Slabs & Pads in Vail: a complete guide
This page covers how Slabs & Pads work for residential properties in Vail — RV pads, shed pads, mechanical pads, and garage floors — and how we plan for conditions such as high-altitude freeze-thaw, deep frost, snow loads, and UV at altitude that hammers sealer and color.
What a slab or pad has to do
Slabs and pads cover a wide range of jobs on a Vail residential lot — parking an RV or boat, supporting a shed or barn, holding an air-conditioning condenser or generator, or serving as the finished floor of a detached garage. Each one has a different load profile, and the slab section, base, reinforcement, and connection details follow that load profile.
The single biggest mistake we see on retrofit slab work is a generic 4-inch unreinforced slab placed without regard to what it will actually carry. An RV pad poured that way will fail under axle loads in the first season. A mechanical pad poured that way will settle differentially under a heat pump. We engineer the section to the use.
Subgrade and base for each pad type
Subgrade prep is sized to the load. RV pads, garage floors, and other loaded slabs get a deeper compacted aggregate base — 6 to 8 inches of proof-rolled aggregate is typical — over a stripped and evaluated native subgrade. Shed pads and light mechanical pads can run on a thinner base where soils are good.
On Vail lots where high-altitude freeze-thaw, deep frost, snow loads, and UV at altitude that hammers sealer and color is in play — expansive clay, soft fill, or buried debris from previous work — we over-excavate the bad material and replace with engineered fill before any forming. Putting a slab over a question-mark subgrade is how slabs end up compromised from the bottom up.
Vapor barrier, reinforcement, and slab section
Vapor barrier matters whenever the slab will be enclosed or conditioned. A detached garage that will eventually be heated or finished gets a 10-mil vapor barrier under the slab. A shed pad or open RV pad does not. We ask the question on the site walk so the right detail goes in before the pour.
Reinforcement is welded wire fabric chaired to mid-slab for general-use pads, or #4 rebar on a tied grid for loaded slabs like RV pads, garage floors, and equipment pads. Slab thickness scales with the load — 4 inches for sheds and light mechanical, 5 to 6 inches for garages and RV pads.
Connection details and embeds
Slabs that support a structure need the connection planned before the pour. Outbuilding stem walls, post-frame column bases, ICF wall foundations, and anchor bolts for sill plates all have to be in the right place when the concrete is going down. We coordinate with the structure — supplier drawings for a shed kit, the engineer for an ADU, the post-frame builder for a barn — so embeds and anchor patterns are set before the truck arrives.
Isolation joints separate the new pad from any adjacent structure that should move independently — the house foundation, an existing driveway, or an existing slab — so the new pad does not telegraph movement from the adjacent element.
Pour, finish, and cure
Finish is matched to use. RV pads and outdoor pads get a broom finish for traction. Garage floors get a hard-troweled finish for a dense, sealable surface. Mechanical pads get whatever finish works under the equipment — usually a tight broom.
Cure is managed against the weather and the slab type. Garage floors get extra attention because the finished surface will eventually be sealed, painted, or coated, and any flash drying or finishing damage will show up in the final coating.
Permits and inspections in Vail
Slab-only work for a pad at grade often does not require a permit, but a slab that will serve as the foundation of a structure — a detached garage, an ADU, a barn — does. We confirm the permit path with the jurisdiction before the schedule is set, and we coordinate inspection of base, vapor barrier, and reinforcement before the pour when the project is permitted.
On Vail projects that involve a separate structure, we work alongside the builder and the inspector so the slab is signed off before framing begins.
How to get started with Glenwood Springs Concrete in Vail
We start with a site walk to identify what the slab will support, where it will sit on the lot, and what the existing grade and soils look like. From there we produce a written proposal that specifies pad dimensions, thickness, base depth, reinforcement, finish, and any required embeds or connections.
After the proposal is signed we coordinate any permit work, schedule the dig and base prep, and pour against a confirmed weather window. The finished pad is handed off with mix tickets, cure records, and connection documentation as applicable.
Frequently asked questions — Slabs & Pads in Vail
- How thick should an RV pad be in Vail? Residential RV pads are typically 5 to 6 inches over a 6 to 8 inch compacted aggregate base, with #4 rebar on a tied grid. Concentrated axle loads from a fully loaded coach drive the thicker section and reinforcement schedule.
- Do I need a vapor barrier under a garage floor? If the garage will ever be heated, finished, or used as living or workshop space, yes — we place a 10-mil vapor barrier under the slab. A truly cold detached garage that will never be conditioned can run without, but most homeowners choose to put the barrier in for future flexibility.
- Can the same pad support both a shed and an RV next to it? Usually we pour these as two separate pads with an isolation joint between them, because the load profiles are different and they will move differently. The shed sits on a lighter section, the RV sits on a heavier section, and the joint lets each behave on its own.
- How long before I can park the RV or set the shed? Light loads — a shed, a generator, or a tool — can go on at 7 days. Concentrated loads like an RV or a heavy mechanical unit should wait the full 28-day cure window so the slab is at design strength before it carries the load.
- Can you tie the new slab into an existing concrete? Yes — we either dowel in for structural continuity or use an isolation joint where the slabs should move independently. The choice depends on how the two slabs will be used and the condition of the existing concrete.