CHSE Odisha VOC-ITV Construction Painter & Decorator cheat sheet

Personal protective equipment for solvent-based paints: nitrile gloves, chemical splash goggles, and a respirator with an organic-vapour cartridge; dust masks (N95-type) are for sanding dust only, not solvent vapour.

Lead paint is presumed present in Indian buildings painted before the 1990s; wet-sand or chemical strip, never dry-sand, and use a P2/P3 respirator plus disposable coveralls.

Asbestos cement sheets and old textured coatings may contain asbestos; stop work and get material tested before scraping or sanding.

Solvent vapours are heavier than air and collect in pits, sumps and low rooms; forced cross-ventilation and a standby observer are required for confined-space painting.

Flash-point rule: paints and thinners with a flash point below 23 degrees C are highly flammable; keep ignition sources, including switches and mobile phones, out of the area.

Ladder angle rule: 4 up to 1 out, i.e. base set out one-quarter of the working height; secure the top and maintain three points of contact.

Scaffold working platform: minimum 600 mm wide for general use, fully boarded, with guardrails at 900-1000 mm and a toe board of at least 150 mm.

First aid for solvent on skin: wash with soap and water, never with thinner; for eye splash, irrigate with clean water for at least 15 minutes and seek medical help.

Store paints and thinners in a locked, ventilated store away from heat, with spill trays and a dry-powder or foam extinguisher nearby; water must not be used on solvent fires.

Brush selection rule: natural bristle for oil and solvent-borne paints (better flow), synthetic filament for water-borne emulsion (bristles do not swell).

Brush width guide: 25-50 mm cutting brush for edges and frames, 75-100 mm for general trim, 100-150 mm for large flat areas.

Roller nap guide: 4-6 mm for smooth plaster and gloss, 10-12 mm for light texture, 18-25 mm for rough masonry and render.

Roller sleeve materials: mohair or short synthetic for gloss, medium synthetic for emulsion, lambswool for textured masonry.

Airless sprayer pressure is set to atomise the coating, not maximised; tip size is matched to coating viscosity and finish, and the tip wears out and must be replaced when spray pattern tails.

Clean tools by material: water for acrylic and emulsion, white spirit or turpentine for oil and alkyd, and dedicated thinner for two-pack epoxy and polyurethane before the pot life expires.

Tool storage rule: hang brushes bristle-down after cleaning or wrap in paper to keep shape; never stand them on the bristles.

Measuring and layout kit for the trade: 5 m steel tape, spirit level, plumb bob, chalk line, and a moisture meter for substrate checks.

New plaster must be fully cured before painting: allow about 4 weeks for cement render and longer for thick coats; a moisture meter reading above roughly 12-15 percent means wait.

Alkaline test on new plaster: phenolphthalein turns pink if free alkali is present; apply an alkali-resisting primer before finishing.

Glossy surfaces must be degreased and dulled (abraded) so the new coat keys mechanically; paint does not bond to a shiny, greasy film.

Chalking, flaking or blistered old paint is removed back to a sound edge, then the edge is feathered by sanding so the repair does not show.

Knots in softwood are sealed with knotting (shellac solution) before priming, otherwise resin bleeds through and stains the finish.

Ferrous metal: remove rust to bare metal (wire brush or abrasive), apply a zinc-rich or red-oxide primer within the same day, then undercoat and finish.

Masonry efflorescence is treated by dry-brushing off the salts and sealing the source of damp; painting over damp traps moisture and causes blistering.

Wood moisture content for painting should be roughly 12-15 percent; exterior joinery is primed on all faces, including the back and end grain, before fixing.

Filler must be applied in thin layers, fully dry, and sanded flush; a filler that shrinks leaves a hollow that telegraphs through gloss.

Paint has four components: binder (resin), pigment, solvent or water (carrier), and additives; the binder type defines the coating family and its performance.

Emulsion (water-borne) dries by coalescence and water evaporation; alkyd and oil paints cure by oxidation, so they yellow in dark interiors and need good ventilation.

Primer, undercoat and finish are not interchangeable: primer promotes adhesion and seals, undercoat builds opacity and fills, finish gives colour, sheen and weather resistance.

Sheen ladder from flat to high: matt, silk or eggshell, satin, semi-gloss, gloss; higher sheen means easier cleaning but better surface preparation is needed to hide defects.

Two-pack epoxy and polyurethane coatings have a pot life after mixing (often 4-8 hours) and must be used within it; adding thinner beyond the data sheet ruins the film.

VOC content matters for indoor air quality and regulation; low-VOC and water-borne alternatives are preferred in occupied buildings and schools.

Coverage is stated on the data sheet as square metres per litre per coat at a stated film thickness; spreading rate falls on rough or porous substrates.

Thinners are matched to the coating: white spirit for alkyd, xylene or toluene for some epoxies, water for acrylics; the wrong thinner causes curdling or poor film formation.

Anti-corrosive primers are chosen by metal: red oxide and zinc phosphate for steel, zinc-rich for severe exposure, etch primer for aluminium and galvanised steel.

Brush sequence: cut in edges first, then lay off in one direction with the grain or the last wet edge, keeping a wet edge to avoid lap marks.

Roller technique: load evenly, work in a W or zig-zag pattern to spread paint, then finish with parallel strokes in one direction before the paint sets.

Two-coat rule: most finishes need two coats at the specified spreading rate; a single thick coat sags, wrinkles and dries unevenly.

Sagging is caused by too much paint or too thin a thinner; runs are corrected only after full drying by sanding flat and recoating.

Spraying: maintain a constant gun-to-surface distance (typically 200-300 mm for conventional guns), overlap passes by about 50 percent, and keep the gun perpendicular to the surface.

Temperature and humidity limits: avoid applying water-borne paints below about 10 degrees C or above 35 degrees C, and avoid oil paints in condensing damp conditions.

Recoat time comes from the data sheet; recoating too early traps solvent and causes wrinkling, too late may need abrading for adhesion.

Masking tape is removed while the paint is still slightly soft to avoid tearing the film; score the edge if the paint has fully hardened.

Wallpaper paste choice follows the covering: standard cellulose paste for light paper, heavy-duty or ready-mixed paste for vinyl and heavy embossed papers.

Pasting rule: paste the paper, not the wall, for most papers, fold pasted side to pasted side and allow the stated soak time so the paper expands before hanging.

Wallcovering drop calculation: number of drops equals room perimeter divided by roll width, rounded up; drops per roll equals roll length divided by drop height (plus pattern repeat), rounded down.

Pattern repeat: straight match wastes one full repeat per drop; offset or half-drop match wastes more, so buy an extra roll for large repeats.

Vinyl wallcoverings in wet areas are hung with a fungicidal adhesive and seams are butted, not overlapped, on a plumb line.

Decorative techniques: rag rolling and sponging use glazes over a satin or eggshell base; stippling uses a stiff brush; dragging uses a long brush in straight passes.

Wood graining and marbling are built in layers: base coat, glaze, then detail with a specialist tool, sealed with a clear varnish.

Textured finishes and Venetian plaster are applied in thin successive trowel coats and burnished; the finish is polished, not painted, so substrate flatness is critical.

Wall area rule: measure the room perimeter, multiply by height, then deduct openings over about 2 square metres (doors, large windows) but not small ones.

Paint quantity formula: litres = area (square metres) divided by spreading rate (square metres per litre), multiplied by the number of coats.

Example: a 60 square metre wall at 10 square metres per litre and two coats needs 60 divided by 10 times 2, i.e. 12 litres.

Primer and undercoat are estimated separately from the finish because their spreading rates differ; do not reuse the finish rate.

Ceiling area equals length times width; add 5-10 percent for texture, porous surfaces and touch-up.

Roll quantity formula: rolls = (number of drops x drop height) divided by usable roll area, then round up and add one spare roll for matching.

Labour estimate uses square metres per day per painter from site records; do not guess, since surface condition changes output by a factor of two or more.

Rate build-up for a quotation: material cost plus labour cost plus scaffolding and access plus overheads and profit, expressed per square metre.

Boards and sheet materials are ordered in standard sizes and waste factor (commonly 5-10 percent) is added to the net measured quantity.

Scale notation 1:50 means one unit on the drawing equals 50 units on site; a 100 mm wall is drawn 2 mm long.

Standard drawing set: plan, elevation, section and detail; a plan is viewed from above, an elevation is a flat view of a face.

Line conventions: continuous thick lines for visible edges, dashed lines for hidden features, chain-dotted lines for centre lines and grid lines.

Dimension lines carry the measurement between extension lines, with arrowheads or oblique strokes at the ends and the figure written above a continuous line.

Hatching conventions: diagonal lines for general sections, stipple for concrete, wavy lines for insulation; a legend on the drawing identifies each material.

North arrow and scale bar on every drawing allow orientation and checking after photocopying or resizing.

Sketches for site use record dimensions in millimetres, state the room and date, and mark openings, sockets and services before work starts.

Symbols for finishes are listed in a finish schedule keyed to room numbers, so the painter reads the schedule, not the drawing, for the coating specification.

Typical project sequence: survey and setting out, substructure, superstructure, services first fix, plastering, then painting and decorating as the final wet trade before handover.

Painting follows plastering and must follow after services second fix is protected; wet trades after painting cause damage and rework claims.

Building permits and approvals come from the local authority before construction; painting contractors must check that work is covered by the main contractor's insurance.

Statutory labour provisions in India include the Minimum Wages Act, the Contract Labour (Regulation and Abolition) Act and the Employees' Provident Fund scheme for eligible workers.

The National Building Code of India and the relevant IS codes (for example IS 2395 for painting of buildings) set good practice for materials and workmanship.

Quality checks at handover: dry film thickness, adhesion, absence of holidays and runs, and colour match under the specified lighting.

Snag list and defect liability period: defects reported within the agreed period are rectified at the contractor's cost.

Material safety data sheets must be available on site for every product used, and workers must be trained in their handling before work begins.

Costing versus pricing: cost is material plus labour plus overhead; price adds the profit margin, and confusing the two erases the margin.

Break-even quantity = fixed costs divided by (price per unit minus variable cost per unit); below this volume the business makes a loss.

GST-registered contracting requires a tax invoice showing GSTIN, HSN or SAC code for painting services, taxable value and tax rate.

A work order should state scope, surface condition, number of coats, brand and product, rate per square metre, payment terms and retention.

Retention commonly held is 5-10 percent of each bill until the defect liability period ends; cash-flow planning must allow for it.

Quotation validity period protects against material price rises; state it, typically 15-30 days.

Employability evidence for a painter: trade certificate, portfolio photographs of finished work, safety training record and references from site supervisors.

Record keeping: measurement sheets signed by the client, delivery challans and labour attendance support both billing and dispute resolution.

Customer complaint handling: inspect, record with photographs, agree the remedy in writing, and complete it within the stated time to protect the reference.

Personal protective equipment for solvent-based paints: nitrile gloves, chemical splash goggles, and a respirator with an organic-vapour cartridge; dust masks (N95-type) are for sanding dust only, not solvent vapour.

Lead paint is presumed present in Indian buildings painted before the 1990s; wet-sand or chemical strip, never dry-sand, and use a P2/P3 respirator plus disposable coveralls.

Asbestos cement sheets and old textured coatings may contain asbestos; stop work and get material tested before scraping or sanding.

Solvent vapours are heavier than air and collect in pits, sumps and low rooms; forced cross-ventilation and a standby observer are required for confined-space painting.

Flash-point rule: paints and thinners with a flash point below 23 degrees C are highly flammable; keep ignition sources, including switches and mobile phones, out of the area.

Ladder angle rule: 4 up to 1 out, i.e. base set out one-quarter of the working height; secure the top and maintain three points of contact.

Scaffold working platform: minimum 600 mm wide for general use, fully boarded, with guardrails at 900-1000 mm and a toe board of at least 150 mm.

First aid for solvent on skin: wash with soap and water, never with thinner; for eye splash, irrigate with clean water for at least 15 minutes and seek medical help.

Store paints and thinners in a locked, ventilated store away from heat, with spill trays and a dry-powder or foam extinguisher nearby; water must not be used on solvent fires.

Brush selection rule: natural bristle for oil and solvent-borne paints (better flow), synthetic filament for water-borne emulsion (bristles do not swell).

Brush width guide: 25-50 mm cutting brush for edges and frames, 75-100 mm for general trim, 100-150 mm for large flat areas.

Roller nap guide: 4-6 mm for smooth plaster and gloss, 10-12 mm for light texture, 18-25 mm for rough masonry and render.

Roller sleeve materials: mohair or short synthetic for gloss, medium synthetic for emulsion, lambswool for textured masonry.

Airless sprayer pressure is set to atomise the coating, not maximised; tip size is matched to coating viscosity and finish, and the tip wears out and must be replaced when spray pattern tails.

Clean tools by material: water for acrylic and emulsion, white spirit or turpentine for oil and alkyd, and dedicated thinner for two-pack epoxy and polyurethane before the pot life expires.

Tool storage rule: hang brushes bristle-down after cleaning or wrap in paper to keep shape; never stand them on the bristles.

Measuring and layout kit for the trade: 5 m steel tape, spirit level, plumb bob, chalk line, and a moisture meter for substrate checks.

New plaster must be fully cured before painting: allow about 4 weeks for cement render and longer for thick coats; a moisture meter reading above roughly 12-15 percent means wait.

Alkaline test on new plaster: phenolphthalein turns pink if free alkali is present; apply an alkali-resisting primer before finishing.

Glossy surfaces must be degreased and dulled (abraded) so the new coat keys mechanically; paint does not bond to a shiny, greasy film.

Chalking, flaking or blistered old paint is removed back to a sound edge, then the edge is feathered by sanding so the repair does not show.

Knots in softwood are sealed with knotting (shellac solution) before priming, otherwise resin bleeds through and stains the finish.

Ferrous metal: remove rust to bare metal (wire brush or abrasive), apply a zinc-rich or red-oxide primer within the same day, then undercoat and finish.

Masonry efflorescence is treated by dry-brushing off the salts and sealing the source of damp; painting over damp traps moisture and causes blistering.

Wood moisture content for painting should be roughly 12-15 percent; exterior joinery is primed on all faces, including the back and end grain, before fixing.

Filler must be applied in thin layers, fully dry, and sanded flush; a filler that shrinks leaves a hollow that telegraphs through gloss.

Paint has four components: binder (resin), pigment, solvent or water (carrier), and additives; the binder type defines the coating family and its performance.

Emulsion (water-borne) dries by coalescence and water evaporation; alkyd and oil paints cure by oxidation, so they yellow in dark interiors and need good ventilation.

Primer, undercoat and finish are not interchangeable: primer promotes adhesion and seals, undercoat builds opacity and fills, finish gives colour, sheen and weather resistance.

Sheen ladder from flat to high: matt, silk or eggshell, satin, semi-gloss, gloss; higher sheen means easier cleaning but better surface preparation is needed to hide defects.

Two-pack epoxy and polyurethane coatings have a pot life after mixing (often 4-8 hours) and must be used within it; adding thinner beyond the data sheet ruins the film.

VOC content matters for indoor air quality and regulation; low-VOC and water-borne alternatives are preferred in occupied buildings and schools.

Coverage is stated on the data sheet as square metres per litre per coat at a stated film thickness; spreading rate falls on rough or porous substrates.

Thinners are matched to the coating: white spirit for alkyd, xylene or toluene for some epoxies, water for acrylics; the wrong thinner causes curdling or poor film formation.

Anti-corrosive primers are chosen by metal: red oxide and zinc phosphate for steel, zinc-rich for severe exposure, etch primer for aluminium and galvanised steel.

Brush sequence: cut in edges first, then lay off in one direction with the grain or the last wet edge, keeping a wet edge to avoid lap marks.

Roller technique: load evenly, work in a W or zig-zag pattern to spread paint, then finish with parallel strokes in one direction before the paint sets.

Two-coat rule: most finishes need two coats at the specified spreading rate; a single thick coat sags, wrinkles and dries unevenly.

Sagging is caused by too much paint or too thin a thinner; runs are corrected only after full drying by sanding flat and recoating.

Spraying: maintain a constant gun-to-surface distance (typically 200-300 mm for conventional guns), overlap passes by about 50 percent, and keep the gun perpendicular to the surface.

Temperature and humidity limits: avoid applying water-borne paints below about 10 degrees C or above 35 degrees C, and avoid oil paints in condensing damp conditions.

Recoat time comes from the data sheet; recoating too early traps solvent and causes wrinkling, too late may need abrading for adhesion.

Masking tape is removed while the paint is still slightly soft to avoid tearing the film; score the edge if the paint has fully hardened.

Wallpaper paste choice follows the covering: standard cellulose paste for light paper, heavy-duty or ready-mixed paste for vinyl and heavy embossed papers.

Pasting rule: paste the paper, not the wall, for most papers, fold pasted side to pasted side and allow the stated soak time so the paper expands before hanging.

Wallcovering drop calculation: number of drops equals room perimeter divided by roll width, rounded up; drops per roll equals roll length divided by drop height (plus pattern repeat), rounded down.

Pattern repeat: straight match wastes one full repeat per drop; offset or half-drop match wastes more, so buy an extra roll for large repeats.

Vinyl wallcoverings in wet areas are hung with a fungicidal adhesive and seams are butted, not overlapped, on a plumb line.

Decorative techniques: rag rolling and sponging use glazes over a satin or eggshell base; stippling uses a stiff brush; dragging uses a long brush in straight passes.

Wood graining and marbling are built in layers: base coat, glaze, then detail with a specialist tool, sealed with a clear varnish.

Textured finishes and Venetian plaster are applied in thin successive trowel coats and burnished; the finish is polished, not painted, so substrate flatness is critical.

Wall area rule: measure the room perimeter, multiply by height, then deduct openings over about 2 square metres (doors, large windows) but not small ones.

Paint quantity formula: litres = area (square metres) divided by spreading rate (square metres per litre), multiplied by the number of coats.

Example: a 60 square metre wall at 10 square metres per litre and two coats needs 60 divided by 10 times 2, i.e. 12 litres.

Primer and undercoat are estimated separately from the finish because their spreading rates differ; do not reuse the finish rate.

Ceiling area equals length times width; add 5-10 percent for texture, porous surfaces and touch-up.

Roll quantity formula: rolls = (number of drops x drop height) divided by usable roll area, then round up and add one spare roll for matching.

Labour estimate uses square metres per day per painter from site records; do not guess, since surface condition changes output by a factor of two or more.

Rate build-up for a quotation: material cost plus labour cost plus scaffolding and access plus overheads and profit, expressed per square metre.

Boards and sheet materials are ordered in standard sizes and waste factor (commonly 5-10 percent) is added to the net measured quantity.

Scale notation 1:50 means one unit on the drawing equals 50 units on site; a 100 mm wall is drawn 2 mm long.

Standard drawing set: plan, elevation, section and detail; a plan is viewed from above, an elevation is a flat view of a face.

Line conventions: continuous thick lines for visible edges, dashed lines for hidden features, chain-dotted lines for centre lines and grid lines.

Dimension lines carry the measurement between extension lines, with arrowheads or oblique strokes at the ends and the figure written above a continuous line.

Hatching conventions: diagonal lines for general sections, stipple for concrete, wavy lines for insulation; a legend on the drawing identifies each material.

North arrow and scale bar on every drawing allow orientation and checking after photocopying or resizing.

Sketches for site use record dimensions in millimetres, state the room and date, and mark openings, sockets and services before work starts.

Symbols for finishes are listed in a finish schedule keyed to room numbers, so the painter reads the schedule, not the drawing, for the coating specification.

Typical project sequence: survey and setting out, substructure, superstructure, services first fix, plastering, then painting and decorating as the final wet trade before handover.

Painting follows plastering and must follow after services second fix is protected; wet trades after painting cause damage and rework claims.

Building permits and approvals come from the local authority before construction; painting contractors must check that work is covered by the main contractor's insurance.

Statutory labour provisions in India include the Minimum Wages Act, the Contract Labour (Regulation and Abolition) Act and the Employees' Provident Fund scheme for eligible workers.

The National Building Code of India and the relevant IS codes (for example IS 2395 for painting of buildings) set good practice for materials and workmanship.

Quality checks at handover: dry film thickness, adhesion, absence of holidays and runs, and colour match under the specified lighting.

Snag list and defect liability period: defects reported within the agreed period are rectified at the contractor's cost.

Material safety data sheets must be available on site for every product used, and workers must be trained in their handling before work begins.

Costing versus pricing: cost is material plus labour plus overhead; price adds the profit margin, and confusing the two erases the margin.

Break-even quantity = fixed costs divided by (price per unit minus variable cost per unit); below this volume the business makes a loss.

GST-registered contracting requires a tax invoice showing GSTIN, HSN or SAC code for painting services, taxable value and tax rate.

A work order should state scope, surface condition, number of coats, brand and product, rate per square metre, payment terms and retention.

Retention commonly held is 5-10 percent of each bill until the defect liability period ends; cash-flow planning must allow for it.

Quotation validity period protects against material price rises; state it, typically 15-30 days.

Employability evidence for a painter: trade certificate, portfolio photographs of finished work, safety training record and references from site supervisors.

Record keeping: measurement sheets signed by the client, delivery challans and labour attendance support both billing and dispute resolution.

Customer complaint handling: inspect, record with photographs, agree the remedy in writing, and complete it within the stated time to protect the reference.