# Job Hazard Analysis: Staining and sealing URL: https://hardhatbinder.com/en/jha/painting/staining-sealing Last updated: 2026-10-23 Cleaning, sanding, staining, and sealing exterior wood such as decks, railings, fences, and siding with oil-based or water-based stain and clear sealer. Work uses a pressure washer, deck cleaner, random orbital sander, pump sprayer, rollers, brushes, and a 6-ft fiberglass stepladder. Mostly outdoors, often in sun and heat. Interior trim staining follows the same steps, with added ventilation. > A general example for this task. Your JHA should reflect your crew, equipment and site — review it with a competent person before work starts. ## Steps, hazards and controls ### 1. Set up the work area: walk the site, read the SDS for the cleaner, stain, and sealer, cover plants and surfaces, and stage materials. - **Not knowing the chemical hazards of the stain, sealer, or deck cleaner** (Medium): Choose water-based stain and sealer when the job allows; they give off fewer vapors and are less flammable.; Foreman reviews the SDS with the crew before opening any can: fire risk, PPE, and first aid.; Keep every container labeled. If you pour into another bucket, label it. - **Trips and back strain carrying 5-gal pails, drop cloths, and the pressure washer** (Low): Use a hand truck or dolly for the pressure washer and full pails.; Pick a clear path; tape down drop cloth edges and keep hoses to one side.; Lift with your legs; get a second person for anything over 50 lb. ### 2. Clean the wood with deck cleaner or brightener and the pressure washer. - **Chemical burns to eyes and skin from bleach, sodium percarbonate, or oxalic acid cleaners** (Medium): Mix cleaner exactly as the label says; never mix bleach with acid or ammonia products.; Keep a jug of clean water or an eyewash bottle at the work area.; Wear chemical splash goggles, nitrile gloves, long sleeves, and rubber boots while mixing and applying. - **Injection cuts and flying debris from the pressure washer stream** (High): Use the widest tip that does the job (25° or 40°); never use the 0° red tip on wood.; Never point the wand at a person or your own hand or foot; lock the trigger when you stop.; Keep other people at least 15 ft away while spraying.; Any pressure washer cut goes to the ER right away, even if it looks small. - **Electric shock from an electric pressure washer or cords in standing water** (Medium): Plug into a GFCI outlet or a portable GFCI and test it before use.; Inspect cords for cuts; keep plug connections up off the wet deck. - **Slipping on wet, slimy deck boards** (Medium): Work from the far end back toward the exit so you do not walk on cleaned, wet wood.; Wear slip-resistant boots; do not stand near open deck edges or stairs while spraying. ### 3. After the wood dries, sand rough spots, set popped nails or screws, and blow or sweep off dust. - **Wood dust in eyes and lungs from the random orbital sander** (Medium): Use a sander with a dust bag or hooked to a HEPA shop vac.; Stand upwind and keep others out of the dust cloud.; Wear safety glasses and an N95 dust mask when sanding. - **Splinters, nail heads, and cuts on hands** (Low): Walk the deck and set or pull raised nails before sanding.; Wear work gloves when handling boards and sanding. - **Noise from sander and leaf blower** (Low): Use a broom or shop vac instead of a gas blower when you can.; Wear earplugs or earmuffs while running the sander or blower. ### 4. Open, mix, and pour stain or sealer into pump sprayers, buckets, and roller trays. - **Fire from flammable oil-based stain or mineral spirits vapors** (High): Mix and pour outdoors, at least 50 ft from smoking, grills, pilot lights, and running generators.; Post No Smoking; keep only one day's supply out and lids on cans when not pouring.; Keep a charged 2A:10B:C fire extinguisher within 25 ft of the mixing area.; Store solvents in approved, closed safety cans. - **Splashes in eyes and skin contact with stain and solvent** (Medium): Use a pour spout or funnel; stir with a paddle, not by shaking an open can.; Wear safety glasses and nitrile gloves while mixing and pouring. - **Spills on the ground, plants, or customer's property** (Low): Pour on a drop cloth or inside a spill tray.; Keep rags and absorbent at the mixing station. ### 5. Apply stain and sealer with pump sprayer, roller, and brush, working with the grain; use a stepladder for railings, posts, and siding. - **Breathing solvent vapors and overspray mist** (Medium): Roll or brush instead of spraying when practical; it makes far less mist.; Spray with the wind at your back and on low pressure; stop if wind blows overspray onto cars or houses.; In enclosed or under-deck areas, set up fans for fresh air and take breaks outside.; If spraying oil-based product or you feel dizzy or get a headache, wear a fit-tested half-face respirator with organic vapor cartridges. - **Falls from a 6-ft stepladder or off an unguarded deck edge** (High): Use an extension pole on the roller or brush to stay on the ground when possible.; Inspect the fiberglass stepladder before use; set it fully open and locked on firm, dry ground, not on wet stain.; Do not stand on the top cap or top step; keep three points of contact and move the ladder instead of reaching.; Stain toward the exit so you never back toward the open deck edge. - **Slipping on freshly stained boards** (Medium): Plan the order so you finish at the stairs or exit and never walk on wet stain.; Tape off or block access and post a Wet Stain sign. - **Heat illness working in direct sun on hot decks** (Medium): Schedule staining for early morning or shaded sides of the house; stain also goes on better on cool wood.; Drink water every 15–20 minutes and take shade breaks; new workers build up time in the heat over the first week.; Watch each other for dizziness, confusion, or stopping sweating; stop and cool down right away. ### 6. Clean up: dispose of oily rags, clean tools, close containers, and remove drop cloths and tape. - **Spontaneous fire from oily rags, pads, and drop cloths soaked with oil-based stain** (High): Put used rags in a metal oily-waste can with a self-closing lid, or lay them flat outside to dry, or soak them in water in a sealed metal can.; Never leave balled-up rags in a truck, garage, trash bag, or in the sun.; Foreman checks rag disposal before the crew leaves the site. - **Skin and eye contact with mineral spirits when cleaning brushes and sprayers** (Low): Clean water-based tools with water; use solvent only for oil-based products.; Release pressure from the pump sprayer before opening it.; Wear nitrile gloves and safety glasses while cleaning tools. - **Improper disposal of leftover stain, solvent, and cleaner** (Low): Never pour stain or solvent on the ground or down a drain; close cans tight and return them to the shop.; Pick up tape, drop cloths, and debris so no one trips. ## Required PPE - Safety glasses — ANSI Z87.1 with side shields at all times. - Chemical splash goggles — When mixing or applying deck cleaner and when spraying overhead. - Nitrile gloves — When handling cleaner, stain, sealer, or solvent; change if torn. - Half-face respirator with organic vapor cartridges — When spraying oil-based product or working in enclosed areas; requires medical clearance and fit test. - N95 dust mask — While sanding and sweeping wood dust. - Slip-resistant work boots — All day; rubber boots during pressure washing. - Hearing protection — Earplugs or earmuffs while running the pressure washer, sander, or blower. - Long sleeves, long pants, and wide-brim hat — Light-colored clothing to protect skin from stain and sun. ## Training - Hazard communication: reading labels and SDS for the stain, sealer, cleaner, and solvents used on this job. - Ladder safety training: inspection, setup, and safe use of stepladders. - Respirator medical evaluation, fit test, and training before wearing a half-face respirator. - Pressure washer operation, including tip selection and injection-injury hazards. - Fire extinguisher use and safe handling, storage, and disposal of flammable liquids and oily rags. - Heat illness recognition, prevention, and first aid. ## Emergency Fire: stop work, shout a warning, and get everyone away and upwind. Call 911 and give the job site address. Use the extinguisher only on a small fire with a clear exit. Stain in eyes: flush with clean water for 15 minutes. Fall or pressure washer cut: do not move a seriously hurt worker, call 911, and give first aid until help arrives. ## Official sources - [29 CFR 1926.59](https://www.ecfr.gov/current/title-29/section-1926.59) — Hazard communication - [29 CFR 1926.152](https://www.ecfr.gov/current/title-29/section-1926.152) — Flammable liquids - [29 CFR 1926.150](https://www.ecfr.gov/current/title-29/section-1926.150) — Fire protection - [29 CFR 1926.55](https://www.ecfr.gov/current/title-29/section-1926.55) — Gases, vapors, fumes, dusts, and mists - [29 CFR 1926.1053](https://www.ecfr.gov/current/title-29/section-1926.1053) — Ladders - [29 CFR 1926.102](https://www.ecfr.gov/current/title-29/section-1926.102) — Eye and face protection - [29 CFR 1926.25](https://www.ecfr.gov/current/title-29/section-1926.25) — Housekeeping - [OSHA](https://www.osha.gov/heat-exposure) — Heat — hazard recognition and prevention --- Source: HardHat Binder, operated by Leadspire LLC. Templates to be reviewed by a competent person before use; not legal advice; not affiliated with OSHA.