Flooring in Jarrell, and What Sits Under It

The youngest housing on this list

Jarrell sits at the northern end of the corridor on I-35, and its housing is newer than anywhere else we work. The majority of it has gone up within the last fifteen years and a good deal of it inside the last five.

That produces an unusual flooring situation. Most of our work elsewhere involves replacing something that has worn out. Here, a lot of it involves replacing something the buyer never wanted in the first place — builder-grade carpet and entry-level vinyl in a house that is otherwise brand new.

Which brings the substrate question forward much earlier than usual.

A new slab is not automatically a ready slab

Concrete keeps releasing moisture for months after it is poured. On Taylor Marl clay, which holds water and does not help a slab dry from below, that process runs longer than it would over limestone.

So when the owner of a two- or three-year-old Jarrell house wants glued-down plank instead of the builder’s carpet, the in-slab relative humidity reading is genuinely the deciding factor — not the material, not the budget.

Probes go into the slab and stay there the full 72 hours that ASTM F2170 specifies. A probe read early reads low, which is the dangerous direction: it tells you the slab is drier than it is and you bond a floor down on the strength of it.

You keep the number. Every adhesive has a published limit and nearly every manufacturer warranty is conditional on documented substrate moisture at the time of installation.

Where the reading is above the limit, an epoxy moisture mitigation coating goes down first. It is a real cost and it is the line most competing quotes omit, because it only exists once somebody has tested. This is one of the addresses where we most often come back with “not yet, and here is the number”.

Movement, and what to put down

Jarrell is on the eastern, clay side of the escarpment, so the ground swells through a wet season and shrinks through a dry one. Post-tension slabs are standard and they work — the design keeps the slab acting as a single stiff plate over soil that will not stay still.

The plate still moves, and the finish floor has to accommodate that:

Floating rigid-core plank is the sensible default. Not bonded to the slab, so it rides the movement rather than reporting it. In a young house where an owner may want to change again in a decade, it is also the easiest floor to take back up.

Under tile, a crack-isolation membrane belongs in the specification. A slab crack telegraphs through a bonded rigid field. The membrane is a line item on our estimate rather than an upsell in conversation.

Very few surprises at tear-out

The one genuinely easy thing about Jarrell. In a house this new there is a single original floor and nothing underneath it but slab — no layers, no old adhesive residue, no felt-backed sheet vinyl to test, no second generation of tack strip.

That makes tear-out fast and predictable, and it means more of the budget goes into the new floor and the preparation rather than into removing somebody else’s previous work. It is worth saying because it genuinely changes the shape of the estimate compared with a Brushy Creek or a Lakeway job.

Access

Jarrell is at the far northern edge of our service area. We cover it, and we are straightforward about what that means for multi-day work: a sand and finish requires being on site on consecutive days including the coating days, and that is a scheduling reality worth agreeing up front rather than discovering.