What goes wrong on a triple-decker roof?
Because so many of these buildings have flat or low-slope roofs with parapets, the trouble tends to be about water that has nowhere to run. Seams in the membrane open up, a drain clogs, or the flashing along a parapet wall pulls away and lets water behind it. A pitched roof sheds rain by gravity; a flat one depends on every seam and every drain doing its job.
Rear porches add their own joints, where a porch roof meets the back wall of the building. A stain on the third-floor ceiling may start there, or at the drain, or at a patch nobody remembers. Read the guide to flat roofs on triple-deckers for how EPDM and other low-slope systems are put together.
Who decides about the roof when the building is a condo?
Usually not one person. When a triple-decker has been split into condos, the roof is typically shared, and the condo association or the owners acting together may need to approve the work and how it is paid for. Check your condo documents before calling anyone to quote, because a roofer cannot start on a shared roof because one owner asks.
If you own the top-floor unit, you feel a leak first, but the repair belongs to everyone below it too. Tell the roofer plainly who owns the roof and who signs. A building with one landlord and three tenants is simpler: the landlord decides, and tenants should report leaks promptly in writing. Multi-family roofing explains how the process runs on a three-unit building.
How do you reach a flat roof safely to look at it?
On many triple-deckers, the way to the roof is shared. A roof hatch, a ladder or a back stair may serve all three apartments, and the roof is three stories up. Do not climb out to look for a leak yourself, especially in winter or after rain, because membrane and wet snow are slippery and the edge may be only a low parapet.
What you can do safely is photograph the ceiling stains from inside, note which unit and which room, and note when the stain grew, after which rain or thaw. Those notes tell the roofer where to start. When you call (833) 751-2102, say how many units the building has and whether the roof is flat or pitched, so you reach a roofer who does that kind of work.
Does winter change what a Somerville roof needs?
Boston averages about 43.8 inches of snow a year, and on a flat roof snow stays where it falls until it melts and has to find a drain. A drain that is blocked with leaves or debris will hold water against the membrane. Meltwater that refreezes at the edge or around a drain is a common source of winter leaks on low-slope roofs.
Ask a roofer what they check at the drains and the parapet flashing before the cold arrives, and whether the roof was left with a slope toward the drains. Published guides give very different prices for flat roofs in this region, so insist on a written scope instead of a number on its own.
