By the end of this chapter, you will be able to:
Mastering these skills will help you deliver professional, high-quality results that impress clients and set you apart in the interior finishing trade!
Paint is a liquid or paste coating that is applied to a surface in a thin layer and dries or cures to form a solid, continuous film that protects and decorates the surface. In interior design, paint is the most widely used and economical finish, able to change the mood, colour, light quality and character of a space quickly, while also protecting walls, ceilings, timber and metal from moisture, dirt and wear. Understanding what paint is made of and what each ingredient does helps designers specify the right product, judge quality and avoid failures such as peeling, fading or poor coverage. Example: when refurbishing a children's ward, a designer specifies a washable, low-odour paint with good opacity so that bright colours stay clean, cover well in two coats and are safe for young patients.
| Component | Description | Function |
|---|---|---|
| Pigment | Fine coloured or white powder, such as titanium dioxide or iron oxide | Gives colour and opacity (hiding power) |
| Binder (vehicle) | Resin such as acrylic, alkyd or vinyl | Binds pigment particles together and makes the film stick to the surface |
| Solvent or thinner | Water or mineral spirits | Makes paint liquid for application and evaporates as paint dries |
| Extenders (fillers) | Inert powders such as chalk, talc or clay | Add body, control sheen and reduce cost |
| Additives | Small amounts of special chemicals | Improve flow, drying, mould resistance and shelf life |
| Sheen level | Appearance | Typical interior use |
|---|---|---|
| Matt (flat) | No shine, hides surface defects | Ceilings and living areas |
| Eggshell | Very low sheen | Bedrooms and lounges |
| Satin | Soft, low shine | Corridors, children's rooms, offices |
| Semi-gloss | Noticeable shine | Kitchens, bathrooms, doors and trims |
| Gloss | High shine, very washable | Doors, frames, railings and metalwork |
Pigment volume concentration (PVC) = volume of pigment and extenders ÷ (volume of pigment and extenders + volume of binder) × 100
A paint factory's matt emulsion batch contains 30 litres of pigment and extenders and 45 litres of binder by volume.
PVC = 30 ÷ (30 + 45) × 100
PVC = 30 ÷ 75 × 100
PVC = 40%, a value typical of a mid-sheen interior paint, since higher PVC gives flatter, less washable finishes and lower PVC gives glossier, tougher ones
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Create a free accountType: Individual
| Tools & Equipment | Materials |
|---|---|
| Measuring tape 5m | Sample boards of wall finishes: Vinyl paint, Wallpaper, Textured plaster, Ceramic tiles |
| Notebook and pen | Color swatch books for interior paints |
| Calculator | Client requirement questionnaire form |
| Computer with installed interior design software | A3 size project specification sheet |
| S/N | Item | Quantity |
|---|---|---|
| 1 | A3 size project specification sheet | 1 Pc per Candidate |
| 2 | Sample boards of wall finishes: Vinyl paint, Wallpaper, Textured plaster, Ceramic tiles | 4 samples per Candidate |
| 3 | Color swatch books for interior paints | 1 set per 3 Candidates |
| 4 | Client requirement questionnaire form | 1 Pc per Candidate |
| 5 | Measuring tape 5m | 1 Pc per Candidate |
| 6 | Notebook and pen | 1 Pc per Candidate |
| 7 | Calculator | 1 Pc per Candidate |
| 8 | Computer with installed interior design software (optional for presentation) | 1 Pc per Candidate |
| Items to be Evaluated | Marks Available | Marks Obtained | Comments |
|---|---|---|---|
| TASK 1: Review project specifications and client requirements | |||
| Read and understood the project specification sheet (Award 3 marks for thorough review) | 3 | ||
| Completed client requirement questionnaire accurately (Award 4 marks for complete and relevant answers) | 4 | ||
| Measured and confirmed wall areas totaling approximately 60 square meters (Award 3 marks for correct measurement and calculation) | 3 | ||
| Sub-Total | 10 | ||
| TASK 2: Select appropriate wall finishes for each room | |||
| Selected suitable finish for Living Room considering aesthetics and durability (Award 4 marks for appropriate selection) | 4 | ||
| Selected suitable finish for Kitchen considering moisture resistance and cleaning (Award 4 marks for appropriate selection) | 4 | ||
| Selected suitable finish for Bathroom considering water resistance and hygiene (Award 4 marks for appropriate selection) | 4 | ||
| Selected suitable finish for Bedroom considering comfort and client preferences (Award 4 marks for appropriate selection) | 4 | ||
| Selected suitable finish for Master Bedroom considering luxury and client preferences (Award 5 marks for appropriate selection) | 5 | ||
| Sub-Total | 21 | ||
| TASK 3: Justify the choice of finishes | |||
| Provided clear justification for Living Room finish based on project and client needs (Award 3 marks for relevant justification) | 3 | ||
| Provided clear justification for Kitchen finish based on project and client needs (Award 3 marks for relevant justification) | 3 | ||
| Provided clear justification for Bathroom finish based on project and client needs (Award 3 marks for relevant justification) | 3 | ||
| Provided clear justification for Bedroom finish based on project and client needs (Award 3 marks for relevant justification) | 3 | ||
| Provided clear justification for Master Bedroom finish based on project and client needs (Award 4 marks for relevant justification) | 4 | ||
| Sub-Total | 16 | ||
| TASK 4: Present final selection in a clear format | |||
| Compiled a neat and organized wall finishes selection document (Award 3 marks for neat presentation) | 3 | ||
| Included sample images or swatches for each finish selected (Award 3 marks for inclusion and clarity) | 3 | ||
| Presented the wall finishes selection using interior design software or hand sketches (optional) (Award 2 marks for clear presentation) | 2 | ||
| Sub-Total | 8 | ||
| PRODUCT CHECKLIST | |||
| Final wall finishes selection document matches project specifications and client requirements (Award 10 marks for completeness and accuracy) | 10 | ||
| All room finishes are practical, durable, and aesthetically appropriate (Award 10 marks for suitability and creativity) | 10 | ||
| Wall finishes quantities and areas are correctly calculated and documented (Award 5 marks for accurate measurements and calculations) | 5 | ||
| Sub-Total | 25 | ||
| GRAND TOTAL | 80 | ||
Type: Individual
| Tools & Equipment | Materials |
|---|---|
| 3 inch flat paintbrush | |
| 6 inch paint roller with tray | |
| 1 inch angular paintbrush | |
| Painter's tape | |
| Sandpaper (medium grit 120) | |
| Putty knife 50mm | |
| Plastic drop cloth | |
| Mixing container (plastic bucket 5L) | |
| Cleaning cloth or rag | |
| Mask | |
| Dust coat | |
| Measuring tape 5m | |
| Pencil HB |
| S/N | Item | Quantity |
|---|---|---|
| 1 | 3 inch flat paintbrush | 1 Pc per Candidate |
| 2 | 6 inch paint roller with tray | 1 Pc per Candidate |
| 3 | 1 inch angular paintbrush | 1 Pc per Candidate |
| 4 | Painter's tape | 5 meters per Candidate |
| 5 | Sandpaper (medium grit 120) | 1 sheet per Candidate (230mm x 280mm) |
| 6 | Putty knife 50mm | 1 Pc per Candidate |
| 7 | Plastic drop cloth | 2.5m x 2.5m per Candidate |
| 8 | Mixing container (plastic bucket 5L) | 1 Pc per Candidate |
| 9 | Cleaning cloth or rag | 2 Pcs per Candidate |
| 10 | Mask | 1 Pc per Candidate |
| 11 | Dust coat | 1 Pc per Candidate |
| 12 | Measuring tape 5m | 1 Pc per Candidate |
| 13 | Pencil HB | 1 Pc per Candidate |
| Items to be Evaluated | Marks Available | Marks Obtained | Comments |
|---|---|---|---|
| TASK 1: Preparation and selection of tools and equipment | |||
| Candidate wore Personal Protective Equipment (Mask and Dust coat) (Award 3 marks for correct PPE usage) | 3 | ||
| Candidate measured and confirmed wall dimensions correctly (4000mm x 3000mm) (Award 4 marks for accurate measurement) | 4 | ||
| Candidate selected appropriate paintbrushes and roller suitable for wall size (Award 5 marks for correct tool selection) | 5 | ||
| Candidate prepared painter’s tape and masking to protect edges (Award 4 marks for proper tape preparation) | 4 | ||
| Candidate prepared drop cloth to protect floor and furniture (Award 3 marks for correct drop cloth usage) | 3 | ||
| Candidate selected sandpaper and putty knife for surface preparation (Award 3 marks for appropriate surface preparation tools) | 3 | ||
| Candidate prepared mixing container and cleaning cloths (Award 3 marks for readiness of mixing and cleaning tools) | 3 | ||
| Sub-Total | 25 | ||
| PRODUCT CHECKLIST | |||
| All tools and equipment are appropriate and sufficient for painting a 4000mm x 3000mm wall (Award 10 marks for completeness and appropriateness of selected tools and equipment) | 10 | ||
| Sub-Total | 10 | ||
| GRAND TOTAL | 35 | ||
At the start of this chapter we promised you would be able to:
Tick each one you can genuinely do.
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