Cement Mortar Lining Crews for Water, Sewer & Industrial Pipe

R&R Contracting Utilities sends OSHA-trained crews to reline water, sewer and industrial pipe with cement mortar — the layer that keeps a corroding pipe in service instead of a construction crew digging it up. We work as subcontracted labor for general contractors, municipalities and federal agencies across Maryland and Washington, D.C. When a Maryland main needs relining instead of replacing, we're one of the crews a GC calls.

A pipe lining crew from R&R doesn't need a walkthrough on what tuberculation looks like or why a ductile iron main gets relined instead of replaced. That water main relining labor already knows the trade before the truck's unloaded.

Where Cement Mortar Lining Gets Used

Cement mortar relining works on water pipelines, sewer and stormwater systems, and industrial process pipe — three jobs with three different failure modes.

Water Pipelines

Cast iron, ductile iron and steel mains rust and tuberculate over time — rust spots build up inside the pipe and choke the flow until the main can't move the volume it's rated for. A cement mortar lining contractor resurfaces the interior wall and gives the pipe its capacity back.

Sewers and Stormwater Systems

Hydrogen sulfide gas eats concrete and steel from the inside.

Industrial Pipe

Process pipe runs into the same corrosion problem, just on an industrial company's schedule instead of a utility's. A plant shutdown window is expensive by the hour, so R&R's crews plan the relining around it rather than the other way around — arriving with materials staged and ready before the line goes down, not after.

Why Contractors Call R&R for Relining Instead of Replacement

Pipe replacement means open-cut excavation, traffic control, restoration — weeks of cost and disruption that don't show up on the relining estimate. Cement mortar lining goes inside the existing pipe wall, which is why it's the standard fix for a main that's corroding but still structurally sound.

• Works inside steel, brick, concrete, cast iron, asbestos-cement, corrugated metal and wood stave pipe — see also CIPP lining for pipe that needs a full structural liner instead
• Rebuilds the low-permeability barrier that keeps the steel substrate from corroding further
• Handles diameters of 30 inches and larger
• Resists chemical attack from wastewater, saline intrusion and potable water alike
• Costs a fraction of a dig-and-replace project for a main that hasn't failed structurally

Jennifer DiPietro Leads a Certified Crew

R&R's President and owner, Jennifer DiPietro, runs a company certified as Women's Business Enterprise (WBE), Minority Business Enterprise (MBE), Disadvantaged Business Enterprise (DBE) and Small Local Business Enterprise (SLBE) — certifications that carry through her ownership, not just a filing cabinet.

Where R&R Works

As a cement mortar lining Maryland contractor, R&R serves Washington, D.C., Baltimore, Rockville, Columbia, Annapolis, Alexandria, Gaithersburg, Frederick, Silver Spring, Bowie and the surrounding region.

Relining a Pipe? Tell Us the Diameter and Material

Contact R&R or call — a staffing coordinator will ask what diameter, what pipe material and what timeline you're working against before quoting labor for your cement mortar lining project.