Question 1

Do masonry rebuilds require NYC DOB permits?

Accepted Answer

Yes, all major structural masonry rebuilds require approved DOB permits, which we handle completely for you.

Question 2

How long does a complete masonry rebuild take?

Accepted Answer

Timelines vary from 2-3 weeks for small sections to 6-12 months for full facade replacement with scaffolding setup.

Question 3

Can you match historic architectural details?

Accepted Answer

Yes, we specialize in historical replication including molded brick, terra cotta detailing, carved stone, and period cornices.

Question 4

Is a building safe during masonry reconstruction?

Accepted Answer

Absolutely. We use engineered shoring, sidewalk sheds, and protective netting to ensure safety during complete rebuilds.

Question 5

What causes sudden masonry collapse?

Accepted Answer

Common causes include water infiltration/freeze-thaw deterioration, foundation settlement, vehicle impact, or deferred maintenance over many decades.

Question 6

How often should brick facades be repointed (tuckpointed) in NYC?

Accepted Answer

High-exposure NYC exterior facades typically require repointing every 25 to 30 years, while exposed rooftop parapets, chimneys, and windward elevations may require service every 15 to 20 years.

Question 7

What is NYC Local Law 11 (FISP) and does my building require it?

Accepted Answer

Local Law 11 mandates that all NYC buildings taller than six stories must have their exterior walls and appurtenances inspected by a Qualified Exterior Wall Inspector (QEWI) every five years.

Question 8

Why is historic lime mortar important instead of modern Portland cement?

Accepted Answer

Historic bricks are soft and porous. Using excessively hard Portland cement creates thermal stress that crushes brick faces (spalling). We custom-mix high-calcium lime Type N mortar matching the historic elasticity.

Question 9

What causes parapet walls to lean or bow outward on NYC brownstones?

Accepted Answer

Thermal expansion and freeze-thaw cycles cause the roof-facing masonry to expand faster than the cold street side, creating cumulative eccentric pressure that tilts the wall toward the street.

Question 10

What causes window lintels to crack the surrounding brickwork?

Accepted Answer

When steel lintels over windows rust without protection, rust jacking expands their volume by up to ten times, lifting masonry above into diagonal stair-step cracks. We replace rusted lintels with galvanized or stainless steel units.

Reconstruction & Rebuilds