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Historic Restoration · Glencoe, IL

Historic Masonry Restoration - 1932 French Eclectic, East Glencoe Lakefront

October 5, 2025 | East Glencoe lakefront near Hawthorn Drive

Historic masonry restoration in Glencoe, IL follows NPS Preservation Brief 2 standards, using lime-based mortar matched to pre-1940 originals and salvaged or custom-fired brick to preserve landmark commission-approved appearance on 1932 French Eclectic structures.

Before: Glencoe 1932 French Eclectic completed work by Delta Masonry Before
After: Glencoe 1932 French Eclectic completed work by Delta Masonry After
Scope Full facade historic masonry restoration on a 1932 French Eclectic estate in East Glencoe's lakefront corridor. NHL 3.5 natural hydraulic lime mortar specified based on core analysis of original mortar samples. New owners commissioned work within 90 days of purchase after a pre-closing inspection had flagged masonry as a priority repair. 290 linear feet across three elevations. Included removal of two incompatible prior patch zones, stabilization of a quoin block at the southwest corner, and restoration of the original recessed V-joint profile characteristic of French Eclectic construction in this era.
Mortar Type NHL 3.5 natural hydraulic lime
Duration 3 weeks
Building 1932 French Eclectic
Neighborhood East Glencoe lakefront
Common brick stock Mixed brick and natural stone construction
Weather exposure High
County Cook County
From our shop 14 miles

The Problem

The new owners of this 1932 French Eclectic estate in East Glencoe contacted us within 90 days of closing. Their pre-purchase inspection had noted masonry concerns across multiple elevations, and they had set aside budget for remediation before moving in. They wanted the work done properly from the outset rather than managing a condition that was already progressing.

French Eclectic estates along the East Glencoe lakefront corridor are among the more architecturally specific homes we work on in this area. The 1932 construction on this home uses a hand-molded Norman brick with a tight joint width and a V-joint profile that is closely associated with this style. The visual character of the wall depends on that joint profile reading correctly - a concave or flush repointing job on a home like this changes the appearance of the entire facade.

When we assessed the three affected elevations, the condition matched the inspection findings: average recession of 5/8 inch on the north and west faces, with localized peaks at 1 inch in the sheltered northeast corner where leaves and debris had held moisture against the wall. Two prior patch zones were visible on the north elevation - one approximately 12 linear feet, one approximately 8 linear feet - both filled with Portland-heavy mortar that was noticeably lighter in color and harder to the tap test than the surrounding original joints. The 8-foot patch had already caused micro-cracking in two adjacent brick units.

One quoin block at the southwest corner had shifted outward 3/16 inch, likely from freeze-thaw movement behind the block. The movement had not yet opened the surrounding joints to active water entry, but left unaddressed it would continue.

Our Solution

We extracted mortar cores from three protected locations: a rear addition joint, a basement window reveal, and a covered porch wall. The samples confirmed a natural hydraulic lime chemistry without Portland content. NHL 3.5 was selected as the closest available match to the original formulation.

Work began with removal of the two incompatible patch zones on the north elevation. Both patches were cut out by hand chisel to avoid vibration stress to the surrounding original mortar and adjacent brick. The micro-cracked brick units near the 8-foot patch were stabilized with NHL 3.5 grout injection before the surrounding joints were repointed.

The displaced quoin block at the southwest corner was removed, the bed and head joint surfaces cleaned, and the block reset in fresh NHL 3.5 mortar. We used a laser level to confirm plumb and alignment to the adjacent course before the mortar stiffened. The reset joint was braced for 48 hours.

For the 290 linear feet of repointing across the north, west, and east elevations, we removed recessed mortar to a minimum 3/4 inch depth using hand chisels throughout - the tight V-joint profile on this home does not allow a grinder to work without risking the brick arris. All joints packed in two lifts and tooled to a V-joint profile using a purpose-ground steel jointing tool set to the original V-angle measured from intact protected joints.

The Result

Three weeks of work brought all three affected elevations to consistent documented condition. The V-joint profile reads uniformly across the repaired areas, matching the retained south elevation joints and restoring the formal coursing appearance characteristic of this style of construction.

The quoin block at the southwest corner is reset and stable. The two prior incompatible patch zones are no longer visible.

We provided the new owners with a full mortar specification, photographic survey, and notes on the V-joint tooling so that any future contractor has the information needed to match the work correctly.

Questions About This Project

What is a V-joint profile and how does it differ from other historic joint styles?

A V-joint is tooled with a pointed jointing tool that creates a triangular recessed channel in the mortar face. It was commonly used in formal European-influenced construction styles including French Eclectic and Chateau Revival homes. The V profile sheds water from the face of the joint while creating a shadow line that emphasizes the coursing pattern - a deliberate aesthetic choice. Restoring it requires a narrow-blade jointing tool and careful pressure control to produce a consistent angle without cutting into the brick face.

The purchase inspection flagged masonry as a priority. How serious was the actual condition?

The condition was moderate - the inspection was accurate that it needed attention, but the home had not reached the point of structural water intrusion or active brick damage. Average recession was 5/8 inch with peaks at 1 inch in sheltered corners where debris had accelerated deterioration. The two prior patch zones were the most problematic elements: both used Portland-heavy mortar that was visibly harder and lighter than the surrounding original joints, and one patch had already induced micro-cracking in adjacent brick. Removing those patches and repointing correctly was the priority action.

Why did you prioritize three elevations rather than all four?

The south elevation faced away from the prevailing weather and retained original mortar in mostly sound condition - average recession under 3/8 inch with no open voids. Disturbing sound historic mortar unnecessarily is counterproductive: it removes original material that has already demonstrated durability, and it introduces new mortar interfaces that take years to weather to a natural appearance. We assessed it, documented it, and left it. That is what the condition warranted.

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