Table of Contents
New England’s weather takes a toll on your home’s exterior. An extra weatherproof barrier can bring many benefits to your home, especially during New England’s wet and soggy seasons. That’s why house wrap for vinyl siding is an important component of any home in our region.
At Coastal Windows & Exteriors, we always strip a home when we install vinyl siding as we need to check for any rot and leaks. Whether you’re in Massachusetts, New Hampshire, or Maine, our New England homes need all the help they can get with defending against the harsh weather elements.
What is insulated vinyl siding and how does it work?
Insulated vinyl siding is a vinyl panel with rigid foam permanently bonded to the back.
How much can insulated siding lower my energy bills?
Insulated siding can improve a New England home’s air tightness by an average of 25%, directly reducing heating and cooling costs.
Whether you’re researching house wrap for vinyl siding, siding foam board, or insulated vinyl siding for your New England home, understanding these components helps you evaluate contractor quality. Products like house wrap and Progressive foam board provide excellent protection against moisture, prevent water penetration, and actually channel water away from your home — while providing a breathable barrier technology for many years.
Think of it as the evolution in water drainage, breathability & durability…It’s the exterior upgrade that you never knew you needed!
What is House Wrap for Vinyl Siding? A Simple Description
House wrap for vinyl siding is a synthetic, weather-resistant barrier that goes between your home’s sheathing and siding. It blocks bulk water and wind-driven rain from reaching the sheathing while remaining breathable enough to let interior moisture vapor escape.
Block-It house wrap serves as an additional shield to the elements — wrapping around your home to keep moisture out, including snow. It’s primarily used during the vinyl siding installation process.
This breathable house wrap allows water vapor and air to pass through while blocking water from entering your home.
House wrap is constructed from synthetic material. It’s lightweight, non-woven, and resists tears or punctures. It even self-seals around nails, meaning water will NOT infiltrate through openings.
Yes, House Wrap is your best friend! It’s got your back through and through!
What Does House Wrap for Vinyl Siding Do?
The purpose of house wrap goes beyond simple water protection. It delivers multiple layers of defense for your home. Serving as an essential layer with vinyl siding installation, it offers a myriad of protective upgrades for your home.
Think of house wrap as closing up the box. It covers the exterior of your home while being installed around windows and doors. When you add house wrap to your home, this is what you can expect in terms of performance.
- Exclusive Patented Water Channeling Technology: Directs water away from the wall assembly to the ground. Passes ASTM Drainage tests which provides premium performance.
- Highly Durable Materials: Provides 20% greater water holdout than Tyvek and also 40% stronger. This is superior weatherization for your home!
While house wrap insulation adds minimal R-value on its own, it works hand-in-hand with foam board to create a complete thermal and moisture barrier.
House Wrap Prevents Moisture Damage
The primary purpose of house wrap is to prevent wind-driven rain and moisture from penetrating and reaching the sheathing and causing internal damage to your home. It assists with maintaining a dry building structure.
Is house wrap waterproof? Technically, it’s water-resistant, not fully waterproof — it blocks bulk water penetration while remaining breathable enough to let trapped moisture vapor escape.
This is important because moisture can be incredibly dangerous and damaging to your home.
For example, moisture can deteriorate wood siding. When the wood is exposed to moisture without treatment, it can even lead to rotting wood.
As your home’s primary siding weather barrier, house wrap is the #1 defense mechanism against wind-driven rain. With house wrap beneath your siding, you will have a weatherproof and water-resistant barrier for incredible protection.
House Wrap Prevents Mold
To prevent mold on vinyl siding and the sheathing behind it, moisture control is critical. Mold is perhaps the most concerning aspect of moisture damage. Not only is it unsightly, but it is also damaging to your exterior. In the worst-case scenarios, it can lead to health issues.
House wrap prevents mold by ensuring that moisture can’t reach the exterior. Moisture is one of the key elements that mold needs to grow and flourish. When paired with mold resistant siding like James Hardie fiber cement or quality vinyl, house wrap creates a complete moisture defense system.
The vapor-permeable membrane allows moisture in the home to escape, protecting your home from rot and mold.
House Wrap Reduces Drafts
Did you know that roughly 30% of your home’s energy is lost through the walls? When you’re dealing with a drafty home, it can cause your home to feel cold and uncomfortable. The protective layer of house wrap keeps drafts out and can serve as a barrier against losing energy.
Along with energy efficient siding, house wrap creates an air barrier that reduces heating and cooling costs year-round. This air barrier helps reduce your heating & cooling costs!
Homeowners evaluating energy efficient siding options should always factor in the house wrap and foam board components — not just the siding material itself.
Is House Wrap Necessary?
Yes, house wrap is necessary for vinyl siding installation. Vinyl panels are not watertight on their own — house wrap provides the critical moisture barrier that protects your sheathing from wind-driven rain, ice, and snow.
When choosing the best house wrap for vinyl siding in New England, look for products like Block-It that offer 20% greater water holdout than Tyvek and patented water channeling technology.
The best approach is to have your house wrap installed before your new vinyl clap siding or vinyl cedar shakes. This way you can be sure that your home is receiving proper protection. As Kimberly-Clark says, Don’t just wrap your home, BLOCK it against the elements!
House wrap is necessary to prevent damage such as the following:
- Prevention from mold that results from contact with moisture. Moldy siding will break down the structure of your siding and leave the exterior exposed.
- It keeps your exterior otherwise protected if the vinyl becomes damaged. If wood is exposed to the elements, it’s subject to chipping, peeling, and rot.
- House wrap also reduces drafts and helps your family feel comfortable no matter the time of year.
- Bottom Line: It prevents the penetration of water and channels water away from your home, while providing a breathable barrier that protects your home for years to come!
That’s a wrap on what you need to know about house wrap! Next, let’s explore the benefits of siding foam board.
The RIGHT Way to Install New Siding…with Foam Back Insulation?
Insulated vinyl siding — vinyl panels with rigid foam permanently bonded to the back — is the gold standard for New England homes where energy efficiency matters. Insulated vinyl siding combines the low-maintenance appearance of vinyl with a built-in layer of foam insulation. It typically adds an R-value of up to 5 and can improve impact resistance.
In the most energy-efficient options of the vinyl exterior, Progressive foam siding is installed under the panels for moisture control and many other advantages. Foam siding is engineered to reduce heat transfer, resulting in energy savings and a durable layer against harsh impact to your siding. Unlike hollow-back panels, vinyl siding with foam backing resists dents, dampens noise, and helps maintain panel shape for decades.
With a 1-inch layer of foam siding under your vinyl, you can receive an immediate increase in R-value of 5. Meanwhile, air infiltration is blocked within the wall cavity for additional comfort. Properly installed foam siding panels also eliminate thermal bridging through wall studs.
HINT: The more insulation that fits behind your siding the higher the R-Value.
It’s the most cost-effective time to add insulation to your home’s exterior…when you reside in your home with vinyl siding…do it right the first time and enjoy the benefits for years to come.
Vinyl siding with foam back insulation ensures you will get the most from your new siding: premium appearance, improved durability & energy savings.
Here’s How Progressive Foam Board Saves Energy
What is foam board in siding installation? It’s a rigid insulation panel — typically EPS or Neopor — installed between the sheathing and siding to add R-value and eliminate thermal bridging. Quality siding foam board like Progressive Foam can add an R-value of up to 5 with just a 1-inch layer.
There may be an energy leak in your walls that is costing you money every day! Did you know that 35% of your home’s energy is lost through the wall studs?
This primarily happens when the walls are uninsulated, making it easy for energy loss via heat transfer. If 35% of your home’s walls are made up of uninsulated studs, that is like having one entire wall of your home with NO insulation!
Heat bypasses the insulation in your wall cavity and transfers through the studs, allowing energy to leak through your walls. This energy loss is known as thermal bridging, which affects New England homes in the summer as well as the winter.
Foam siding insulation is the only way to address thermal bridging — the energy loss that happens through wall studs where traditional cavity insulation can’t reach.
Here’s Where Your Walls are Losing Energy
- In the winter, heat leaks through the walls where cavity insulation settles and loses the effectiveness of keeping the home warm.
- During the summer, heat from the outdoors leaks through the studs which results in the air conditioning system working harder to keep the home cool.
Preventing energy loss is the reason why the Department of Energy recommends using foam siding with your new vinyl exterior install. With 50% to 70% of energy consumption coming from heating and cooling, homeowners can lose a significant amount of money by foregoing foam siding.
Foam Siding Protects Your Home From Moisture Damage And Your Health & Comfort
Choosing the best insulation under vinyl siding means finding a product that handles both moisture and energy loss — and Progressive Foam does both. A quality siding insulation board does more than add R-value — it creates a moisture management system that lets walls breathe. House wrap helps prevent moisture damage, but when coupled with foam siding they create an unstoppable force.
- Moisture Management System for your home: It’s estimated that each person uses 80-100 gallons of water per day at home. Instead of that moisture becoming trapped inside the home, foam can help it escape. Foam back siding is designed to shed water and allow walls to completely dry with a permeability rating up to 5.0, reducing the chance of mold & mildew growth in your walls.
- Prevent Against Termite Damage: Our foam siding panels are engineered with insecticide treatment that kills termites on contact. Most people don’t know they have a problem until it’s too late. Rest assured and have peace of mind as this product not only saves energy but it protects your home from future termite damage. In other leading brands, or when a home does not have any foam back protection, termites and other insects will create tunnels and damage the structure of your home. This treated foam doesn’t just repel the insects — it kills them BEFORE they can inflict any damage.
Stop Water From Getting Trapped In Your Walls
Is house wrap a vapor barrier? No — and that’s intentional. A true vapor barrier blocks moisture in both directions, while house wrap is vapor-permeable, letting interior moisture escape while blocking exterior water. When people ask about a siding vapor barrier, they often mean a vapor-permeable weather-resistant barrier like Block-It — not a true vapor-impermeable barrier, which would trap moisture.
Moisture cannot remain inside your home for several reasons. These reasons are vital to your health as well as the overall condition of your home. Adding insulation to your home reduces energy loss, but it can also create moisture problems — so make sure water vapors don’t get trapped in your walls.
Why Worry About Built-Up Moisture in Your Walls?
- Built-up moisture inside the home can lead to mildew and mold growth. In the worst cases, black mold can form which is incredibly compromising to your health.
- If the moisture problem is neglected, the structure of the home can suffer. This is because moisture damage leads to wood rot in the home’s frame.
- Choose a foam with Stay Dry technology (5x more breathable than other products) that actually releases water vapor to the outside of your home where it belongs.
Luckily, this moisture buildup is manageable with foam siding. Foam siding serves as a Type 5 water vapor by the American Society of Testing and Materials perm rating system. A perm rating of 1 is a significant vapor barrier with no breathability. Breathable foam is necessary to release interior moisture.
With a perm rating of 5, homeowners can count on our siding foam board to serve as a waterproof barrier that insulates and protects your home from moisture damage. Think of the foam siding as Gore-Tex in athletic apparel in hiking shoes, but made for your home.
Furthermore, while mother nature threatens our home with downpours and moisture from humidity, foam siding is there for your home’s protection.
Get The Best Appearance & Noise Protection
Vinyl siding with foam backing delivers more than just energy efficiency — it transforms the look, feel, and sound of your home. When you install foam back siding it not only provides energy-efficiency to your home with thermal bridging, and protects your home from water damage, it provides additional support to the siding panel giving your home the look and feel of real wood (wood vs vinyl siding) and eliminates waving, sagging and warping.
It helps maintain the shape over time and protects from impact damage. Gives your home that curb appeal you dream of! Check out the video below to see how strong it is!
Added Comfort…With this new energy-saving blanket to your home you can enjoy more consistent indoor temperatures from room to room. No more saying, why is this room so cold?
Also reduce sound transmission by up to 39% making your home more quiet and comfortable.
Enjoy Weather Barrier Protection with Your James Hardie Siding Upgrade
House wrap isn’t just for vinyl siding. James Hardie® fiber cement siding also requires a weather-resistant barrier (WRB) for warranty compliance. As a James Hardie® Elite Preferred contractor, Coastal follows every specification.
James Hardie® requires a weather-resistant barrier that meets ASTM E2556 and ICC-ES AC38 standards. HardieWrap — or an approved equivalent like Block-It — provides this protection behind every fiber cement installation.
Every James Hardie® Elite Preferred installation by Coastal Windows & Exteriors includes:
- Proper WRB installed before siding panels go up
- Flashing at all windows, doors, and penetrations
- Correct fastener placement to maintain moisture integrity
- Minimum 6-inch clearance from grade and 2-inch clearance from roofing
When you choose a James Hardie® Elite Preferred contractor like Coastal Windows & Exteriors, you’ll enjoy protection from manufacturer-approved installation from house wrap to final trim.
Moisture-Proof Your Home with House Wrap for Vinyl Siding & Progressive Foam Siding
Secure your home’s future against New England’s harsh elements by installing a complete weather defense system. When you combine high-quality house wrap for vinyl siding with foam siding, you create an unstoppable moisture and thermal barrier that provides:
- Superior protection from wind-driven rain, mold, and wood rot.
- Reduced energy loss by preventing drafts and thermal bridging.
- Enhanced durability, noise reduction, and protection from termites.
Ready to invest in long-term protection, comfort, and energy savings? Contact Coastal Windows & Exteriors today for a fast, free, and friendly estimate!
Frequently Asked Questions About House Wrap for Vinyl Siding
Does siding help insulate a house?
The right siding does help insulate a house in New England. This is especially true of foam-back options with built-in rigid insulation, installed by Coastal Windows & Exteriors.
What Types of Insulated Siding Panels Are Available and Which Is Best for My Home?
Foam-backed vinyl and fiber cement installed over foam board are the two leading insulated siding panels for New England homes.
How Much Does Insulated Vinyl Siding Cost to Install?
The average cost of vinyl siding in the U.S. is $18,000, with insulated vinyl siding priced at the higher end of that range. Keep in mind there are variables such as the size of your home will affect the final cost.
What Is the Most Energy Efficient Siding for a Massachusetts Home?
Foam-back insulated vinyl siding delivers the highest R-value and is the most energy efficient siding option for Massachusetts homes.
What Is Foam Backed Vinyl Siding and Is It Worth the Upgrade?
Foam backed vinyl siding is a vinyl panel with rigid foam permanently bonded to the back of each panel for added insulation.
How Do I Find a Qualified Insulated Vinyl Siding Installer Near Me?
Start by looking for an insulated vinyl siding installer like Coastal Windows & Exteriors! Reputable contractors have credentials such as verified manufacturer certifications, strong Google reviews, and a clear workmanship warranty.
What Questions Should I Ask Before Hiring an Insulated Vinyl Siding Installer?
Ask every insulated vinyl siding installer about certifications, installation method, house wrap choice, and warranty coverage before signing a contract.
Does Wood Rot Under Vinyl Siding?
Wood can rot under vinyl siding when moisture gets trapped under the panels. This is most common without a proper weather-resistant barrier installed beneath the panels.
