Pressure washing in Longmont is for hard surfaces — driveways, walks, patios, and hardscape — and it is deliberately not for everything. Siding, painted surfaces, and anything with a seam get soft washing instead, because high pressure drives water behind the surface and forces it into places it does not dry out of.
Quick answer
Pressure washing uses high-pressure water (~3,000 PSI) to remove dirt, mildew, and stains from durable hard surfaces.
The checklist is the same everywhere. What is on your glass is not. These are the conditions that actually shape this job in Longmont — each one is true here and false in plenty of other towns we serve.
Colorado runs magnesium chloride de-icer on its roads all winter, and it comes home on tires and boots. It soaks into driveway and garage-apron concrete, pulls moisture, and accelerates surface scaling — the pitted, flaking texture that makes an eight-year-old Longmont driveway look twenty. A spring wash that removes accumulated chloride before the freeze-thaw season is finished doing its work is genuinely preventive maintenance rather than a cosmetic service.
Working ground around Longmont — fields being disked, hay operations, dairies, unpaved lanes and riding arenas — puts fine dust into the air on the farming calendar rather than the weather calendar. Homeowners assume they are seeing the effect of a wind event and time their cleaning around storms, which never quite works, because the dust does not wait for wind. Recognizing the actual source changes the answer from "clean after wind season" to "clean three times a year regardless," and that is what keeps the glass looking right.
Hard-surface pressure washing — concrete driveways, sidewalks, brick or stone patios, stamped concrete, paver walkways. ~3,000 PSI hot-water pressure removes oil stains, ground-in dirt, and biological growth.
Soft-wash service — for siding, stucco, painted wood, and any surface that won't survive high pressure. ~500 PSI with a biocidal cleaning solution.
Composite/wood deck cleaning — different solution and pressure for each material; we won't blast away the protective finish.
Fence cleaning — wood, vinyl, or composite. Pre-paint prep is a common request.
Garage floor degreasing — hot-water pressure plus an oil-cutting detergent.
Enter your address. Our autoquoter sizes the property and returns a pressure-wash price. We'll confirm the surfaces and any add-ons when scheduling.
Lead tech identifies what's pressure vs. soft-wash, flags any surfaces we won't touch (brick mortar in poor condition, peeling paint), and sets up appropriate plant/landscaping protection.
Surface-appropriate biocide for soft-wash; degreaser for hard-surface oil stains. Dwell time per the chemistry — we don't rush.
Hot-water pressure for hard surfaces. Soft-wash applicator for siding/stucco. Always work top-down to prevent streak lines.
Final low-pressure rinse to remove any remaining solution. Plants/lawn rinsed clean. Photos emailed showing before/after.
Most Longmont properties land between $215 and $575 for this service. That band is derived from real Longmont jobs, not a national average — which is why it differs from the number you would see on our page for a neighboring town. Here is how the job profiles break down:
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Active-adult community with sub-HOA standards.
Larger rural-style lots between Longmont and Boulder.
1970s/80s established homes with mature trees.
New construction; deep first cleans within 90 days.
Storefronts and offices; recurring commercial accounts.
1880s Victorians and Craftsman bungalows; hand-clean only on original glass.
See every neighborhood and the full local guide on our Longmont window cleaning page.
Colorado's freeze-thaw cycles work biological growth (algae, mildew) deep into porous surfaces like concrete and brick. Annual pressure washing is the practical maintenance interval; longer than that and you start losing surface integrity.
Front Range water hardness leaves mineral deposits on hardscape that look like permanent staining. Hot-water pressure with a mild acidic surfactant clears these where cold-water blasting won't.
Hail country (Boulder, Fort Collins, Loveland) — after major hail, dimpled siding and damaged shingles drop debris on patios that's easier to remove pressure-washed than left to weather.
We will clean it with a soft wash rather than high pressure. Pressure forces water behind siding and into seams, and that water does not dry out. Soft washing uses low pressure and the right solution to do the same job without the moisture intrusion. Driveways, walks, and patios are where pressure belongs.
Spring is the highest-value time in Longmont, once overnight temperatures stay above freezing. It clears the winter's accumulated road chemicals and grime before the freeze-thaw season finishes working on the concrete.
Most Denver homes run $300–$800. A typical driveway + sidewalk + porch combo is $300–$450. Full house siding (soft-wash) is $400–$700. Whole-property bundles (driveway + house + deck + fence) run $700–$1,500.
Pressure washing is high-pressure water (~3,000 PSI) for durable hard surfaces — concrete, brick, stone. Soft washing is low-pressure (~500 PSI) plus a biocidal cleaning solution for softer surfaces — siding, stucco, painted wood. Soft-wash kills algae, mildew, and bacteria; pressure-wash mostly removes dirt mechanically. The right tool for the surface — both are necessary.
It can — that's why we soft-wash siding (vinyl, fiber-cement, stucco, painted wood) instead. Soft-wash uses much lower pressure plus a biocidal cleaning solution that does the work chemically rather than mechanically.
Yes — pre-paint prep is one of our most common requests. We'll wash, dry, and (optionally) lightly scuff the surface so primer and paint adhere properly.
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