Roofing felt, also known as tar paper or underlayment, serves as a protective barrier between the roofing materials and the roof deck. One common question that arises during roofing projects is whether or not you should nail roofing felt. In this article, we’ll provide a clear and concise answer to this question, addressing both technical and non-technical audiences.
Why Roofing Felt is Important:
Roofing felt is a crucial component of a roofing system for several reasons:
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Water Resistance: It acts as a secondary water barrier, preventing water infiltration into the roof deck.
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Protection Against Moisture: It guards against moisture and condensation that can form under the roofing materials.
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Temporary Weather Protection: During roof installation, it provides temporary weather protection until the final roofing materials are in place.
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Enhanced Roof Longevity: Roofing felt helps extend the life of the roofing structure by preventing premature rot and deterioration.
Should You Nail Roofing Felt?
The answer is yes, you should nail roofing felt. Nailing roofing felt serves several purposes:
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Preventing Slippage: Nailing the felt secures it in place, preventing slippage during installation of roofing materials like shingles. Without nails, high winds or rain can displace the felt.
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Wind Resistance: Nails help the roofing felt withstand strong winds, ensuring it remains intact and functional.
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Ease of Installation: Nails hold the felt flat and taut, making it easier for roofers to work on top of it.
Nailing Guidelines:
Here are some key guidelines for nailing roofing felt:
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Use Appropriate Nails: Roofing nails, typically galvanized or stainless steel, are the best choice for securing roofing felt. These materials resist rust and corrosion, ensuring long-lasting performance.
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Proper Placement: Space the nails appropriately, usually 6-12 inches apart along the edges and 12-24 inches apart in the field of the felt. This provides adequate support and prevents any loose areas.
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Nail Depth: Drive the nails flush with the surface, but avoid overdriving, which can damage the felt or the roof deck.
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Overlap Correctly: Ensure that each layer of felt overlaps the previous one according to manufacturer recommendations, typically 2-4 inches, to prevent water from seeping through the seams.
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Follow Manufacturer Recommendations: Always adhere to the manufacturer’s instructions for the specific roofing felt you are using.
Conclusion:
Nailing roofing felt is a fundamental step in the roofing process. It secures the underlayment, prevents slippage, and enhances wind resistance. By following the appropriate nailing guidelines and using the right materials, you can ensure that your roofing felt performs its vital function of protecting your roof structure and extending its lifespan.