation is fed through a hole created in a wall surface.

The blow-in insulation process typically involves the following steps:

  1. Wall inspection: Assess the existing wall condition and locate studs, electrical outlets, and other obstacles.
  2. Hole drilling: Drill small holes (usually 1-2 inches in diameter) in the wall between each stud cavity.
  3. Insulation blowing: Using a special insulation blowing machine, fill each wall cavity with the chosen insulation material (cellulose or fiberglass).
  4. Hole patching: Once the insulation is in place, patch the drilled holes with drywall compound and sand smooth.
  5. Painting: Paint over the patched holes to match the existing wall color.

The Importance of Proper Installation

Proper installation is crucial for ensuring that your wall insulation performs as intended. Improper installation can lead to reduced energy efficiency, increased utility costs, and even potential health and safety hazards. Some common issues that can arise from improper installation include:

  • Gaps and voids in the insulation coverage, which can allow heat to escape and cold air to enter your home.
  • Compression of insulation materials, which reduces their effective R-value and overall performance.
  • Moisture intrusion, which can lead to mold growth and structural damage.

To avoid these issues, it is essential to work with a professional insulation contractor who follows industry best practices and local building codes. EZ Attic Insulation‘s team of experts has the knowledge, skills, and experience to ensure that your wall insulation is installed correctly for optimal performance and longevity.

Choose EZ Attic Insulation for Your Wall Insulation Needs

Don’t let poor wall insulation compromise your home’s comfort and energy performance. Contact EZ Attic Insulation today to schedule a consultation and learn how we can help you achieve a well-insulated home. Our friendly and professional team is here to answer any questions and guide you through the insulation process from start to finish.

Choose EZ Attic for Your Wall Insulation

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