Roofing tar paper, commonly known as roofing felt, is a foundational underlayment used beneath shingles and other roofing materials. At Lowe’s, homeowners and contractors can choose from traditional asphalt-saturated felt and modern synthetic underlayments. This guide explains what tar paper is, the types Lowe’s stocks, how to select the right product, installation basics, safety considerations, and cost expectations. Understanding these factors helps shoppers make informed decisions and ensure durable, weather-tight roofs.
What Is Roofing Tar Paper?
Roofing tar paper is an underlayment used between the roof decking and the final roofing material. Its primary functions are to provide a moisture barrier, protect the roof deck during installation, and offer a secondary line of defense against leaks. Traditional asphalt-saturated felt comes in rolls and has a characteristic brown, fibrous appearance. Synthetic underlayments, often made from polyethylene or polypropylene, deliver lighter weight, higher tear resistance, and improved performance in cold weather. Lowe’s stores typically stock both traditional and synthetic options to suit different roof types, climates, and budget needs.
Types of Tar Paper Available at Lowe’s
When shopping at Lowe’s, customers encounter two main categories: asphalt-saturated felt and synthetic underlayments. Each type has distinct advantages and best-use scenarios.
- Asphalt-Saturated Felt (Traditional Tar Paper): This is the classic option, usually sold in rolls labeled by weight (for example, 15-lb or 30-lb). It offers solid protection and is widely compatible with asphalt asphalt shingles. It tends to be more affordable upfront but is heavier and may be less permeable to moisture in some conditions.
- Synthetic Underlayment: Made from polymers, this option is lighter, more waterproof, and resistant to tearing. It typically provides better performance in windy or snowy environments and can be safer to handle due to reduced weight. Lowe’s often lists synthetic underlayments as a versatile choice for modern roof assemblies.
How To Choose The Right Tar Paper For Your Roof
Choosing the right underlayment depends on roof design, climate, and the final roofing material. Consider the following factors when shopping at Lowe’s:
- Climate and Weather: In cold or wet climates, synthetic underlayments may offer superior resistance to water intrusion and ice damming compared with traditional felt.
- Rooftop Material: Asphalt shingles pair well with asphalt-saturated felt, while metal or tile roofs may benefit from synthetic underlayment’s durability.
- Building Code Requirements: Some regions specify certain underlayment types or installation methods. Check local building codes and Lowe’s product guidelines.
- Installation Temperature: Some synthetic products install more easily in cooler temperatures; always follow the manufacturer’s guidance on temperature ranges.
- Ease of Handling: If a project involves long roof runs or limited crew size, lighter synthetic underlayments can reduce fatigue and improve efficiency.
Installation Basics: How To Lay Tar Paper
Proper installation ensures the underlayment functions as intended and protects the roof structure. Below are general steps, but always consult the manufacturer’s instructions for the specific product purchased at Lowe’s:
- Surface Prep: Remove debris and ensure the roof deck is dry and sound. Repair any damaged boards before laying underlayment.
- Starting Edge: Begin at the eave and work upward. Align the first course with a slight overhang past the drip edge to shed water correctly.
- Overlap: Place subsequent courses with an overlap of about 19–19 inches for felt or the product’s recommended overlap for synthetic underlayment. Shingle-style overlaps help channel water away from the roof.
- Fastening: Use corrosion-resistant nails or staples as specified by the product. For felt, nails are typically spaced every 6–8 inches along the top edge and 12–18 inches along the field. Synthetic underlayments may require different fastener patterns per manufacturer guidance.
- Seams and Attachments: Maintain smooth seams without wrinkles. Avoid tearing the material, especially near edges and ridges where wind uplift can occur.
Common Applications And Recommendations From Lowe’s
Lowe’s guidance often emphasizes matching the underlayment to the roof type and local climate. General recommendations include:
- New Construction: Synthetic underlayments are popular for their durability and quick installation, especially on roofs with complex shapes.
- Renovations: Asphalt-saturated felt is a reliable choice for re-roofing with existing asphalt shingles or when budget is a major consideration.
- Weather-Resistant Regions: In regions with heavy rain or snow, opting for high-performance synthetic underlayment can improve long-term moisture protection.
- Professional Preference: Contractors often select underlayments based on project timelines, equipment, and local code requirements, with Lowe’s stocking a range to accommodate these preferences.
Cost Considerations And Where To Buy
Pricing for tar paper at Lowe’s varies by type, thickness, and length of the roll. Typical ranges are:
- Asphalt-Saturated Felt: Generally the more affordable option, priced per roll and per square footage covered.
- Synthetic Underlayment: Usually higher upfront cost but provides greater durability and lighter weight, potentially delivering labor savings on larger projects.
Shopping tips for Lowe’s customers include comparing price per square foot, checking packaging for the correct weight or type, and taking advantage of home improvement promos or bulk discounts for large roof projects. Availability may vary by region, so it’s wise to check Lowe’s online catalog or call a local store for current stock and pricing.
Safety And Best Practices
Handling tar paper requires attention to safety and proper technique. Key safety and best-practice points include:
- Personal Protective Equipment: Wear gloves, eye protection, and sturdy footwear. In hot weather, take breaks to avoid heat exposure.
- Weather Awareness: Do not install underlayment during rain or when surfaces are wet, as this can compromise adhesion and performance.
- Storage: Store rolls on a flat surface, off the ground, and away from direct sunlight to prevent deformation.
- Warranty And Codes: Retain receipts and install according to manufacturer instructions to maintain warranties and code compliance.
Alternatives And When To Consider Them
In some projects, homeowners might explore alternatives to traditional tar paper. Consider the following:
- High-Quality Synthetic Underlayment: Offers superior tear resistance and water resistance, with longer service life in challenging climates.
- Liquid Roof Underlayment: A liquid-applied membrane can seal complex roof areas and penetrations, though it’s typically used in conjunction with other underlayments.
- Combination Systems: Some roof systems combine a durable underlayment with a vapor barrier to meet specific energy and moisture control goals.
Maintenance And Longevity
While tar paper itself is an underlayment, proper installation supports roof longevity. Regular inspection after severe weather helps identify lifted edges or damaged sections. Replacing underlayment may be necessary if shingles or metal panels are removed for repairs. Lowe’s product lines often correspond with manufacturer recommendations regarding replacement intervals and compatibility with new roofing materials.
Frequently Asked Questions
Q: Can I install tar paper over old underlayment? A: It is possible but not always recommended. Most projects require removing the old underlayment to ensure a proper bond and performance of the new layer. Always follow the roof material manufacturer’s guidance and local codes.
Q: How long does tar paper last? A: Underlayment lifespan depends on material type, climate, and exposure. Synthetic underlayments typically offer longer service life than traditional felt when installed correctly and protected from damage.
Q: Is tar paper necessary with modern roofing? A: Many local building codes still require underlayment as part of a complete roof assembly. Even with modern roof coverings, a proper underlayment layer provides essential moisture protection.