Paint Exterior Siding on a Practice Wall

A. Finished-Project Specification

Scope: one approved exterior siding practice wall, washed, scraped, feathered, primed, and finish-coated with complete lap, edge, and field coverage, and a documented weather, preparation, and application record.

B. Substrate and Condition Schedule

Element	Verification Required	Stop-Work Trigger
Siding material and profile	Identified and recorded (lap, panel, shingle, or other approved profile)	Unknown or unrated material not addressed by the finish schedule
Existing coating	Condition recorded as sound, chalky, peeling, or failing; lead screening completed where required	Suspected lead-based paint without completed testing
Flashing, caulk joints, drainage, fasteners	Inspected and corrected before coating	Active leak, failed flashing, or blocked drainage not yet corrected
Moisture condition	Verified with a moisture meter against the product's maximum substrate moisture limit	Substrate moisture reading above the coating manufacturer's limit

C. Documentation Takeoff

• Log: one Exterior Siding Preparation and Coating Log completed in full before, during, and after application.
• Weather record: air temperature, surface temperature, humidity, and dew-point readings recorded at the start of application and at any point conditions change.
• Photographs: one photograph minimum of each substrate defect, drainage feature, and completed lap or edge detail, labeled with its log entry.

D. Acceptance Standards

Check	Standard
Weather verification	Air temperature, surface temperature, humidity, and dew point recorded and within the product's stated limits before and during application
Substrate repair	Flashing, caulk joints, drainage, fasteners, and moisture defects corrected and recorded before washing begins
Wash and dry	Siding washed by the approved low-pressure method and allowed to dry fully before scraping or coating
Scrape and feather	All loose and peeling paint removed; sound edges feathered under dust control
Primer coverage	All bare or stained siding primed with the specified exterior primer at full coverage
Lap and edge coverage	Every lap, edge, end, and profile brushed to complete coverage with no thin or missed sections
Field application	Rolled or sprayed field areas back-brushed or back-rolled for a uniform film with no dry spray, runs, or heavy edges
Drainage preservation	No weep, drainage opening, or movement joint sealed or coated shut

E. Siding Identification and Substrate Verification

1. Identify siding material, profile, existing coating, exposure, moisture condition, and product system. Record the siding material and profile, and select the exterior primer and finish system that matches it per the approved finish schedule.
2. Confirm that siding, flashing, caulk joints, drainage, fasteners, and moisture defects are repaired. Inspect each element per the Substrate and Condition Schedule and correct any defect before proceeding.

F. Weather and Hazard Verification

1. Review weather forecast, wind, surface temperature, humidity, sunlight, and dew-point limits. Record each reading and confirm the forecast covers the full application and specified cure window.
2. Test existing coatings for lead where required. Apply the Chapter 1 hazard-screening method to the siding based on structure age, location, and coating condition, and stop disturbance until clearance is documented where required.

G. Protection, Washing, and Preparation

1. Protect windows, doors, roofing, masonry, landscaping, vehicles, and adjacent property. Cover or mask every surface adjacent to the wash and coating area.
2. Wash the siding using the approved low-pressure method. Work from the top of the wall downward, holding the wash equipment at the pressure and distance specified for the siding material, and direct spray to avoid forcing water behind the cladding.
3. Allow full drying. Confirm the substrate moisture reading is within the coating manufacturer's limit before proceeding.
4. Scrape loose and peeling coating. Remove only unsound material using the hand scraper under controlled dust methods.
5. Feather sound edges using dust control. Sand the scraped edge transition smooth without cutting into sound coating.
6. Do not force water behind siding or damage the WRB. Inspect the washed and scraped area for any sign of water intrusion or barrier damage before continuing.
7. Repair minor substrate defects. Apply exterior-rated patching compound to minor dents, cracks, or gouges identified during inspection, and allow the repair to cure per the product instructions.

H. Priming and Joint Preservation

1. Prime bare or stained siding with the specified exterior primer. Apply primer to every area of exposed bare substrate or stained surface at the coverage rate stated on the product data sheet.
2. Seal only designated joints. Apply sealant only to the joints identified on the approved finish schedule.
3. Do not caulk siding laps, weeps, drainage openings, or movement gaps unless the system requires it. Confirm every drainage and movement feature remains open and unobstructed after priming.

I. Lap, Edge, and Field Application

1. Brush coating into laps, edges, ends, and profiles. Use the angled sash brush to work coating fully into every lap, cut end, and profile detail before rolling or spraying the adjacent field area.
2. Roll field areas or use controlled spray with required back-brushing or back-rolling. Apply coating to the field area using the roller or sprayer specified for the siding texture, then back-brush or back-roll immediately to press the coating into the surface profile.
3. Maintain wet edge and consistent film. Work in a planned sequence that keeps each section's edge wet until the adjoining section is coated.
4. Observe sun and wind effects on drying. Adjust the work sequence to avoid coating a wall face in direct, high-heat sun exposure where the product's open time will be shortened beyond a workable range.
5. Stop application when weather leaves product limits. Halt work immediately if surface temperature, humidity, wind, or dew-point conditions move outside the manufacturer's stated range, and record the stopping point on the log.
6. Apply additional coats after the recoat interval. Confirm the manufacturer's recoat window has elapsed before applying a second coat.

J. Inspection, Cleanup, and Documentation

1. Inspect laps, lower edges, end grain, fasteners, thin spots, overspray, and blocked drainage. Examine every lap and edge under raking light where practical, and confirm no drainage or movement feature was sealed or coated shut.
2. Remove protection and clean the area. Remove masking and protective sheeting once the coating has reached the specified touch-dry condition.
3. Document weather, preparation, primer, application, and coverage. Complete the Exterior Siding Preparation and Coating Log with every weather reading, preparation step, product used, and inspection result.