Importivity
Synthetic Underlayment, 100 gsmSave 65% vs SRS Building Products
The 4 pallet minimum256 rolls
At SRS Building Products
$24,320
Through us, DDP
$8,326
You save

$15,994

Synthetic Underlayment

Synthetic Underlayment, 100 gsm

The volume weight most crews run. 100 gsm woven synthetic, 48 in. by 250 ft, 10 squares to the roll.

$33.53/ roll$95.0065% off

$61.47 below SRS Building Products at $95.00 delivered, every roll.

One pallet is 64 rolls at $2,145.924 pallet minimum
PalletsDiscountPer rollTotal
4 min3%$32.52$8,326.16
8+5%$31.85$16,308.96
12+8%$31.05$23,846.40
4 pallets, DDP$8,326.16

256 rolls at $32.52 per roll, 3% volume discount included

You save $15,994 at this quantity, 66% off SRS Building Products

  • Freight, duty and tariffs in the price
  • Inspected before it ships
  • Any samples you want, $5

Product details

The weight most production crews settle on. At 100 gsm it walks and lays like the premium sheet but costs less per square, which is what makes it the right default for repeat residential work.

Woven polypropylene, slip-resistant embossed surface, UV-stable, and light enough that a single roll is a one-person carry up a ladder. Prints with course lines so the crew keeps overlap honest without a chalk line.

Specifications

Size
48" x 250'
Weight
100 gsm
Coverage
1,000 sq ft per roll
Sold by
Roll
Per pallet
64 rolls
Min. order
4 pallets (256 rolls)
Terms
DDP, USD

How does this price compare?

Every bar is a delivered price for the same product and the same roll. Ours is landed and duty paid, so nothing gets added to it afterwards.

  • Importivity, DDP$33.53
  • The Roof Store$38.95
  • Gulfeagle Supply$39.25
  • SRS Building Products$95.00
You save 65%$61.47 every roll
On one pallet
$3,934
vs $2,145.92 through us
On the 4 pallet minimum
$15,994
vs $8,326 through us
$33.53per rollDDP

Delivered duty paid is the price to your yard, not the price at the factory gate. Nothing below gets added to it afterwards.

What this price includes

  • The product itselfEx factory, made to the spec on this page
  • Ocean and inland freightPort to port, then onward to you
  • Import duties and tariffsPaid by us, at the correct rate
  • Customs clearance and insuranceEntry filed and cargo covered in transit
  • Final delivery to your yardOffloaded at the address you give us

Competitor pricing was captured for comparison and is subject to change; verify before quoting. Third-party names are trademarks of their respective owners, used for factual price comparison only. The per-unit and per-pallet figures are before the volume discount; the minimum-order figure includes it.

What this line costs you a year, and what you keep

Tell us how much work you put out in a year. We will size the order, apply the volume discount you would earn, and show what the same quantity costs at distributor pricing.

roofs
squares3,000 sq ft
rolls per year

330

Pallets to order

6 (384 rolls)

3% volume discount at this size

Your cost through us

$10,733

after $332 volume discount

Cost at SRS Building Products

$31,350

$95.00 per roll, delivered

At SRS Building Products
$31,350
Through us
$10,733
You keep, every year

$20,617

66% below SRS Building Products on 330 rolls across 100 roofs, including your 3% volume discount.

Compare against

Those are your numbers. Adding puts 6 pallets of Underlayment 100 gsm in your container, and the volume discount is applied at checkout.

Assumption: About 1.1 rolls per 10 squares, after course overlap. A square is 100 sq ft, so a 30 square roof is 3,000 sq ft. Both columns are priced on the same roll count. Change the inputs above and every figure updates. These are planning estimates for sizing an order, not a quote. Final DDP pricing is confirmed against your delivery address before anything ships.

Goes with this

The whole 2026 line card
Cap Nails, 1 in.Save 64%

Cap Nails, 1 in.

Our price, DDP
$9.94/ bucket

Freight, duties and delivery to your yard included

Per bucket
vs SRS Building Products
$27.75
You save
$17.81 / bucket

Plus up to 8% volume discount at checkout

See the full breakdown
Drip Edge, FHASave 23%

Drip Edge, FHA

Our price, DDP
$4.30/ piece

Freight, duties and delivery to your yard included

Per piece
vs wholesale, est.
$5.56
You save
$1.26 / piece

Plus up to 8% volume discount at checkout

See the full breakdown

Common questions

How much do I save on underlayment 100 gsm?
$61.47 every roll, which is 65 percent below SRS Building Products's delivered price of $95.00. Across the 4 pallet minimum, which is 256 rolls, that is $15,994 on a single order, including the 3% volume discount that order size earns.
How does the volume discount work on this line?
It comes off automatically at checkout, on top of the price shown. 4 pallets or more takes 3 percent off, 8 pallets or more takes 5 percent off, 12 pallets or more takes 8 percent off. This line has a 4 pallet minimum, so the smallest order you can place already earns 3 percent, worth $258.
What is the minimum order on underlayment 100 gsm?
4 pallets, which is 256 rolls and works out at $8,326.16 delivered duty paid after the 3 percent volume discount. One pallet is 64 rolls at $2,145.92.
Is freight on top of this price?
No. $33.53 per roll is DDP: product, ocean and inland freight, insurance, customs clearance, import duties and tariffs, and delivery to your destination are all inside it. The distributor prices we compare against are delivered prices too, so the gap is like for like.

$15,994 is sitting in one order of this.

That is the gap on the 4 pallet minimum alone, before the volume discount. Not ready to commit? Samples are $5 for the whole order, so you can check the goods on your own gun first.

Back to the line cardTalk to the roofing desk