Installation Guide
PERGO
®
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06/2021 | PAGE 2 OF 7
Locking Engineered Hardwood - Floor Installation Instructions
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™
The floor must be completely covered to eliminate uneven ambering from exposure to UV light.
Locking engineered hardwood flooring is suitable for use in climate controlled indoor installations only and should not be installed
over any floor with a sump pump or in a room with a floor drain. Room temperature should be 60-80°F, with relative humidity
between35-55%. These environmental conditions are specified as pre-installation requirements and must be maintained for the
life of the product. Additionally, any HVAC system must be in operation for a minimum of 14 days prior to performing moisture
tests or installation.
Building interiors are aected by two distinct humidity seasons–Heating and Non-Heating. Care should be taken to maintain
humidity levels between 35-55% year-round. As with all wood flooring, expansion and contraction will be minimized if the interior
relative humidity is consistently maintained year-round. Humidification and/or dehumidification systems may be necessary to
maintain your home environment to prescribed relative humidity conditions.
All heating methods create dry, low humidity conditions. Humidifiers are recommended to prevent excessive shrinkage or
gapping in wood floors due to seasonal periods of low humidity.
During the non-heating season proper humidity levels should be maintained by using an air conditioner or dehumidifier.
RADIANT FLOOR HEATING – This product can be used in combination with many types of in-floor heating. The heating system
can be cast in a concrete floor or in a thin layer of filler on the surface of a concrete subfloor. It can also be installed under a
wood subfloor or installed on the surface of the subfloor as an electrical matting if it meets the floor flatness requirements.
a. Follow the instructions from the supplier of the floor heating system.
b. Concrete subfloors must be installed and cured with no heat transfer for a minimum of 60 days.
c. The heating system must be in operation for at least two weeks before installation. The system may be turned o or
set to a suitable installation temperature (65 to 72°F).
d. The flooring surface temperature, which is the surface of the subfloor or the heat radiating from electric heating mats,
should not exceed 84°F (29°C).
CAUTION – Excessive floor heating will damage flooring planks. Radiant heating systems create dry heat that lowers interior
humidity levels. It may be necessary to add supplemental humidity in order to maintain recommended RH levels (35-55%) and
prevent damage to the wood floor.
A moisture test is strongly recommended to determine if high moisture exists in the subfloor. When using a calcium chloride
moisture test for concrete subfloors (ASTM F1869), values must be ≤ 5 lbs/1000ft
2
/24-hr or <80% RH with an in situ probe
(ASTM F2170). Moisture readings of wood subfloors must be ≤ 12%.
Acceptable job site conditions, including relative humidity and subfloor moisture conditions, must be maintained throughout the
lifetime of the flooring.
This product is installed as a floating floor only and requires the use of T-moldings in doorways 4 ft (1.22m) or less and in rooms
40 feet (12.2 m) or larger in length or width. Floor movement must not be constrained by glue, nails, screws, hardware or other
fixed obstructions.
This product must be installed in accordance with these installation instructions.