Dry lining

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

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.

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.

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.

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. .

Dry lining The most important

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

Dry liningTools and equipment

required Measuring tape. Level. Straight-edge. Gauge rod. Plumb line. Foot lift

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

Find the high spot of wall.

Transfer high spot to ceiling.

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.

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 Previously fixed plasterboard

fit next board close tight and level

Apply continuous dabs of bonding compound to the perimeters

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.

Dry lining Total area of

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

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.

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

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.

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?

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.

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.

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.

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.

Dry lining Knauf Joint Tape Perforated white

tape for reinforcing joints by hand or machine application

Dry lining Knauf corner

tape • Paper tape

strengthened with two metallic strips, used on external angles.

• Easy to apply corner protection.

Dry lining Knauf Fibre Tape Multi-purpose

self-adhesive tape for reinforcing joints and patch repairs to plasterboard.

Dry lining Name two different types of

jointing material.

setting material, air-dry material

Dry lining Knauf Joint

Cement Easy Sand

A lightweight air-drying compound for bedding tapes and finishing joints by hand or machine application

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

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

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

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.

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

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

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.

Dry lining Taping and

Jointing Procedure for

taping boards Mix joint cement

to correct consistency

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

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

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

Dry lining Apply second

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

Dry lining Using internal

trowel apply second coat to internal angles

Dry lining When the jointing

material has set sanding can begin

Dry lining A pole sander

being used on joints

Dry lining A example of a

pole sander

Dry lining An example of a

hand sander

Dry lining An example of a

broad knife

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

Dry lining A selection of

knauf dry lining materials

Dry lining Knauf Joint Filler Fast setting

gypsum compound for bedding joints by hand application.

Question Name three types of tape used for

dry lining Answer Knauf joint tape Knauf fibre tape Knauf corner tape

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.

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.

Dry lining answers A board carrier

Dry lining answers A foot lifter

Dry lining answers A hand sander

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.

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 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 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 Boards to Metal Stud

Quicker to build than timber partitions.

Improved sound insulation.

Will not twist or shrink.

Basic tools required. Easy to cut.


Checking for plumb


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 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.


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


Using a pad saw to cut around services


Using the electric box as a guide mark out the position


Cut out the plasterboard using a pad saw

Dry lining

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