Delta 328-sq ft Standard 0.3125-in Flooring Underlayment
SKU: 48157397017

Delta 328-sq ft Standard 0.3125-in Flooring Underlayment

Sale price$147.63 Regular price$164.03
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Description

Delta 328-sq ft Standard 0.3125-in Flooring UnderlaymentDelta DELTA FL Moisture Resistant Flooring Underlayment Roll A premium polypropylene underlayment designed to create a sealed vapor barrier over concrete floors, keeping basements warm and dry. The dimpled DELTA FL membrane installs quickly and provides a strong, even subfloor with minimal height increase. Key Features: Moisture Protection: Sealed vapor barrier helps prevent moisture rise from concrete slabs Basement Comfort: Thermal break makes

Delta DELTA-FL Moisture-Resistant Flooring Underlayment Roll

A premium polypropylene underlayment designed to create a sealed vapor barrier over concrete floors, keeping basements warm and dry. The dimpled DELTA-FL membrane installs quickly and provides a strong, even subfloor with minimal height increase.


Key Features:

  • Moisture Protection: Sealed vapor barrier helps prevent moisture rise from concrete slabs
  • Basement Comfort: Thermal break makes floors feel warmer and drier
  • Strong Subfloor: Provides a durable, even base for laminate installations
  • Low Profile: Adds only 5/16-in (8-mm) to floor height for minimal headroom loss
  • Easy Installation: Roll format with tape seams for fast, straightforward setup

Specifications Table:

Specification Details
Collection Name UNDERLAYMENT
Type Roll
Coverage Area 328 sq ft
Length 65.5 ft
Width 4.75 ft
Thickness 0.3125 in
Material Polypropylene (high density polyethylene enhancements)
Antimicrobial Yes
Cushioning No
Grade Premium
IIC Rating 20–25
Moisture Resistant Yes
Mold/Mildew Resistant Yes
Package Quantity 1
R-Value per Inch 1.92
Sound Absorbing Yes
STC Rating Less than STC-30
Vapor Barrier Yes
Warranty 5-year limited

Frequently Asked Questions (FAQ):

Q: What flooring types can be installed over this underlayment?
A: Laminate flooring can be installed directly on DELTA-FL; use appropriate subfloor panels where required by local codes.


Q: Is it mold and mildew resistant?
A: Yes, the polypropylene membrane is moisture, mold, and mildew resistant.


Q: How thick is the underlayment and how much height will it add?
A: The membrane thickness is 0.3125 inches and adds approximately 5/16 inch (8 mm) to floor height.


Q: What is the coverage per roll?
A: Each roll covers 328 sq ft (4.75 ft W x 65.5 ft L).


Q: Does it provide sound reduction?
A: Yes, it offers sound absorbing properties with an IIC rating of 20–25.


Elevate the Basement: A Warm, Dry Foundation for Luxe Floors

DELTA-FL lays a sleek, dimpled foundation that transforms chilly concrete into a cozy canvas for refined finishes. Its discreet profile delivers a clean, even base while quietly guarding against moisture. Pair it with rich laminates for a seamless, sophisticated look—your floors will feel warmer and more inviting. Consider it the essential first layer for effortless, luxurious living from the ground up.


Create a warmer, drier, and stronger floor—add Delta DELTA-FL underlayment to your project today.

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: 48157397017

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4.2 ★★★★★
Based on 1611 reviews
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cryomerlin
Phoenix, US
★★★★★ 4
It works but not so sure about the EMI/RFI noise filtering claim
Color: Black, Size: 8 Outlet, Style: Outlets Only
I only buy surge protectors that have EMI/RFI noise filtering. I have a sensitive short wave radio with a sleep timer that I use when going to sleep. It has a rechargeable battery so you can either use it plugged in or on battery power. I've always had static on the radio when it was plugged into this surge protector. Cords generally do cause interference in radios so I thought nothing of it. But it started to get really bad. So I took one of my old tripplite surge protectors with emi/rfi noise filtering and plugged the radio into that. No static or interference on the radio at all. I went to APC's website to see if this model has EMI/RFI and it looks like it does....but it sure doesn't work well on mine. I don't want to disparage APC. I have several of their surge protectors. Just bought the big P12U2 model they have and love that one. I think it just has better circuitry than this budget model. I'm using the P12U2 on my TCL 55" TV that was flickering and was glitchy turning on and off with a different surge protector from another company. Anyways, the ACP P12U2 works great and appears to have excellent noise filtering. Just wish the P12U2 had a flat plug because I bought it to use for my computer, but couldn't because I couldn't push my desk up against the wall with that straight out plug. Anyways, I've strayed. This is a good basic surge protector I suppose. Would not recommend it for sensitive electronics prone to interference. Then again, maybe I just had a bad one, who knows. APC is a great brand. All my surge protectors are either APC or TrippLite. Can't go wrong either way.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 28, 2022
A
Verified Purchase
Amazon Customer
Bozeman, US
★★★★★ 5
Great surge protector
4 years later and still working as intended.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 22, 2026
S
Verified Purchase
Savvy Shopper
Grantham, US
★★★★★ 5
It Works
This works fine. Good size. Good enough cord length. Does what a power strip should do.
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Reviewed in the United States on March 21, 2025
M
Verified Purchase
Mani's World
Draper, US
★★★★★ 5
Great for multiple adapters
Color: Black, Size: 8 Outlet, Style: Outlets Only
One of the common flaws of single width strips is the inability to accommodate more than 1 adapter unless you want to waste the sockets as the adapter obstructs/covers the adjacent sockets. This one has 2 rows with sockets at 90 degrees. As such, adapters face outward and do not obstruct adjacent sockets. Well made and sturdy, typical of APC quality. Hopefully the surge protection won't be tested but gives you peace of mind to know that all plugged in devices are protected. I have it mounted under my office desk using the mounting holes at the back. Great value for the money.
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Reviewed in the United States on May 18, 2022
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Verified Purchase
Henry
Lake Worth, US
★★★★★ 5
A household staple
Style: Data/Line Protection - 12 ft
I use this power strip for both my computer and entertainment setup, and it has been very reliable. The seven outlets give me enough room for everything without having to use multiple strips. The cord is long enough to reach the wall easily while keeping things neat. It sits flat on the floor and does not tip over when everything is plugged in. The layout of the outlets makes it easy to plug in larger adapters without blocking others. It has already gotten a lot of use and should give me plenty more for years to come.
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Reviewed in the United States on August 13, 2025

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