Do you put drip edge on gable ends?

Gable ends are the triangular portions of wall that are formed at the end of a pitched or sloping roof. They are an important architectural detail, but one that is often overlooked when it comes to proper water drainage and moisture protection. Like any other edge of a roof, gable ends need to incorporate drip edge to help control water runoff and prevent rot and deterioration. However, the angled shape of a gable roof line creates some unique considerations when installing drip edge. In this article, we’ll look at the purpose and benefits of using drip edge on gable ends, code requirements, and best practices for proper installation.

What is drip edge?

Drip edge is an L-shaped piece of metal that is installed along roof edges, eaves, rakes, and gables. It serves several important functions:

• Creates an overhang at the roof edge to direct water runoff into the gutter system
• Covers and protects the roof sheathing and fascia board from water damage
• Finishes the roof edge for improved aesthetics
• Helps control water flow to prevent leaks, rot, and moisture infiltration

On standard roof edges, drip edge is commonly installed in two separate pieces – one on the eave edge and another on the rake edge. When it comes to gable ends, some builders will try to get away with only using drip edge on the horizontal eave edges. However, it is important to incorporate drip edge on the angled gable edge as well.

Why should you install drip edge on gable ends?

There are several important reasons to use drip edge on the sloped sides of a gable roof:

Flashing and water protection

Gable drip edges serve as flashing to cover the vulnerable end grain of the roof sheathing. Left exposed, water can seep into the wood over time. The overhanging drip edge helps divert rainwater and runoff away from these susceptible areas.

Aesthetic finish

A drip edge provides a clean, finished look along the gable trim. Without it, the end of the roof deck and fascia may be visible in an unattractive way. The drip edge provides a more refined edge.

Prevent rot and leaks

By controlling water flow off the roof, drip edge helps prevent moisture from pooling, accumulating, and infiltrating the fascia and sheathing. This helps reduce rot, leaks, interior water damage, and mold growth.

Improve shingle life

Shingles exposed to excessive moisture along their edges become more vulnerable to curling, cracking, and accelerated deterioration from the elements. A drip edge above the shingles helps protect them and extend their service life.

Meet code requirements

Most building codes require the use of drip edge at roof edges and gable ends as part of proper roof flashing installation. Skipping gable drip edge may violate code in many cases.

Installing drip edge on gable ends

Installing drip edge on a gable roof takes a few extra considerations compared to a standard single sloped roof. Here are some tips for proper installation:

Cut drip edge to length

The drip edge for the gable end will need to be cut to the precise angle and length of the roof slope. Use tin snips to cut the drip edge to size.

Allow overhang for water runoff

When installed, the bottom leg of the drip edge should extend 1/4 to 3/4 inch below the roof sheathing. This provides the necessary overhang for water to drip clear of the fascia.

Install bottom piece first

It is easiest to install the bottom section of drip edge first. Nail it into place with roofing nails every 12 inches. Overlap joints at least 3 inches.

Install top section

The top piece overlaps the bottom section by 2-3 inches. Make sure the top piece extends up and under the roofing shingles for proper water protection.

Seal with exterior caulk

Caulk along the top of the drip edge where it meets the roof sheathing for extra leak protection. Also caulk seams if needed.

Integrate with rake edge

The drip edge on the gable end should overlap the drip edge on the adjoining rake edge by 2-3 inches for proper water flow.

Extend full gable length

The drip edge should cover the full length of the gable from rake to rake for complete protection.

Gable drip edge code requirements

Most building codes require that roof edges and gables incorporate metal drip edge flashing as part of the weather-resistant barrier system. Specific code mandates may vary slightly between jurisdictions, but the key requirements include:

• Drip edge must be minimum 0.019 inch galvanized or aluminum
• Installed over the underlayment and underneath the roof covering
• Extend 1⁄4 to 3⁄4 inch past roof sheathing edge
• Overlap rake and eave drip edges minimum 2 inches
• Fastened every 4-6 inches with appropriate nails
• Drip edge required at all roof edges and gable ends

Consult your specific local building codes for applicable drip edge requirements in your area. Using a qualified roofing contractor is recommended to ensure proper code compliant installation.

Conclusion

Installing drip edge along gable roof ends is just as important as applying it to standard eaves and rakes. It provides vital protection against leaks, rot, and moisture damage for a more durable roof system. Following best practices for cutting, installing, and integrating the gable drip edge with other roof edges is key for proper water management. When in doubt, referencing local building code requirements can help ensure your roof meets regulations. With the right drip edge in place, your roof’s gable ends will stay protected from the elements.

Frequently Asked Questions

Should drip edge go over or under roof felt?

Drip edge should be installed over the roofing underlayment (felt) and beneath the first course of shingles. The roof felt provides a secondary water barrier while allowing any moisture to drain off the roof.

Does drip edge go on before or after fascia board?

Drip edge is usually installed after the fascia board. It covers the bottom edge of the roof sheathing and hangs over the fascia slightly to direct water into the gutters.

What size drip edge do I need for my roof?

A minimum 0.019 inch thick drip edge is required by most building codes. For especially long roof edges, a thicker 0.032 gauge material provides extra strength and durability.

Should I caulk under the drip edge?

Applying a small bead of exterior caulk where the top of the drip edge meets the roof deck provides additional leak protection by sealing the joint. This helps prevent water infiltration.

Can I install drip edge in cold weather?

Yes, drip edge can be installed in cold temperatures. However, the metal can become stiffer and more difficult to cut and form. Warming the material first helps improve workability.

Do you need drip edge with a metal roof?

Yes, metal roofs also require drip edge at all edges and gables. The drip edge helps control runoff from metal roof panels while providing a finished look.

How do you attach drip edge to stucco?

Use a specialty drip edge designed for stucco roofs. Attach it using screws and fender washers spaced 12 inches apart. Take care not to crack the stucco facade.

Should I use galvanized or aluminum drip edge?

Aluminum drip edge is more resistant to corrosion and often used in coastal areas with salt air exposure. Galvanized steel is OK for inland locations. Stainless steel is best for extreme conditions.

Can you install drip edge over existing shingles?

It’s best to integrate drip edge underneath the shingles. Surface mounting over existing shingles should only be done as a temporary repair until full replacement is possible.

What color drip edge should I get?

Match the drip edge color to your existing roof color for consistency. Common choices include black, brown, white, silver, and mill finish aluminum. Custom colors are also available.