Roof Underlayment Options for Tulsa Homes

In this guide 12 sections

1. What Underlayment Actually Does
2. The Three Main Underlayment Options
3. Asphalt-Saturated Felt
4. Synthetic Underlayment
5. Self-Adhered Membranes (Ice-and-Water Shield)
6. Why This Matters in Oklahoma Specifically
7. What to Look for in Your Roofing Quote
8. What “Code Minimum” Looks Like in Tulsa
9. Cost Breakdown for a Typical Tulsa Roof
10. What We Install on RainTech Projects
11. Frequently Asked Questions About Roof Underlayment
12. Get a Detailed Quote

When most Tulsa homeowners think about a new roof, they think about shingles. Color, brand, warranty, hail rating. The shingles get all the attention because they’re what you see from the street.

But the layer underneath the shingles, the underlayment, is doing more work than people realize. It’s your second line of defense against water intrusion. It’s what stops a wind-driven rain event from soaking your decking.

It’s part of what keeps your roof from leaking when a few shingles inevitably get displaced over a 25-year service life. And in Oklahoma’s climate, with our wind, hail, ice events, and occasional torrential rains, underlayment matters more here than in most parts of the country.

This guide walks through roof underlayment options for Tulsa homes, what each does, what they cost, and what you should specifically look for in your roof replacement quote.

What Underlayment Actually Does

Underlayment is the waterproof or water-resistant material installed directly on top of your roof decking, before shingles go on. Its jobs:

1. Secondary water barrier if shingles are damaged or displaced
2. Protection during construction before shingles are fully installed
3. Vapor barrier to manage moisture between attic and roof
4. Smoothing layer over decking imperfections
5. Compliance with manufacturer warranty requirements (most shingle warranties require specific underlayment)

A good underlayment shouldn’t ever be tested in normal conditions: the shingles do their job and the underlayment never sees water. But when something goes wrong (a missing shingle from a windstorm, an ice dam, wind-driven rain getting under shingles in a severe storm), the underlayment is what’s standing between water and your decking, attic, and ceiling.

The Three Main Underlayment Options

In residential roofing in the Tulsa metro right now, you’ve got three main types of underlayment to choose from:

• Asphalt-saturated felt (15# or 30# felt)
• Synthetic underlayment (polypropylene-based)
• Self-adhered membranes (ice-and-water shield)

Most quality roof installations use a combination: synthetic underlayment over most of the roof, with self-adhered membrane in critical zones. Here’s the breakdown.

Asphalt-Saturated Felt

The traditional choice. Roofing felt has been around forever: black, paper-feeling material impregnated with asphalt to resist water. Available in two weights:

• 15# felt: lighter, thinner, cheaper. Older standard.
• 30# felt: heavier, more durable, more water-resistant. More common in current installs.

Pros

• Cheap: typically $30-$45 per roll covering ~400 sq ft
• Familiar to all roofers; no learning curve
• Adequate for many situations
• Manufacturer warranty compliant for most shingle products

Cons

• Tears easily: rips around fasteners, gets damaged during installation
• Wrinkles when wet: exposed felt that gets rained on can wrinkle and create lumps under shingles
• Heavy: hard to handle on roofs, especially on steep pitches
• UV degrades quickly: if exposed for more than a few days during installation, it weakens
• Limited durability: can deteriorate within 3-5 years if shingles fail and felt becomes the active barrier

Where felt still makes sense

• Lower-budget projects where the contractor knows what they’re doing
• Some manufacturer warranties still specify or accept felt
• Historical restorations where original materials matter

For most modern Tulsa roofs, felt is being phased out in favor of synthetics. We use felt occasionally on specific projects but it’s not our default anymore.

Synthetic Underlayment

The current industry standard for quality residential installations. Synthetic underlayments are made from polypropylene or polyethylene fabrics, engineered to outperform felt in nearly every way.

Major brands in the Tulsa market:

• GAF Tiger Paw / FeltBuster
• Owens Corning Deck Defense / RhinoRoof
• CertainTeed RoofRunner
• Atlas Summit 60
• GRACE Tri-Flex

Pros

• Tear-resistant: much harder to damage during installation
• Lighter: easier and safer for crews to handle
• Wrinkle-resistant: stays flat even when exposed to weather during construction
• UV-resistant: many synthetics rated for 90-180 days of UV exposure
• Better water resistance than felt
• Slip-resistant surface: reduces fall hazard for crews
• Wider rolls: fewer seams, faster installation
• Longer service life if shingles fail and synthetic becomes the active barrier

Cons

• More expensive than felt, typically $90-$160 per roll covering 1,000 sq ft (still cheap on a per-square basis)
• Slightly different installation: needs cap nails or specific fasteners
• Quality varies between brands

Why we recommend synthetic for nearly every Tulsa home

The cost difference between synthetic and felt on a typical roof is $200-$400. The performance difference is substantial. For 99% of customers, the upgrade is a no-brainer. We default to synthetic on every project unless there’s a specific reason to use felt.

Self-Adhered Membranes (Ice-and-Water Shield)

The premium underlayment, used in critical zones. Self-adhered membranes are made of rubberized asphalt with a peel-and-stick backing. When installed, the membrane bonds tightly to the decking, creating a fully waterproof seal, including around fasteners (nails passing through self-seal as they’re driven).

Major brands:

• Grace Ice & Water Shield
• GAF StormGuard / WeatherWatch
• Owens Corning WeatherLock
• CertainTeed WinterGuard

What ice-and-water shield does

• Waterproof, not just water-resistant: full barrier even under ice damming
• Self-seals around fasteners: nails pass through and the membrane re-seals
• Bonds permanently to the decking
• Handles standing water for extended periods
• Required by code in specific zones (eaves, valleys, penetrations) for most modern installations

Where it’s installed

Code requirements and best practices in the Tulsa market typically call for self-adhered membrane in:

1. Eave edges: the bottom 24-36 inches of every roof slope, extending at least 24 inches inside the exterior wall line. This protects against ice dam back-up.
2. Valleys: the V-shaped junctions where two roof slopes meet. Valleys concentrate water flow and are common leak points.
3. Around penetrations: chimneys, skylights, vent pipes, complex flashing situations.
4. Sidewall flashings: where the roof meets vertical walls.
5. Low-slope sections: areas under a 4:12 pitch (where shingles alone aren’t waterproof).
6. Optional but recommended: complete coverage on critical roofs (storm-prone areas, complex roof geometry).

Pros

• Best water protection available in residential roofing
• Significant peace of mind in Oklahoma’s storm climate
• Required for most manufacturer warranties in critical zones
• Adds value at resale: properly installed roofs are documented and verified

Cons

• More expensive: typically $90-$140 per roll covering ~200 sq ft
• Permanent installation: once stuck, it doesn’t come off without removing the decking
• Requires careful installation: wrinkles or improper laps create problems

How much ice-and-water shield Tulsa roofs need

A typical Tulsa-area roof installation includes ice-and-water shield in:

• Every valley
• Around every chimney, skylight, and major penetration
• The first 3-6 feet of every eave (per code)
• Sometimes the entire roof on premium installations or specific situations

For an average Tulsa home, total ice-and-water shield typically runs 8-15% of total roof area. On a 30-square (3,000 sq ft) home, that’s roughly 2,400-4,500 sq ft of membrane: about $1,000-$2,000 of materials cost in the project.

Why This Matters in Oklahoma Specifically

A few things make underlayment choices particularly relevant in our climate:

Wind-driven rain

When 60-80 mph straight-line winds drive rain horizontally during a Tulsa thunderstorm, water gets under shingles in ways that don’t happen in calmer climates. Underlayment is the thing keeping that water from soaking your decking.

Hail damage that doesn’t immediately leak

When hail bruises shingles, the damage sometimes doesn’t cause immediate leaks. The shingles still shed most water. But over the following months and years, water seeps through compromised areas and the underlayment is what stops it from going further. Quality underlayment buys you time to file claims and make repairs without secondary damage.

Ice events

Oklahoma’s occasional ice storms (the 2021 ice storm being a recent severe example) cause ice damming on eaves. Without proper ice-and-water shield, ice dams force water back under shingles and into homes. The 2021 storm produced thousands of leak claims across the metro that were preventable with proper underlayment.

Long, hot summers

Some lower-grade underlayments degrade faster in heat. Premium synthetics and self-adhered membranes handle Oklahoma summer temperatures (decking can hit 150°F) without performance loss.

What to Look for in Your Roofing Quote

When you’re evaluating roofing quotes in Tulsa, the underlayment specs should be detailed. Look for:

1. Specific underlayment product names: not just “synthetic underlayment” but the actual brand and product line.
2. Ice-and-water shield specifications: where it’ll be installed (eaves, valleys, penetrations) and how much area is covered.
3. Eave coverage extent: minimum 24" inside the exterior wall line.
4. Penetration coverage: at every chimney, skylight, vent, and significant flashing detail.
5. Manufacturer warranty compatibility: your underlayment package should match the warranty tier you’re getting.

If a quote just says “underlayment installed” with no detail, get specifics. The difference between a roof with 2,000 sq ft of ice-and-water shield in critical zones and a roof with felt and a token strip at the eaves is real, and you should know what you’re paying for.

(Our warranty guide goes deeper on how underlayment interacts with manufacturer coverage.)

What “Code Minimum” Looks Like in Tulsa

Tulsa-area municipalities (including the City of Tulsa, Broken Arrow, Owasso, Bixby, and Sand Springs) generally follow the IRC with local amendments. Current code requirements typically include:

• Synthetic or felt underlayment over the entire roof (felt 15# minimum, with 30# common; synthetic also accepted)
• Self-adhered ice-and-water shield at eaves extending 24" inside exterior wall line
• Self-adhered membrane in valleys for asphalt shingle roofs
• Drip edge at all eaves and rakes

Code minimum is the floor, not the ceiling. Quality contractors install above code as a default. If your roofer is bidding code minimum and another roofer is bidding above-code (more ice-and-water shield, premium synthetic, complete valley membrane coverage), the difference matters in Oklahoma’s climate.

Cost Breakdown for a Typical Tulsa Roof

For a 30-square (3,000 sq ft) Tulsa-area home, underlayment costs typically run:

• 15# felt + minimal ice-and-water shield: $300-$500 in materials (lowest tier)
• 30# felt + code-minimum ice-and-water shield: $500-$800
• Quality synthetic + good ice-and-water shield coverage: $900-$1,500
• Premium synthetic + extensive ice-and-water shield (or full coverage): $1,500-$3,000

The total roof project cost for the same home is typically $13,500-$17,000 for asphalt. Underlayment represents 5-15% of that depending on the package. It’s not the biggest line item, but it’s the line item with the longest-lasting consequences if cut corners are made.

For a fuller cost breakdown of a roof replacement in Tulsa, the rest of the components are itemized there.

What We Install on RainTech Projects

Our default underlayment package on residential Tulsa roofs:

• Premium synthetic underlayment across the full roof field
• Ice-and-water shield at all eaves (extending well beyond code minimum)
• Ice-and-water shield in all valleys (full coverage)
• Ice-and-water shield around all penetrations (chimneys, skylights, plumbing vents, etc.)
• Drip edge at all eaves and rakes, color-matched to shingle
• Specific products chosen to match manufacturer warranty requirements

This is itemized in every quote we provide, so you can see exactly what’s going on your roof and compare apples-to-apples with other contractors.

Frequently Asked Questions About Roof Underlayment

Is synthetic underlayment better than felt?

For most Oklahoma roofs, yes. It's lighter, much stronger, doesn't wrinkle in heat, and costs only about $200 to $400 more on a typical roof.

What is ice and water shield?

A self-adhered rubberized membrane that seals around nails. It goes in valleys, along eaves and around penetrations; see our ice and water shield guide.

How much does underlayment cost on a Tulsa roof?

Material for a typical roof runs a few hundred dollars for felt with minimal ice and water shield, up to a little over a thousand for premium synthetic with generous membrane coverage.

Get a Detailed Quote

If you’re getting roof replacement quotes and want one that itemizes underlayment in detail, so you can actually compare what you’re getting beneath the shingles, schedule a free roof inspection with our team.

We’ll walk your roof, evaluate your specific underlayment needs (some homes benefit from upgraded coverage in particular zones), and give you a quote with full transparency about what we’re installing and why.

The shingles get the attention. But in Oklahoma’s climate, the underlayment is what saves you when shingles eventually face conditions they weren’t designed for. Don’t underestimate it.

Schedule Your Free Tulsa Roof Inspection →

Sources and disclaimer. Information in this article comes from manufacturer documentation for the products named and RainTech’s own installation experience in Oklahoma. It was current as of September 24, 2026; laws, insurance rules, manufacturer terms and prices change. This article is general information, not legal, insurance, tax or financial advice.