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If you’ve recently had a new roof installed or are planning a roof replacement, you may be wondering how long it takes for asphalt shingles to seal properly. The sealing process is a key part of ensuring your asphalt shingle roofing performs the way it should, offering reliable protection against water intrusion, high winds, and extreme weather.
In this blog post, we’ll walk you through how asphalt shingles seal, what factors affect the sealing time, and what to watch for to ensure a proper bond.
What Does It Mean for Asphalt Shingles to Seal?
When asphalt shingles are installed, they don’t immediately adhere to the roof. Each shingle has a thermally activated adhesive strip, often referred to as a “sealant strip.” Once the shingles are installed, the sun's heat warms the adhesive, causing it to bond with the shingle above it.
A proper seal helps lock the shingles in place, improving wind resistance and preventing water buildup. This process is a critical part of a complete roofing system and ensures your shingles stay secure during harsh weather conditions.
How Long Does the Sealing Process Take?
In ideal conditions, asphalt shingles typically seal within a few days to a week after installation. However, the exact timeline depends on several factors:
1. Temperature and Sunlight
Warm weather is the most important factor. The sealant on asphalt shingles activates in temperatures above 70°F, which is why most roofing professionals recommend scheduling your roof replacement in the warmer months. If your new roof is installed in cooler weather or under heavy cloud cover, it may take several weeks for the shingles to seal fully.
2. Roof Slope and Orientation
South-facing roofs tend to seal more quickly because they receive more direct sunlight throughout the day. Steeper roof pitches also allow water and debris to run off more efficiently, helping shingles bond cleanly.
3. Wind and Rain Conditions
Strong winds or frequent rain right after installation can disrupt the sealing process. If the shingles lift or shift before they bond, they may need to be manually resealed. That’s why proper installation by experienced contractors is essential, especially in climates like San Antonio, TX, where harsh weather can strike at any time.
Can Shingles Be Manually Sealed?
Yes. If conditions are not ideal for thermal activation or if certain shingles are at risk of not sealing properly, roofers can apply roofing cement or sealant manually under each shingle tab. This ensures strong adhesion regardless of temperature or sunlight levels. Manual sealing is often used on roofing materials installed during the winter or on steep slopes and high-wind zones.
What Happens If Shingles Don’t Seal?
If asphalt shingles fail to seal within a reasonable time, it can lead to:
- Blow-offs during storms
- Water penetration under the shingles
- Premature aging or curling
- Reduced warranty protection
This is why it’s important to choose a reliable roofing contractor with local experience and a focus on quality service. At Cloud Roofing, we monitor every installation for sealing success and offer free inspections to ensure everything is in top condition.
Choose Cloud Roofing for a Seamless Asphalt Shingle Roofing Installation
While most asphalt shingle roofs will seal within a week in warm, sunny weather, various factors can impact this timeline. Working with a trusted San Antonio roofing company like Cloud Roofing ensures your shingle roofing is installed correctly during your roof replacement in San Antonio, TX.
Have questions about your asphalt shingles or need a free roof inspection? Contact Cloud Roofing today to get a free quote. We’re proud to provide dependable roofing services across San Antonio and the surrounding area.