Dry lining
Dry lining
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The Dot and Dab Method
The application of
plasterboard has
dramatically changed over
the last 10 years in the
construction industry.
Traditional methods of
two-coat work on walls are
gradually being overtaken
by the system of dabbing
plasterboards to walls
Dry lining
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The problem with the
traditional methods of
two-coat work has been
the setting time for the
wet materials that has led
to a delay in the
completion of the
buildings.
So to speed up,
construction,
manufacturers designed
various dry lining systems
that can be installed
quickly and covered with
plasterboard.
Dry lining
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Gyproc dry liner basic system
Most widely used method to dry line masonry
walls.
Main application is new-build housing sector.
Suitable for most Gyproc plasterboards and
thermal laminates.
Dry lining
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Advantages of dabbing plasterboards to walls
Suitable to be applied to most backgrounds.
Quick to install.
Fire protection.
Speeds up drying time.
Reduces amount of mixing required.
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Suitable for both new and refurbishment work.
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Dry lining
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To meet the requirements of
the industry, plastering
manufactures have produced
a number of specialist
systems:
Thermal qualities.
Moisture resistant.
Fire.
Insulation.
Sound. .
Dry lining
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The most important
activity when dabbing
boards is setting out the
vertical centre lines for
application of the bonding
compound
Dry lining
Tools and equipment required
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Measuring tape.
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Level.
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Straight-edge.
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Gauge rod.
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Plumb line.
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Foot lift
Question
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Dabs of bonding adhesive for fixing plasterboard should be no
thicker than:
a
10 mm
b
15 mm
c
20 mm
d
25 mm
Answer
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d
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25 mm
Find the high spot
of wall.
Transfer high spot
to ceiling.
Dry lining
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Fixing the boards in
place
Plasterboards are
then tamped back to
setting out lines at
floor and ceiling with
a straightedge
ensuring a good
strong bond between
board and
background.
Add 10 mm on high spot
for thickness of dab.
Snap chalk lines.
Transfer lines down to
floor.
Set out boards from
internal angle
Set out end of boards
and centre of boards
Dry lining
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Previously fixed
plasterboard
fit next board
close tight and
level
Apply continuous
dabs of bonding
compound to the
perimeters
Dry lining
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Use a foot lift to place
the board in position.
Using a straight edge
tamp the board back to
the setting out lines at
the floor and ceiling.
The total area of contact
between bonding adhesive
and the plasterboard
should not be less than
20% of the plasterboard
area.
Dry lining
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Total area of contact
between bonding
compound/adhesive
and plasterboards
should not be less
than 20% of
plasterboard area.
Dry lining
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Checking for
alignment and full
bonding
Tap the boards
firmly using a
straight-edge until it
lines in with the
ceiling and floor lines.
Question
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Name the tools and equipment for dry
lining
Answer
Tools and equipment required
Measuring tape.
Level.
Straight-edge.
Gauge rod.
Plumb line.
Foot lift
Question
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What should be the Total area of contact
between bonding compound/adhesive and
plasterboards
Answer
should not be less than 20% of
plasterboard area.
Task 1
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1
Name three tools used for fixing plasterboard for direct
bond.
2 List two thicknesses and widths of plasterboard used in
direct bond.
3 What type of plasterboard is best for direct bond?
Answers
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1
Name three tools used for fixing plasterboard for direct
bond.
Any three of the following hawk, trowel, straight edge, spirit
level, foot lifter, chalk line
2 List two thicknesses and widths of plasterboard used in
direct bond.
thickness: 9.5 mm and 12.5 mm, width: 900 mm and 1200 mm
3 What type of plasterboard is best for direct bond?
The best type of plasterboard for direct bond is taperededged plasterboard.
Dry lining
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Apply dabs for the next
board and continue along
the wall.
At internal angles cut the
board to size and place
the cut edge to the angle.
At external angles apply
adhesive dabs close to the
angle on each side.
At windows apply a
continuous line of dabs.
Dry lining
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Points to remember when
fixing boards to walls.
Always ensure you have
applied sufficient dabs in
a regular pattern.
When working round
services ensure a
continuous fillet of
adhesive is applied around
the whole area.
Dry lining
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Ensure the background
clean dry and dust free.
Always ensure a band of
adhesives applied at
skirting level to provide
good fixing for skirting
boards.
Remember the boards
used may be tapered edge
boards which means they
will not be plastered –
keep the finished surface
free from adhesive.
Dry lining
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Knauf Joint Tape
Perforated white
tape for
reinforcing joints
by hand or
machine
application
Dry lining
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Knauf corner tape
• Paper tape
strengthened with
two metallic
strips, used on
external angles.
• Easy to apply
corner protection.
Dry lining
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Knauf Fibre Tape
Multi-purpose
self-adhesive tape
for reinforcing
joints and patch
repairs to
plasterboard.
Dry lining
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Name two different types of
jointing material.
setting material, air-dry
material
Dry lining
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Knauf Joint
Cement Easy Sand
A lightweight airdrying compound
for bedding tapes
and finishing joints
by hand or
machine
application
Dry lining
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Knauf Ready Mix Lite
Easy Sand
A pre-mixed light
joint cement for
bedding tapes and
finishing joints with
superior sanding
characteristics for
hand or machine
application
Task 2
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4 Name two different types of jointing material.
5 To produce the best results with jointing material what should
you avoid within the material?
6 Name two types of reinforcement used on plasterboard joints
in direct bond.
7 Name two types of reinforcement used on external angles in
direct bond.
8 The background for direct bond should be of what quality and
why?
9 Dabs of bonding adhesive for fixing plasterboard should be no
thicker than:
a
10 mm
b
15 mm
c
20 mm
d
25 mm
Answers
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4 Name two different types of jointing material.
setting material, air-dry material
5 To produce the best results with jointing material what
should you avoid within the material?
Jointing material should be mixed to a smooth paste with no
lumps or set hard pieces of jointing material.
6 Name two types of reinforcement used on
plasterboard joints in direct bond.
two types of joint tape: paper tape and self-adhesive
glass fibre mesh
Answers
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7 Name two types of reinforcement used on external angles in
direct bond.
reinforced paper corner tape, drywall metal beads
8 The background for direct bond should be of what quality
and why?
The background for direct bond should be of good quality and
level, because if the adhesive used to fix the boards is too
thick it will not hold the boards securely back to the
background.
Answers
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9 Dabs of bonding adhesive for fixing plasterboard should be no
thicker than:
a
10 mm
b
15 mm
c
20 mm
d
25 mm
Soundproofing Solutions to Meet New Part E Building
Regulations
Custom Audio Designs now offers Sound Testing!! Call for
Details.
INTERNAL WALLS / PARTITIONS
UNDER PART E:
The internal wall requirement for the new Part E Regulations is 40
RwdB.
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An internal wall is defined as a wall between a bedroom or room
containing a W.C. and other rooms.
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There is no Part E requirement for an internal wall that contains a
door.
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Internal walls are not subject to pre-completion testing.
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With internal wall applications there is no Ctr adjusting factor required
under Part
Dry lining
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Knauf joint tape
Pre-creased tape used to increase the resistance
to cracking of flat joints and internal angles.
Knauf fibre tape
Self-adhesive glass fibre mesh tape used as an
alternative to joint tape.
Knauf corner tape
Paper tape strengthened with two metallic strips,
used on external angles.
Easy to apply corner protection.
Dry lining
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Taping and
Jointing
Procedure for
taping boards
Mix joint cement
to correct
consistency
Question
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What should the total area of
contact between the bonding
adhesive and the plasterboard be ?
Answer
The total area of contact between bonding
adhesive and the plasterboard should not
be less than 20% of the plasterboard area
Question
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Which tool is used to lift the
plasterboard into position on the wall
Answer
A foot lifter is used to lift the board into
position
Dry lining
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Apply jointing tape
and cover with
first coat of joint
cement using
broad knife or
trowel feathering
out each
application
Dry lining
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Apply second coat
of joint cement ,
when dry apply
final coat and
leave to dry
Dry lining
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Using internal
trowel apply
second coat to
internal angles
Dry lining
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When the jointing
material has set
sanding can begin
Dry lining
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A pole sander
being used on
joints
Dry lining
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A example of a
pole sander
Dry lining
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An example of a
hand sander
Dry lining
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An example of a
broad knife
Task 3
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On page 232 answer question 11
In your own word describe how to dry line a wall, and what
materials you would use
Read page 185 and in your own word describe the setting out
procedure
Name three types of dry lining tape
Answer
Knauf joint tape
Knauf fibre tape
Knauf corner tape
Dry lining
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A selection of
knauf dry lining
materials
Dry lining
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Knauf Joint Filler
Fast setting
gypsum compound
for bedding joints
by hand
application.
Question
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Name three types of tape used for
dry lining
Answer
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Knauf joint tape
Knauf fibre tape
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Knauf corner tape
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Dry lining
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Knauf Joint Cement
Easy Sand
A multi-purpose
gypsum-based
adhesive for use with
Knauf Metal Furring
Channel and for
direct bonding of
Knauf Plasterboards
and Insulating
Laminates. Should not
be used for moisture
resistant boards or
vapour check boards.
Dry lining
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Knauf Ready Mix
Joint Cement
An air-drying premixed jointing
compound for
bedding tapes and
finishing joints by
hand or machine
application.
Dry lining answers
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A board carrier
Dry lining answers
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A foot lifter
Dry lining answers
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A hand sander
Fixing Plasterboard to
Metal Stud Partitions
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A common partition wall system now seen on site
is the Metal Stud the advantages of this
method are of:
• Lightweight non-load bearing.
• Quick assembly.
• User friendly.
• Can be relocated.
Fixing Plasterboard to
Metal Stud Partitions
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A tradesman classed, as an interior fixer would
generally construct the metal this being a dry
trade area, more associated with a joiner's role.
The plasterer’s skills come in place with the
fixing of the boards and the plastering and/or
taping and filling of the boards.
Fixing Plasterboard to
Metal Stud Partitions
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Basic procedure for fixing to metal stud
Cut and measure the boards as you would fixing
to timber backgrounds.
Use dry wall screws to fi x the boards using a
screw gun is an ideal tool.
Fix screws at 300mm centres.
Use battery operated drills no trailing of leads
and easy movement around the partitions.
Ensure services fi xed to sections of studding.
Cut boards accurately around services to avoid
cracks appearing.
Fixing Plasterboard to
Metal Stud Partitions
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Fixing Boards to
Metal Stud
Quicker to build than
timber partitions.
Improved sound
insulation.
Will not twist or
shrink.
Basic tools required.
Easy to cut.
Fixing Plasterboard to
Metal Stud Partitions
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Checking for
plumb
Fixing Plasterboard to
Metal Stud Partitions
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Fixing the drywall
screws into the
metal stud using a
cordless drill
Using a foot lift to
hold the board in
position
Fixing Plasterboard to
Metal Stud Partitions
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Fixing the plasterboards to a studded wall
is very similar to that of fixing to a
ceiling.
Start from the internal corner and work
your way to the external angles.
If the plasterboards exceed the height of
the studding cut the board to length and
this will leave only vertical joints to tape.
Fixing Plasterboard to
Metal Stud Partitions
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Using a foot lift
help position
boards 2400mm in
length to fit to
the ceiling
Fixing Plasterboard to
Metal Stud Partitions
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Using a pad saw to
cut around
services
Fixing Plasterboard to
Metal Stud Partitions
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Using the electric
box as a guide
mark out the
position
Fixing Plasterboard to
Metal Stud Partitions
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Cut out the
plasterboard using
a pad saw