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Planning a Bathroom Remodel: What Happens Behind the Tile

October 14, 2026 Lunarstone General Construction
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When people plan a bathroom remodel they think about tile, vanities, and fixtures. Those matter, but the work behind the walls and under the floor is what decides whether the bathroom still looks good in fifteen years.

In older Maryland and D.C. homes, opening up a bathroom often reveals cast-iron or galvanized drain lines, soft subfloor around the toilet or tub, and walls with no waterproofing at all behind the old tile. All of that should be fixed while the room is open.

Waterproofing is the most important step. A shower or tub surround should have a continuous waterproof membrane behind the tile, properly sealed at niches, valves, and corners. Grout and tile alone are not waterproof.

Plan your fixture choices early. The shower valve, tub, and vanity drain locations all need to be set during rough-in, so changing your mind after the walls are closed costs time and money.

Our crew handles the demolition, plumbing, waterproofing, tile, and trim, so your remodel stays with one contractor. New customers get 10% off their first project.

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Free written estimates across Maryland, Washington D.C., and Northern Virginia. 10% off for new customers.

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Lunarstone General Construction

Lunarstone General Construction remodels kitchens and bathrooms, replaces roofs and siding, builds decks and additions, and handles plumbing and flooring from Beltsville across Maryland, Washington D.C., and Northern Virginia. English and Spanish.

10% off your first project as a new customer

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