Installation Guide

Rev.1.12.09.10 11
4-F Final Wiring & Connections: See section 1-E.
Diagram A - Lay Fiberboard in Diagonal Pattern
5. Nailed –Down Wood Floors
WarmFlex may be installed under nail-down wood floors provided the installation complies with all local
and national codes, the installation steps outlined in Section 1, and the additional guidelines
enumerated below. The installation methods and final approvals at the installation site are the
responsibility of the Authority Having Jurisdiction.
4-A Electrical Rough-In: See section 1-A.
4-B Planning & Preparation: See section 1-B.
4-C WarmFlex™ Installation: See section 1-C
4-D Nailed-Down Wood Floor Installation:
It is highly recommended to connect InstAlarm® during the installation to warn about
accidental damage to the heating or lead wires.
1. Nails, screws or other fasteners must be installed without puncturing the heating elements, sensor
wires and cold lead wires.
2. Nails or other fasteners shall not be installed closer than 0.25” from a heating element, sensor or cold
lead wire.
3. In the event of inadvertent damage to the heated underlayment:
a. Call Thermosoft technical support at 800-308-8057 to discuss repair or replacement.
b. Although Thermosoft will advise and assist in repair or replacement, under no circumstances is
Thermosoft responsible for damage to the WarmFlex caused by nailing. The product warranty
becomes immediately void if this occurs.
4E. Wiring & Connections: see section 1-D.