How do you install metal drip edge?

What is Metal Drip Edge?

Metal drip edge is an L-shaped flashing that is installed along the edges of the roof. It serves several important functions:

• It creates a drip edge to direct water away from the fascia and edges of the roof
• It covers up and waterproofs the edges of the roof sheathing
• It provides a finished look along the fascia and rakes of the roof

Metal drip edge is typically made from galvanized steel or aluminum. Galvanized steel is more durable and long-lasting, while aluminum is lighter weight and easier to work with.

The most common sizes of metal drip edge are 3-4 inches wide with a 1/2 to 1 inch vertical drop. However, drip edge can be purchased in a variety of widths and sizes to fit any roof line.

Benefits of Installing Metal Drip Edge

There are several benefits to installing metal drip edge on your roof:

• Protects fascia boards from rotting – The drip edge creates a barrier so water runs off the roof instead of seeping behind the fascia and causing it to rot.
• Extends roof life – By channeling water away from rake edges and fascia, it helps prevent premature deterioration of the roof edges and structure.
• Guards against wind damage – The added reinforcement along the roof edges helps make it more resistant to damage from high winds.
• Provides a finished look – The drip edge creates a clean, finished line along the roof edges for a more attractive look.
• Less maintenance – Properly installed drip edge results in less long-term maintenance issues or repairs needed for the roof edges.

When to Install Metal Drip Edge

Metal drip edge should be one of the first things installed during new construction or re-roofing. Here is when it should be added during the roofing process:

• On new roofs, the drip edge goes on before the underlayment or any shingles.
• On re-roof jobs, install it before removing the old shingles so the rake edges are protected.
• Apply it over any existing metal flashings for proper overlap and waterproofing.

The key is to have the drip edge underneath the roofing underlayment for proper shingling. It can be installed on an existing roof, but it’s best done as part of a roof tear-off and replacement.

How to Install Metal Drip Edge

Installing metal drip edge is a relatively straightforward process, but it’s important to do it correctly. Here are the step-by-step instructions:

Materials Needed

• Metal drip edge flashing in appropriate lengths
• Roofing nails or screws
• Chalk line
• Utility knife
• Tin snips
• Caulk or sealant
• Protective eyewear and gloves

Steps for Installation

1. Measure roof rake edges and fascia perimeter.
2. Cut metal drip edge pieces to the measured lengths using tin snips.
3. Apply chalk lines along roof edges at desired overhang positions.
4. Place cut drip edge pieces over roof edges and align with chalk lines.
5. Secure drip edge by nailing or screwing at 12″ intervals along length.
6. Overlapping pieces by 2-4″, making sure water flows over joints.
7. Apply caulk or sealant along seams and nail heads for extra waterproofing if desired.
8. Install roof underlayment on top of installed drip edge.

Here are some more tips for proper installation:

• Always overlap pieces so upper pieces lay over lower pieces with the flow of water.
• Extend drip edge 1/4″ to 3/4″ below roof sheathing edge.
• Keep nails/screws at least 1/2″ from edge so not to create holes in flashing.
• Measure and cut miters at corners for a clean look.
• Double up on outside corners using short drip edge pieces for added strength.

Step-by-Step Instructions with Photos

Here is a step-by-step guide with photos to install drip edge:

1. Measure and Cut Metal Drip Edge Pieces

Use a tape measure to measure all sides of the roof that will receive drip edge. Add about 6 inches to each measurement to account for corners and overlaps. Cut the galvanized drip edge to these measurements using tin snips.

2. Snap Chalk Lines Along Fascia and Rake Edges

Snap chalk lines along the fascia and rake edges to mark where to place the upper edge of the drip edge flashing. This helps align the drip edge evenly along the roof edges.

3. Place Drip Edge Along Lines

Place sections of drip edge along the chalk lines you snapped so the top edge follows the line. The drip edge should overhang the roof sheathing slightly.

4. Nail Drip Edge Into Place

Use roofing nails to secure the drip edge into the fascia board every 12 inches along the length. Use tin snips to notch or miter corners for proper fit.

5. Overlap Pieces and Seal

Overlap pieces by 2-4 inches making sure upper pieces lay over lower pieces to flow water properly. Apply caulk or sealant along seams for extra waterproofing if desired.

6. Install Roof Underlayment

Install roofing underlayment or ice & water shield over the drip edge. The drip edge should be underneath the underlayment layers so water flows over properly.

And that’s it! Be sure to double check that all seams are overlapped correctly before starting shingle installation.

Common Mistakes to Avoid

Improper drip edge installation can defeat its purpose and lead to problems. Here are some common mistakes to avoid:

• Forgetting to overlap pieces – Any seams should be overlapped by 2-4 inches.
• Installing drip edge on top of underlayment – The underlayment layers must go over the drip edge.
• Using too few fasteners – This can allow wind to lift the drip edge so nail or screw every 12 inches.
• Not properly sealing miters and seams – Caulk or sealant prevents leaks at the seams.
• Installing in cold weather – Drip edge is harder to shape and cut when cold. Do the work when temperatures are warmer.

Taking steps to avoid these errors will lead to an effective, problem-free drip edge installation.

Cost to Install Metal Drip Edge

The cost to install metal drip edge on your roof will depend on several factors:

• Roof size and lineal footage – More roof edge means more materials needed.
• Type of metal – Galvanized steel is the most economical while copper is premium.
• Contractor vs. DIY – Hiring a roofer will add professional labor costs.
• Accessibility – A multi-story roof costs more than single story.

On average, expect to pay the following costs:

• Galvanized steel drip edge – $2-$4 per linear foot ( contractor install)
• Aluminum drip edge – $3-$5 per linear foot (contractor install)
• Copper drip edge – $10-$15 per linear foot (contractor install)

For DIY installation, the material-only costs are about $1 – $5 per foot depending on metal type.

A typical 25 square ranch-style home with 200 linear feet of drip edge would cost $400 to $800 for a contractor install. For DIY, it may cost $200 to $1,000 in materials only.

Where to Buy Metal Drip Edge

Here are some places where you can purchase metal drip edge flashing:

• Home improvement stores – Lowe’s, Home Depot, Menards, etc.
• Local roofing supply companies
• Hardware stores – Ace Hardware, True Value
• Building supply stores – 84 Lumber
• Online retailers – Amazon, eBay, Home Depot
• Direct from manufacturers – Amerimax, Royal Building Products

Be sure to specify the lineal footage needed and the preferred material when purchasing. Galvanized steel is the most common choice for residential homes. Bring measurements to the store when buying so materials can be cut to fit.

Hiring a Professional Roofer

While an ambitious DIYer can install their own drip edge, hiring a professional roofer has advantages:

• Experienced installing drip edge correctly on every job
• Have necessary lifting equipment for multi-story homes
• Access to commercial-grade installation tools and materials
• Can inspect for any underlying issues needing repair
• Equipped to install on any roof style or shape
• Can properly integrate with any existing flashings
• Backed by liability insurance and workmanship warranties

When getting bids from contractors, be sure to ask the following:

• Are they licensed, insured, and bonded?
• Can they provide referrals or examples of past work?
• Will they handle securing any permits needed?
• What is their timeline for completing the job?
• What warranties do they provide on materials and labor?

Conclusion

Installing metal drip edge is an important part of any roofing project. Following the proper techniques of measuring, cutting, aligning, and fastening the material will result in an effective water barrier. Overlapping adjoining pieces and sealing seams creates a watertight edge that protects fascia and rakes while giving a clean finish. Avoiding common mistakes like incorrect overlap or forgetting underlayment will prevent future headaches. With the right materials and process, you can install great looking, long-lasting metal drip edge.