Synthetic vs. Felt Roofing Underlayment

Selecting the right roofing underlayment is crucial for your home’s protection against water damage. Two popular options for this part of the roof are synthetic and felt. Learn about their pros and cons in this post.

Synthetic Underlayment

Synthetic underlayment is relatively new. Made from polypropylene, polyester, or fiberglass, it is engineered to offer robust weather protection. Its standout advantages include the following:

• Durability: Synthetic underlayment is tear-resistant and can withstand extreme weather conditions. Its composition allows for a more substantial barrier against moisture, crucial for the rainy season.
• Weight and Installation: Synthetic underlayment is lighter than its felt counterpart and easier to handle and install. This can lead to shorter installation times and lower labor costs.
• Lifespan and Warranty: Synthetic underlayment offers superior UV protection and comes with better warranties for added peace of mind.

Felt Underlayment

Felt underlayment, or tar paper or roofing felt, is made from organic or fiberglass substrate, saturated in asphalt. It has been a staple in the roofing industry for decades. Its most known benefits include the following:

• Cost-Effectiveness: Generally, felt underlayment is more affordable upfront than synthetic options. It can be a cost-effective choice for those on a tight budget.
• Performance: While felt provides good water resistance, it is heavier and more prone to tearing than synthetic underlayment, especially under heavy foot traffic during installation.
• Breathability: Certain types of felt underlayment are designed to allow better ventilation, which can be beneficial in managing attic temperatures and moisture levels.

Factors to Consider When Choosing Between Synthetic and Felt Underlayment

Climate 

A mixed climate necessitates an underlayment that can cope with heavy rains and dry spells. Synthetic underlayment typically offers better overall protection against moisture, making it a suitable option for wet weather conditions.

Eco-Friendliness

Consider the environmental impact of your building materials. Synthetic underlayment is usually more durable and has a longer lifespan, which means less frequent replacements. However, felt underlayment is made from natural materials, which might appeal to those prioritizing eco-friendliness.

Budget

While synthetic underlayment might offer more advanced features and a longer lifespan, it comes at a higher initial cost. Evaluate your current financial situation and consider how an investment in synthetic underlayment could pay off in the long term.

Crown Roofing LTD can provide tailored advice, ensuring you select the best underlayment to protect your home for years. Call us today at (604) 370-6288 or complete our contact form to schedule a consultation.