Most Baltimore row home flat roof replacements fall between $8,000 and $18,000, depending on the system you choose, the condition of your existing roof, and whether any decking needs to be replaced. TPO tends to run higher upfront, while coatings are the most affordable entry point — but each comes with different lifespans and maintenance expectations.

TPO is a single-ply membrane known for durability and energy efficiency — it's heat-welded at the seams and can last 20–30 years. Rubber (modified bitumen) is a tried-and-true system that's been used on row homes in Baltimore for decades and performs well in all four seasons. Roof coatings are applied over an existing surface to seal and extend its life — they're the least invasive option but only work if the current roof is structurally sound.

Sometimes, yes — but it depends on the condition of what's underneath. If your current roof has active leaks, widespread membrane failure, or saturated insulation, a coating will trap moisture and fail prematurely. A proper inspection will tell you whether your roof is a candidate for coating or needs a full replacement.

Several factors drive the spread: the type of material specified, whether tearoff and disposal are included, the warranty offered, and how different contractors price their labor. A low quote often means something is excluded — decking repairs, proper flashing, or a meaningful workmanship warranty. Always confirm what's in scope before comparing numbers.