Flat Roof Repair in Midtown from $150. On low slope the membrane is rarely what failed. The drainage is. Free inspection and a written quote.
The whole roof is flat on much of this stock, and it sits behind a parapet with internal drainage. Three things fail in order of likelihood: the outlet blocks, the coping opens up, and the upstand at the parapet lets go. The membrane in the middle of the field is usually the last thing wrong with it.
There is a great deal of low slope on this housing -- rear extensions, porch roofs, whole roofs on older attached stock -- and what fails is almost never the middle of the field. It is the outlet, the parapet, the coping or the upstand at a wall.



Low-slope repairs sit in the same $350 to $1,800 band for most jobs, and small work starts around $150. What decides whether that money lasts is the drainage: in a freezing winter, water that cannot leave freezes in a lap and lifts it, then thaws and runs in through the gap it made. Expect access to appear as a line. A roof reached through an occupied unit, or a frontage on a busy street, is time before any work starts -- and on a parapet roof the outlet and coping are part of the job whether or not they are what you called about.
Water still standing 48 hours after rain means the fall is wrong or the outlet is blocked. We measure depth at the low points before quoting and again after, so you can see whether it moved.
The outlet, the parapet, the coping and the upstand at a wall. The middle of the membrane is usually the last thing wrong with a flat roof, and a quote that only mentions the field has not walked it.
If the fall was set wrong when it was built, patching is an annual appointment. We will say when local correction is possible and when it honestly is not.
Parapets are the Midtown story. A building with a flat roof behind a street-facing parapet fails at the coping and the upstand, not in the field, and the water appears inside on the top floor a long way from where it entered. Access is the other constraint: a roof reached only through an occupied unit changes how the work has to be arranged.
Including us. On repair work the checks are different from the ones people apply to a replacement, and cheaper to make.
The single most useful question on this page. A repair quoted from the roof alone is a repair quoted without knowing where the water traveled, and that is how a patch ends up in the wrong place. It costs nothing to ask and it separates most quotes immediately.
'Repair roof' is not a scope. 'Rebuild step flashing to the chimney, replace two vent boots, re-lap the valley' is -- and it can be checked when it is finished, which is the point.
Ask before, not after. A repair aimed at a named cause can be stood behind; a patch aimed at a stain cannot, and a contractor who is vague about the cause will be vague about this too.
Above a shop or an office the leak is reported by whoever is underneath it, which is rarely the person who owns the roof.
On a flat roof behind a parapet an ice dam behaves differently: the ice forms at the outlet rather than at an eaves line, and once the outlet is blocked the whole roof holds meltwater instead of shedding it.
A leak here has usually traveled further than anywhere else on this site.
Where there is a pitched slope at all here it is usually a small street-facing section in front of a flat roof, and the interesting part is the junction between them.
On commercial and mixed-use buildings the penetration through a flat roof is usually not a chimney but a flue, a duct or a vent, and each needs a proper curb and a flashing worked into the membrane.
Above a shop or an office an emergency has two parts, and the roof is the second one.
Pre-war chimneys, and eaves with no ice barrier.
Low ground, open water. Which way is the water going?
Post-war and often overlaid, so the eaves are buried.
Steep pitch. Specific details fail, not the field.
Rear additions and garages, and their junctions.
Built as a set, so the street is a reliable guide.
The widest age spread. Age decides where to look.
The questions that decide this job, answered up front.
More urgent than in a warm climate. Water still sitting 48 hours after rain means the fall is wrong or the outlet is blocked, and in a freezing winter that water expands inside laps and under flashings and lifts them mechanically. Then it thaws and runs in through the gap it just made.
If the substrate is sound and dry, a coating is a reasonable holding measure and we will say so. If it is not sound, a coating seals moisture in and buys about a year. We establish which you have before quoting either, and we will tell you when the cheaper option is genuinely the correct one.
Almost certainly because the repair went where the ceiling was wet rather than where the water entered. Water gets in at a junction, runs along a rafter and drops at the first low point, which on a shallow pitch can be several feet away. That is why the roof space gets inspected here before anything is quoted -- the underside of the deck shows the direction of travel.
That is an ice dam, and it is the opposite of a rain leak. Heat escaping into the roof space melts snow on the upper roof; the meltwater refreezes at the cold eaves and dams; water then backs up behind it and goes in above the line the covering sheds from. It shows up during a thaw. The lasting fix is insulation and ventilation, not shingles.
It is Florida Building Code, Existing Building, section 706.1.1: not more than 25 per cent of a roof area repaired, replaced or recovered in any twelve-month period unless the whole system is brought up to current code. It gets quoted nationally because it sounds universal. It is not New Jersey law, and it is not what decides whether your roof should be repaired.
The roof space walked as well as the roof, before any price. The cause named in writing, not just the work.