Forest Xtend 2.5 Manual
XTEND 2.5 GUIDE BOOK
(2.5x2.5M)
Missing something?
Call our aftersales team on
0333 777 7089
Need more information?
Call our technical team on
0333 321 3142
Visit our website for more
information
www.forestgarden.co.uk
Forest Garden, Oak Drive, Hartlebury Trading Estate, Hartlebury, Worcestershire, DY10 4JB
Thank you for purchasing your Xtend Garden Building from Forest Garden. Simply follow these step by step
instructions and our top tips for a straightforward assembly. If you have any questions or need advice, our
friendly team is here to help.
ISSUE: 0221
FIXING PACK CODE: XTENDFP
Please keep plastic bags and small parts away from children.
‘Fixtures & Fittings’ Box Contents
All of our Xtend garden buildings are constructed in the same way. They simply come with slightly different
components depending on the size you have purchased. Don’t worry if your ‘xtures and ttings’ box
contains many extra xings at the end of the build (you haven’t missed a bit!). We have sent you a generic
xtures and ttings box to suit the Xtend garden building collection.
6.7 x 150mm Screws
QTY: 40
6.7 x 125mm Screws
QTY: 90
7.5 x 112mm Screws
QTY: 35
5 x 80mm Screws
QTY: 280
4 x 50mm Screws
QTY: 220
4 x 35mm Screws
QTY: 430
10 x 10mm Staples
QTY: 1000
750ml B3 Fill & Fix
Expanding Foam
QTY: 3
‘Star’ Drill Bit
QTY: 1
310ml Translucent
Silicone
QTY: 1
1-6mm Glazing Packers
QTY: 10 of Each
1.6 x 30mm Panel Pins
QTY: 155
300ml Anthracite Grey
Silicone (7016)
QTY: 1
1
2
3
4
5
6
7
8
9
10
11
12
13
1
2
3
4
5
6
7
8
12mm Wood Plugs
QTY: 100 14
10
11
12
13
14
Drill & 2-6.5mm
Drill Bits
Tools Required
Assembly is relatively straightforward if you follow these step by step instructions. All screw holes should
be pre-drilled to avoid splitting the timber.
We recommend using the following tools (not supplied):
Rubber Mallet /
Hammer
Tape Measure Spirit Level Ladder
Foam Gun Sharp Knife
(Stanley Knife)
Hand Saw/Hand
Circular Saw
Heavy Duty
Staple Gun
Sander
REMINDER
Always pre-drill before
screwing.
IMPORTANT
Assembly requires 2+ adults
& 2+ person lifts at all times.
Please keep plastic bags and small parts away from children.
2
Health and Safety
We strongly recommend that PPE (Personal Protective Equipment) is used throughout your Xtend garden
building assembly to ensure you are protected from any potential health and safety risks. Do not exempt
yourself from wearing PPE even if the job ‘only takes a few minutes.’ Use any guidance stated on the
supplied xings and where you feel it is applicable to use PPE as part of your step by step assembly.
Chemical Information
Due to the high quantity of products we have supplied and recommended to use, we strongly
recommend checking all the chemical information, application, shelf-life, storage, cautions and health
and safety sections which will be listed on the back of each product. For further information, these
branded products can be found online where they will have PDF technical sheets to access. If you have any
further concerns or queries, you can contact the suppliers/manufacturers for extra information.
Do not leave empty containers where residue could be harmful to children, animals or the
environment. Replace lids and move any containers to a central disposal point in accordance with local
regulations. Do not pierce cans. In the event of a spillage, remove all sources of ignition, ventilate the
area, and remove people from conned areas. Spillages should be mopped up immediately with an inert
absorbent material such as sand.
B3 Fill & Fix Expanding Foam Extra Information
B3 Fill & Fix Expanding Foam is just like many other types of expanding foam. It is vital that you know how
to set up and use the expanding foam correctly for an easy application during your assembly. As this is a
generic xing pack and we do not supply any tools, the expanding foam does require a foam gun.
Preparation & Application
Before applying your expanding foam, you need to ensure that the surfaces to
be bonded are rm, clean, dry and free from dust, grease or contaminants that
may hinder effective adhesion. All of the construction components that will be
in contact with the expanding foam must be properly prepared as described
above. It is advisable to have a can of ‘Foam Cleaner’ to hand.
Ensure your foam gun is set up correctly and shake your expanding foam can
vigorously prior to use. Use the gun with the can uppermost and as close to
vertical as possible. Otherwise, you will have poor foam discharge during your
application. Also, take care not to overll joints when applying to your base kit
panels. Fresh foam spills can be removed straightaway or, if left to harden, they
can be removed with a scraper or knife.
Cleaning The Nozzle
As the expanding foam will be in use over the 2 days of the Xtend garden building assembly, it is best
to keep the nozzle of your foam gun clean enough to prevent any blocking of the product when next
coming to use it. Excess foam can be removed whilst still wet using ‘Bond It Foam Cleaner’ or ‘Bond It
Multi-wipes.’ Once the expanding foam has cured, it can only be removed by scraper. Store and transport
upright in cool, dry conditions between 5 and 25°C. 3
Before You Start
Assembly Guide
Do not attempt assembly of your building until you have checked the ‘component list’ at the back of this guide book
to ensure all parts are present. You must notify our Technical Helpline of any missing or damaged components within
14 days of receipt of the building.
In the unlikely event of any problems, issues or for any questions, please contact our Technical Helpline on
0333 777 7089. Before you call, please make a note of any parts that may be damaged or missing.
Please refer to your xtures and ttings box for supplied screws, expanding foam and nails. Tools for erecting and
preserving the building are not supplied as part of the purchase and are listed on page 6 for a guide.
Guarantees are limited to the replacement of incorrect or damaged materials. Your statutory rights
are unaffected.
Building your garden room is relatively straightforward for anyone with a good standard of DIY or building
experience. In general, it does not require any special skills, but it will require a logical approach and will sometimes
require some general carpentry. If you have any doubts as to your ability, you should contact Forest Garden and
arrange for a professional team to assemble the building for you.
Be aware of any raised ground surrounding the site of the garden room as this may cause water to drain onto the
slab base or under the Xtend building. Building the base correctly is very important – cutting corners on this part of
the project will potentially make assembly difcult, and jeopardise the longevity of your garden room.
For more information on building your base, please refer to the Base Preparation section mentioned in this guide
book.
It is strongly recommended that you build your garden room in dry conditions for the best building experience
and results.
In addition to this written guide, we also have a supplementary ‘how to’ video guide which can be viewed at
forestgarden.co.uk if you would like any extra guidance during your step by step build.
The step by step assembly instructions are partly generic. The oor plans provided are specic to your Xtend
garden building but most of the imagery is generic, as the build is relatively the same for all Xtend garden buildings.
The main difference is the quantity of components provided.
XTEND GARDEN BUILDING INFORMATION & ASSEMBLY GUIDE 4
BEARERS & FLOOR PANELS
Lay the bearers down and spread them out roughly
ready to position the oor panels on top.
Ensure the panel is ush to the edges of the rst
bearer. Ensure the oor panel on the bearers are
level using a spirit level as a guide.
33
55
1122
Pre-drill for every process before securing with
screws. Pre-drill 5 holes along the edge of the rst
oor panel. Do not screw in the other side at the
moment.
Using 125mm screws, screw through the oor
panel into the oor bearer beneath. Repeat the
process for the 4 other screws. Ensure each screw
is countersunk.
Place the second oor panel (A) onto the middle
and end bearers. Ensure the panel is positioned
half way on the middle bearer.
Place the rst oor panel (B) on ush to the edge
of the rst bearer and halfway onto the second
bearer. Place the black underside of the oor panel
on top of the bearers as shown above.
44
66
5
BEARERS & FLOOR PANELS
Using a rubber mallet, knock the second panel into
the rst for a tight t.
Using 4 x 35mm screws, pre-drill and screw where
the adjoining panels intersect. This will secure the
oor panels together.
99
1111
A
B
7788
This step does not apply for the Xtend2.5 build.
You only have 2 oors. Use the layout on step 11a
as a guide.
Once happy that all panels are in the correct
position, further secure with 5 x 125mm screws
along the outer edge of the second panel.
Screw positions are shown in the diagram above.
The larger screw heads are 125mm and the smaller
ones are 35mm. The fully constructed oor should
now be fully secured and ush to the edges of all
the oor bearers. Use a spirit level to ensure the
oor is level before continuing with the build.
Knock on the front and back of the second panel
to ensure it is ush on both edges to the rst panel
and oor bearers.
1010
11a11a
6
FLOOR PANEL CAPS & OSB SHEETS
The components provided will be labelled
according to the components list at the back of
this guide book.
11b11b
Pre-drill and use 4 x 125mm screws ensuring
each screw goes into the bearer beneath. Screw
35mm screws between the 125mm screws. Repeat
process for the other oor capping.
1313
This step does not apply for the Xtend2.5 build.
You only have two OSB sheets.
1717
Using 35mm screws, screw 3 across the top and 5
down the sides of each OSB sheet. Screw along
the sides rst.
1515
Insert and knock the oor capping (AL) into place
using a rubber mallet. Ensure it is ush to all
edges.
1212
Position OSB oor sheets (AG) on top of the oor
panels one at a time. Ensure they are ush to all
edges and screw into the corners to keep secure.
1414
Some pieces may be oversized. If this is the case,
saw off any excess once the sheets are screwed in
place to create a ush nish.
1818
Screw the central screws into place, resulting in 3
in a row. This will result in 15 x 35mm screws per
OSB sheet.
1616
7
APPLYING DPC TO YOUR BASE
Start to unwrap the DPC roll and choose a starting
point on the base’s outer face. Ensure it covers half
of the bearers and staple into place.
Once fully wrapped around the base, overlap the
starting point and staple into place.
2121
2323
1919 2020
Using a Stanley knife, cut the DPC at the corner to
create 2 pieces to easily fold onto the OSB sheets
and staple into place.
Continue folding the overhang and corners of DPC
onto the OSB sheets as you make your way around
and staple into place.
The nal result is shown above.
Continue to wrap around the base. We suggest
one person unwraps while the other follows
behind stapling the DPC into place.
a
2222
2424
8
FLOOR PLATES
As part of your assembly pack, you will have been
provided with an OSB offcut to use as an 11mm
guide when positioning the oor plates.
2525
Repeat the process with the front Floor Plate (AL).
Ensure the one end is ush to the side and 11mm
from the front edge.
2727
Your side Floor Plates (AK) will t between your
front and back plates. Ensure 11mm from the outer
edge and 11mm at each end. Once happy with the
position, pre-drill and screw into place using 4 x
125mm screws.
3131
Use the measurement to mark onto the front oor
plate, starting from the end of the timber. Repeat
the process at the opposite end.
2929
Starting with the back Floor Plate (AL), ensure it
is ush at each end and use the 11mm offcut to
ensure an 11mm space from the base’s back edge
all the way along. Pre-drill and screw 4 x 125mm
screws along the timber.
2626
Pre-drill and use 4 x 125mm screws for the front
Floor Plate (AL). Apply 2 x 125mm screws per end.
Measure the width of your Front Panel (O) from
side to side on the OSB sheet.
2828
The nal result is shown above.
3232
Cut and remove the central part of the front oor
plate. This will remove the excess timber from your
door opening. Your front panel will sit ush end to
end of the front oor plate.
3030
a
9
WALL PANELS
SIDE PANEL 2 (H) SIDE PANEL 2 (H)
SIDE PANEL 1 (G) SIDE PANEL 1 (G)
FRONT PANEL
(O)
SIDE PANEL 4 (J)
FRONT PANEL
(O)
LINTEL INSERT (R)
SPLINE (Q)
INBETWEEN
YOUR WALL
PANELS
WINDOW PANEL
(N)
WINDOW PANEL
(N1)
WINDOW INSERT
(AA)
Place onto the oor plate and the wall panel will sit
ush to the edge.
3535
Next, start to build your walls. Each wall panel is
labelled according to the layout shown above and
the components list at the back of this guide.
3333
In the left hand corner, the wall panel will be ush
to the edge and the oor plate as shown above.
3636
Begin the build at the left back corner, starting
with Side Panel 2 (H). Insert the expanding foam
provided into the bottom groove.
3434
WALL PANEL LAYOUT
10
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