Exterior Painting Bids: Weather and Surface Scope

For an illustrative exterior repaint, the front siding looks sound from the driveway. Up close, the west wall is chalky, porch trim is soft, and the detached garage is aluminum. One “wash and two coats” price would hide three different preparation and coating decisions.

Build the bid around labeled surfaces and a workable application window. The crew should know both what the price includes and when conditions require a pause.

Make an elevation record

Label each elevation and separate trim, doors, garage, railings, or alternates. On the site assessment checklist, record the substrate, existing coating, visible deterioration, access, photos, and tests actually performed. Distinguish observed facts from customer history and inaccessible areas.

Use the site-visit guide to capture those limits. A moisture-meter photograph needs a location, material, instrument, and method; it does not diagnose a concealed leak.

The National Park Service's dated Preservation Brief 10 explains why exterior wood paint problems can recur when moisture causes remain unresolved. Use that principle to identify a repair hold, not to promise that paint will correct a wet wall.

Specify preparation and the actual coating system

The painting quote should define washing, loose-coating removal, sanding, caulk joints, patch limits, repairs, primer, finish, protection, and cleanup by surface. State whether full stripping or resurfacing is included. “Prep as needed” does not tell the customer which result was priced.

PCA's Industry Standards, including P14, distinguish preparation levels and their appearance implications. Translate the chosen scope into plain tasks rather than merely adding a standards reference.

Keep a product schedule in the scope attachment: area, substrate, preparation, primer, finish line, color, sheen, coats, and controlling label or data sheet. Check the actual product documents before applying a substitute.

Two manufacturer examples show why one weather rule will not do:

• Benjamin Moore Aura Exterior Satin N631's data sheet distinguishes substrate and primer directions and warns that cool, humid conditions extend drying and recoat times.
• Sherwin-Williams Duration Exterior Satin's data sheet includes product-specific temperature, dew-point, precipitation, and recoat requirements.

Those are examples, not interchangeable instructions. Verify the selected primer, repair material, finish, substrate, and color restrictions as a system.

Define a workable day

A forecast helps plan the crew; the work area must also meet the product requirements. Record relevant air and surface temperature, moisture, humidity or dew point where required, precipitation risk, wind, sun exposure, product, coat, and start or stop time. Do not invent readings.

The painting work order should say who checks conditions and which limits control. Explain the estimated workable days, ordinary resequencing included, customer notice, protection of incomplete work, and approval needed for unusual enclosure, acceleration, or remobilization costs.

If the completion window becomes unreliable, issue a schedule change notice with the affected areas, restart conditions, and next update. A weather clause creates a communication process, not an unexplained absence or automatic fee.

Keep hazardous work and repairs visible

Screen planned paint disturbance before pricing ordinary preparation. EPA's RRP contractor guidance covers many paid renovations in pre-1978 housing and child-occupied facilities. Confirm the applicable program, determination, qualifications, containment, cleanup, and records before disturbance.

Worker protection is separate: OSHA's construction lead standard addresses covered occupational exposure. RRP compliance does not replace it. Price the actual access and protective methods rather than assuming a small paint quantity means simple access.

When scraping reveals rot or other unresolved damage, follow the hidden-condition workflow. Document the condition, protect the area, establish responsibility, and obtain the change order before added repairs.

Agree on acceptance before painting

Define the approved colors, sheen, surfaces, preparation result, samples where useful, viewing conditions, and existing defects that remain. Keep product and workmanship warranties distinct. Use the completion sign-off for completed areas, punch items, care instructions, and exclusions.