Is drip edge necessary? In plain terms, drip edge is a thin strip of metal flashing installed along the edges of a roof, and it is widely considered good practice because it directs water away from the fascia and the wood underneath. Whether it is strictly required on your roof depends on local building code, the shingle manufacturer's instructions and the warranty, and those vary. Requirements vary by city and county; ask your building department or roofer.
Our crews' practice is to install drip edge on roof replacements, and this page explains why, what the trade-offs are and what to ask if a bid leaves it off. It lists no prices and makes no promise about insurance outcomes. Every code or manufacturer claim here should be confirmed with a current source.
Key takeaways
- Drip edge is metal edge flashing along the eaves and rakes. It guides water into the gutter or off the roof edge, away from the fascia, deck edge and underlayment.
- Many roofs, especially older ones, were built without it. Whether it is needed on a new roof is a question of code, manufacturer instructions and good practice.
- We cannot tell you what your local code requires. Ask your building department or roofer, and ask to see the instruction page that applies.
- Our crews' practice is to install it. That is our practice and not a statement of law.
- A bid that omits drip edge deserves a question, and "we don't usually" is not an answer by itself.
What exactly is drip edge and where does it go on a roof?
Drip edge is a shaped strip of metal, commonly aluminum or galvanized steel, that is installed along the edges of the roof. It has a profile that turns the edge of the roof down and out, creating a small gap for water to drip free of the wood below.
There are two places it goes:
- Eaves. The lower edge, where water runs off toward the gutter. Drip edge here is typically installed under the underlayment, so water that runs down the underlayment goes onto the metal and out over the gutter.
- Rakes. The sloped edges at the gable ends. Drip edge here is typically installed over the underlayment, so wind-driven rain is held back from getting under the edge.
The exact installation order, overlap and fastening depend on the profile and the manufacturer's instructions. Those details are the reason a careful crew follows a written method instead of improvising.
Why does a roof need drip edge at all?
- Protects the fascia and deck edge. Without it, water can wick back under the roof edge and reach the wood behind the gutter. Over time that can cause rot.
- Guides water into the gutter. Water that runs off the shingle edge can curl under and miss the gutter. A metal edge gives it a defined path.
- Supports the shingle edge. It gives the first row a firm, straight edge, and it helps keep the edge of the roof from sagging or curling.
- Helps block pests and wind-driven rain. At the rake in particular, it can shield the edge from wind lifting water under the shingles, and it can limit gaps where insects and small animals try to enter.
- Cleans up the look. It creates a sharp line along the roof edge.
None of this is dramatic. What drip edge does is slow an ordinary, slow kind of damage that tends to show up years later as soft fascia or stained soffits.
How do drip edge and no drip edge compare?
The table describes general tendencies. Individual roofs, shingles and installs vary.
| Topic | With drip edge | Without drip edge |
|---|---|---|
| Water at the eave | Directed over the metal into the gutter | May curl under the shingle edge and reach the fascia |
| Fascia and deck edge | Better protected | More exposed to repeated wetting |
| Rake edge | Metal edge resists wind-driven water | Shingle and underlayment edge exposed |
| Look | Clean, straight edge | Edge depends on the shingle overhang |
| Code | Many codes address it; adoption and wording vary; check your local building code | Some older houses and some jurisdictions may not require it; check your local building code |
| Manufacturer instructions | Many specify or recommend it; check the manufacturer’s installation instructions | Warranty questions can arise if instructions call for it |
| Materials | Aluminum or galvanized steel are common; finishes vary | Not applicable |
| Added cost | A modest line item relative to the whole roof; ask for it itemized | None up front; possible repair cost later |
| Common mistakes | Wrong order with the underlayment, poor overlaps, no fasteners at the right spacing | Missing edge protection |
"Modest" is a general description, not a price. We do not publish prices here.
What do code and manufacturers say?
We want to be careful here. Model building codes have in recent years included language on drip edge for shingle roofs, but whether and when a given city or county adopted that language, and with what local amendments, varies. We are not going to cite a code section, and we ask that you do not rely on a general web page for that. Requirements vary by city and county; ask your building department or roofer.
Shingle manufacturers publish installation instructions, and many address drip edge at the eaves and rakes. Some warranties are tied to following those instructions. The rules differ between manufacturers and product lines. The practical approach is to ask your roofer to show you the manufacturer's page that applies to your shingle, and to put the drip edge on the estimate as a line item.
For older homes, re-roofing practice differs from the original build. A house built before drip edge was common may not have any. That does not mean the old roof was done wrong. It means the standards changed.
Does Total Roof Protection OKC install drip edge on every replacement?
Our crews' practice is to install drip edge at the eaves and rakes on a replacement, following the shingle manufacturer's instructions for order and overlap. That is our practice, and we say so because it is a decision and not a universal law. We install it when the old roof is off and the deck edge is visible, which is also when we can see whether the fascia and deck edge have already been damaged by water.
Our owner has posted strongly about taking old felt off the deck, and in that same spirit, a full tear-off gives us a chance to see the roof edge and not just the field of the roof. That is one more reason we prefer tear-off. For how we handle old underlayment, read our synthetic underlayment vs felt comparison.
Is drip edge vs no drip edge the right call for your home?
In most cases the practical choice is not "drip edge or no drip edge," but "do I accept a bid without it?" Here is how to think about it.
- Ask what the manufacturer's instructions say for the shingle on your estimate.
- Ask what your local building department requires, and whether it will inspect the roof edge.
- Look at what you have. If you already have soft or stained fascia, drip edge is part of the fix and not an extra.
- Think about your gutters. If you have or are adding gutters, drip edge helps keep water in them. See our seamless vs sectional gutters comparison.
- Ask for the material and profile. Aluminum, galvanized and other finishes are available, and the profile should suit the roof edge.
- Make sure it is itemized. A named line item beats "includes accessories."
- If a roofer says it is not needed, ask why. A solid answer refers to the manufacturer's instructions and local requirements, not to habit.
The cost of drip edge is small compared with the cost of repairing rotted fascia, but you should still decide with the facts. Ask for it to be shown on the estimate so you can compare it.
What are the common pitfalls with drip edge vs no drip edge?
- Assuming it is not needed because the old roof did not have it. Standards and practice change.
- Assuming it is always legally required. It may be where you live, or it may not. Ask your building department.
- Accepting "accessories" as a line. Ask for drip edge by name.
- Ignoring the fascia. If the fascia is rotting, a new drip edge on top will not fix it.
- Skipping the install-order question. The order with underlayment at the eaves and rakes matters. Ask your roofer how they do it.
- Treating metal color as cosmetic. Choose a color that suits the fascia or trim, and ask about finishes.
- Not checking the gutters. The gutter and the roof edge work together. Gutters hung wrong can cause trouble, drip edge or not.
What should be in writing for drip edge vs no drip edge?
- Is drip edge on my estimate, at both the eaves and the rakes?
- What material and profile is it?
- What does the shingle manufacturer's instruction say about it?
- What does my local building department require, and will it be inspected?
- In what order do you install it with the underlayment?
- If the fascia is damaged, what happens?
Frequently asked questions
Is drip edge required by code? It depends on where you live and which code your jurisdiction has adopted. Requirements vary by city and county; ask your building department or roofer. Many manufacturers also address it in their instructions.
What happens if you do not have drip edge? Water can wick under the shingle edge and reach the fascia and deck edge, which over time can lead to rot or staining. Not every roof without drip edge fails, but it is a well-known weak point.
Can drip edge be added after the shingles are already on? Sometimes, but a clean install is easiest when the shingles are off. Adding it later may mean lifting shingle edges, which can be tricky on an older roof. Ask your roofer what is practical.
Does drip edge go over or under underlayment? Many methods put it under the underlayment at the eaves and over it at the rakes, but the exact method depends on the manufacturer's instructions and the profile. Ask your roofer, and ask to see the instruction.
Does drip edge affect my shingle warranty? It can. Some warranties are tied to following the manufacturer's installation instructions, and those may address drip edge. Read your warranty and ask your roofer to confirm.
Is drip edge considered a type of roof flashing? Drip edge is a kind of flashing, a metal edge detail. Other flashing includes step flashing at walls, valley metal and pipe boots. See our answer on what is flashing.
Will insurance pay for drip edge? Policies differ. Whether a new drip edge is included depends on your policy language and how the work is scoped. Read your policy and ask your agent. We cannot tell you what yours covers.
Want a roof edge that is done right?
We can look at your roof edge, your fascia and your gutters while we are inspecting the roof, and put the drip edge material and profile on an itemized written estimate so you can compare bids. An inspection tells you about the roof. It does not predict or replace your insurer's decision, and we will not tell you otherwise. Call Total Roof Protection OKC at 405-415-5841, or see our services, or read the question page, what is drip edge.