Back to Catalog

Quantity Discounts

Add your order to your cart to see your final price. Additional discounts for contractors, AVS Forum members and US military.

PRODUCT USE

View our Product FAQ for answers to common questions about GenieMat products.

An underlayment needs to be resilient and dense to efficiently isolate impact footfall and airborne noise. GenieMat RST meets both of these requirements in each available thickness. The thinner RST-02 and RST-05 are recommended when the ceiling below has resilient clips or resilient channel installed. When the ceiling below is fixed to the framing, then the thicker RST-10, RST-12, or RST-15 are recommended. The thicker GenieMat RST versions are also recommended when a higher level of performance in isolating impact footfall and airborne noise is required.

GenieMat RST has been tested to perform under most common floor finishes including, but not limited to, tile, stone, wood, laminate, vinyl, VCT, and carpet with installation directly to wood, concrete, and steel sub-floors. The GenieMat RST has also been tested to meet ANSI standard 118.12 as a crack isolation membrane as well as IAQ test ASTM D5116 for zero VOC.

CONCRETE SUB-FLOOR

Rubber underlayment will always perform best over or under concrete, either full pour or lightweight. Because of the extreme mass and rigidity of the concrete, the rubber is able to compress properly allowing the rubber to add significant resilience to an otherwise rigid structure.

WOOD SUB-FLOOR

Rubber underlayment will not perform over wood sub-floors as predictably as it will over concrete. There are two great ways to mimic the performance of rubber over concrete in a wood structure. The best way is to fix the structural deflection between the joists (read Fixing Structural Deflection). The other way is by layering approximately 7 pounds per square foot of material over the sub-floor or over the GenieMat RST. Layering directly to the sub-floor will help more with low frequency airborne and footfall impact noise transfer while layering over the GenieMat RST will increase the STC rating by at least a couple points with a slight reduction in low frequency performance. Any heavy material will work for layering, e.g. plywood, OSB, MDF, drywall, 3/4" lightweight concrete, or a cementitious board like HardiBacker. Layering several pounds per square foot of material over the GenieMat RST is not required, but recommended in order to maximize the performance of the rubber underlayment in a wood structure.

Layering also provides an opportunity to add more damping to the floor with a product like our Green Glue Compound. Including Green Glue Compound will add to the isolation of both impact footfall and airborne noise. Decoupling the ceiling below with GenieClips or resilient channel increases the value of the GenieMat RST in both concrete and wood structures. The highest rated floor/ceiling assemblies will have resilience in both the floor and the ceiling.

Read our article Maximizing Rubber Underlayment Performance for more detailed information.

If the joists below can be stiffened using stepped blocking, then layering can be avoided. Read our article Fixing Structural Deflection for more detailed information.

ESTIMATING

GenieMat RST is only available in one size of roll per thickness. Partial or larger rolls cannot be purchased. Overestimating by 5% provides enough material for most projects. We suggest drawing the room dimensions and planning the installation layout to determine the appropriate number of rolls for the project.

GenieMat RST Sizes
Style Dimensions Coverage Thickness Roll Weight
GenieMat RST-02 4' x 75' 300 square feet 1/8" (2mm) 140 pounds
GenieMat RST-05 4' x 30' 120 square feet 1/4" (5mm) 110 pounds
GenieMat RST-10 4' x 15' 60 square feet 3/8" (10mm) 110 pounds
GenieMat RST-12 4' x 15' 60 square feet 1/2" (12mm) 130 pounds
GenieMat RST-15 4' x 15' 60 square feet 5/8" (15mm) 160 pounds

INSTALLATION

GenieMat RST Simple Installation Manual       PDF 3.5MB

GenieMat RST Technical Installation Manual PDF 230KB

The GenieMat RST can be cut with a standard razor knife. The rubber can have an odor to it when it first arrives. This smell typically fades away similarly to a newly painted room. If the smell lingers or the user is sensitive to the smell of rubber, cover the rubber with a 4-mil plastic sheeting.

INSTALLATION FOR FLOATING FINISHED FLOOR INSTALL

Follow these steps if installing a floating hardwood or laminate, nailed down hardwood, or carpet over the GenieMat RST.

  1. Roll out the material and cut to fit, leaving up to a 1/4" gap on the perimeter.
  2. Butt the seams together, avoid overlapping.
  3. Cover seams with standard duct tape. Fill in gaps with acoustical sealant before taping.
  4. Install flooring directly to the GenieMat RST or to the additional layering over the GenieMat RST if applicable.

INSTALLATION FOR FIXED FINISHED FLOOR INSTALL

When using grouted or fully adhered flooring materials, the GenieMat RST must be adhered to the sub-floor with a suitable adhesive. The finished floor can then be installed directly to the GenieMat RST.

  1. Use a 1/16" notched trowel to apply a urethane based adhesive to the sub-floor.
  2. Carefully lay the GenieMat RST into the wet adhesive to avoid wrinkles or air pockets. A 40+ pound roller is recommended for adhering the thinner RST-02 or RST-05.
  3. Cut the GenieMat RST to fit, leaving up to a 1/4" gap on the perimeter.
  4. Continue with the next row, butt the seams together, avoid overlapping. Complete each row before moving to the next.
  5. Cover seams with standard duct tape. Fill gaps with acoustical sealant before taping.
  6. Install flooring directly to the GenieMat RST or to the additional layering over the GenieMat RST if applicable.

SOUND TESTS

Independent Sound Test Results
Structure Assembly STC IIC
Concrete 8" concrete, no ceiling, RST-02, hardwood 58 54
Concrete 8" concrete, no ceiling, RST-02, tile 58 48
Concrete 8" concrete, no ceiling, RST-05, vinyl plank 58 55
Concrete 8" concrete, no ceiling, RST-05, hardwood 58 56
Concrete 8" concrete, no ceiling, RST-05, tile 58 50
Concrete 8" concrete, no ceiling, RST-10, vinyl plank 58 56
Concrete 8" concrete, no ceiling, RST-10, hardwood 58 56
Concrete 8" concrete, no ceiling, RST-10, tile 58 53
Concrete 8" concrete, no ceiling, RST-12, tile 59 55
Wood Wood joists, R-19 insulation, no flooring, single 5/8" drywall ceiling 43 32
Wood Wood joists, R-19 insulation, vinyl, double 5/8" drywall on GenieClips 54 51
Wood Wood joists, R-19 insulation, RST-02, carpet, double 5/8" drywall on GenieClips 53 58
Wood Wood joists, R-19 insulation, RST-02, hardwood, double 5/8" drywall on GenieClips 54 56
Wood Wood joists, R-19 insulation, RST-02, tile, double 5/8" drywall on GenieClips 54 57

PRODUCT SPECS

GenieMat RST Specs
R-Value (R-.1) Almost zero, safe for use above or below radiant heat
Fire Rating Dependent on rating of finish floor
Composition 94% recycled rubber
Installation Free floating, urethane adhesive, or thinset
TCNA Robinson Test Heavy commercial for RST-02, moderate commercial for RST-05, light commercial for other RST
Health Rating Zero VOC, healthy and environmentally friendly
LEED Points Adds up to 10 LEED points
Mold Growth Impermeable to water and inhibits growth of mold
GenieMat RST Downloads
GenieMat RST-02 Product Specs Download PDF 99KB
GenieMat RST-05 Product Specs Download PDF 99KB
GenieMat RST-10 Product Specs Download PDF 99KB
GenieMat RST-12 Product Specs Download PDF 99KB
GenieMat RST-15 Product Specs Download PDF 99KB
GenieMat RST Product Brochure Download PDF 1.4MB
Pliteq Floor/Ceiling Ratings Download PDF 512KB
GenieMat RST Simple Installation Manual Download PDF 3.5MB
GenieMat RST Technical Installation Manual Download PDF 230KB
GenieMat RST Technical Installation Manual For Vinyl Floor Coverings Download PDF 197KB
GenieMat RST 3-Part Guide Spec Download PDF 158KB
GenieMat RST 3-Part Guide Spec Download DOCX 405KB
QuietGround Name Change Info Download PDF 50KB