Dry lining

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Dry lining
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Dry lining

• 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

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Dry lining

• 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.

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Dry lining

• 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.

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Dry lining

• 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.
• Suitable for both new and refurbishment work.

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Dry lining

• To meet the requirements of the industry,
  plastering manufactures have produced a number of
  specialist systems
• Thermal qualities.
• Moisture resistant.
• Fire.
• Insulation.
• Sound. .

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Dry lining

• The most important activity when dabbing boards
  is setting out the vertical centre lines for
  application of the bonding compound

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Dry lining

• Tools and equipment required
• Measuring tape.
• Level.
• Straight-edge.
• Gauge rod.
• Plumb line.
• Foot lift

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Question

• 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
• d 25 mm

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Find the high spot of wall. Transfer high spot
to ceiling.
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Dry lining

• 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.

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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
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Dry lining

• Previously fixed plasterboard
• fit next board close tight and level
• Apply continuous dabs of bonding compound to the
  perimeters

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Dry lining

• 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.

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Dry lining

• Total area of contact between bonding
  compound/adhesive and plasterboards should not be
  less than 20 of plasterboard area.

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Dry lining

• Checking for alignment and full bonding
• Tap the boards firmly using a straight-edge
  until it lines in with the ceiling and floor
  lines.

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Question

• Name the tools and equipment for dry lining
• Answer
• Tools and equipment required
• Measuring tape.
• Level.
• Straight-edge.
• Gauge rod.
• Plumb line.
• Foot lift

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Question

• What should be the Total area of contact between
  bonding compound/adhesive and plasterboards
• Answer
• should not be less than 20 of plasterboard area.

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Task 1

• 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?

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Answers

• 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
  tapered-edged plasterboard.

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Dry lining

• 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.

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Dry lining

• 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.

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Dry lining

• 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.

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Dry lining

• Knauf Joint Tape
• Perforated white tape for reinforcing joints by
  hand or machine application

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Dry lining

• Knauf corner tape
• Paper tape strengthened with two metallic
  strips, used on external angles.
• Easy to apply corner protection.

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Dry lining

• Knauf Fibre Tape
• Multi-purpose self-adhesive tape for reinforcing
  joints and patch repairs to plasterboard.

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Dry lining

• Name two different types of jointing material.
• setting material, air-dry material

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Dry lining

• Knauf Joint Cement Easy Sand
• A lightweight air-drying compound for bedding
  tapes and finishing joints by hand or machine
  application

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Dry lining

• 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

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Task 2

• 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

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Answers

• 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

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Answers

• 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.

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Answers

• 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

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Soundproofing Solutions to Meet New Part E
Building RegulationsCustom 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.
• An internal wall is defined as a wall between a
  bedroom or room containing a W.C. and other
  rooms.
• There is no Part E requirement for an internal
  wall that contains a door.
• Internal walls are not subject to pre-completion
  testing.
• With internal wall applications there is no Ctr
  adjusting factor required under Part

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Dry lining

• 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.

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Dry lining

• Taping and Jointing
• Procedure for taping boards
• Mix joint cement to correct consistency

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Question

• 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

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Question

• 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

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Dry lining

• Apply jointing tape and cover with first coat of
  joint cement using broad knife or trowel
  feathering out each application

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Dry lining

• Apply second coat of joint cement , when dry
  apply final coat and leave to dry

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Dry lining

• Using internal trowel apply second coat to
  internal angles

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Dry lining

• When the jointing material has set sanding can
  begin

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Dry lining

• A pole sander being used on joints

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Dry lining

• A example of a pole sander

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Dry lining

• An example of a hand sander

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Dry lining

• An example of a broad knife

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Task 3

• 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

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Dry lining

• A selection of knauf dry lining materials

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Dry lining

• Knauf Joint Filler
• Fast setting gypsum compound for bedding joints
  by hand application.

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Question

• Name three types of tape used for dry lining
• Answer
• Knauf joint tape
• Knauf fibre tape
• Knauf corner tape

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Dry lining

• 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.

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Dry lining

• Knauf Ready Mix Joint Cement
• An air-drying pre-mixed jointing compound for
  bedding tapes and finishing joints by hand or
  machine application.

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Dry lining answers

• A board carrier

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Dry lining answers

• A foot lifter

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Dry lining answers

• A hand sander

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Fixing Plasterboard to Metal Stud Partitions

• 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.

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Fixing Plasterboard to Metal Stud Partitions

• 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 plasterers skills come in place with the
  fixing of the boards and the plastering and/or
  taping and filling of the boards.

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Fixing Plasterboard to Metal Stud Partitions

• 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.

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Fixing Plasterboard to Metal Stud Partitions

• 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.

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Fixing Plasterboard to Metal Stud Partitions

• Checking for plumb

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Fixing Plasterboard to Metal Stud Partitions

• Fixing the drywall screws into the metal stud
  using a cordless drill
• Using a foot lift to hold the board in position

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Fixing Plasterboard to Metal Stud Partitions

• 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.

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Fixing Plasterboard to Metal Stud Partitions

• Using a foot lift help position boards 2400mm in
  length to fit to the ceiling

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Fixing Plasterboard to Metal Stud Partitions

• Using a pad saw to cut around services

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Fixing Plasterboard to Metal Stud Partitions

• Using the electric box as a guide mark out the
  position

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Fixing Plasterboard to Metal Stud Partitions

• Cut out the plasterboard using a pad saw