Exterior painting built for altitude, chinooks and freeze-thaw.
At 5,430 feet with the Flatirons directly west, coatings here take a beating that a Denver crew does not plan for. The preparation is the product.
- Siding, trim, fascia, soffit, doors and garage doors
- Wood, cedar, fiber cement, hardboard, stucco and brick
- Premium exterior lines specified by elevation and exposure
- Written 5-year workmanship warranty
Boulder CO Painters provides exterior house painting across Boulder County. Every exterior begins with washing, scraping to a sound edge, sanding transitions, filling and caulking, and priming bare or stained substrate before any finish coat. Boulder sits at roughly 5,430 feet with direct western exposure to the foothills, so ultraviolet intensity and downslope chinook winds shorten coating life here compared with the plains, and product selection changes elevation by elevation.
Four forces working on your siding
Exterior paint does not simply wear out. It is taken apart by specific, identifiable forces, and in Boulder four of them compound.
- Ultraviolet at altitude. UV intensity rises as the atmosphere thins. Boulder sits roughly 200 feet above downtown Denver with nothing between the foothills and your west wall. UV breaks down the binder that holds pigment together, which is what produces fading and chalking.
- Chinook winds. Downslope winds accelerate out of the canyons and across town, sometimes violently. They dry coatings faster than the manufacturer intended and drive grit into film that has not yet hardened.
- Freeze-thaw. Water entering through an open caulk joint expands as it freezes. Repeat that several dozen times a winter and the film lifts from the substrate. This is why caulking is structural work, not cosmetic.
- Snow reflection. Fresh snow bounces ultraviolet light back upward onto lower walls, trim and the underside of eaves. Those areas routinely fail before anything above them does.
Reading your own house
| What you see | What it means | What it needs |
|---|---|---|
| Powder on your hand after touching a sunny wall | Chalking. UV has destroyed the binder | Thorough washing, then full repaint. Coating over chalk guarantees failure |
| Fading only on south and west walls | Directional UV load, entirely normal here | Repaint, with a higher-grade product specified on those elevations |
| Paint peeling in sheets | Moisture behind the film, or no primer on bare wood | Find the water source first. Then scrape, prime, repaint |
| Failure only at the bottom courses | Sprinkler spray or grade contact | Adjust the irrigation. Cheapest fix on this list by far |
| Gray, fuzzy cedar | UV has broken down the surface fibers | Clean, brighten, sand, then a stain system rather than paint |
| Blistering on sunny walls | Painted over damp substrate, or applied into direct heat | Scrape, dry the substrate, prime, repaint in better conditions |
When we will and will not work
The practical exterior window in Boulder runs from about mid-May to early October. Denver-area climate records put the average last spring freeze near May 5 and the first fall freeze near October 7, and Boulder's elevation tightens both ends. Above town, toward Nederland, it narrows considerably further.
The limiting number is the overnight low, not the afternoon high. A coating applied at a pleasant 65 degrees still has to cure through the night, and if the temperature drops below the product's minimum before the film knits together, adhesion suffers in ways that do not appear for a year. We will move a date rather than paint into a bad window. The full data is on our season and altitude page.
Other work we do in Boulder County
Interior painting
Boulder's exterior season is short. The inside of your home does not care what the overnight low is, which is
Read more →02Historic homes
Mapleton Hill and Whittier are not ordinary repaints. There is a review board, a federal rule about lead, and
Read more →03Cabinet refinishing
If the boxes are sound, replacing them is mostly throwing away good cabinetry. Refinishing costs a fraction an
Read more →04Deck and fence staining
High-altitude sun takes wood apart faster than most homeowners expect. Sealing on schedule is maintenance. Wai
Read more →Exterior painting questions from Boulder homeowners
When can you paint the outside of a house in Boulder?
How much does exterior painting cost in Boulder?
Is ultraviolet damage really worse at Boulder's elevation?
What do chinook winds do to fresh paint?
My home is in a historic district. What changes?
How long does an exterior project take?
Get a written estimate
Send photos and we will price it without a visit where we can. Peeling, water damage or a landmark property gets a walkthrough first.
Every estimate names the surfaces, the preparation steps, the exact product line and sheen, the coat count, the schedule and the warranty. Nothing vague.
Prefer to talk? 720-208-5645, seven days.