On new construction the plumbing goes in before anyone can see it and stays there for the life of the building. There is no second chance at drain slope, vent layout, or pipe routing once the slab is poured and the walls are closed. That is why the rough-in stage deserves more attention than it usually gets, and why having the same company handle plumbing, HVAC, and electrical keeps three trades from competing for the same joist bay.
Underground and Slab Work
On a slab home the drain, waste, and vent system is laid, sloped, tested, and inspected before concrete. Every fixture location is fixed at that moment. Getting the stub-out positions right against the actual cabinet and fixture dimensions, rather than against a plan drawn at a different scale, is what prevents a toilet flange landing four inches from where the wall ended up. We pressure test underground lines before the pour, because a leak found under concrete later is the most expensive plumbing problem there is.
Above-Slab Rough-In
Once framing is up, supply lines, remaining drain and vent, and fixture rough-ins go in. Heights matter and are unforgiving: shower valve depth set for finished wall thickness, tub spout and shower arm heights, sink stub-outs positioned for the specific vanity, hose bibb locations, and the water heater location with its relief discharge and drain pan planned rather than improvised. Everything gets pressure tested and inspected before insulation and drywall.
Building for Coastal Louisiana
Raised construction puts supply lines in unconditioned space, which means they need protection for the handful of freezing nights we get each winter, and that protection has to be designed in rather than added later. Elevation requirements affect where the water heater and mechanical equipment can sit. Soil that settles argues for careful bedding and support of underground lines so a belly does not develop in five years. Humidity means condensation on cold lines, so insulation is not just about heat loss.
Coordinating the Trades
The reason to bundle mechanical, plumbing, and electrical is that they all want the same routes. A drain stack, a duct chase, and a home run of circuits will collide in a joist bay unless someone planned it, and whoever gets there last cuts something they should not. When one company owns all three, that conflict gets resolved on paper. Our remodel and construction page covers how we work with builders and general contractors.
Inspections and Handover
We handle the inspection sequence rather than leaving it to the builder to chase, and at trim-out we set fixtures, connect appliances, pressure and function test everything, and walk the system with you or the builder so shutoff locations are known before anyone needs them. Louisiana license 40204, in business since 1967, 4.9 stars across more than 200 Google reviews. Call (985) 632-6428 to get us involved at the plan stage.
