Frequently Asked Questions — Concrete & Pressure Washing in St. Louis
20 questions answered by BTS Outdoor Solutions & More — 31 years of concrete and pressure washing experience in the St. Louis area.
What Questions Do You Have About Concrete Cleaning and Pressure Washing?
Technique differences, frequency, and what to expect from a professional concrete cleaning job in St. Louis.
4Pressure washing uses 1,500–4,000 PSI for hard surfaces like concrete, brick, and stone. Soft washing uses 40–80 PSI with biodegradable detergents for roofs, siding, wood, and older brick where high pressure would cause damage.
Annually is ideal for most St. Louis driveways — spring cleaning after winter grime, or fall cleanup after leaf season. Properties near trees benefit from twice-yearly cleaning.
High pressure applied incorrectly can etch or scarify concrete surfaces, especially older or unsealed concrete. We adjust pressure and tip selection based on your surface type and condition. We've been doing this for 31 years — we know the difference between a 3,500 PSI turbo nozzle on new concrete and on a 20-year-old unsealed driveway.
Most residential driveways take 1–3 hours. Large patios or commercial areas vary by scope. We provide time estimates with every free quote — no surprises on the day of service.
What Questions Do You Have About Concrete Sealing?
Best timing, lifespan, crack treatment, and what sealing actually protects against in Missouri's climate.
5Late spring (May–June) or early fall (September–October), when temperatures stay consistently between 50°F and 90°F. Never seal when rain or freezing temperatures are forecast within 24 hours of application.
Penetrating/silane sealers: 5–7 years. Topical/acrylic sealers: 2–4 years. Missouri's freeze-thaw cycles are hard on topical sealers — we typically recommend penetrating sealers for St. Louis driveways and walkways exposed to road salt.
Minor cracks should be caulked or filled before sealing. We assess crack severity on every sealing estimate — some cracks are cosmetic, others indicate base failure that sealing won't fix. We'll tell you honestly what your concrete actually needs, even if that means recommending a repair over a sealer.
Freeze-thaw damage (water penetrating pores, freezing, expanding — the main cause of spalling in St. Louis), oil and chemical staining, UV degradation, and salt/deicing chemical damage. St. Louis winters are particularly hard on unsealed concrete — a single application pays for itself many times over in avoided replacement costs.
New concrete should cure for at least 28 days before applying a sealer. For penetrating sealers, 90 days is ideal to allow full concrete hydration. We'll tell you exactly when to schedule sealing on new pours — rushing it traps moisture and causes delamination.
What Questions Do You Have About Driveways, Patios, and Retaining Walls?
Lifespan, permits, engineering considerations, and what to expect from concrete construction in the St. Louis area.
325–40 years with proper installation and maintenance. Missouri's freeze-thaw cycling is the biggest lifespan variable — unsealed driveways deteriorate significantly faster than sealed ones. The difference between a 25-year driveway and a 40-year driveway is typically proper base prep and sealing within the first year.
Requirements vary by municipality. Some St. Louis County municipalities require permits for full replacements but not for repairs. We're familiar with local requirements across Kirkwood, Clayton, Chesterfield, Ballwin, and the City of St. Louis — we help clients navigate the process so no surprises delay your project.
Yes. We've built retaining walls on challenging grades throughout Ballwin, Wildwood, Fenton, and other hilly St. Louis suburbs. Steep sites require precise engineering — footing depth, batter, drainage, and sometimes tiered walls rather than a single tall wall. We assess the grade and soil condition before quoting.
What General Questions Do You Have About BTS Outdoor Solutions?
Paver restoration, polymeric sand, licensing, subcontractors, and how to get a free estimate in St. Louis.
5In most cases, yes. Re-leveling, polymeric sand replacement, and sealing restores most aging paver systems at 60–80% less than full replacement. We assess sub-base condition honestly — if the base has failed, we'll tell you instead of taking your money on a repair that won't last.
Polymeric sand is a joint-filling sand that contains a polymer binder. When activated with water, it hardens and resists weed growth, ant intrusion, and washout — problems that plague regular sand joints. It's the standard we use on every paver project, not an upgrade.
Yes. BTS Outdoor Solutions is licensed by the State of Missouri and carries full general liability insurance on every job. We're also A+ BBB rated. We're happy to provide proof of insurance before any project begins.
Never. Every BTS Outdoor Solutions project is performed by our own trained crew from start to finish. No subcontractors, no handoffs. The same people who give you your estimate are the people who show up to do the work.
Call (314) 662-2505, call our secondary line at (314) 662-2505, or fill out the contact form at btsoutdoor.com/contact. We respond within 2 hours during business hours (Mon–Sun, 6 AM–6 PM).