Monmouth County, New Jersey
Chimney Masonry and Water Repellent Questions in Rumson, NJ
Rumson's housing is almost entirely detached and owner-occupied, with a median home value above $1.6 million. Brick worth protecting is also brick worth diagnosing before anything is applied to it.
Rumson, in Monmouth County, is almost entirely detached, owner-occupied housing: the Census finds about 97% detached houses and 93% owner-occupied, with a median home value of about $1.7 million. About 28% of homes were built before 1950, and the median build year is 1969.
With homes at that value, masonry problems are worth catching early, because water damage compounds. The most common request behind a water repellent is a chimney that stains, flakes or leaks. In most cases the right first step is finding where the water is getting in.
What we look at
Where water gets into a chimney
Crown
A cracked or poorly formed crown sends water straight down into the masonry instead of off the edge.
Mortar joints
Joints that have eroded let water into the brick wall, where it can freeze and push the face off the brick.
Flashing
The metal at the roof junction directs water away. Failed flashing shows up inside the house, not on the chimney.
The brick itself
Soft or porous brick absorbs water. That is the situation a breathable repellent is meant for, once other entry points are fixed.
Learn
Water repellents and sealers are not the same thing
A water repellent is a penetrating product that lets the masonry shed liquid water while still letting vapor out. A film-forming sealer sits on the surface and can trap moisture behind it, which is how a coating meant to protect brick ends up causing it to spall.
A repellent does not close cracks, replace failed mortar or repair a crown. Applied over an open water path, it can hide the problem for a season and let the damage continue. Our guide to chimney water repellent sets out when one makes sense, and why water comes into a chimney shows how to trace the source.
Fix the entry points first. Consider a repellent only for brick that is sound and simply absorbs water.
Masonry
Freeze, thaw and why brick flakes
Water absorbed into brick expands when it freezes. Repeated cycles can flake the face off the brick, a condition called spalling. It is most common on the upper chimney, which gets the most exposure. If you see flaking, see spalling and freeze-thaw damage and consider whether repointing or replacing bricks is the better route.
Symptoms
What staining and flaking can mean
| Symptom | Possible cause | Next step |
|---|---|---|
| White powder on the brick | Salts carried by water, called efflorescence | Find and stop the water source |
| Flaking or peeling brick faces | Freeze-thaw damage after water absorption | Assess, then repoint or replace |
| Dark streaks below the crown | Water running from the top | Crown inspection |
| Mortar that crumbles when touched | Eroded joints | Repointing |
Housing profile
What the housing mix means in Rumson
Housing is almost entirely detached and owner-occupied, with about a quarter of homes built before 1950. Brick that has weathered for decades near the shore is worth diagnosing before anything is applied to it.
Questions
Frequently asked questions
Should I seal my chimney?
Only after the water source is found. A breathable water repellent may help sound brick that absorbs water. A sealer applied over open joints or a cracked crown does not stop leaks.
Will a repellent stop white staining?
It may reduce water entering, but the cause of the staining still has to be addressed. See our guide to white stains on chimney brick.
Have you worked in Rumson?
Our published projects show what we have done.
Service areas
Other areas we serve
Chimney Academy
Guides that go with this page
Questions about your chimney in Rumson?
Call us, or send a scheduling request. We will contact you to confirm. Your appointment is not confirmed until we do.