Section 26 – Painting and Decorating

QCS 2014
Section 26: Painting and Decorating
Part
01: General
Page 1
1
GENERAL ...................................................................................................... 2
1.1
GENERAL INTRODUCTION ......................................................................... 2
1.1.1
1.1.2
Scope
References
1.2
SUBMITTALS AND SAMPLES ...................................................................... 2
1.2.1
1.2.2
Samples
List of Materials
1.3
DELIVERY, STORAGE, HANDLING AND PRODUCT MARKING ................ 3
1.3.1
1.3.2
Marking of Containers
Marking of Papers/Fabrics
2
2
2
3
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TC
3
3
QCS 2014
Section 26: Painting and Decorating
Part
01: General
1
GENERAL
1.1
GENERAL INTRODUCTION
1.1.1
Scope
1
This Section specifies the requirements for the following:
(a)
preparation, painting or finishing of exterior and interior surfaces exposed to view
(b)
wall covering requirements and installation of fabrics, vinyl, decorative papers and
other such decorative wall coverings
(c)
it does not include factory applied finishes and the painting of metal surfaces of
mechanical and electrical installations unless otherwise required by Project
Documentation.
Related Sections are as follows:
Section 8
Section 18
Section 24
Section 27
Metalwork
Carpentry, Joinery, and Ironmongery
Finishes to Buildings
External Works to Buildings
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2
Page 2
References
1
The following standards are referred to in this Section:
AM
1.1.2
BS 245 ........................Mineral solvent (white spirit and related hydrocarbon solvents) for
paints and other purposes
BS 1336 ......................Knotting
BS 4652 ......................Metallic zinc-rich priming paint (organic media)
BS 4756 ......................Ready-mixed aluminium priming paints for woodwork
BS 5082 ......................Water-borne priming paints for woodwork
BS 5358 ......................Solvent-borne priming paints for woodwork
1.2
SUBMITTALS AND SAMPLES
1.2.1
Samples
1
Sample panels are to be prepared for each type and colour of coating material to be used in
the Works and shall be submitted to the Engineer for approval. As a minimum, the following
sample panels shall be submitted:
2
Paint Colours: 300 x 300 mm samples labelled to indicate finish, formula, colour name
and/or, number, sheen and gloss units of approved colours for:
3
(a)
each specified colour in each specified finish coat material.
(b)
each standard wood finish on specified wood species.
Other Materials: 500 x 500 mm (minimum) samples of each paper/fabric material minimum
size showing at least the pattern repeat where applicable.
QCS 2014
Section 26: Painting and Decorating
Part
01: General
Page 3
1.2.2
List of Materials
1
Before ordering materials, the Contractor is to submit a list of those materials proposed for
use on the Project for the Engineer’s approval.
1.3
DELIVERY, STORAGE, HANDLING AND PRODUCT MARKING
1.3.1
Marking of Containers
1
Materials to be delivered in sealed containers shall be clearly labelled with the following
information:
(a)
manufacturer’s name, initials or recognised trade mark
(b)
title and specification number
(c)
whether the material is primer, undercoat or finishing coat
(d)
whether the material is for internal or external use, where appropriate
(e)
colour reference from BS 4800
(f)
method of application
(g)
batch number and date of manufacture or re-test.
No paint is to be used more than 18 months after manufacture or re-test.
3
Coating materials other than spray paints, bituminous paints and textured masonry paints are
to be in containers not exceeding 5 litres capacity.
1.3.2
Marking of Papers/Fabrics
1
Papers/fabrics are to be clearly marked with batch and shade numbers as appropriate.
AM
TC
2
END OF PART
QCS 2014
Section 26: Painting and Decorating
Part
02: Surface Preparation for Painting
Page 1
2
SURFACE PREPARATION FOR PAINTING................................................. 2
2.1
GENERAL ...................................................................................................... 2
2.1.1
2.1.2
Scope
References
2.2
GENERAL PREPARATIONS ......................................................................... 2
2.2.1
2.2.2
Preparation
Preparatory Materials
2.3
PREPARATION OF PLASTERED AND RENDERED SURFACES ............... 3
2.3.1
Execution and Workmanship
2.4
PREPARATION OF WOOD SURFACES ...................................................... 3
2.4.1
Execution and Workmanship
2.5
PREPARATION OF METAL SURFACES ...................................................... 4
2.5.1
Execution and Workmanship
2.6
PAINT REMOVERS ....................................................................................... 4
2.6.1
Materials
2
2
2
2
3
3
4
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QCS 2014
Section 26: Painting and Decorating
Part
02: Surface Preparation for Painting
Page 2
2
SURFACE PREPARATION FOR PAINTING
2.1
GENERAL
2.1.1
Scope
1
This Part specifies the process and workmanship to be used in preparing surfaces to be
painted.
2
Related Parts and Sections are as follows:
This Section
Part 3
Primers, Paints and Coatings
Section 24
Finishes to Buildings
2.1.2
References
1
The following standards are referred to in this Section:
AM
BS 1336 ......................Knotting
TC
BS 245 ........................Mineral solvent (white spirit and related hydrocarbon solvents) for
paints and other purposes
2.2
GENERAL PREPARATIONS
2.2.1
Preparation
1
Before painting commences all surfaces in the work area are to be washed and scrubbed
clean of debris and every possible precaution taken to keep down dust. No paint is to be
applied to surfaces structurally or superficially damp and all surfaces must be ascertained to
be free from condensation, efflorescence, etc., before the application of each coat.
2
All items not required to be painted (e.g., ironmongery) are first to be fitted and then removed
before any painting preparation commences. The fittings shall be refixed in position when all
painting is completed.
3
Brushes, pails, kettles, etc., used in carrying out the work are to be clean and free from
foreign matter. They are to be thoroughly cleaned before being used for different types or
classes of material.
4
All materials to be used for surface preparations are to be used strictly in accordance with the
manufacturer’s instructions.
2.2.2
Preparatory Materials
1
Paint removers, abrasive papers and blocks, cleaning agents, etching solutions, stopping,
knotting, fillers and other commodities are to be of the types recommended by the
manufacturer of the coating to be applied.
2
White spirit shall comply with BS 245.
QCS 2014
Section 26: Painting and Decorating
Part
02: Surface Preparation for Painting
Page 3
Knotting shall comply with BS 1336.
4
Stopping and filler for woodwork shall be an approved proprietary lead free, oil-based type
recommended for internal or external work as appropriate. Stopping for woodwork to receive
a clear finish shall be tinted to match with the surrounding woodwork.
5
Filler for plaster and rendering to be an approved proprietary type.
2.3
PREPARATION OF PLASTERED AND RENDERED SURFACES
2.3.1
Execution and Workmanship
1
The surface is first to be scraped to remove mortar splashes, etc., and then made good,
cutting out all defective work and repairing with plaster or render of the same type as
previously used.
2
The surface is then to be rubbed down with fine glass paper to remove loose particles and to
smooth irregularities before the application of the filler coat which is to be spread evenly with
a scraper over all surfaces and allowed to dry.
3
The first application of filler coat will be rubbed down and a second application of filler coat
made as before.
4
The surface is then to be sanded using progressively finer grades of paper until perfectly
smooth and approved by the Engineer.
5
All rendered surfaces are to receive one full coat of alkali resistant primer before the
application of oil based paints.
2.4
PREPARATION OF WOOD SURFACES
2.4.1
Execution and Workmanship
1
All large, loose or resinous knots are to be cut out and the holes plugged with sound wood.
Nails are to be punched well below surfaces.
2
All surfaces are to be rubbed down with fine glass paper in the direction of the grain to give a
smooth, even finish with arises rounded or eased.
3
After dusting off all oily woods such as teak and afrormosia they are to be washed with white
spirit.
4
Two thin coats of knotting should be applied to all knots and any other resinous parts of
softwood.
5
A full coat of primer is to be vigorously brushed in, particular care being taken to fill end grain.
Backs of members are to receive two coats of primer.
6
After priming all nails, screw holes and similar depressions are to be filled with stopping,
pressed well in and finished off flush with the surface. Screw heads are to be countersunk
sufficiently to hold the stopping.
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QCS 2014
Section 26: Painting and Decorating
Part
02: Surface Preparation for Painting
Page 4
After priming and stopping is completed, pore and grain irregularities are to be treated with a
coat of brush or knife applied filler, and the surface rubbed down smooth and even.
2.5
PREPARATION OF METAL SURFACES
2.5.1
Execution and Workmanship
1
Iron and steel surfaces are to be wire brushed to remove rust, loose scale, welding slag and
spatter, and cleaned with white spirit to remove oil, grease and dirt.
2
Iron and steel surfaces are to receive two coats of primer.
3
On pre-primed surfaces care is to be taken to ensure that defective primer, rust and loose
scale are removed back to bare metal and patch primed.
4
Blast cleaned surfaces shall be primed within 1 hour of blasting. All other surfaces shall be
primed no later than 3 hours after preparation.
2.6
PAINT REMOVERS
2.6.1
Materials
1
The use of paint remover products are to be used only under conditions of acceptable air
ventilation/circulation for those performing the work and for the surrounding environs if
occupied or used by the public.
2
Paint remover products are to be of the type recommended by the manufacturer of the
coating to be applied.
3
Mineral solvent (white spirit and related hydrocarbon solvents) used in relation to paint
removal process is to conform to BS 245.
4
Manufacturer’s recommended procedures and application of paint remover products are to
be followed.
AM
TC
7
END OF PART
QCS 2014
Section 26: Painting and Decorating
Part
03: Primers, Paints and Coatings
Page 1
3 PRIMERS, PAINTS AND COATINGS ....................................................................... 2 3.1 GENERAL REQUIREMENTS ................................................................................... 2 3.1.1 Scope
2 3.1.2 References
2 3.2 APPLICATION ........................................................................................................... 2 3.2.1 General
3.3 PRIMERS AND UNDERCOATINGS ......................................................................... 3 3.3.1 Materials
3 3.3.2 Workmanship
4 3.4 PAINTS AND FINISH COATINGS ............................................................................ 4 3.4.1 Materials
4 3.4.2 Workmanship
5 AM
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2 QCS 2014
Section 26: Painting and Decorating
Part
03: Primers, Paints and Coatings
Page 2
3
PRIMERS, PAINTS AND COATINGS
3.1
GENERAL REQUIREMENTS
3.1.1
Scope
1
This Part specifies requirements for products of primers, paints and coatings for building
surfaces and elements.
2
Related Sections are as follows:
This Section
Part 1
Part 2
General
Surface Preparation for Painting
Section 24
Finishes to Buildings
3.1.2
References
1
The following Standards are referred to in this Section:
BS 4652......................Metallic zinc-rich priming paint (organic media)
TC
BS 4756......................Ready-mixed aluminium priming paints for woodwork
BS 5082......................Water-borne priming paints for woodwork
AM
BS 5358......................Solvent-borne priming paints for woodwork
3.2
APPLICATION
3.2.1
General
1
Coatings are to be applied in accordance with the manufacturer’s instruction to clean, dry
surfaces, in dust free and dry atmospheric conditions and after any previous coats have
hardened.
2
All brands of primers, paints and coatings are to be approved and shall comply with the
relevant British Standards.
3
Paints of different brands are not to be mixed or used in the same coating system.
4
No dilution of painting materials is to be allowed except strictly as detailed by the
manufacturers and as approved by the Engineer
5
No primed or undercoated woodwork and metalwork is to be left in an exposed or unsuitable
location for any undue period before completion of the painting process. No exterior or
exposed painting is to be carried out under adverse weather conditions, such as rain,
extreme humidity, dust storms, etc.
QCS 2014
Section 26: Painting and Decorating
Part
03: Primers, Paints and Coatings
Page 3
3.3
PRIMERS AND UNDERCOATINGS
3.3.1
Materials
1
Primers for plaster and rendering are to be alkali resistant. Primers for other surfaces shall
comply with Table 3.1.
Table 3.1
Suitable Primers for Background
SURFACE
PRIMER
Non resinous wood
Low lead oil based primer to BS 5358 or
Aluminium wood primer to BS 4756 or Solvent
borne acrylic primer
Aluminium wood primer to BS 4756 or long oil
alkyd based oxidative drying primer
Iron and steel
Red lead primer to BS 2523, Type “B” or zinc
phosphate pigmented urethane alkyd modified
primer
Galvanised steel
Calcium plumbate primer to BS 3698, Type “A” or
TC
Resinous woods
AM
Zinc chromate primer
Two component polyamide cured epoxy or
modified vinyl based physically drying primer.
Blast cleaned iron and steel or
touching-up damaged zinc coatings
Zinc-rich primer to BS 4652, Types 1, 2, and 3
Aluminium and aluminium alloys
Etch primer plus zinc chromate primer
Copper
Two component polyamide adduct cured epoxy or
Modified vinyl based physically drying primer
Lead
Long oil alkyd based oxidative drying primer
Plastics
Two component polyamide adduct cured epoxy
primer or
Solvent borne acrylic based physically drying
primer.
2
Undercoats on wood and metal surfaces are to be of the drying-oil/resin binder type
pigmented with titanium dioxide and/or coloured pigments providing a matt or low-sheen
finish suitable for subsequent application of a drying-oil type finish.
3
Water thinned priming paints and undercoats shall only be used with the approval of the
Engineer. In order to obtain such approval, the Contractor shall demonstrate that proposed
water thinned priming paints and undercoats comply with BS 5082.
QCS 2014
Section 26: Painting and Decorating
Part
03: Primers, Paints and Coatings
Page 4
Workmanship
1
Priming coats are to be applied by brush unless other methods are approved taking care to
work the primer into the surface, joints, angles and end grain.
2
Any primed surfaces which have deteriorated on site or in transit are to be touched up to the
approval of the Engineer.
3
All surfaces of joinery which have not been primed in the workshop are to be primed
immediately on arrival at site and before fixing.
4
Undercoats are to be applied as an even film over all exposed surfaces avoiding an uneven
thickness at edges and angles.
5
All priming and undercoats are to be rubbed down to a smooth surface with fine abrasive
paper and cleaned of all dust before the application of the next coat.
3.4
PAINTS AND FINISH COATINGS
3.4.1
Materials
1
The number of coats shall be as specified by the paint manufacturer, or at minimum, as
specified on Table 3.2.
TC
3.3.2
SURFACE
Wood-oil paint
AM
Table 3.2
Minimum Number of Coats for Drying-Oil/Resin Based Paint Systems on New Work
LOCATION
PAINT SYSTEM
Internal
1 coat primer
1 coat undercoat
1 coat alkyd gloss finish
or
1 coat primer
2 coats alkyd mid-sheen finish
External
1 coat primer
2 coats undercoat
1 coat alkyd gloss finish
(lead free)
Internal
3 coats varnish or polyurethane
External
4 coats exterior grade varnish
Iron and steel including
Internal
1 coat primer
1 coat undercoat
1 coat alkyd gloss finish
(lead free)
Galvanised steel
External
2 coats primer
2 coats undercoat
1 coat alkyd gloss finish
(lead free)
Wood-natural finish
QCS 2014
Section 26: Painting and Decorating
Part
03: Primers, Paints and Coatings
SURFACE
LOCATION
Page 5
PAINT SYSTEM
Aluminium
Internal and External
1 coat etch primer
1 coat primer
1 coat undercoat
1 coat alkyd gloss finish
(lead free)
Cement rendering
Internal
1 coat alkali resistant primer
1 coat undercoat
1 coat alkyd gloss finish
(lead free)
Workmanship
1
Care shall be taken to ensure that finish coats applied over calcium plumbate primer are
compatible with the primer.
2
Finish coats will be applied as an even film over all exposed surfaces, avoiding brush marks,
sags, runs and other defects. Where two gloss finish coats are specified the second coat
shall be applied within 48 hours of the first.
3
The application of paint systems for iron and steel should result in a minimum total film
thickness of 125 microns internally or externally notwithstanding the number of coats
specified.
AM
TC
3.4.2
END OF PART
QCS 2014
Section 26: Painting and Decorating
Part
04: Decorative Papers and Fabrics
Page 1
4
DECORATIVE PAPERS AND FABRICS .................................................................. 2
4.1
GENERAL ................................................................................................................. 2
4.1.1
Scope
4.2
MATERIALS .............................................................................................................. 2
4.2.1
4.2.2
Products Requirements
Adhesives
4.3
PREPARATION OF NEW SURFACES FOR PAPERS AND FABRICS .................... 2
4.3.1
Execution and Workmanship
4.4
PREPARATION OF PREVIOUSLY PAPERED/PAINTED SURFACES .................... 3
4.4.1
Execution and Workmanship
4.5
HANGING OF DECORATIVE PAPERS AND FABRICS ........................................... 3
4.5.1
Execution and Workmanship
2
2
2
2
3
AM
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QCS 2014
Section 26: Painting and Decorating
Part
04: Decorative Papers and Fabrics
Page 2
4
DECORATIVE PAPERS AND FABRICS
4.1
GENERAL
4.1.1
Scope
1
The Part provides specification for use of decorative papers or fabrics for application as wall
or other surface covering.
2
Related Sections are as follows:
This Section
Part 1
Part 2
Part 3
General
Surface Preparation for Painting
Primers, Paints, and Coatings
MATERIALS
4.2.1
Products Requirements
1
Samples of all materials to be submitted in accordance with Part 1 of this Section to the
Engineer for approval.
4.2.2
Adhesives
1
Adhesives for wallpaper/fabrics shall be of a type recommended by the manufacturer of the
material to be fixed, and in the absence of such recommendation, to be of to the approval of
the Engineer.
4.3
PREPARATION OF NEW SURFACES FOR PAPERS AND FABRICS
4.3.1
Execution and Workmanship
1
Rendered surfaces are to be scraped to remove mortar splashes and all irregularities,
cracks and blow holes to be filled and rubbed down when dry to a smooth surface removing
all nibs and loose material.
2
Rendering and other alkaline surfaces are to receive one coat of alkali resistant primer.
3
All nail and screw heads to rigid sheet surfaces are to be below the surface, touched in with
metal primer and allowed to dry before filling.
4
Paperfaced plasterboard, hardboard, chipboard and the like are to receive one coat of
general purpose primer.
5
Surfaces which have not been primed and other surfaces recommended by the adhesive
manufacturer are to receive one coat of size which shall be allowed to dry.
AM
TC
4.2
QCS 2014
Section 26: Painting and Decorating
Part
04: Decorative Papers and Fabrics
Page 3
4.4
PREPARATION OF PREVIOUSLY PAPERED/PAINTED SURFACES
4.4.1
Execution and Workmanship
1
All existing paper or fabric should be removed and the surface washed down with warm
water to remove old adhesive and size. All existing painted surfaces are to be scraped to
remove any loose material and washed with a detergent solution to remove any dirt and
grease.
2
All irregularities and cracks are to be filled and rubbed down when dry to a smooth surface.
3
Bare and filled areas are to be touched in with general purpose primer.
4.5
HANGING OF DECORATIVE PAPERS AND FABRICS
4.5.1
Execution and Workmanship
1
Hanging should not commence until:
all work affecting the surfaces to be covered is complete
(b)
the surfaces to be covered are dry and free from dust
(c)
the painting of adjacent surfaces is finished and dry
TC
(a)
Switch plates, grilles, etc., are to be removed before hanging commences and replaced
when the surfaces are dry.
3
The Engineer’s instruction is to be obtained where the specified covering will allow minor
blemishes in the surfaces to show.
4
Only rolls with the same shade number are to be used in any one area. Before hanging, the
rolls are to be carefully matched for colour.
5
The manufacturer’s recommendations for hanging the covering and to which surface the
adhesive is best applied is to be followed. Great care shall be taken to avoid staining the
face of the paper or fabric.
6
All lengths are to be in one piece unless greater than the roll length.
7
Patterned paper or fabric is to be correctly aligned and accurately matched. Where
mismatching is unavoidable the Engineer’s approval is to be obtained to the position
allocated.
8
Wallpaper is to be accurately butt jointed. Where incomplete widths are required or where
materials do not have straight edges the joints are to be overlapped and cut through using a
straight edge to form a butt joint. Edges are to be neatly trimmed to a true line at junctions
with other finishes.
9
When finished, papers and fabrics are to be free from air bubbles, wrinkles, gaps, tears,
adhesive marks and stains and should be secure and smooth.
AM
2
END OF PART