What Goes Behind Vinyl Siding

Vinyl siding adds a touch of refinement to any home, but what lies beneath its exterior cladding is just as crucial. To ensure the longevity of your vinyl siding, it’s essential to have a strong and solid wall that incorporates insulation and waterproofing. In this article, we’ll delve into the key components that go behind vinyl siding, providing you with valuable insights and ideas on what to expect under your siding.

Components You’ll Find Under Vinyl Siding

When you peel back the layers, here are the elements you may encounter beneath the vinyl siding:

• Flashing
• More siding
• Vapor barriers
• Water-resistant barriers
• Materials that protect the substructures

Let’s explore each of these components in more detail.

House Wraps Under Vinyl Siding

One of the most common components found under vinyl siding is a house wrap. This lightweight, paper-like material serves as a moisture barrier, preventing water and air from infiltrating the vinyl exterior. While not entirely waterproof, a house wrap acts as an added layer of protection, reducing the risk of long-term damage caused by exposure to moisture.

Having a house wrap behind your vinyl siding is highly recommended, even if it’s not mandated by local construction rules. Cracks and seams can allow moisture and air to seep in, potentially leading to hidden damage. By adding a house wrap, you enhance the overall integrity of your home’s exterior, safeguarding the walls’ sheathing and improving insulation.

Installing a house wrap is a relatively straightforward process that significantly contributes to the performance of your siding. Ensure proper installation to maximize its benefits. For extended sunlight exposure, consider using a material like Barricade Plus to protect against UV rays. Remember, typical house wraps should be covered in vinyl promptly to prevent brittleness and decrease their protective capabilities.

Foam Board Insulation

Foam board insulation, typically made from polystyrene, is another component often found behind vinyl siding. By adding a layer of foam board, homeowners can improve energy efficiency and enhance the appearance and value of their property. Tape the seams securely to limit airflow, and depending on the foam board’s composition, it can offer an R-value of up to R-3.5.

Flashing Under Vinyl Siding

When it comes to flashing, it’s wise to install step flashing beneath vinyl siding and other types of siding such as stucco, lap cladding, or shingle siding. Flashing serves as a crucial component to redirect water away from entry points, safeguarding the house wrap and preventing potential water infiltration.

Weather-Resistive Barrier (WRB)

To ensure a flat and leveled surface, a weather-resistive barrier (WRB) is placed between the existing siding and sheathing before applying new siding. This underlayment, often made of asphalt paper, such as HardieWrap®, acts as a protective layer, preventing water from seeping into the house while allowing moisture to escape.

Vapor Barriers

Vapor retarders, like Tyvek® drain wrap, play a vital role in preventing water from seeping through the siding and down the wall. These barriers allow water to run down the siding, ensuring proper drainage and protection against moisture damage.

It’s important to note that the choice of protective components behind vinyl siding depends on your location and personal preference. By considering these options and selecting the right combination for your home, you can ensure the longevity and durability of your vinyl siding.

In conclusion, understanding what lies behind vinyl siding is crucial for homeowners. By prioritizing components such as house wraps, foam board insulation, flashing, WRBs, and vapor barriers, you can enhance the performance and lifespan of your vinyl siding. Make informed choices and protect your investment for years to come.