Aviation Snips

What Are Aviation Snips and Why Are They Important in Roofing and Exterior Metal Work?

Aviation snips are specialized hand tools designed to cut sheet metal, flashing, gutters, drip edge, and other thin metal materials used in roofing and exterior remodeling. Also known as compound snips, these tools provide increased cutting power and control compared to standard metal shears. For homeowners investing in roof replacement, siding upgrades, fascia wrapping, or gutter installation, aviation snips play a critical role in shaping and fitting the metal components that protect your home from water intrusion.

Metal flashing and trim are essential parts of a high-performing roofing and siding system. These components must be cut precisely to create tight overlaps, clean edges, and proper water-shedding transitions. Aviation snips allow contractors to make accurate cuts without damaging protective coatings or weakening the metal.

How Do Aviation Snips Work?

Aviation snips use a compound leverage mechanism that multiplies hand force, allowing installers to cut through metal with greater ease and precision. The blades are short and strong, and the handles are designed for controlled cutting.

There are three common types of aviation snips:

Left-cut snips (red handle) – Designed for cutting curves to the left.
Right-cut snips (green handle) – Designed for cutting curves to the right.
Straight-cut snips (yellow handle) – Designed for straight cuts and gentle curves.

Using the correct snip type ensures clean cuts and better control.

Why Are Aviation Snips Used in Roofing Projects?

During roof installation or repair, aviation snips are used to:

Trim metal flashing
Cut drip edge sections
Shape valley flashing
Modify step flashing pieces
Adjust ridge vent materials

Precise cutting ensures flashing fits tightly at roof transitions, helping prevent leaks.

How Do Aviation Snips Improve Waterproofing Performance?

Flashing must overlap correctly and lay flat to guide water away from vulnerable areas. Clean cuts made with aviation snips help:

Prevent gaps between flashing pieces
Maintain consistent overlap
Avoid jagged edges that interfere with sealing
Preserve corrosion-resistant coatings

Improper cuts can compromise waterproofing and shorten material lifespan.

How Are Aviation Snips Used in Siding and Trim Installation?

In siding and exterior trim work, aviation snips are used to:

Cut aluminum fascia wrap
Trim metal corner flashing
Shape window and door trim caps
Modify metal starter strips
Adjust soffit panels

Accurate trimming allows metal components to align properly with siding and trim boards.

What Materials Can Aviation Snips Cut?

Aviation snips are commonly used for:

Aluminum flashing
Galvanized steel
Thin sheet metal
Metal coil stock
Drip edge materials

They are not designed for thick structural steel but are ideal for lightweight exterior materials.

Why Is Precision Cutting So Important in Exterior Remodeling?

Exterior systems rely on tight seams and secure connections. Poorly cut metal can lead to:

Uneven flashing joints
Gaps that allow water intrusion
Sharp edges that pose safety risks
Reduced aesthetic appeal

Precision cutting ensures that flashing integrates seamlessly with shingles, siding, and trim.

When Are Aviation Snips Preferred Over Power Tools?

Aviation snips are often preferred when:

Working in tight spaces
Making small adjustments
Cutting delicate trim pieces
Avoiding sparks near roofing materials
Protecting finished surfaces from damage

They offer greater control for detailed work.

Why Professional Tool Selection Matters

Experienced contractors understand:

How to avoid bending metal during cuts
Proper overlap measurements
Safe handling techniques
Maintaining protective coatings
Ensuring clean, professional edges

Attention to detail ensures long-term durability and leak prevention.

Why Should Homeowners Care About Aviation Snips?

Although small and often unnoticed, aviation snips contribute directly to:

Proper flashing installation
Gutter system integrity
Roof edge protection
Trim durability
Overall waterproofing performance

Well-cut metal components help protect your home from costly water damage.

Why Metal Detailing Reflects Craftsmanship

Exterior remodeling success depends on precision at every step—even in small metal cuts. Contractors who use aviation snips carefully demonstrate skill, attention to detail, and commitment to durable construction practices.

In summary, aviation snips are specialized metal-cutting tools used to shape flashing, gutters, and trim—ensuring precise fits, improved waterproofing integration, and long-lasting protection for your home’s roofing and exterior systems.

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What Our Clients Are Saying

Precision General Contracting

4.5

Based on 182 reviews

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Ben DeGuzman

3 months ago

Solar system was installed in 2022, and it worked flawlessly without any problems. But last week, I called Precision Contractors to report 2 issues with my solar system. The 1st issue, the app “Enlighten” was no longer working properly and was not giving me any reports to the phone app. I tried to get the system back online myself but could not get it to connect. So I called the office and within minutes, Carly returned my call. She mentioned, that my message was forwarded to Chris, the project manager, and that he would contact me within couple hours. In less than 1 hour, Chris came over, and after explaining to him the problem, Chris was successful getting my system back online and relaying reports back to the app. Chris was incredibly knowledgable, and very patient to answer all my questions. The 2nd issue, was that the app was reporting 8 panels, but I had 12 panels installed on the roof. Chris was not able to tell me why it was reporting 8 instead of 12, but told me he would further investigate when he returned to the office. Chris returned message promptly and informed me that all 12 panels are now back online and are displaying correctly in the app. Chris, Thank you for the follow up and quick response. Super great job!

Leyla Frausto

3 months ago

Amazing customer service with great pricing. Very happy with the service!

Ernesto Alanis

3 months ago

We had panoramic sliding doors installed about 3 years ago. The threshold was rusting and we did not k ow why. Precision sent out Marty and he did a fantastic job on the repairs. We were so pleased with the job he did. Great guy.

Shane Farnsworth

3 months ago

Great company

rebecca bell

3 months ago

The team at Precision General Contracting did a fantastic job on my patio cover. They were neat, on time, and very professional. I would highly recommend them for any job.

Kevin Warneke

4 months ago

We had General Precision do a house remodel for us. They did a lot of stucco repair as well as stucco rebuild as well. They also did a Hardy Board repair to the other half of the house. When done l, they painted the whole house. It looks great!!

Justin Walker

7 months ago

Overall a great general contractor, high-quality work and excepcional service! Carly was also super helpful and responsive.

Brett Coffelt

7 months ago

I first met them at their booth from the boat races and I was interested in solar and didn’t know too much about the savings. Scheduled a meeting with Precision and they came out and quoted me a price. I work in the industry of construction so I would know if they were pulling a fast one, however all their pricing to me was fair. I knew at that moment they could be trusted. Precision then did all the heavy lifting and scheduling where I did not need to be included too much. They had a great team and were very accommodating. One thing is just make sure everyone is on the same page with design so thereare no secrets and if you want to change they are more then willing to do it if it is possible.

t Johnson

7 months ago

We recently had Precision paint the exterior of our house, replace the rain gutters, and remove a large stucco planter box. Everyone we encountered during the process was friendly and took pride in their work. In addition to enjoying the final result of the experience, we especially appreciate the availability, follow up, and follow through of our project manager Eric Martineau and the personal attention and communication from the office manager Carly Campbell.

Suzanne Murphree

7 months ago

We had Precision Solar do our 19 panels.. Tom was awesome and they did a great job..no problems and still going strong.. we get a monthly rebate from SDG&E..And that's a miracle..

Elizabeth Hunter

7 months ago

They an outstanding job installing a brand new roof on my rental property. The entire process was incredibly smooth from start to finish, and what really impressed me was how efficient their team was, whole job was completed in just two days without sacrificing quality. The workmanship is excellent, everything looks clean and professionally done, and they kept the job site organized throughout the project. As a property owner, having a contractor you can trust to get in and out quickly while still delivering fantastic results is invaluable. I truly have zero complaints and would absolutely recommend Precision General Contracting to anyone in need of roofing work. Great experience!

EmilyQuestions

7 months ago

The Precision team did full window replacements from Anlin in my home. The entire process was smooth. The install was terrific, they were in and out in a single day. The windows are gorgeous. I highly recommend them if you are in search of new windows for your home! They also did a roof relay which was also a great investment.

R R

7 months ago

We had a fantastic experience with Precision General Contracting. They installed a Trex deck, Hardie siding, and Belgard pavers at our home in Lakeside and everything turned out great. The craftsmanship and attention to detail really show in the finished project. Our production manager, Eric, was fantastic throughout the entire process. He was professional, communicative, and made sure everything stayed on track. Carly in the office was also amazing—super helpful, organized, and always quick to respond whenever we had questions. Overall we’re extremely happy with how everything turned out and would absolutely recommend Precision General Contracting to anyone looking for quality work and a professional team.

Warren Smith

7 months ago

Precision General Contracting did a phenomenal job for us. We had a very complex wall/fence that was a challenge since there was such an elevation difference between us and our neighbors. The firm handled those complexities exceptionally well and we couldn’t be happier with the outcome. Their workers were always professional, friendly and talented! Will use Precision General Contracting again for sure!

Colette Cloonan

7 months ago

Precision General contracting did an amazing job with a very unique plan we had for a large backyard deck and cement patio beneath it. This was a challenging job due to the slope in our yard and access to the yard. Precision General got the job done! They consistently communicated with us throughout the project and any time we had questions they responded immediately. Most importantly they showed up every day! They did an amazing job and we now have a beautiful deck and patio we enjoy everyday! We thoroughly enjoyed working with Precision General and highly recommend them for any construction job you may have!

Jeremy Spencer

7 months ago

I hired Precision to take on my roof repair, add solar and batteries in Encinitas, CA, based on a coworker recommendation. They were fantastic from the quoting process, answering all my questions, were reasonably well-priced, and offered financing via Wheelhouse Credit Union.The roofing and installation was fast and great communication throughout. I had some follow-up questions and needed some minor support, but they were so friendly and responsive each time. I highly recommend this company.