A starter strip for roofing is the first row of shingles that goes at the bottom edge of your roof. It sits along the eave and drip edge before your main shingles go on top. This strip is special because it stops water from getting under your roof and causing leaks. Without a starter strip, rain can slide up under the shingles and damage your home. Most roofers use starter strips on every roof replacement to protect the bottom edge.
Why Your Roof Needs a Starter Strip
Water is sneaky. Rain doesn’t just fall straight down. Wind pushes it sideways, and it can slide up under regular shingles if there is nothing to stop it. A starter strip has extra sticky tar on it that seals everything tight.
Think of it like a wall at the base of your roof. It catches water before it gets under the main shingles. According to industry data, improper starter strip installation is one reason roofs fail early and leak. The average roof replacement costs between $9,526 for basic work, but bad installation can lead to expensive damage later.
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What Does a Starter Strip Look Like?
A starter strip looks like a short shingle or a roll of material. It comes in different types, and all work the same way.
| Starter Strip Type | How It Works |
|---|---|
| Asphalt starter strips | Sealed with tar, attached along the eave |
| Rolled roofing | Unrolled along the edge, sealed down |
| Shingle starter strips | Look like regular shingles but extra thick |
According to RubyHome, asphalt shingles cost between $4.25 and $8.25 per square foot installed. Starter strips are part of that cost and help your shingles last longer.
How Roofers Install Starter Strips
Installation is simple but important. The starter strip goes down first, before any other shingles. Roofers nail it every 8 inches and make sure the tar side faces up.
Then they add more nails at the drip edge. The main row of shingles goes on top of the starter strip. The tar from both layers sticks together and makes a seal. According to This Old House, professional installation saves money long-term by preventing leaks and early failure.
According to RubyHome, the average roof lifespan is between 25 and 50 years, but poor starter strip installation can cut that short. A roof may last just over 19 years if the base is not sealed right.
When Do You Need a New Starter Strip?
You need a new starter strip every time you replace your roof. You cannot reuse the old one. Old starter strips are damaged and do not seal anymore. A leaking roof costs money to fix. According to industry data, 33% of homeowners report leaking as their main reason for roof replacement.
New starter strips cost only a small part of your total roof replacement. Do not skip this step to save money. It will cost way more to fix water damage later.
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Talk with a local roofing solutions to review your options and get a detailed estimate for your project.