Ice & Water Shield Installation for Shingle Roofs: A Homeowner’s Guide

If you're a homeowner in Gainesville or nearby areas like Cumming, Dahlonega, or Flowery Branch, protecting your home from roof leaks starts before the first shingle goes on. One of the most critical—and often overlooked—layers of protection is the ice and water shield.

Let’s break down what it is, why it matters, and how L&L Roofing installs it the right way.

What Is Ice & Water Shield?

Ice and water shield is a self-adhering membrane installed under your shingles, typically along:

• Eaves (edges of the roof)

• Valleys (where two roof slopes meet)

• Roof penetrations (chimneys, vents, skylights)

• Low-slope areas and crickets (miniature roofs behind chimneys)

This waterproof barrier helps prevent water intrusion from ice dams, wind-driven rain, and heavy storms—especially in tricky roof areas.

Why It Matters in North Georgia

While Gainesville and North Georgia don't see blizzards like the Midwest, we do get cold snaps, heavy rain, and even hailstorms. These conditions create ideal circumstances for:

• Ice dams (frozen water at the roof edge backing up meltwater)

• Wind-blown rain working under shingles

• Leaks from flashing failures or poor underlayment coverage

As required by building code and recommended by the NRCA and ARMA, ice and water shield should extend a minimum of 24" inside the heated wall line at eaves. And underlayment in valleys, crickets, and transitions should always be a high-temp rated product to handle heat buildup.

How We Install It Right at L&L Roofing

At L&L Roofing, we treat every shingle job like it’s protecting our own family’s home. Here's our typical approach:

• At the eaves: We apply a full-width strip (36") and extend it at least 24" past the heated wall line.

• In valleys: We fully cover the valley area before any underlayment or shingles go on.

• Around chimneys, skylights, and roof-to-wall connections: We wrap and lap the membrane under flashings to ensure watertight protection.

• Along rake edges (when needed): Particularly on high-wind exposure homes, we install edge protection to prevent water from blowing under shingles.

And we always follow the manufacturer’s best practices and local code requirements.

Common Mistakes to Avoid

Plenty of leaks we’ve been called to fix could’ve been prevented with better prep work. Here are some missteps we never make:

• ❌ Skipping shield on low-slope roofs or near dormers

• ❌ Installing over wet or dirty sheathing

• ❌ Using the wrong membrane for high-temp applications

• ❌ Poor lap joints or missing edge sealing

FAQs

Do I need ice and water shield on the entire roof?
Not usually. In Gainesville, it’s typically required only at the eaves, valleys, crickets, and penetrations. However, for low-slope or complex roofs, full coverage may be smart.

What’s the difference between ice and water shield and felt paper?
Ice and water shield is waterproof and self-sealing around nails. Felt is water-resistant at best and does not seal punctures.

Can I add it to an existing roof?
Only during a tear-off and full roof replacement. It goes under the shingles, not on top.

How much does it cost?
Installed properly, it adds a few hundred dollars to a roof project—but it can save you thousands in water damage later.

Need Roof Repairs or Replacement? Let’s Talk.

Whether you’re dealing with storm damage or planning a full shingle replacement, L&L Roofing & Construction does it the right way—no shortcuts, no surprises. Call us at (770) 874-0372 to schedule a free roof assessment.

We’re proud to serve Gainesville, Buford, Dawsonville, and nearby towns with honesty, integrity, and faith-driven service.