Slate Roof Replacement in Brick Church from $15. Before you replace it: slate outlives its own nails, and that is usually what has actually failed. Free inspection and a written quote.
Slate on a mixed-use building is usually confined to a street elevation, with flat roofing behind it. That is a good outcome: the visible slate can be repaired and re-hung while the flat section behind is dealt with as its own job at its own price.
Replacing an existing slate roof runs $20 to $35 per square foot -- $40,000 to $70,000 on an average house -- because the old slate has to come off and be disposed of before the new roof starts. A new slate roof is $15 to $30 per square foot. Those numbers are why this page leads with an argument rather than a sales pitch.



Replacing an existing slate roof runs $20 to $35 per square foot -- $40,000 to $70,000 on an average house -- because the old slate has to come off and be disposed of first. A new slate roof is $15 to $30. Those numbers are exactly why this page argues against the job before it prices it. Price the access and the hours, not just the roof. A route through a shop or an occupied flat, and trading hours that decide when work can happen, are both real constraints -- and the roof is usually flat behind the parapet rather than the pitch you can see.
Slate outlives almost everything fixed to it. On a pre-war roof the usual failures are corroded nails, which let slates slip, and rusted valley linings and flashings. All three are repairs, at a small fraction of a replacement.
A steep or cut-up roof, scaffold over occupied units, a slate size or color no longer quarried, and a deck that has to be renewed underneath. Slate work also cannot be rushed without breaking material, so the honest schedule is weeks.
Widespread delamination, slate soft enough to break in the hand, or a deck that has gone. We will say when that is what we found and show you the elevation it is true of, rather than asserting it.
Flat roofs behind street-facing parapets are the Brick Church job, and access is the first problem rather than the roof: a roof reached through an occupied unit or a commercial tenancy needs somebody with keys to be part of the conversation before a date is set.
One is about your building and one is about your covering, and most quotes in this city establish neither.
At one or two and detached, replacing a covering is ordinary maintenance under N.J.A.C. 5:23-2.7: no permit, no inspection. At three it is permitted construction work, and the building is also a registered multiple dwelling under N.J.S.A. 55:13A-1 et seq. on a five-year inspection cycle. Nothing about the roof explains that.
On asphalt, if the covering away from the leak still lies flat, holds its granules and is not brittle, the roof has life in it and a repair is the right job. A failed flashing or a split upstand is hundreds of dollars and is routinely produced as proof that the whole roof is finished.
Two coverings is the practical ceiling. A roof already at two is a tear-off whatever anybody quotes, and it takes two minutes to check at the rake edge. It is the fastest way to tell whether the quotes in front of you describe the same job.
Mixed-use changes the order of work.
Where the ground floor is commercial and the upper floors are flats, the building is still a multiple dwelling and the roof still has to be reached.
Here the flat roof is the whole roof, behind a street parapet, with internal drainage.
Where there is a pitched slope here it is usually a small street-facing section in front of a flat roof, and the transition between them is the interesting part.
Partial work here usually means the flat roof and not the pitch, or one section of a larger flat roof.
The three-unit line runs right through this city.
The largest houses, and where slate survives.
Genuinely mixed eras. A neighbor proves nothing.
Duplexes divided into three, and the traces that leaves.
Tight frontages, tenants, and nowhere to park a dumpster.
Same buildings, a different construction office.
Three-plus units is the default, not the exception.
The questions that come up, before you have to ask.
Much cheaper up front -- $4.50 to $8.00 a square foot against $20 to $35 to replace slate -- and frequently the wrong decision, because a repairable slate roof has decades left. It is also irreversible on a period house. We will price both honestly and say which we would do.
Often, where the size and color are still quarried. Where they are not, the best match available is sound slate salvaged from a low-visibility elevation of your own roof -- which is why slate coming off is stacked carefully rather than treated as waste.
Two to four days on site for a house, three to five for a three-family building, and one to three weeks for slate -- slate cannot be rushed without breaking material. Weather moves all of them and we will not dry-in a roof we cannot finish. Where a permit applies, the filing and closing inspection are days on top.
Across separate structures, yes, and it is often the right answer -- a garage, a rear addition and the house are three roofs of three different ages. Across one roof, usually not: mobilization and waste cost much the same twice as once, you get a visible line where new meets weathered, and the half left behind ages through another winter.
An architectural asphalt roof in New Jersey runs $9,500 to $26,000, and on a typical 2,000 square foot house most people pay $12,000 to $18,000 installed. Per square foot that is $5.50 to $8.00 for architectural and $4.50 to $6.50 for three-tab. Slate is a different market entirely: $20 to $35 per square foot to replace an existing one.
Unit count established before anything is priced. New Jersey figures, not a national calculator.