Riverstone Installation & Maintenance Guide

Riverstone Stone Core Vinyl Plank is a waterproof floor but should not be used to seal an existing floor from moisture. It cannot inhibit the growth of mold or prevent structural problems associated with or caused by flooding, excessive moisture, alkalis in the sub-floor, or conditions arising from hydrostatic pressure. Regardless of location, always remove standing water, urine, and other liquids promptly. Moisture issues should be addressed and corrected at the job site prior to installation.


It is the installer’s responsibility to verify the product is the correct product, color, pattern, and quantity. Check each board for visual defects before installation. Claims will not be accepted for flooring that has been cut to size and/or installed. LW cannot accept responsibility for flooring installed with visible defects. Color variations are to be expected. For best visual effect, shuffle planks from several cartons during installation.


The floor covering should be stored and installed in a climate controlled location with a temperature between 55° - 85°F (- 13° - 29°C) or average temperature of 70°F (21.1° C). If the product is stored in temperatures outside this range prior to installation, it is recommended to acclimate the material for 48 hours prior to installation.


Prior to installation of any flooring, the installer must ensure that the job site and sub-floor meet the requirements of this instruction. All sub-floors must be clean, flat, dry and structurally sound. Moisture issues should be addressed and corrected at the job site prior to installation.

The sub-floor should be flat within 1/8" in a 6-foot radius or 3/16” within a 10-foot radius. The substrate should not slope more than 1” per 6 feet in any direction.

Do NOT add additional underlayment. Product has an attached pad and the use of an additional underlayment is NOT approved.

CAUTION: Some types of nails, such as common steel nails, may cause discoloration of the vinyl floor covering. Solvent-based construction adhesives are known to stain vinyl floor coverings. All responsibility for discoloration problems caused by the use of the above-mentioned products is not the responsibility of LW Flooring.

Wood Sub-floors

Do not install material over wood sub-floors that lay directly on concrete or over dimensional lumber or plywood used over concrete. LW recommends checking wood substrates for moisture. Obvious signs of moisture issues include warping, peaking, degradation of substrate integrity, rusted fasteners, and rusted floor registers. Even if obvious signs are not present, the material should be tested using an invasive moisture meter and moisture levels should not exceed 14%.

  1. Do not apply sheet plastic over wood subfloors. 
  2. Basements and crawl spaces must be dry. Use of a 6 mil black polyethylene is required to cover 100% of the crawl space earth. Crawl space clearance from ground to underside of the joist is to be no less than 18” and perimeter vent spacing should be equal to 1.5% of the total square footage of the crawl space area to provide cross ventilation. Where necessary, local regulations prevail.

Concrete Sub-floors

LW recommends testing concrete substrates for relative humidity, moisture, and pH before installing LW SPC. Test results should not exceed 85% relative humidity (RH). The Calcium Chloride Test for the moisture should be no more than 8 lbs per 1000 SF in 24 hours MVER (Moisture Vapor Emission Rang) and pH tests for alkalinity levels should register between 6 and 10.

Radiant Heat

Radiant heating systems must be cast ½” below the surface of the concrete slab and should be operating at least 2 weeks before installing LW SPC. Set the temperature of the radiant heating system to 65°F 72 hours before, during, and 72 hours after installation. The temperature of the radiant heat floor may be increased gradually 72 hours after installation, in increments of 5°F, but the surface temperature should never exceed 85°F. Contact the manufacturer of your radiant heating system for further recommendations.

Note: Follow and comply with various Federal, State and Local government agencies’ regulations governing the removal of in-place asbestos containing material. If you contemplate the removal of a resilient floor covering structure that contains (or is presumed to contain) asbestos, you must review and comply with all applicable regulations. Unless positively certain that the product is a non-asbestos containing material, you must presume it contains asbestos. 


LW SPC flooring is designed to be installed utilizing the floating method. Never secure the planks to the sub-floor when using the floating installation method. Do not install cabinets or fixed objects on top of the flooring. Proper expansion space (5/16”), 8mm is required. Undercut all doorjambs. Do not fasten wall moldings and or transition strips to the planks. Installation exceeding 32 feet in each direction with direct sunlight and installation exceeding 65 feet in each direction with no sunlight exposure require expansion trim.

LW SPC is approved for glue down installation over approved wood and concrete substrates. On, above and below grade. Please refer to the adhesive manufacturers' installation guidelines. Always follow adhesive manufacturer’s recommendation for correct trowel notch, open me and spread rate. NOT adhere any tape to the face of the floor as it will damage the finish. No claims will be processed for tape damage.

Note: SPC uses a fold-down locking system, where planks are angled into the locking system then dropped into place. TO UNINSTALL - Lift an entire row of SPC carefully and gently at an angle. To remove individual boards leave flat on the ground and slide them apart. If boards do not separate easily lift the planks at a slight angle when sliding apart. 

  1. Plan the direction of the area to be installed to maximize the visual appearance once installed. The direction of the plank grain should be confirmed and the installation should be balanced from the center of the area. Proper planning and layout will prevent having narrow plank widths at wall junctures or very short length pieces at the end of rows. As with all plank products, install the planks parallel to the longest exterior wall.
  2. Start from the top left corner of the room by putting the first plank in place so both the head and side grooves are exposed. Planks should be installed from left to right. To assist in laying the first row straight, using straps across each short end locking system is recommended. Continue this for the first two rows and remove after completion of installation. 
  3. Use spacers along the walls to maintain proper expansion space (5/16”) and align the first plank. Determine if the starter row will need to be cut. If the first row of planks does not need to be trimmed in width, it will be necessary to cut off the unsupported tongue so that a clean, solid edge shows towards the wall. 
  4. Install the second piece in the first row by laying the short-end tongue onto the previously installed piece short end groove. Lock the pieces together by firmly pressing down with your thumb along the seam to lock the planks together. You will hear and feel the pieces lock together as the locking tab engages in the joint. Use a so rubber mallet to vertically engage the joint. 
  5. Continue this manner for the rest of the first row. Make sure to maintain a 5/16” space between the first row and the walls. 
  6. Start the second row by cutting a plank to the desired length. Keep in mind that the plank must not be shorter than 6" (15cm) to achieve the best appearance. Install the first piece in the second row by inserting the long side tongue into the groove of the piece in the first row at a low angle into the installed piece. Then firmly lower the plank while maintaining a slight pressure towards the installed piece. The pieces should fit snugly together and lay flat. Finish the remainder of the second row. 
  7. It is critical to keep the first two rows straight and square since they are the foundation for the rest of the installation. Check often for straightness while installing the floor as failure to do so can result in gapping. 
  8. Continue installing planks and make sure to achieve a random appearance with end pieces of minimum 6" - 15cm. 
  9. Check to be certain all planks are fully locked. If slight gapping is noticed, or pieces will not lie flat, simply disengage the long side joint and carefully slide the short end joint apart. Do not pull up on this joint as it will damage the locking mechanism! Reinstall the piece. 
  10. To fully engage the short end, apply light pressure and press down to engage the end joint. If the end is raised, use a non-marking rubber mallet to lightly tap the end (tongue side) about 1” from the seam. Do NOT tap directly on the seam. 
  11. When fitting around obstacles or into irregular spaces, planks can be cut easily and cleanly using a utility knife with a sharp blade. It is often beneficial to make a cardboard template of the area and transfer this pattern to the plank. 
  12. Install wall and door moldings last. Protect all exposed edges of the flooring by installing wall molding and/or transition strips. Be sure that all moldings are fastened directly to the wall or sub-floor. Do not place any fasteners through the floating vinyl flooring. 
  13. For wet areas, such as bathrooms, caulk the perimeter of the floor with a silicone caulk.


NEVER use wax or oil based cleaning agents. All-purpose cleaners are not recommended as they can dull your floor’s finish or leave a hazy residue.

  • LW Flooring recommends Bona brand cleaning products, which are widely regarded as the best cleaning solution for urethane finish flooring. 
  • Sweep, vacuum or dust mop regularly. 
  • Use walk-off mats at entrance doors and in front of kitchen sinks. 
  • Install proper felt protectors under chair and furniture legs to prevent scratching. 
  • Close curtains or blinds to limit direct sun exposure, which can cause discoloration and thermal expansion.