Baxi Fires Division 541 Assembly instructions

5118369/02
© Baxi Heating U.K. Limited 2007.
We trust that this guide gives
sufficient details to enable this
appliance to be installed and
maintained satisfactorily. However, if
further information is required, our
Baxi Fires Division Technical
Helpline will be pleased to help.
Telephone [phone] (National
call rates apply in the United
Kingdom).
In the Republic of Ireland
Telephone [phone].
THIS APPLIANCE IS FOR USE WITH
NATURAL GAS (G20).
THIS APPLIANCE IS SUITABLE ONLY
FOR INSTALLATION IN THE UNITED
KINGDOM (GB) AND THE REPUBLIC
OF IRELAND (IE).
INSTALLER: Please leave this guide with the
owner
INSTALLER GUIDE
Model 541
ROOM SEALED RADIANT / CONVECTOR
GAS FIRE
Fitted with one of the following fascia.
Camden, Seattle, Sonnet
or
Ultimate.
(GC No. 32-032-64)

© Baxi Heating U.K. Limited 2007.
All rights reserved. No part of this publication may be reproduced in any material form
(including photocopying), stored in any medium by electronic means (including in any
retrieval system or database) or transmitted, in any form or by any means, whether
electronic, mechanical, recording or otherwise, without the prior written permission of
the copyright owner.
Applications for the copyright owner's permission to reproduce any part of this
publication should be made, giving details of the proposed use, to the following address:
The Company Secretary, Baxi Heating UK Limited, Pentagon House, Sir Frank Whittle
Road, Derby, DE21 4XA.
Warning: Any person who does any unauthorised act in relation to a copyright work
may be liable to criminal prosecution and civil claims for damages.
Baxi Fires Division, Erdington, Birmingham B24 9QP
www.firesandstoves.co.uk
Because our policy is one of constant development and improvement, details may vary slightly from those
given in this publication
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© Baxi Heating U.K. Limited 2007.

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INSTALLER GUIDE
Safety First.
Baxi Fires Division fires are CE Approved and designed to meet the appropriate British
Standards and Safety Marks.
Quality and Excellence.
All Baxi Fires Division fires are manufactured to the highest standards of quality and
excellence and are manufactured under a BS EN ISO 9001 quality system accepted by
the British Standards Institute.
The Highest Standards
Baxi Fires Division is a member of the Society of British Gas Industries which works to
ensure high standards of safety, quality and performance.
Careful Installation
Baxi Fires Division is a CORGI registered company. All our gas fires must be
installed by a competent CORGI Registered Installer in accordance
with our Installer Guide and should not be fitted directly on to
carpet.
© Baxi Heating U.K. Limited 2007.

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© Baxi Heating U.K. Limited 2007.
CONTENTS
Section Heading Page
1. SAFETY 5
2. APPLIANCE DATA 6
3. LIST OF AVAILABLE KITS 7
4. APPLIANCE AND RECESS DIMENSIONS 8
5. GENERAL INSTALLATION REQUIREMENTS 9
6. UNPACKING AND PRELIMINARY CHECKS 15
7. GAS SUPPLY CONNECTION 17
8. WALL PREPARATION 17
8.1 Select appliance position. 17
8.2 Constructing a recessed opening. 17
8.3 Combustible wall materials. 19
8.4 Cutting the flue hole for brick, stone etc. building. 19
8.5 Cutting the flue hole in timber frame buildings. 20
8.6 Prepare appliance fixing holes. 21
9. FLUE AND TERMINAL INSTALLATION 22
9.1 Cutting flue to size. 22
9.2 Fitting to wall. 23
9.3 Fitting the terminal guard. 24
10. GAS CONNECTION 24
11. CERAMIC COALS INSTALLATION 25
12. CERAMIC PEBBLES INSTALLATION 27
13. WINDOW FITTING 29
14. FULL OPERATING CHECKS 29
14.1 Check for leaks. 29
14.2 Check control operation. 29
14.3 Checking inlet pressure. 30
15. FASCIA FITTING 31
16. FINAL REVIEW 32
17. SERVICING & PARTS REPLACEMENT 33
17.1 To remove fascia. 33
17.2 To remove window unit. 34
17.3 To remove the ceramic fuel effect and rear wall. 34
17.4 To remove the complete burner module. 34
17.5 To remove the burner from the burner module. 35
17.6 To remove the injector. 35
17.7 To remove the pilot unit. 35
17.8 To remove the gas valve. 36

1. SAFETY
Installer
Before continuing any further with the installation of this appliance please read the
following guide to manual handling:
!The approximate lifting weight (kg) of this appliance is as below:-
Model Heat Engine Fascia Fire front Combined Weight
inc. ceramics
Camden 12.75 1.31 0.95 15.01
Seattle 12.75 1.31 0.95 15.01
Sonnet 12.75 1.31 3.65* 17.71
Ultimate 12.75 1.31 3.65* 17.71
*This weight is based on the heaviest casting which is Brass. Black or Chrome
castings may be lighter depending upon the method and manufacture and materials
used.
!One person should be sufficient to lift the fire. If for any reason this weight is
considered too heavy then obtain assistance.
!When lifting always keep your back straight. Bend your legs and not your back.
!Avoid twisting at the waist. It is better to reposition your feet.
!Avoid upper body/top heavy bending. Do not lean forward or sideways whilst
handling the fire.
!Always grip with the palm of the hand. Do not use the tips of fingers for support.
!Always keep the fire as close to the body as possible. This will minimise the
cantilever action.
!Use gloves to provide additional grip.
!Always use assistance if required.
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2. APPLIANCE DATA
The appliance data label is located on a plate at the base of the fire. This can be seen by
removing the lower front casting / fire front.
The efficiency of this appliance has been measured as specified in BS EN 613 and the
result is as below :
Model
Efficiency % (Gross)
541 76
The gross calorific value of the fuel has been used for this efficiency calculation. The
test data from which it has been calculated has been certified by Advantica Certification
services (0087). The efficiency value may be used in the UK Government's Standard
Assessment Procedure (SAP) for energy rating of dwellings.
The conversion of net efficiency to gross was achieved by multiplying the net
efficiency by the following conversion factor from Table E3 of SAP 2005, rounding
down to the nearest whole number.
This product uses a fuel effect, a burner compartment rear wall and gaskets
containing Refractory Ceramic Fibres (RCF), which are man-made vitreous
silicate fibres. Excessive exposure to these materials may cause irritation to eyes,
skin and respiratory tract. Consequently, it is important to take care when
handling these articles to ensure that the release of dust is kept to a minimum. To
ensure that the release of fibres from these RCF articles is kept to a minimum,
during installation and servicing we recommend that you use a HEPA filtered
vacuum to remove any dust and soot accumulated in and around the fire before
and after working on the fire. When replacing these articles we recommend that
the replaced items are not broken up, but are sealed within a heavy duty polythene
bag, clearly labelled as RCF waste. RCF waste is classed as a stable, non-reactive
hazardous waste and may be disposed at a landfill licensed to accept such waste.
Protective clothing is not required when handling these articles, but we recommend
you follow the normal hygiene rules of not smoking, eating or drinking in the work
area and always wash your hands before eating or drinking. This appliance does
not contain any component manufactured from asbestos or asbestos related
products.
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Gas Conversion factor from net to gross efficiency
Natural Gas 0.901

3. LIST OF AVAILABLE KITS
Description Part number
!Spacer kit (5 inch) 0595121
!Spacer kit (3 inch) 0595131
!Timber frame Flue Clearance kit. 0583141
This kit includes : -
1 off Insulation for rear of fire.
1 off Flue clearance sleeve.
1 off Drip collar.
1 off External wall plate.
Under no circumstances is the fire to be recessed into Timber frame constructions. For
timber framed installations see section 8.
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© Baxi Heating U.K. Limited 2007.
Gas Natural
Inlet pressure 20mbar
Input - Max. (Gross) 3.65kW (12,454 Btu/h)
Input - Min. (Gross) 1.5kW (5,118 Btu/h)
Inlet pressure (Cold) 20.0 ± 1.0mbar (8.0 ± 0.4in w.g.)
Gas connection 8mm pipe
Main burner Simplex aerated
Burner injector Bray Cat. 92 size 280
Pilot unit
Left side of firebox. Combined pilot jet, thermocouple sensor
and electrode. SIT ref. NGOP9706
Ignition Integral piezo on gas valve.
Aeration adjustment None required
Controls
Manual pilot and main burner off/on control (Right control).
Separate variable manual control for main burner (Left
control). Fitted with flame supervision device and integral
piezo igniter.
Walls Minimum 102mm (4in.) thick.
Maximum 660mm (26in.) thick.

4. APPLIANCE AND RECESS DIMENSIONS
This appliance must not be recessed into a combustible wall.
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Figure 1. Appliance dimensions and clearances (Fire dimensions are subject to
manufacturing deviation) Fascia may differ from that shown
Key Description
Model
Ultimate &
Sonnet
Camden &
Seattle
AAppliance height (mm) 607 607
BAppliance width (mm) 487 487
CAppliance depth into room (mm) 140 172
DMinimum mandatory clearance to combustible surfaces projecting beyond the front of appliance
(mm). 102 102
ERecommended clearance to non-combustible
surfaces for access purposes (mm). 51 51

5. GENERAL INSTALLATION REQUIREMENTS
5.1 The appliance can be installed into the following :-
a)
A minimum 4.5in rebate surround or Baxi Fires Division 5in. spacer kit Part No
0595121. Where either of these are mounted to a combustible wall make sure that there
is no combustible material or combustible cladding in the area indicated on the wall
fixing template.
b)
A 2in rebate surround in conjunction with the Baxi Fires Division 3in. spacer kit
Part No 0595131. Where the surround is mounted to a combustible wall make sure that
there is no combustible material or combustible cladding in the area indicated on the
wall-fixing template.
c)
Recessed into a builder’s opening or cavity of a non- combustible wall. The cavity
can be elevated. The minimum cavity size is shown in figure 2. A lintel may be required
above the recess opening. If in doubt seek expert building advice. Lintel construction
details are given in section 8 of this guide.
This appliance must not be recessed into a
combustible wall
5.2
Note that soft wall coverings (e.g. embossed vinyl etc.) are easily affected by heat.
They may therefore, scorch or become discoloured when close to a heating appliance.
Please bear this in mind when installing.
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Figure 2. Recess and flue hole dimensions

5.3
Installation to a timber-framed building should be in accordance with the relevant
sections of The Institute of Gas Engineers publication IGE/UP/7 “Gas installations in
timber frame buildings”.
Please note that advice should be sought before installing in a timber frame building
since the alterations required may nullify any NHBC cover relating to the property. If in
doubt, guidance should be requested from your local authority planning or building
department.
Under no circumstances is the fire to be recessed into Timber frame constructions
.
For timber framed installations see section 8.
5.4 The installation must be in accordance with this guide.
For the user’s protection, in the United Kingdom it is the law that all gas appliances are
installed by competent persons in accordance with the current edition of the Gas Safety
(Installation and Use) Regulations. Failure to install the appliance correctly could lead
to prosecution. The Council for the Registration of Gas Installers (CORGI) requires its
members to work to recognised standards.
In the United Kingdom the installation must also be in accordance with:
All the relevant parts of local regulations.
The current edition of the Building Regulations issued by the Department of the
Environment and the Welsh Office, the Building Standards (Scotland) (Consolidation)
Regulations issued by the Scottish Development Department or the Building
Regulations (Northern Ireland) issued by the Department of the Environment for
Northern Ireland.
All relevant codes of practice.
The relevant parts of the current editions of the following British Standards:-
BS 5440 Part 1- Installation of flues
BS 5871 Part 1- Installation - Gas fires
BS 6891-
Installation of low pressure gas pipework of up to 35mm (R1 ¼) in
domestic premises (2nd family gas) - specification.
In the republic of Ireland the installation must also conform to:
a)
The relevant parts of the current edition of IS 813 “Domestic Gas Installations”
b) All applicable national and local rules in force.
Where no specific instructions are given, reference should be made to the relevant
British Standard Code of Practice.
5.5
A minimum clearance of 51mm should be maintained at each side of the fire for
servicing access.
Any combustible side wall or other combustible projection must be at least 102mm
clear from direct exposure to the radiant surface of the appliance unless suitably
protected.
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5.6
The minimum height from the base of the fire to the underside of any shelf made
from wood or other combustible materials is as follows:-
•For a shelf up to 150mm deep
Minimum height = 780mm.
•For a shelf deeper than 150mm
780mm + 12.5mm for every 25mm depth over 150mm.
(See graph 1)
There is no restriction on the position or depth of non-combustible projections for all
normal installations. Installation into an unusually tightly restricted recess, however,
could cause the temperature of the appliance surfaces to become unacceptably high.
5.7 It is advisable that combustible fabrics such as curtains are not fitted above the
fire. If, however, this is unavoidable, the extreme bottom edge of the fabric must be at
least 780mm above the top surface of the hearth or finished floor.
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Graph 1. Combustible shelf clearances.

5.8
For installations that are elevated and recessed.
Models fitted with a fire front or fire front casting set shall have a hearth / plinth
fitted. The minimum depth of the hearth / plinth from the fixing plane of the fire is
recommended as below. Model Depth (mm)
Sonnet & Ultimate 160
Camden & Seattle 192
On models with fire front casting sets this is necessary to support the ‘ash pan’ casting.
The hearth / plinth will minimise the visibility of the heat engine components.
For installations that are not elevated.
This appliance does not require a non-combustible hearth. It can be installed on any
hard surface. This surface should be level and sufficiently flat to enable the bottom of
the fascia / fire front / castings to be aligned horizontally. Any unevenness (Uneven
tiles, Cotswold stone etc.) should be rectified.
The appliance must not stand on carpet or other textured surfaces which may
interfere with the flow of convection air through the bottom of the appliance.
The
floor surface that must be free of carpets, rugs or other fabric coverings should be at
least as wide as the appliance fascia and project forward at least 300mm from the rear
wall. In order to prevent carpet etc. being placed within this area, we strongly
recommend that the appliance is installed on a raised hearth or that the periphery of this
area is bordered by a fender.
5.9 The appliance can be fitted to a purpose made proprietary class “O” 150°C
surround. We recommend that the surround manufacturer is contacted to confirm
compatibility.
5.10
A hole 152mm (6in) dia. is required through the wall for the flue unit. The height
of the hole centre is shown in figure 2 and on the wall-fixing template supplied with the
appliance.
5.11 This appliance can be installed in any room which contains a bath, shower or
where steam is regularly present.
5.12 A concealed gas supply connection can be made through the rear left panel.
Visible front connection can be from the left or right side.
5.13
No special ventilation bricks or vents into the room containing the appliance are
required.
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5.14 A terminal guard is supplied with this appliance.
In England and Wales the Building Regulations
require a terminal guard to be fitted if the
terminal could come into contact with people
near the building or be subject to damage.
In the republic of Ireland the installation must
also conform to the relevant parts of the current
edition of IS 813 “Domestic Gas Installations”
We recommend that the guard is fitted where
contact with or damage to the terminal is
possible even if regulations do not demand it.
5.15 If the fire is to be fitted against a wall with
combustible cladding, the cladding must be
removed from the area shown in figure 3.
5.16
Minimum allowable distances from the terminal are shown in figures 4a and 4b.
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Figure 3. Area to be free of
combustible cladding.

*In addition, the terminal should not be nearer than 300mm to an opening in the
building fabric formed for the purpose of accommodating a built-in element such as a
window frame or door frame (See figure 4b).
** The reference to external corners does not apply to building protrusions not
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Key Terminal position Minimum distance
(mm)
A* Directly below an opening, air brick, opening window etc. 300mm
B* Above an opening, air brick, opening window etc. 300mm
C* Horizontally to an opening, air brick, opening window etc. 300mm
DBelow gutters, soil pipes or drain pipes. 300mm
EBelow eaves. 300mm
FBelow balconies or car port roof. 600mm
GFrom a vertical drain pipe or soil pipe. 300mm
H** From an internal or external corner. 600mm
IAbove ground, roof or balcony level. 300mm
JFrom a surface facing the terminal. 600mm
KFrom a terminal facing the terminal. 600mm
LFrom an opening in a car port (e.g. door, window) into dwelling. 1200mm
MVertically from a terminal on the same wall. 1500mm
NHorizontally from a terminal on the same wall. 300mm
Figure 4a.

exceeding 450mm, such as disused chimneys on external walls.
6. UNPACKING AND PRELIMINARY CHECKS
6.1 Unpacking.
1 Main fire assembly with fascia.
1 Ceramic fuel effect (Packed in the fire).
1 Nut & olive for 8mm inlet pipe.
1 Fire front / fire front casting set.
1 Flue unit.
1 Wall fixing template.
2 Fire retaining cables.
2 Eyebolts.
2 Fibre wall plugs.
2 No 6 self tapping screws.
8 Woodscrews.
8 Plastic wall plugs.
1 Length of flue sealing tape.
1 Literature pack.
1 Terminal guard (supplied flat).
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Figure 4b.

6.2 Appliance disassembly.
Fascia removal (See figure 5).
!Remove the two screws securing the bottom of the
fascia to the sides of the convection box.
!Raise the fascia to allow the retaining lugs at the top to
clear the slots in the convection box hood and then lift
clear.
!Place the fascia in a safe place
away from your immediate work
area.
Window and ceramic fuel effect
removal.
!Unscrew and remove the three
spring loaded window fixing screws
and washers from the base of the
window frame (See figure 6). Keep
the screws and washers in a safe
place.
!Gently swing the base of the
window frame forward while lifting
the frame upwards. The window
should lift clear of the fire. Put the window in a safe
place away from your immediate work area.
!Carefully remove the ceramic fuel effect in its
packaging. The ceramic fuel effect base is a single
piece. The individual ceramic pieces are packed
separately. Put them in a safe place.
6.3 Preliminary checks.
Check ignition spark (See figure 7).
The pilot burner and electrode unit is at the left front
corner of the burner.
Push in the right hand control knob and turn
anticlockwise through the ignition position marked
and up to the pilot position marked .
A spark should flash across from the pilot electrode to the pilot burner hood. If there is
no spark, check that the spark gap is as shown.
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Figure 7. Ignition
Figure 6. Window
removal
Figure 5. Fascia removal

7. GAS SUPPLY CONNECTION
A nut & olive are provided for an 8mm pipe inlet connection to the inlet ‘T’ connector
at the bottom front of the appliance. This can be rotated to allow a connection from any
direction and includes a valve for isolating the gas supply.
The supply pipe must be rigid material. Flexible pipe must not be used.
Concealed supply pipe connecting from rear of the appliance.
Before the appliance is installed it will be necessary to extend the supply line so that it
will project through the sealed opening at the back of the fire case and run to the inlet
‘T’ connector at the front.
Make sure that the supply line run up to the rear opening is kept away from the area that
will be taken by the appliance case when it is installed.
Note that when fitted the centre of the appliance inlet ‘T’ connector is 25mm above the
floor.
Cut a slit in the seal at the back of the appliance case. The seal must envelop the pipe.
Do not slit the seal unless the supply pipe is to pass through it.
Cap the open end of any supply pipe installed before the wall is drilled to prevent
any debris or dust etc. entering the pipe.
8. WALL PREPARATION
8.1 Select appliance position.
The flue must be installed so that it is at right angles to the back panel of the fire all
round the flue circumference.
For timber framed buildings make sure that the flue opening will be between studs.
When being recessed into a non-combustible wall or builders opening the fire itself
should be fitted vertically against a flat wall. Where this is difficult to achieve due to
building inaccuracies care should be taken to ensure that the back of the fire is not
stressed in any way due to distortion of the appliance when tightening the fixing screws.
Where necessary, non-combustible packing pieces should be used to provide a
satisfactory fixing surface.
8.2 Constructing a recessed opening.
Under no circumstances is the fire to be recessed into timber frame constructions
or any other combustible wall.
The recess in the wall for the appliance should be within the sizes shown in figure 2.
The bottom of the recess should be at the same level as the finished floor in front of the
appliance.
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A lintel may be required above the recess for the convection box. If in doubt, seek
expert building advice before commencing to cut the recess.
8.2.1 Fitting a lintel.
Whenever a lintel is required to
support the recess in the inner leaf
of a brick/blockwork building,
follow the method outlined below
(See figure 8).
!The lintel should be either steel
(Catnic) or reinforced precast
concrete. It should be 750mm
long x 75mm deep x inner leaf
thickness.
!The opening should be, as near
as possible, centrally below a joint
in the inner leaf block.
!Cut out the opening for the
lintel.
!Where cutting through masonry, drill pilot holes and then cut out the slot using a
mechanical cutter. This will minimise damage to the surrounding structure.
!
Insert the lintel. Bed the lintel on mortar. Don’t dry bed. Slate pin to ensure the lintel
and structure above is secure and safe.
!
Make the opening below the lintel by removing the masonry and clearing debris. If
the cavity has loose fill (e.g. granular) insulation material, pack the edges of the opening
with Rockwool as you proceed to hold back the insulating material.
8.2.2 Preparing a wall cavity.
!
The wall cavity must not be bridged other than by the flue unit. The appliance case
must not project into the cavity between the inner and outer walls by more than 10mm.
!
The cavity should be sealed where the opening has been cut. We recommend filling
fully across the cavity with Rockwool or equivalent to at least 100mm above and each
side of the recess opening (See figure 9).
!An alternative to rockwool above
the opening is to seal across the top of the cavity
with superlux board or equivalent. The board should slope downward to the back so that
any moisture will be channelled to the outside (See figure 9).
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Figure 8. Lintel installation

8.3 Combustible wall materials.
!For brick or other non-combustible wall constructions, be sure to remove any
combustible wall cladding material from the area shown in figure 2.
!For Timber frame buildings,
the back surface of the appliance case must be separated
from the timber frame by 25mm of non-combustible material. This can consist of the
usual 12.5mm thick plasterboard plus a 12.5mm thick sheet of non-combustible
insulating material (e.g. fibre cement board). As an option, a pre-cut insulating sheet is
available from your appliance supplier or direct from Baxi Fires Division – Ask for
Baxi Fires Division part no. 0591221. The insulating sheet can be used to seal the
annular gap between the flue unit and the inner leaf sleeve (See section 8.5). Do not
permanently fix the insulating sheet to the wall at this stage (See section 9.2).
8.4 Cutting the flue hole for brick, stone etc. building.
Cut the hole for the flue unit. Make sure that it is straight and level. Though a hammer
and chisel can be used, using a core drill is by far the quickest and simplest method for
normal brickwork.
!
Before cutting the hole in the wall make sure that the height to the top surface of the
finished floor or hearth is known. The height from this surface to the flue hole centre is
shown in figure 2. The terminal position must also comply with the location
requirements given in section 5.16.
!Place dust sheets on the floor and over any furnishings etc.
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Figure 9.

!
Place the template against the wall. Make sure that the centre of the flue hole is as
shown in figure 2.
!
Pierce the template at the centre of the screw fixing holes and the flue hole and mark
the positions on the wall. Remove the template.
8.4.1 Core drilling.
!Drill a pilot hole through the wall. Inspect the hole to ensure that it is in the
brickwork and not in mortar. If it is in mortar, it is advisable to reposition the hole
approximately 25mm away - Make sure that the minimum side clearances and height
are complied with. Remember to reposition the screw fixing holes.
!
Drill the flue hole with a 152mm (6in) core drill. Where practical, it is recommended
that the hole is drilled from inside the building to about half the wall depth with the
remainder drilled from outside. This ensures that the edges of the hole are clean on both
sides.
8.4.2 Hammer and chisel cutting.
!
Mark a 152mm (6in) diameter circle for the flue hole. Chisel out the area marked.
!It may be necessary to make good both the internal and external wall faces. To
achieve a neat finish and to make any future removal of the flue unit easier, it is
recommended that a cardboard cylinder is formed around the flue unit and inserted in
the hole while making good. Remove the cardboard cylinder after making good.
8.4.3 Leaving a hole for a building under construction.
!It will be convenient to use a non-corrosive metal tube 160mm diameter built into
the wall at the correct position for the flue unit.
8.5 Cutting the flue hole in timber frame buildings.
Drill the pilot hole and hole in outer wall as section 8.4.
!
Since the flue will pass through combustible material in the inner leaf of the wall, a
non-combustible sleeve 203mm (8in.) diameter will be required round the flue (See
figure 10).
!
Cut a hole through the inner leaf to accommodate a non-combustible sleeve 203mm
(8in.) outside diameter. To minimise the effect of breaking through the vapour control
layer (VCL), if possible, cut the hole approximately 10mm undersize so that the sleeve
will be forced through the layer. A recommended technique for cutting the inner leaf is
shown in figure 10.
!
Fit the non-combustible sleeve to the inner leaf. The sleeve must extend to be at least
flush with the breather membrane/timber sheathing but must not protrude more than
10mm into the cavity.
!
The annular gap between the flue unit and the sleeve must be sealed to prevent air
heat and moisture passing along it. The 12.5mm insulating sheet (See section 8.3) can
be used for this. Do not permanently fix the insulating sheet to the wall at this stage
(See section 9.2).
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