Masonry Sealing in New Lenox, IL — First, Find Out Whether Your Brick Needs It

Masonry Sealing in New Lenox, IL

Masonry sealing in New Lenox, IL is worth doing on some walls, pointless on others, and genuinely harmful on a few — and there is a two-minute test that tells you which one you have. Emerald Masonry LLC assesses, repairs and seals masonry throughout New Lenox and Will County. Family-owned, licensed, bonded and insured, 40+ years of Chicagoland experience, free on-site estimates. Call (708) 288-1696.

Most sealing sold door-to-door skips that test entirely, which is how homeowners end up paying to coat a wall that was already shedding water — or worse, to seal a wall that needed repointing.

The Test: Does Your Brick Actually Absorb?

Spray a small, representative area of wall with plain water and watch what happens.

• Water beads, or sits and runs off → the masonry is still shedding. A repellent adds little right now.
• The brick darkens slowly over 10–30 seconds → moderate absorption. A repellent is reasonable on exposed elevations once the wall is sound.
• The brick darkens almost immediately and drinks it in → high absorption. This wall is a genuine candidate — but first find out why it is that thirsty.

That last point matters. High absorption usually means the fired face of the brick has been compromised — most often by past pressure washing or sandblasting, which strips the hard outer surface permanently and cannot be reversed. A repellent helps such a wall, but it is treating an injury rather than maintaining a healthy wall.

Test more than one spot. South and west elevations take the driving rain here and are frequently in a different condition than the sheltered sides.

The Rule That Decides Whether Sealing Helps

Repair first. Seal second. Never the reverse.

A penetrating repellent is designed for one job: shedding wind-driven rain off sound masonry. It cannot bridge an open mortar joint, a cracked brick, a failed sill, a corroding lintel, or a gap at a window. Water entering through any of those goes past a sealer as though it were not there — and a sealed face slows how fast the wall can dry back out afterward.

So the honest sequence on a New Lenox house is:

1. Diagnose the water path — where is it genuinely getting in?
2. Repair it — tuckpointing, brick repair, sills, lintels, sealant joints, flashing
3. Let new mortar cure
4. Then apply a breathable repellent to sound wall

Whether sealing should follow a repointing job at all is covered in waterproofing after tuckpointing.

Breathable vs. Film-Forming

| | Penetrating repellent (silane/siloxane) | Film-forming coating | |---|---|---| | Where it sits | Soaks into the pores | On the surface as a film | | Liquid water | Repelled | Blocked | | Vapor | Wall still dries | Moisture trapped inside | | Appearance | No gloss, no colour change | Glossy, darkens brick, can cloud | | How it fails | Wears gradually, reapplied | Peels, blisters, spalls the brick face |

Brick walls are not meant to be airtight; they are meant to shed water and dry out. Anything preventing that is working against the wall, and in Will County's freeze-thaw cycling trapped moisture is precisely what pops brick faces off. The full comparison is in breathable vs. film-forming brick sealers.

New Lenox: Two Kinds of Wall

The subdivision stock. Most of New Lenox is 1990s-through-2010s brick and stone veneer on open Will County lots. A veneer wall is a drainage assembly — brick, an air cavity, flashing at the base and over openings, and weep holes to let water back out. It is designed to get wet and drain. Sealing the face does not change that design, and it is never a substitute for clear weep holes and intact flashing. On exposed west elevations with no windbreak, though, a breathable repellent meaningfully reduces how much water the wall takes on during driving rain.

The older village core. The blocks around the original town along the Lincoln Highway corridor carry older, softer brick that needs a lighter hand — soft mortar when repointed, gentle cleaning, and a repellent chosen for a more absorbent substrate.

Both sit in the same climate: dozens of freeze-thaw cycles a winter, and the wettest masonry on any building taking the worst of it.

Our Process

1. Walk the whole envelope — joints, brick faces, sills, lintels, chimney, sealant, weeps, grade, gutters and downspouts.
2. Test absorption on multiple elevations.
3. Repair the entry points and let the mortar cure.
4. Clean appropriately — the gentlest method that works, never blasting or high pressure.
5. Test-apply a trial area to confirm absorption rate, coverage and that appearance does not change.
6. Apply properly — low-pressure flood coat at the correct rate with proper overlap, masking windows, trim and plantings. Under-application is the most common failure; the material has to saturate, not mist.

What Drives the Cost

Square footage to be treated · height and access, from a ranch elevation to a two-story or a chimney needing staging · masonry porosity, since thirsty brick absorbs considerably more material · repairs required first, usually the largest part on an older house · substrate mix where stone trim is involved · surface preparation and cleaning · season. The on-site assessment is free and written.

Emerald Masonry LLC is a family-owned, licensed and insured masonry contractor serving Chicago and the Chicagoland suburbs with 40+ years of experience in tuckpointing, chimney repair, brick repair and replacement, lintel and parapet repair, foundation and limestone/sill repair, caulking, sealing, and commercial, residential, and historic masonry restoration. Free on-site estimates — call (708) 288-1696.

Serving New Lenox and Will County

We assess, repair and seal masonry throughout New Lenox's 60451 — the subdivisions north and south of Route 30, the older village blocks, and the commercial and institutional buildings along the corridors — plus the surrounding Will County towns. Sealing here usually follows tuckpointing in New Lenox, brick repair in New Lenox or masonry restoration in New Lenox. We do the same work in Frankfort, Mokena, Manhattan and Joliet.

Why New Lenox Homeowners Call Emerald

We will tell you when sealing is worth doing and when it would be a waste of your money — including the times the right answer is to extend a downspout and watch it for a season. We repair before we seal, we use breathable products that let walls dry, and we do not sell coatings that look good for one summer and cost you brick later. Family-owned, licensed, bonded and insured, 40+ years of Chicagoland experience.

Want to know whether your New Lenox brick should be sealed — and what needs fixing first? Request a free on-site estimate or call (708) 288-1696.