For Use With

• Commercial Luxury Vinyl Tile Flooring Installation System
• Residential LVT Planks Installation System
• Engineered Stone Tile Installation
• May be used as a moisture barrier for hardwood

Not for use in areas with heavy rolling loads or static loads greater than 250 psi. Installations of resilient flooring over underlayments such as S-1840 may be more susceptible to indentation.

Product Information

Gauge	.039″ (1 mm)
Width	6 ft
Length	50 ft
Color	Black
Acoustical Data	Armstrong Luxury Flooring 2 mm (.080”) & Quiet Comfort™ Luxury Flooring Underlayment IIC = 64 over 6” concrete with Suspended Ceiling  (ASTM E 492) IIC = 53: over Wood Subfloor (lightweight gypsum concrete over ¾” OSB) with Drywall Ceiling STC = 62 over 6” concrete with Suspended Ceiling (ASTM E 90) STC = 57: over Wood Subfloor (lightweight gypsum concrete over ¾” OSB) with Drywall Ceiling
Installation	Location: All grade levels Use on concrete, wood underlayment, existing vinyl System: Glue-Down and Loose-Lay Luxury Vinyl Tile installations Install: See information below
Type	Black foam roll
Advantages	For select Armstrong residential and commercial LVT products. Can be used as a moisture barrier for hardwood Acoustical underlayment Built-in moisture barrier which resists mold and mildew Cross Linked polypropylene foam Superior through-the-floor and in-room footfall noise reduction Exceeds industry standards for moisture protection Compensates for slight subfloor irregularities Made in the USA and patent protected
Coverage	300 sq. ft. per roll
Manufacturing Location	USA

Language	English/Spanish/French
Size	300 sq ft / roll
Item No.	01840101
Item/ UPC	042369874328
Dimensions	72″ x 6.5″
Weight Per Piece	6.1 lbs
Weight Per Carton	205 lbs
Rolls Per Carton	33
Cartons Per Pallet	2

SDS

S-1840 Quiet Comfort Luxury Flooring Underlayment SDS

Recommended Substrates

• Concrete on (all grade levels) according to ASTM F710 and Preparation of Concrete Subfloors
• Suspended Wood and Wood Underlayments
• Existing well-bonded resilient flooring; not perimeter-bonded or cushion-backed. single layer, fully adhered
• Radiant-heated subfloors where the surface temperature does not exceed 85^oF (29^o C)

Application Instructions

• Make sure the subfloor is clean, flat, dry and sound. It is important that the subfloor is free of all debris. Check the subfloor for unevenness or protruding objects such as nails or screws.
• When installing over concrete, the concrete must be dry with moisture vapor emission rate not exceeding 7 lbs. per 1000 square feet per 24 hours as measured by the Calcium Chloride Test and 93% RH using In-situ Probe.
• Begin in a corner and install the underlayment parallel to the wall in the opposite direction you plan to install the flooring planks. Leave at least 2˝ of excess underlayment up the wall and trim after completing the floor installation. See below for additional installation details.
• Roll out the next roll of underlayment in the same manner, making sure that the foam seams are butted together. The use of clear 2˝ wide packing tape can be used to attach the seams.
• When installing Armstrong Quiet Comfort™ Luxury Flooring Underlayment on concrete or below grade subfloors, be sure to tape the seams together with 2˝ tape that meets the moisture vapor transmission rate for this type of installation.
• All LVT products: Loose-Lay installations should not be exposed to direct sunlight for prolonged periods. It can result in discoloration and excessive temperatures that may cause expansion. The use of drapes or blinds is recommended during peak sunlight exposure. If drapes or blinds are not going to be used and expansion occurs in this area, we recommend adhering this area with S-995, S-295, or S-1000 Adhesive using the fine notch trowel. If using S-1840 underlayment in these areas, the underlayment must be adhered to the subfloor and the LVT adhered to the underlayment.
• Install the flooring according to Armstrong’s installation instructions.
• Do not use with S-319 Roll Strong adhesive.

Installation Process

• Installation Method by System: Glue-Down or Loose-Lay
  • For glued LVT installations, glue down underlayment.
  • For loose-lay LVT installations, float underlayment.

1. Install S-1840 underlayment (for glue down installations, adhesive must be dry to touch. Use a broom to push the S-1840 into the adhesive)
2. Install floor over underlayment

Product	Glue Down S-1840 to Subfloor	Float S-1840  over Subfloor	Glue Flooring to S-1840	Loose-Lay Flooring Over S-1840
Glue-Down LVT and Alterna Engineered Stone Tile	Y	N	Y	N
Loose-Lay LVT	Optional	Y	N	Y

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