Question 1

How long does professional pointing last in NYC climate?

Accepted Answer

High-quality pointing performed by experienced masons lasts 25-50 years in New York's freeze-thaw climate conditions.

Question 2

What's the difference between grinding and chiseling joints?

Accepted Answer

Grinding provides cleaner, more uniform joint depth and doesn't damage brick edges like chiseling can. It's our preferred method for quality results.

Question 3

How deep should mortar joints be ground for repointing?

Accepted Answer

Joints should be ground to at least 3/4 inch depth or until sound mortar is reached, whichever is greater, for proper adhesion.

Question 4

Can repointing fix a bulging or leaning wall?

Accepted Answer

Repointing alone cannot fix structural movement issues. Bulging walls require additional structural reinforcement or rebuilding.

Question 5

Do you use power tools for grinding near historic bricks?

Accepted Answer

We use variable-speed grinders with vacuum attachments and skilled operators to prevent damage to adjacent historic bricks.

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.

Brick Grinding & Pointing