Question 1

What is a lintel and why does it fail?

Accepted Answer

A lintel is the steel beam supporting masonry above a window or door. It fails when water causes rust, making the steel expand and 'jack' the bricks above it.

Question 2

How do I know if my lintels need replacement?

Accepted Answer

Look for cracks in the bricks above window corners, or visible rust and flaking metal on the underside of the beam.

Question 3

Do I need a permit for lintel replacement?

Accepted Answer

Yes, because it is structural work, NYC DOB typically requires a permit. We handle the filing and engineering coordination for you.

Question 4

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 5

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 6

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 7

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 8

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.

Question 9

Do you pull NYC DOB permits for facade repairs and scaffolding?

Accepted Answer

Yes, all exterior masonry restoration, structural brick rebuilding, and sidewalk shed or pipe scaffolding installations are fully permitted through NYC DOB NOW.

Question 10

How do you protect pedestrians during exterior masonry work?

Accepted Answer

We install heavy-duty, code-compliant sidewalk sheds with overhead lighting, debris nets, and catch platforms strictly adhering to NYC Building Code Chapter 33 safety guidelines.

Lintel Replacement