1. home and garden
2. bed and bath
3. bathroom

11 | 2008
A subfloor system and an underfloor heating system –
together a complete solution for projects
involving construction, structural alterations
and renovation work
Granab Subfloor System
The best features are always out of sight
The subfloor system
The underfloor heating system
The combination
Granab manufactures subfloor systems
for residential properties, offices, schools
and public buildings. Steel floor joists
with damping elements for effective
impact sound and airborne sound insulation. The Granab Subfloor System
is patented and type-approved with
regard to its sound-damping properties,
dynamic loads, strength and resilience.
More than two million square metres of
the Granab Subfloor System have been
installed as part of various projects.
Uponor manufactures underfloor heating systems for all types of building.
Underfloor heating systems are supplied complete with room regulation
for an optimum indoor climate. Since
1972, Uponor has manufactured over
1,500,000,000 metres of PEX piping.
Much of that has been supplied for underfloor heating systems installed all over the
world. Uponor Underfloor Heating Systems feature jointless installation, which
ensures a more reliable system.
The two systems have been developed to
work effortlessly together. This combination guarantees you an optimum subfloor system with safe and comfortable
underfloor heating. Efficient installation
reduces the build time and helps to keep
the overall cost down.
Our system enables you to walk barefoot on
a warm bathroom floor
The system does not restrict the architecture
or furnishing
You can choose a surface finish that adds to
both the function and design
2 Granab Subfloor System and Uponor Underfloor Heating System
Uponor Underfloor Heating Systems
Nothing warms as well as genuine underfloor heating
Benefits of a subfloor system
• Effective impact sound damping and
airborne sound insulation
• Dry installation method. Can be installed directly on untreated concrete floors
without the need for wet screeding
• The system has an environmental
friendly product declaration
• Consists entirely of inorganic material
and is not affected by moisture or
temperature fluctuations
• Makes floors more comfortable for
a better living and working environment and ensures a creak-free floor
• Type-approved
• Underfloor heating systems are
covered by a building product
declaration
• The underfloor heating pipes
(Wirsbo-pePEX pipes) are made of
polyethylene and are converted to
water on combustion
• Unlimited choice of heat source
• Smaller electrical installations for
wireless room regulation
• No impact on the position of windows and other architectural features
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Common properties
• Comfortable environmentally friendly
floors
• Flexible pipe-laying and electrical
wiring that is separate from the building design
• Designed and tested as a total concept
• Faster, more flexible and simpler
construction method
• Unlimited choice of flooring/surface
• Easy to work with in the event of
future structural alterations or renovation work
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• No impact on furnishing
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Benefits of an underfloor heating
system
• Contributes to a healthy home and
environmentally-friendly residential properties, schools and public buildings
• A well-thought out and efficient
construction process.
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Granab Subfloor System and Uponor Underfloor Heating System 3
The best of both worlds
A complete subfloor and underfloor heating system
4 Granab Subfloor System and Uponor Underfloor Heating System
To date, Granab’s patented and typeapproved floor joists systems have
been installed in more than two million square metres of floor in residential properties, offices, schools, shops
and public buildings.
The Granab Subfloor System is typeapproved. It has been tested and certified
by the Swedish National Testing and
Research Institute (SP) with regard to
its sound-damping properties, dynamic
loads, strength and resilience. The stable
galvanised steel joists are extremely strong
and are not affected by moisture or temperature fluctuations. Other incorporated
components are made of moisture-resistant materials. The subfloor system’s inbuilt impact-damping properties ensure
comfortable and silent floors.
A lot of people are looking to reduce
their electricity consumption for heating
and are switching instead to district heating or another energy source. Uponor
Underfloor Heating Systems can be
connected to all types of heat source.
It is not uncommon for houses under
construction or being renovated to be
fitted with underfloor heating.
By letting the warmth rise from the
floor, heat is distributed evenly throughout the room. Optimum comfort is
achieved using a room thermostat and
individual regulation of all rooms. With
warm floors, the room temperature can
be reduced a few degrees. This benefits
both your wallet and your wellbeing, as
the feet are the body’s own thermostat.
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Cellular floor
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Granab Subfloor System
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Uponor UFH Chip board
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Uponor Heat emission plates
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Uponor Underfloor heating pipes
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Plastic film
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Parquet flooring
Granab Subfloor System and Uponor Underfloor Heating System 5
Decorate any way you want
Open up to creative architecture
The combination of a Granab Subfloor System and Uponor Underfloor
Heating System does not simply mean
being able to climb out of bed in the
morning without the soles of your feet
encountering a freezing cold floor.
A silent, warm and comfortable floor
also encourages greater freedom when
it comes to decorating and furnishing
your home.
Underfloor heating allows you to use
every square metre of floor surface. And
think how easy it will be to paint and
wallpaper the walls. No radiators or pipes
that collect dust to ruin your decorating
dreams. If you want to move the sofa
or your favourite armchair under the
window, then why not? This form of
heating works well no matter how the
furniture is arranged.
Being able to choose whichever surface finish
you want encourages creative architecture
6 Granab Subfloor System and Uponor Underfloor Heating System
Quick and easy installation
Complete documentation
The customer, installation engineer and builder
all benefit financially
Both the Granab Subfloor System and
Uponor Underfloor Heating System
are well documented. You can download product information and installation instructions from our websites,
www.granab.se and www.uponor.se.
Two laying options
Uponor Underfloor Heating Systems
can be combined with the Granab
Subfloor System using two different
laying methods. You can choose
between laying Uponor UFH Chip
boards, grooved 17, over the floor joists
and using Uponor UFH Cassette 20
with insulation between the floor joists,
system 7000.
Uponor UFH Chip board, grooved 17
Grooved UFH Chip board is glued
and screwed securely to the joists. Heat
emission plates to distribute the heat are
laid in the grooves and then underfloor
heating pipes are inserted into the plates.
Flooring may comprise, for example,
15 mm parquet flooring, which is installed on top of plastic film. Follow the floor
manufacturer’s instructions carefully.
Uponor UFH Cassette 20 with
insulation
Uponor UFH Cassette 20 with
insulation
Underfloor heating installed in an Uponor
UFH Cassette 20 with insulation that is
laid along the floor joists. The cassettes
rest on Uponor Cassett support. The
standard distance between joists is c/c 600
mm. The flooring may be, for example,
22 mm. Follow the floor manufacturer’s
instructions carefully.
Plastic matting may also be laid over the
underfloor heating. First lay flooring
chipboard across the floor joists and then
lay the plastic matting over that. Another
alternative may be to apply floor plaster
over the particle board and then lay tiles in
the plaster. Follow the floor manufacturer’s
instructions carefully.
Granab Subfloor System and Uponor Underfloor Heating System 7
Uponor UFH Chip board, grooved 17
Procedure for installation
First the surfaces where the underfloor
heating and subfloor systems are to be
installed must be cleaned and made
accessible.
The manifold cabinet should be positioned as shown in the drawing.
Secure the conduit pipes as required, with
a distance of max 600 mm between the
clips. The last clamping ring before the
connection point must be no closer than
600 mm. The conduit pipe must stop
approx. 150 mm above the finished floor.
Install the feed lines from the heat source
to the underfloor heating manifold. The
supply line is fitted to the upper manifold and the return line to the lower
one. Each manifold is equipped with an
balancing valve.
The feed lines must be secured sufficiently.
Any excess adhesive should be wiped
away, with particular attention being
paid to grooves where underfloor heating
plates or pipes will be fitted later.
Holes (diameter approx. 65 mm) must
be drilled in the Uponor UFH Chip
board for the underfloor heating pipes,
supply lines. It may be helpful to cut an
extra hole in line with the first in order
to facilitate the use of rising pipes. The
position of the hole is shown in the
underfloor heating drawing. It should
be positioned where the loop field starts
or ends.
Electrical wiring and pipes are drawn flexibly
under the finished floor
The subfloor system should now be
installed according to Granab’s installation instructions.
The protective pipe is secured to the
underlying surface using pipe clips
Install conduit pipe from the manifold
cabinet to each loop and connection
point. “Connection point” means the
place where the underfloor heating pipe
is to come up through the Uponor UFH
Chip board, grooved 17 (see underfloor
heating drawing).
8 Granab Subfloor System and Uponor Underfloor Heating System
If the walls are to be plastered, make sure
that the gypsum board beneath the manifold cabinet does not reach right down
to the basefloor. The board must stop
level with the upper edge of the Granab
floor joist.
Fit the Uponor UFH Chip board over
the subfloor system, following Granab’s
installation instructions for flooring
chipboard. The short sides can be joined
as you go along without the joint having
to be supported by a floor joist. All joints
must be glued in accordance with the
instructions.
The underfloor heating pipes are drawn
through conduit pipes to every room with
underfloor heating
Make sure that pipes passing through the
chipboard have a soft bend so that the
pipe will not press against the parquet
or floor surface that will be laid over the
Uponor UFH Chip board.
Uponor UFH Chip board, grooved 17
Installation over floor joists
The turning grooves for the underfloor
heating pipes must be milled as close to
the opposite wall as possible. Check also
that the depth of the groove is sufficient.
Normally, the depth of the groove corresponds to the maximum depth of the
Uponor Milling Machine.
After vacuuming, the floor surface must
be covered with Uponor Heat emission
plates. All straight grooves are equipped
with plates. The distance between the
plates must be 10-100 mm lengthwise.
Once all the loops have been filled and
tested for tightness, each underfloor
heating loop can be balanced in accordance with Uponor’s underfloor heating
calculation
The underfloor heating pipes can then
be installed. Remember to connect the
supply and return lines to the correct
part of the underfloor heating manifold.
Check also that the pipes do not come
up and away from the Uponor UFH
Chip boards.
It is important that the floor surface layer
or protective flooring be fitted as soon as
possible after the system has been tested
for tightness.
All underfloor heating loops must
be marked at the underfloor heating
manifold in accordance with Uponor’s
underfloor heating drawing with room
designation and/or loop number.
The protective pipes containing the underfloor
heating pipes are drawn up and connected to
the underfloor heating manifold
Before installing underfloor heating
plates the floor surface must be vacuumcleaned carefully.
NB! The Uponor UFH Chip board is not
intended for use as a working floor.
Follow Granab’s instructions for installing a floor surface layer.
Once installation is complete, install and
function test room regulation.
Before the floor is covered, the underfloor heating system must be tested for
tightness in accordance with Uponor’s
instructions.
This testing must also be documented in
a separate document.
Granab Subfloor System and Uponor Underfloor Heating System 9
Uponor UFH Cassette 20 with insulation
Procedure for installation
Work begins with the surfaces where the
underfloor heating and subfloor systems
are to be installed being cleaned and
made accessible.
Then install the manifold cabinet with
the manifold positioned as shown in
the drawing.
In between the joists of the subfloor
system, fixing plates for the UFH cassettes are fitted using the holes beside the
joists. Three fixing plates must be fitted
for each cassette.
Install the feed lines from the heat source
to the underfloor heating manifold. The
supply line is fitted to the upper manifold and the return line to the lower
one. Each manifold is equipped with an
balancing valve.
For smaller cross bar compartments,
cut fixing plates and underfloor heating
cassettes to fit
The feed lines must be secured sufficiently.
Max 800 mm distance between clips.
Install conduit pipe from the manifold
cabinet to each loop and connection
point. “Connection point” means the
place where the underfloor heating
pipe is to come up near the Uponor
UFH Cassette (see underfloor heating
drawing).
Secure the conduit pipes as required,
though with a distance of max 600 mm
between the clips. The last clamping ring
before the connection point must be at
least 600 mm away. The conduit pipe
must stop approx. 150 mm above the
finished floor.
The subfloor system 7000 should now
be installed according to Granab’s installation instructions
10 Granab Subfloor System and Uponor Underfloor Heating System
The underfloor heating cassettes are laid on
top of the cassette support
For passage between the subfloor bays
there must be a gap of approx. 50 mm
between the longitudinal and the transverse joist.
If a joist intervall has a c-distance less than
600 mm, the fixing plates should be split
and laid as overlapping. Both ends should
be fastened together using pop rivets, tape
or equivalent.
Cover the floor surface with Uponor
UFH cassettes. The distance between
the cassettes must be 10-100 mm lengthwise. The cassette stops 300 mm from
the transverse floor joist.
If the walls are to be plastered, make
sure that the gypsum board beneath the
manifold cabinet does not reach right
down to the floor. The board must stop
level with the upper edge of the Granab
floor joist.
Vacuum-clean the Uponor UFH Cassettes, particularly in the grooves, before
beginning to lay the underfloor heating
pipes.
Once the subfloor system has been installed, installation of the underfloor heating
cassettes can begin.
Install the underfloor heating pipes in
accordance with the underfloor heating
drawing produced and connect them
to the installed underfloor heating
manifold.
Uponor UFH Cassette 20 with insulation
Installation between floor joists
Remember to connect the supply and
return lines to the correct part of the
underfloor heating manifold. Check also
that the pipes are not coming loose and
touching parts of the joists.
All underfloor heating loops must
be marked at the underfloor heating
manifold in accordance with Uponor’s
underfloor heating drawing with loop
number and/or room designation.
Rising pipes must have a soft bend so
that they do not press against the parquet
or flooring particle board that will be laid
over the joist floor.
Before the floor is covered, the underfloor heating system must be tested for
tightness in accordance with Uponor’s
instructions. This testing must also be
documented in a separate document.
Follow Granab’s instructions for installing a floor surface layer.
Once installation is complete, install and
function test room regulation.
Once all the loops have been filled and
tested for leaks, each underfloor heating
loop can be adjusted in accordance with
Uponor’s underfloor heating calculation
It is important that the floor surface
layer or protective flooring be installed
as soon as possible after the system has
been tested for tightness.
A finished underfloor heating system must
be tightness tested before the surface layer
is installed
An underfloor heating system allows
almost complete freedom when it comes to
furnishing
NB! The underfloor heating cassettes are
not intended for use as a working floor
Granab Subfloor System and Uponor Underfloor Heating System 11
1526S 07-03-3-GB Production: Uponor AB
Safe and simple planning
Let us do it for you
When you choose a subfloor system from Granab, we will help
to draw in the subfloor system on your plans. We will produce
laying plans showing detailed measurements and the positions
of all incorporated joists. The joists are cut according to the
laying plan, and all incorporated adjustment units with damping
elements are pre-installed at the factory.
If you choose an underfloor heating system from Uponor, we will
also draw in the underfloor heating loops and the positions of
manifolds and thermostats on the plans. You will receive a drawing
showing both the subfloor and underfloor heating systems. We
will also perform a pressure drop calculation for the underfloor
heating system, making the system easier to balance.
Could it be any simpler? Please contact us for more information,
planning or an estimate.
Bygg- och Miljöteknik Granab AB
Box 172
SE-447 24 Vårgårda
Tel +46 (0)322-66 76 50
Fax +46 (0)322-66 76 55
www.granab.se
Uponor AB
Uponor VVS
Tel +46 (0)223-380 00
Box 2
Fax +46 (0)223-387 10
SE-721 03 Västerås
www.uponor.se In keeping with our policy of continuous improvement and development, Uponor
reserves the right to change specifications without prior notice.
The latest information is always available on our websites.