SKU: 12420029734

RELIABILT N 48-in x 100-ft (100-sq ft) Synthetic Roof Underlayment, RB04100C

Sale price$30.85 Regular price$34.28
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Ships within 48 hours · Estimated delivery Sep 3 - Sep 8

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Description

RELIABILT N 48-in x 100-ft (100-sq ft) Synthetic Roof Underlayment, RB04100CRELIABILT Synthetic Roof Underlayment, 48 in x 100 ft A durable, lightweight synthetic underlayment designed to protect roofs as a secondary water shedding barrier. The RELIABILT N series rolls out flat, resists tearing in high winds, and installs easily with clear fastening guides. Key Features: Durable Synthetic Build: 4 layer technology resists stretching, tearing, and blow off in high winds Easy, Flat Install: Rolls out smoothly with clearly

RELIABILT Synthetic Roof Underlayment, 48-in x 100-ft

A durable, lightweight synthetic underlayment designed to protect roofs as a secondary water-shedding barrier. The RELIABILT N series rolls out flat, resists tearing in high winds, and installs easily with clear fastening guides.


Key Features:

  • Durable Synthetic Build: 4-layer technology resists stretching, tearing, and blow-off in high winds
  • Easy, Flat Install: Rolls out smoothly with clearly marked fastening guides for faster application
  • Weather Protection: Helps reduce leaks from severe weather as a secondary water-shedding layer beneath primary roofing
  • Versatile Compatibility: Suitable for asphalt shingles and wood shakes
  • Long-Lasting Assurance: Backed by a 20-year limited warranty

Specifications Table:

Specification Details
Series Name N
Material Synthetic
Application Method Nail
Coverage Area (Sq. Feet) 100
Length (Feet) 100
Width (Inches) 48
Weight (lbs.) 8.93
CA Residents: Prop 65 Warning(s) No
Warranty 20-year limited
For Use with Asphalt Shingles Yes
For Use with Metal Roofing No
For Use with Wood Shakes Yes
For Use with Flat Roofing No
UNSPSC 30151500

Frequently Asked Questions (FAQ):

Q: What roofing materials is this underlayment compatible with?
A: It is designed for use under asphalt shingles and wood shakes; it is not intended for metal or flat roofing.


Q: How large is each roll and what area does it cover?
A: Each roll measures 48 inches wide by 100 feet long and covers 100 square feet.


Q: How is it installed?
A: Install using nails; follow the printed fastening guides on the sheet for proper placement.


Q: Is this a waterproof membrane?
A: No. It is a water-shedding secondary layer meant to be used beneath the primary roof covering.


Q: What is the warranty?
A: It includes a 20-year limited warranty.


Streamlined Shelter with Modern Resilience

This underlayment quietly elevates the roofscape with a refined, grid-lined surface that feels tailored and precise. I love the four-layer construction—it’s the invisible armor that keeps the architecture confident through seasons. Pair it with dark architectural shingles to heighten contrast and create a crisp, contemporary silhouette. Consider it an essential foundation for luxurious living that values longevity as much as style.


Protect your next roofing project with RELIABILT’s durable N-series underlayment—order a roll today and build in lasting confidence.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 12420029734

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4.6 ★★★★★
Based on 14 reviews
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A
Verified Purchase
Amazon Customer
Los Angeles, US
★★★★★ 4
Colorful, comfortable, durable water shoes
Size: 8.5-9.5 Women/7.5-8.5 Men, Color: Shark Blue, Size: 8.5-9.5 Women/7.5-8.5 Men, Color: Shark Blue
I have ordered 5 pairs of these water shoes. The quality is amazing the bottom is durable, the stitching feels strong, they are comfortable, slip resistant, fit true to size and look awesome! We ordered the paisley, the blue geo, galaxy, lightning (lightning was sent back as we received the wrong size) and sharks. Only reason they are getting a 4 star instead of 5 is because I would much rather have the cushion inside sewn in instead of it being like an insert but that is what I find to be most common with these type of shoes.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
S
Verified Purchase
Susan L.
Chelsea, US
★★★★★ 5
Love these for beach foot protection!!
Size: 10-11 Women/9-10 Men, Color: Black-w001
These water shoes were perfect for our cruise to Grand Turk. The beach was a little rocky once in the water & the bottom of these shoes protected our feet and made it comfortable they dry quickly they are lightweight and easy to pack and carry in a beach bag. I bought two pair of the black one for me one for my husband, and he even wore them which was shocking into me and loved them.!!!! they don’t have walking support so they’re definitely something that you bring with you put on your feet before you enter like water where you can’t see the bottom or rocks/coral and they totally protect your foot on the bottom
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
T
Verified Purchase
TB
Massapequa, US
★★★★★ 3
I received someone else’s returned product
Size: 7-8 Women/6-7 Men, Color: Sunset
The inner product packaging was already cut open and not sealed, and there was debris inside the socks: clear indicators that the pair I received was someone else’s return. They also run big and are very wide in the toe area. My daughter’s pair also ran big, but at least hers were sealed. Overall quality is a bit flimsy, so we’ll see how long they last.
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Reviewed in the United States on May 31, 2026
S
Verified Purchase
SH
Grantham, US
★★★★★ 5
Decent water shoe
Size: 10-11 Women/9-10 Men, Color: N-laser Stripe
I have to admit, I was a bit skeptical about the quality of and comfort of these shoes because of the cheap price. However, I really do like them. They stay on my feet, are comfortably and non-binding, which is saying something because my feet have been pounded over the years. They even did well when I had to cross some rocks, trekking back to the kayak. Definitely a gods water shoe for a good price.
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Reviewed in the United States on May 25, 2026
N
Verified Purchase
Nettie
Bozeman, US
★★★★★ 5
Perfect!!!
Size: 7-8 Women/6-7 Men, Color: Black-w001
I absolutely love these water shoes. I wear them around the house, getting out of shower, even outside. I’m a stroke survivor that was paralyzed. One of the biggest hurdles of walking again is feeling the ground . One day I thought water shoes would work. After trying a few types I fell in love with these. So easy to put on. Comfortable. Feels one nothing on . I’m buying in multiple colors . Love love love these. Game changer for someone learning to walk again. My feet don’t sweat in them . I wear with and without socks . Easy to wash quick to wrong put and dry. Non slip.
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Reviewed in the United States on April 29, 2026

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