Roof Underlayment

In stock

Mid-States ASTM D-226 30 Asphalt Saturated Roof Underlayment 36 in x 72 ft, 216 sq ft

  • Coverage area216sq ft
  • Underlayment typeAsphalt-saturated felt
  • Unrolled length72ft
  • Application methodNail/Staple

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

APOC AP-26 #30 Tuff-Felt Premium Asphalt-Saturated Roof Underlayment 36 in x 72 ft, 216 sq ft

  • Coverage area216sq ft
  • Unrolled length72ft
  • Application methodNail/Staple

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

APOC Gator-Skin Synthetic Roof Underlayment 42 in x 285.8 ft, 1000 sq ft

  • Coverage area1000sq ft
  • Underlayment typeSynthetic
  • Unrolled length285.8ft
  • Application methodNail/Staple

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

G.A.P. ASTM 30 D226 Asphalt Saturated Roof Underlayment 36 in x 72 ft, 216 sq ft

  • Coverage area216sq ft
  • Underlayment typeAsphalt-saturated felt
  • Unrolled length72ft
  • Application methodNail/Staple

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

Tamko No. 30 UL ASTM Asphalt Saturated Organic Felt Roof Underlayment 36 in x 72 ft, 216 sq ft

  • Coverage area216sq ft
  • Underlayment typeAsphalt-saturated felt
  • Unrolled length72ft
  • Application methodNail/Staple

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

Owens Corning RhinoRoof U20 Synthetic Roof Underlayment 42 in x 286 ft, 1000 sq ft

  • Coverage area1000sq ft
  • Underlayment typeSynthetic
  • Unrolled length286ft
  • Application methodNail/Staple

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

Mid-State Quik-Stick Ice & Water Rubberized Asphalt Roof Underlayment 36 in x 65 ft, 195 sq ft

  • Coverage area195sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length65ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

APOC SB-1 Weather Armor 2 Square Self-Bond Rubberized Asphalt Roof Underlayment 36 in x 66.7 ft, 200 sq ft

  • Coverage area200sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length66.7ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

TAMKO Moisture Guard Ice & Rain Modified Bitumen Roof Underlayment 36 in x 64 ft, 193.5 sq ft

  • Coverage area193.5sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length64ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

Polyglass Polystick IR-Xe Self-Adhered Ice & Water Protection Shingle Roof Underlayment 36 in x 65 ft 4 in, 195 sq ft

  • Coverage area195sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length65ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

CertainTeed DryRoof SA Waterproof Rubberized Asphalt Roof Underlayment 36 in x 65 ft, 195 sq ft

  • Coverage area195sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length65ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

ABC Pro Guard 20 Synthetic Roof Underlayment 42 in x 286 ft, 1000 sq ft

  • Coverage area1000sq ft
  • Underlayment typeSynthetic
  • Unrolled length286ft
  • Application methodNail/Staple

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

Grace Vycor Select Rubberized Asphalt Roof Underlayment 36 in x 65 ft, 195 sq ft

  • Coverage area195sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length65ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

GAF FeltBuster Synthetic Roofing Felt 48 in x 250 ft, 1000 sq ft

  • Coverage area1000sq ft
  • Underlayment typeSynthetic
  • Unrolled length250ft
  • Application methodNail/Staple

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

GAF WeatherWatch Mineral-Surfaced Rubberized Asphalt Roof Underlayment 36 in x 66.7 ft, 200 sq ft

  • Coverage area200sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length66.7ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

Owens Corning WeatherLock Granulated Self-Sealing Rubberized Asphalt Roof Underlayment 36 in x 66.7 ft, 200 sq ft

  • Coverage area200sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length66.7ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

APOC Weather-Armor HT2 High Temperature Roof Underlayment 39 in x 65.67 ft, 200 sq ft

  • Coverage area200sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length65.67ft
  • Application methodNail/Staple

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

CertainTeed WinterGuard Sand Long Asphalt-Saturated Roof Underlayment 36 in x 65 ft, 195 sq ft

  • Coverage area195sq ft
  • Underlayment typeAsphalt-saturated felt
  • Unrolled length65ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

Mule-Hide Shur-Gard TU Ultra HT Polymer Modified Bitumen Roof Underlayment 39 3/8 in x 66 ft, 200 sq ft

  • Coverage area200sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length66ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

Owens Corning WeatherLock Specialty Tile & Metal Rubberized Asphalt Roof Underlayment 36 in x 71.3 ft, 214 sq ft

  • Coverage area214sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length71.3ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

Polyglass Polystick TU MAX Self-Adhered Waterproofing Roof Underlayment 39 in x 65 ft 200 sq ft

  • Coverage area200sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length65ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

Boral TileSeal HT Modified Asphalt Roof Underlayment 36 in x 72 ft, 216 sq ft

  • Coverage area216sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length72ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

Owens Corning Titanium PSU30 High-Temp Self-Adhered Roof Underlayment 36 in x 72 ft, 216 sq ft

  • Coverage area216sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length72ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

Polyglass Polystick TU P Premium Self-Adhered Waterproofing Roof Underlayment 39 in x 32 ft, 108 sq ft

  • Coverage area108sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length32ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

Polyglass Polystick MTS PLUS Premium Self-Adhered High Temp Roof Underlayment 39 in x 65.67 ft, 215 sq ft

  • Coverage area215sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length65.67ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

Polyglass Polystick TU Plus Self-Adhered Reinforced Waterproof Tile Underlayment 39 in x 65 ft, 215 sq ft

  • Coverage area215sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length65ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

GAF StormGuard Film-Surfaced Leak Barrier Rubberized Asphalt Roof Underlayment 36 in x 66.7 ft, 200 sq ft

  • Coverage area200sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length66.7ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

Polyglass Polystick XFR Rubberized Asphalt Roof Underlayment 39 in x 49 ft, 160 sq ft

  • Coverage area160sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length49ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

Tarco LeakBarrier PS200HT Ice and Water Armor Modified Bitumen Roof Underlayment 36 in x 66 ft, 200 sq ft

  • Coverage area200sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length66ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

Tarco LeakBarrier PS200MU Ice and Water Armor Rubberized Asphalt Roof Underlayment 36 in × 66 ft, 200 sq ft

  • Coverage area200sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length66ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

GAF VersaShield Fire-Resistant Roof Deck Protection 42 in x 100 ft, 350 sq ft

  • Coverage area350sq ft
  • Underlayment typeSynthetic
  • Unrolled length100ft
  • Application methodNail/Staple

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

Grace Vycor Ice & Water Shield HT Rubberized Asphalt Roof Underlayment 36 in x 75 ft, 225 sq ft

  • Coverage area225sq ft
  • Underlayment typeRubberized asphalt
  • Unrolled length75ft
  • Application methodPeel & Stick

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

In stock

Westlake Royal SwiftAnchor Synthetic Base Sheet 40 in x 300 ft, 1000 sq ft

  • Coverage area1000sq ft
  • Underlayment typeSynthetic
  • Unrolled length300ft
  • Application methodNail/Staple

Pickup on Thu, Jul 03 from Miami, FL

Delivery on Jul 09–14

  • Overview
  • Articles

Complete Roof Underlayment Guide

🎯 Bottom Line Up Front

Quality roof underlayment is essential for any roofing system, providing critical protection against water damage, extending roof lifespan, and ensuring compatibility with solar panel installations. Synthetic underlayment offers superior durability and performance compared to traditional felt.

What Is Roof Underlayment?

Roof underlayment is a water-resistant barrier installed directly onto your roof deck, beneath the primary roofing material. The primary function of the roof underlay is to ensure long-term watertightness and thereby protect the roof structure.

💧 Moisture Protection

Provides crucial secondary defense against water infiltration, preventing leaks and structural damage.

🌡️ Thermal Regulation

Contributes to energy efficiency by helping regulate temperature fluctuations in the attic space.

🔧 Installation Surface

Creates a smooth, even foundation for your roofing material, ensuring proper installation.

☀️ Weather Protection

Serves as temporary protection during construction, with some products lasting 90-180 days exposed with UV inhibitors added to the polymers.

For solar panel installations, proper underlayment is critical as mounting systems require drilling through both roofing material and underlayment.

Roof Underlayment Types Comparison

🔹 Synthetic

Material: Polypropylene/Polyethylene

Lifespan: 30-50 years

Cost: $0.30-$0.70 per sq ft

Best For: All roof types

Solar Compatible: ✅ Excellent

🔹 Felt (#15)

Material: Asphalt-saturated organic

Lifespan: 15-20 years

Cost: $0.20-$0.40 per sq ft

Best For: Budget projects

Solar Compatible: ⚠️ Limited

🔹 Felt (#30)

Material: Asphalt-saturated organic

Lifespan: 20-25 years

Cost: $0.30-$0.60 per sq ft

Best For: Standard applications

Solar Compatible: ⚠️ Limited

🔹 Self-Adhering

Material: Rubberized asphalt

Lifespan: 40-50 years

Cost: $0.50-$1.20 per sq ft

Best For: Premium/Solar installs

Solar Compatible: ✅ Ideal

🔹 Metal Roof Specific

Material: High-heat resistant

Lifespan: 30-40 years

Cost: $0.75-$1.50 per sq ft

Best For: Metal roofing only

Solar Compatible: ✅ Required

Cost Breakdown & Analysis

💰 Felt Underlayment

$0.20 - $0.60

per square foot

Most budget-friendly option

⭐ Synthetic Underlayment

$0.30 - $0.70

per square foot

Most popular choice

💎 Self-Adhering

$0.50 - $1.20

per square foot

Premium protection

Installation Cost Reality: Material costs represent only 10-20% of total project cost. Labor typically accounts for 80-90% of underlayment replacement expenses, averaging $1.60 per square foot total.

Cost Variables

  • Roof Complexity: Multiple valleys, dormers increase installation time
  • Regional Factors: Metropolitan areas command 30-40% higher rates
  • Seasonal Timing: Peak seasons may result in premium pricing
  • Material Quality: Premium products offer extended warranties

Installation Process

1️⃣ Surface Preparation

Ensure roof deck is clean, dry, and structurally sound. Address any damaged decking materials.

2️⃣ Starting at Eaves

Begin installation at the lowest point of the roof, ensuring proper water flow direction.

3️⃣ Proper Overlapping

Overlap each row by at least 6 inches to create seamless water barrier.

4️⃣ Secure Fastening

Use roofing nails every 6 inches along edges, 12 inches in center areas.

5️⃣ Penetration Sealing

Cut and seal around vents, chimneys, and other roof features with appropriate flashing.

📋 Building Code Compliance

Underlayment must meet ASTM standards: D226 (felt), D4869 (organic felt), D6757 (inorganic), and D1970 (self-adhering) for code compliance.

Solar Panel Compatibility

✅ Solar-Ready Features

  • Self-sealing around fasteners
  • High temperature resistance (240°F )
  • Extended UV exposure capability
  • Matches solar system lifespan
  • Enhanced waterproofing

⚠️ Considerations

  • Higher upfront investment required
  • Specific products needed for metal roofs
  • Professional installation recommended
  • Building code variations by region
  • Thermal expansion compatibility

For solar system installations, self-adhering underlayment provides optimal performance due to automatic sealing around mounting fasteners and superior thermal resistance.

Frequently Asked Questions

How long does roof underlayment last?

Roof underlayment typically lasts as long as the roofing material covering it. Quality synthetic products can last 30-50 years when properly installed, while felt products last 15-25 years.

Is synthetic underlayment worth the extra cost?

Yes, for most applications. The upfront investment can save you money down the road through reduced maintenance, extended roof life, and better compatibility with modern roofing systems including solar installations.

Can I install solar panels on any type of underlayment?

While possible, self-adhering or high-heat rated synthetic underlayments provide optimal performance for solar installations due to their sealing properties and thermal resistance.

Do building codes require specific underlayment types?

Yes, roofing underlayment is required by the International Residential Code and local codes, must meet ASTM standards. Requirements vary by location, roof type, and slope conditions. Double underlayment application is required for certain roof slopes.

What's the best underlayment for metal roofs with solar panels?

Metal roofing requires specialized high-heat resistant underlayment with temperature ratings of at least 240°F. For solar installations, self-adhering products with thermal resistance are ideal as they seal automatically around mounting fasteners.

🏠 Need Quality Roof Underlayment for Your Project?

Don't compromise on protection! Whether you're planning a new roof or preparing for solar panel installation, choosing the right underlayment is crucial. Get premium synthetic and self-adhering underlayment products that ensure waterproof protection and solar compatibility.

Get Roof Underlayment

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