Ice Dam Repair in Midtown from $150. If the ceiling stains during a thaw rather than during rain, this is almost certainly what you have. Free inspection and a written quote.
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. Clearing and enlarging the drainage is more use here than anything done to the membrane.
An ice dam is a heat problem wearing a roofing costume. Warm air escaping into the roof space melts the snow lying on the upper roof. That meltwater runs down to the eaves, which are cold because nothing heated sits under them, and refreezes there. Repeat for a week and you have a ridge of ice holding water behind it.



The roofing element prices like any other repair, $350 to $1,800. But be clear about what you are buying: an ice dam is caused by heat escaping into the roof space, and the repair that ends it is air sealing, insulation and ventilation. That is not roofing, we do not pretend it is, and no published New Jersey figure for it exists to quote you honestly. 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.
The roof side: an ice barrier membrane at the eaves where the covering is coming off anyway, the damaged courses, and the flashing or valley the water has been getting past.
Insulation and air sealing work in the roof space, which is the part that actually stops the melting. We will tell you what needs doing and that it is somebody else's trade rather than inventing a number.
One winter, usually. That is a legitimate thing to buy if you are selling or if money is tight this year, and it should be sold as what it is rather than as a fix.
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.
A leak here has usually traveled further than anywhere else on this site.
The whole roof is flat on much of this stock, and it sits behind a parapet with internal drainage.
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.
We can clear it, and sometimes that is the right emergency step. But it will be back within the week, because the cause is heat escaping into the roof space and nothing about clearing ice changes that. Steam removal and chipping both risk the covering, and chipping frequently does real damage.
They can keep a channel open and stop water pooling behind a dam, which is a legitimate holding measure on a roof that cannot be improved this year. They do not stop the melting, they cost money to run every winter, and anybody selling them as the solution is selling a symptom.
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.