When it comes to protecting your home from the harsh elements, your roof does most of the heavy lifting. But did you know that shingles aren’t the only thing keeping your home safe from rain, wind, and moisture? Roofing underlayment plays an important role in adding an extra layer of defence beneath your shingles, ensuring your roof stays durable and leak-free. Many homeowners focus only on the shingles, but the underlayment is just as important.
In this article, we’ll explain what roofing underlayment is, why it’s essential, and how it helps extend the life of your roof.
What Is Roofing Underlayment?
Roofing underlayment is a protective barrier installed between your roof deck and shingles. It serves as a backup layer that helps keep water, moisture, and wind-driven rain from reaching the wooden structure of your roof.
There are 3 common types of roofing underlayment:
- Asphalt-Saturated Felt: A traditional, affordable option made of paper and asphalt.
- Synthetic Underlayment: A lightweight, more durable option made from plastic polymers.
- Rubberized Asphalt Underlayment: A waterproof option with a sticky backing for superior moisture protection.
Each type has its benefits, but synthetic and rubberized asphalt underlayments are generally more durable and water-resistant than traditional felt.
Why Roofing Underlayment Is Important?
1. Adds Extra Protection Against Water Damage
Even the best shingles aren’t completely waterproof. Wind-driven rain, melting snow, or ice dams can cause water to sneak underneath your shingles. Roofing underlayment provides an extra layer of defence to help prevent leaks, mold, and structural damage.
2. Helps Prevent Mold & Rot
Moisture buildup in your roof can lead to mold, mildew, and wood rot, which can weaken your roof structure over time. Underlayment acts as a moisture barrier, reducing the risk of water seeping into the roof deck and causing long-term damage.
3. Protects Your Roof During Installation & Repairs
Before shingles are installed, your roof deck is exposed to the elements. If a storm hits before the shingles are in place, underlayment helps shield your roof from water damage. This added protection also applies if your shingles get damaged and need repairs.
4. Improves Fire Resistance
Some roofing underlayments come with fire-resistant properties, adding another layer of protection to your home. In areas prone to wildfires or extreme heat, fire-rated underlayment can help slow down the spread of flames.
5. Improves Wind Resistance
High winds can lift or blow off shingles, exposing the roof deck to rain and debris. A strong underlayment provides an additional safeguard against wind-driven water, ensuring that even if shingles are displaced, your home remains protected.
6. Extends the Life of Your Roof
A well-installed roofing underlayment helps prevent leaks, moisture damage, and premature wear, ultimately extending the lifespan of your roof. It’s a small investment that can save you thousands of dollars in repairs down the line.
Choosing the Right Underlayment for Your Home
The type of roofing underlayment you need depends on your home’s location, climate, and roofing materials. For example:
- If you live in a rainy climate like North Van or Maple Ridge, synthetic or rubberized asphalt underlayment is a great choice for maximum moisture protection.
- If you have a steep-sloped roof, a non-slip underlayment helps improve safety during installation.
- For asphalt shingles, a high-quality synthetic underlayment is recommended for durability.
A professional roofing contractor can help you choose the best underlayment for your home and ensure it’s properly installed.
Secure Your Roof with Proper Underlayment from Amex Roofing
Roofing underlayment is a critical part of your roof’s defence system, protecting your home from moisture, mold, leaks, and wind damage. It acts as a safety net, ensuring your roof remains strong and durable, even in extreme weather conditions.
At Amex Roofing, we offer professional roof installation and repair services across the North Shore, including West and North Vancouver. If you need a roof inspection or replacement, our team is here to help.
