roof underlayment
Skip itWeak search conversion (1.1%) — this niche doesn't clear our bar today.
Review moat
Incredible89.5avg incumbent reviews — the moat a new listing must climb
Avg price
Great$78.30avg listing price — sweet spot $15–$100
Brand share
Good66%top-5 brand share — brands hold most of the demand
Growth
Good+22.5%90-day search growth — must beat 0% to launch
Price range
Okay$8.32–$186.16cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Competition
Okay62%top-5 click share — leaders hold, buyers still browse
Returns
Bad5.0%return rate — above 5% kills the launch gate
Market size
Bad$59K$59K/yr · 66K searches
Conversion
Bad1.1%search→purchase rate — share of searches ending in a sale
According to Flapen's Amazon United States niche tracking, roof underlayment is a $59K/yr Amazon United States market (66K searches/yr). The top 5 brands hold 66% of demand. Verdict: Skip it — 42/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
roof underlayment market data
- Units sold / yr
- 1K–1K
- avg 0–100/product
- Revenue / yr
- $78K–$98K
- units × avg price
- Conversion rate
- 1.1%
- Avg BSR
- #1,254
- Page quality
- 0%
- Prime
- 59%
- Sponsored
- 68%
- Out of stock
- 9.3%
- Avg brand age
- 60 months
- Avg seller age
- 175 days
Competition & brand share
The top 5 products take 62% of clicks — established leaders, but buyers still shop beyond them.Brands
18 flat
Sellers
51
Top-5 brand share
66%
Top 20: 100%
Top-5 click share
62%
Top 20: 98%
Open market
28%
- Grip-Rite24%
- SIPA12%
- ADFORS11%
- BXI9%
- ROBERTS9%
- American Saturated Felt7%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +22.5% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.7×
Top roof underlayment search terms
- roof underlayment11K/yr
- roofing paper11K/yr
- roofing felt11K/yr
- roofing underlayment9K/yr
- tar paper for roof8K/yr
- synthetic roofing underlayment3K/yr
- synthetic roof underlayment3K/yr
- roof felt3K/yr
- roofing tar paper3K/yr
- roof underlayment waterproof4K/yr
Top roof underlayment products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 22 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Grip-Rite SL154250LWE 48 in. x 250 ft. (1000 sq. ft.) Synthetic Roofing Underlayment
Grip-Rite$60.014.9★26 rev
SIPA 100 GSM Synthetic Waterproof Roof Underlayment 48 x 250 (1)
SIPA$77.164.4★149 rev
BXI SBS Modified Bitumen Waterproofing Membrane Roll 13 Inch x 8.2 Feet Thick Flexible Torch-on Asphalt Roofing Material Self-Healing Flashing Sealant Outdoor Roof Foundation Ice and Water Shield
BXI$38.413.6★34 rev
Saint-Gobain FibaTape ADFORS Roof Repair Fabric - 6 inches x 25 feet - Black
ADFORS$8.324.3★69 rev
ROBERTS 70-115 Moisture Barricade Underlayment Film for Vinyl Laminate SPC Engineered Wood Floors 6 mil. Thick Polyethylene 120 Sq. Foot Roll Black
ROBERTS$21.784.5★801 rev
Newest
by launch date
Pushglossy 1 Roll EPDM Rubber Roofing Membrane 39 x 10ft Butyl Self-Adhesive Waterproof Underlayment 50 Mil Butyl Rubber Backed Flat Roof Sheet Ice and Water Sheet for RV Shed Garage and Patio
Pushglossy$73.0825 rev
foriy Waterproofing Membrane 39.6in x 196.9in Self-Adhesive Roofing Felt Bitumen Waterproof Repair Tape Roof Underlayment Protector Roll Patch Seal Tape Roof Cladding for Roof Leak (3.3x16.4ft)
foriy$70.454 rev
FT Synthetics Platinum HT-SA Ice & Water Roofing Underlayment 41 mil 36 x 67 High-Temp Self-Adhering Nail Sealable UV Resistant ASTM/CSA Certified Lifetime Warranty
FT Synthetics$159.001 rev
HURDEX Breathable House Wrap & Roof Underlayment 40 in x 33 ft (108 Sq Ft) - 170 GSM Heavy-Duty Weather Resistant Barrier 3-Layer Waterproof Building Wrap for Sheds Garages Tiny Homes & Cabins
AGROLIFE$35.042 rev
HSS EPDM Waterproofing Membrane EasyStick - 52 Mil - Reinforced - Waterproof - self-Adhesive - Longlasting Waterproof Sheet - Black - 39 inch x 16 feet
HSS$129.4362 rev
Trending
90-day click momentum
GAP Roofing Black 216 sq. ft. #30 Roofing Felt
GAP$64.845.0★
GAP Roofing 15 lb. Black Roofing Felt
GAP$57.580.0★
Empire USA - Camel Billiard Worsted Speed Cloth/Felt - 8ft
Empire USA$135.803.8★
HURDEX Breathable House Wrap & Roof Underlayment 40 in x 33 ft (108 Sq Ft) - 170 GSM Heavy-Duty Weather Resistant Barrier 3-Layer Waterproof Building Wrap for Sheds Garages Tiny Homes & Cabins
AGROLIFE$35.043.3★
Tarco Std30 36X72 #30 Asphalt Felt Felt Asphalt Rolls
Tarco$66.910.0★
What buyers say about roof underlayment
What buyers praise and complain about, mined from review topics.What buyers love
“High Quality and Easy to Install”
“Works as directed”
“Worth every penny”
“easy to use”
“Great product and easy to use, feels duranle and looks great after install”
“It works”
“It's real sticky”
“quick and easy repair”
“This was the perfect product to waterproof the roof of our shed”
“Always works”
What buyers complain about
“Zero Stickiness, Unusable”
“It's very thin”
“Small”
“Kinda hard to screw up”
“That means you probably know how impossible it is to keep flat roofs from leaking constantly”
“During heavy rain, water gets inside”
“Wrong color”
“Zero Stickiness, Unusable”
Top return reasons
Common questions
- Is roof underlayment profitable to sell on Amazon United States?
- The niche generates $59K/yr across 22 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +22.5%. Flapen's verdict: Skip it (42/100).
- How competitive is the roof underlayment niche?
- 18 brands and 51 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 66% of demand.
- What do buyers complain about in roof underlayment?
- Top complaints mined from reviews: Adhesion/Stickiness, Thickness, Size-Overall. The return rate is 5.0% — above our launch gate.
- When does demand for roof underlayment peak?
- Demand is steady year-round — the busiest month runs 1.7× the quietest.
- What does it cost to enter the roof underlayment niche?
- Listings span $8.32–$186.16; the average listing price is $78.30 (sweet spot $15–$100). The average incumbent carries 90 reviews — the moat a new listing must climb.