5A. RADIANT PANEL SYSTEM®
PLANNING & INSTALLATION MANUAL (rev)
ROTH HEATING SYSTEMS
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5A. INSTALLATION INSTRUCTIONS
5A.1 Planning
Roth Radiant Panel Systems® can be installed on all types of sub-floors, which comply with the
current building regulations for load-bearing structures. If the system is going to be installed upon an
existing surface material (e.g. vinyl mat, ceramic tiles, etc.), it must be approved by the flooring
contractor.
The floor panel system has a normal operating range of 60-140°F (15-60°C), depending on the
radiant heating system design and finished floor material. Underlayment, vapor barriers, water-
proof membranes, etc. should be selected with the actual operating temperatures in mind. Be
sure to discuss the design parameters with the flooring contractor prior to installation.
Before starting the installation, you need to plan your loop layout and manifold locations. We also
recommend installing tubing in every track to achieve the best heat distribution.
Try to plan the pattern so that the Master Panels are aligned to allow the loop supply to run along
the outer wall. If installing a wood floor over the panel, align the panel so the loops are running in
the opposite direction of the wood flooring material.
In wet areas, such as bathrooms, etc., where a water-tight layer is requested, the membrane
should be installed above the panel system. Always coordinate these installations with the
flooring contractor.
5A.2 Delivery Content
The Roth Radiant Panel System® is delivered in one box consisting of:
Master Panels,
10 pcs., 24" x 48"
PLEASE NOTE:
Panel System for ⅜” tubing is ¾” thick.
Panel System for ½” tubing is 1” thick.
Radius Panels,
3 pcs., 16" x 24"
Each panel is perforated and can easily be
snapped into 2 pieces (total of 6 pieces).
Transition Panels,
3 pcs. 16" x 24"
Each panel is perforated and can easily be
snapped into 4 pieces (total of 12 pieces).
5A1
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5A. INSTALLATION INSTRUCTIONS
5A.3 Installation of the Panel
The sub-floor must be smooth, clean and level. Surface irregularities should not exceed more
than 0.02" per foot. The Roth Radiant Panel System® should be secured to the subfloor with
countersunk screws or a foam board compatible adhesive. Apply the adhesive according to the
manufacturer’s instructions.
Start the installation by laying the radius panel first. If you need an extra track you can start with a
transition panel. A strip of plywood can be installed on the perimeter for tack strip when carpet is
the finished floor material. It is important to plan the installation in advance to be sure that you
have the correct number of tracks when installing the tubing. Transition and radius panels can
be installed upside down as filler pieces.
When securing the panels to a wood subfloor, we recommend using at least eight (8) countersunk screws spaced 12” (30 cm)
apart and 6” (15 cm) from the edges. When installing over concrete, you can use countersunk concrete fasteners in the same
pattern. Be aware that floor conditions may require use of additional fasteners. The panels can also be secured with latex base
adhesives compatible with foam board products. These are applied with either a caulking gun or notched trowel. Follow the
manufacturer’s instructions for application. Curing time can vary widely between brands of adhesive and with the temperature
and humidity conditions at the time of installation.
5A 2
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5A. INSTALLATION INSTRUCTIONS
Continue to lay the master panels. When
cutting the master panels, mark the plate and
saw it with EPS side up. You can use any
saw with a fine-toothed metal blade. After
cutting the panel, remove any burrs. When
cutting the last master panel in the first row,
use the rest of the panel to start the next
row. This will provide staggered joints for the
field panels.
After completion of the panel installation in an area, use a vacuum to clean up thoroughly
before installing the tubing. Dirt and debris in the tracks can create noise when the system is
put into operation.
5A 3
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5A. INSTALLATION INSTRUCTIONS
5A.4 Installation of PEX-tubing
Start the tubing installation by connecting
the PEX tubing to the manifold. Loops can
be pre-cut if you have figured the correct
leader length (from the manifold to the
actual heated area) when designing the
system with our software. The Radiant
Heating Tubing Requirements Report will
give you the information to cut the loops
from full rolls of tubing with the least
amount of waste.
Install the tubes by unrolling the coil and
stepping the tubes into the tracks in the
panels. Use hard shoes or a wooden piece
on top of the tubes in order to fasten the
tubes in the tracks. Be sure to use a block
when using a hammer or mallet to set the
tubing to avoid denting the aluminum
surface. Follow the loop layout you have
planned and connect the return tube to the
manifold. It is very important that the tubes are snapped down completely into the tracks.
When installing the tubing in the radius panels it is important to pull the tubing tightly around the
bends. This will allow a space for tubing expansion during operation and greatly decrease the
chance of noise during operation. When laying the tubing into the transition pieces we
recommend using a bead of silicone adhesive to secure the tubing because the tubing is loose
in these pieces. We recommend installation of the panel and tubing when ambient
temperatures are above 40°F (4.5°C).
5A 4
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5A. INSTALLATION INSTRUCTIONS
5A.5 Pressure Test/Start-up
After installation of the panel and tubing, but before laying the finished floor, you need to perform a pressure test. Fill the
system with air or water and maintain a pressure of 2 to 3 times the working pressure of the system, about 25 to 50 psi (1.7
to 3.4 bar) for 6 hours. Use a leak detection solution (if testing with air) to locate and repair any leaks in the system. A small
leak can take a long time to register on a 60 psi (4 bar) gauge. Please note: If the system cannot be started up after the
pressure test and there is a danger of freeze, you must use air or a glycol solution! Do not use plain water! Run the system at
normal operating pressure at about 140°F (60°C) for 30 minutes to allow the tubing to relax and settle into the tracks. Noise can
occur at this time but will reduce as the tubing settles. If the noise persists, locate the source and apply some silicone
adhesive to the tubing at that location. After the start-up is complete, the finished flooring can be installed.
5A.6 Sample Flooring Installations
Tile/Stone: Roth recommends using a tile underlayment product in all ceramic tile installations. Underlayment should be
secured and seams finished per manufacturer’s instructions. It is also a good idea to use plasticizer additives with the
mastic and grout for more flexibility during operation of the heating system.
Laminate Wood Flooring: Thin laminate flooring may require the use of an underlayment material to provide additional
support above the tubing/grooves. This should be discussed with the flooring contractor during the planning phase.
Carpeting/Vinyl Flooring: Never use untempered hardboard as an underlayment. Underlayment should be stable under
the temperature and humidity conditions expected for your project. Untempered hardboard may swell with humidity.
Hardwood: Nail strips may not be needed if the flooring contractor uses longer nails/staples. This should be discussed
with the flooring contractor prior to installation of the panel. Never use an asphalt impregnated paper, or any impregnated
paper that can produce odors when exposed to heat between the panel and the hardwood.
These are sample installations only!
It is always important to coordinate any radiant heating with the flooring contractor prior to panel installation!
The flooring contractor will then be able to incorporate any special requirements felt needed for the installation.
5A 5
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Roth's success is the result of flexibility in products, targeted investments
and theme oriented solutions. Our growth stems from continuous research
and development of new and innovative products. Manufacturing keys to
success are combinations of know-how, modern production sites and
equipment, latest production technologies, and motivated personnel.
Listed by:
Roth Industries, Inc.
77 Circuit Drive
North Kingstown, RI 02852
Phone: 401-267-9044; Fax: -9048
Roth Canada
1607 rue de l'Industrie
Beloeil, QC J3G 4S5
Phone: 450-464-1329; Fax: -7950
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