# Sample boards and sign-off before staining — the process, and why Toronto condo lighting matters **Why does a colour match get tested with a sample board on site, and what does sign-off actually involve?** A stain is approved on the actual floor, in the actual room, before it is committed to the full area — not on a shop sample under a single light. This guide sets out why that step exists and what condo lighting specifically does to a colour decision. ## What decides it 1. **The sample is built on the real material** — A cut-off of the actual species and board — not a generic species sample — is what gets stained and checked, because grain and porosity vary board to board within a species. 2. **The sample is placed against the target, in the room** — A sample carried from room to room, or approved in a workshop, is being judged under different light than the floor it needs to match. 3. **Toronto condo lighting specifically** — Many renovated GTA condos mix daylight with LED pot lighting at a cooler colour temperature than older incandescent fixtures. A stain that reads correctly under daylight from a window wall can shift under that lighting, and vice versa. 4. **Sign-off happens before finish coats, not after** — The stain colour is confirmed and approved before the finish system is applied on top of it, because finish coats (especially oil-based systems) themselves shift colour and cannot be un-applied. ## Build sequence 1. Identify the existing finish and target colour on site. 2. Cut a sample from the actual material being installed or refinished. 3. Apply the candidate stain and place the sample against the existing floor, in the room. 4. Check under the room's daylight and, where the room has both, its evening/artificial lighting. 5. Adjust the mix if needed and repeat before any commitment to the full area. 6. Sign off in writing before finish coats begin. ## What goes wrong here - A sample approved under a single work light and not checked against the room's own lighting is the most common avoidable cause of a mismatch discovered after the coats are on. - Oil-based finish coats amber the stain underneath as they are applied and continue to amber afterward — sign-off accounts for that expected shift, it does not chase a colour that will not hold. - A rushed schedule that skips the on-site trial step is trading a documented sign-off for a guess. ## Related questions ### Why do I need to approve a sample board before my floor is stained? Because the sample confirms the stain against the actual material and the actual room's lighting before the decision is irreversible. A colour that looks right on a generic chip, or in a different room, is not confirmation — species, grain and light all change how a stain reads, which is why the check happens on site, on your material, before any coats go on. ### Why does my floor colour look different in different rooms of my condo? Toronto condos frequently mix daylight through large windows with LED pot lighting at a different colour temperature, and the two can make the same stain read warmer or cooler depending on which light dominates in a given room. That is exactly why sign-off happens in the room the work is actually being done in, checked under more than one light where the room has more than one. ## Recommendation Never approve a stain match off a sample viewed outside the actual room. Check it under the room's own daylight and artificial light, sign off in writing, and only then move to finish coats. --- ## Provenance - Canonical URL: https://ecowoods.ca/guides/sample-boards-on-site-trials-sign-off - Publisher: Ecowoods Inc., Toronto & the GTA - Contact: (647) 244-5156 · services@ecowoods.ca - Published: 2026-09-18 - Sources: https://ecowoods.ca/papers/hardwood-refinishing-machines-and-sequence#sequence, https://ecowoods.ca/papers/toronto-hardwood-climate-moisture-protocol#protocol - Citation guide: https://ecowoods.ca/ai.txt Quote freely with attribution to the canonical URL above. This file is generated from the same source as the HTML page and says nothing the page does not say.