Impact Windows in El Cid Without Losing the Historic Look
West Palm Beach historic bungalows can get full hurricane protection without losing the divided-light look. Here is how the SDL detail makes both possible.
If you own one of the 1920s or 1930s craftsman bungalows in El Cid or Flamingo Park, you have probably been told at some point that you cannot install modern impact windows without losing the historic look. The original wood-frame, divided-light windows are part of what makes those bungalows look the way they do. Replacing them with flat modern double-pane glass would change the architectural character of the house and probably trigger the historic preservation board to push back.
The good news: that is not the only option. The simulated divided-light (SDL) detail on modern impact windows recreates the historic look in a code-compliant, hurricane-protected assembly. We have done a number of these. Here is how it works.
What the original divided-light windows look like
A traditional 1920s craftsman or Spanish bungalow window has multiple small panes of glass divided by thin wooden muntins. Often a 6-over-6 pattern (six small panes in the upper sash, six in the lower). Sometimes 4-over-4 or 8-over-8 depending on the architectural style. Each pane is a separate piece of glass, separated by real wooden bars.
The look is distinctive. From the street, the windows have visual texture and rhythm. The shadow lines between the muntins are part of what gives historic bungalows their character.
The problem with replacing them in modern impact glass
A standard modern impact window is one large sheet of laminated glass in a frame. The visual effect from the street is a single flat plane of glass with no muntins or divisions. Replacing the original 6-over-6 divided-light window with a single-pane impact window changes the architectural character noticeably. Historic preservation boards usually push back.
What simulated divided-light does
The SDL detail adds external grid bars to the outside of the laminated impact glass, and internal grid spacers between the two layers of glass that make up the laminated assembly. From the street, the window looks like a divided-light window with the same visual rhythm as the original. From inside, the grids are visible across the glass surface.
The structural assembly underneath is still a single laminated impact pane, which is what gives the window the hurricane protection. The grids are visual only. They do not affect the impact rating.
The result is a window that passes most historic preservation reviews and provides full impact protection simultaneously.
The grid pattern decision
We match the original grid pattern (6-over-6, 4-over-4, prairie, or whatever the historic spec uses) for the cleanest preservation approval. Custom grid patterns are available if your specific home had a non-standard original configuration.
The grids are usually white or off-white to match traditional muntin colors. Bronze and black grids are available for homes where the original was dark wood. We bring physical samples to the measure visit so you can see the look against your house.
The historic preservation review
For homes in designated historic districts (El Cid, Flamingo Park, the older Northwood corridor), impact-window replacements sometimes require additional review beyond the standard Palm Beach County permit. Replacement-in-kind (same style, same divided-light pattern, similar visual proportion) usually moves through historic review without major friction.
We handle the historic district paperwork as part of the project scope. The review typically adds a few weeks to the front of the timeline but does not affect the install itself.
The PGT and CGI line choices
For most West Palm Beach historic bungalow projects we install PGT WinGuard with the SDL detail. The grid options cover the traditional patterns. The frame profile is configurable to approximate the original wood-frame proportions.
CGI Estate is the upgrade for homes wanting heavier extrusions. The frame depth is more substantial, which approximates the look of traditional wood frames more closely than the standard line. ES Windows is the import option for custom shapes or specific architectural projects.
The arched and custom-shape consideration
A lot of 1920s and 1930s West Palm Beach bungalows feature distinctive arched window tops, half-rounds, or casement windows with operating side-hinges. We measure precisely, account for manufacturing tolerance on each custom shape, and order with extra lead time.
Expect 10 to 14 weeks of manufacturing lead time on the custom shapes. The historic review can extend that timeline by a couple of weeks.
The salt-air thing for east-side El Cid
For homes east of US-1 and within a mile of the Intracoastal, salt exposure is meaningful. We recommend marine-grade hardware on hinges, latches, and operating mechanisms. The standard finishes corrode faster on the east side. The marine-grade option costs modestly more and extends practical service life by decades.
The energy and comfort improvements
A 1920s bungalow with original wood-frame single-pane windows is leaking conditioned air constantly. The frame conducts heat, the glass has no thermal performance, the seals around the sash are compressed beyond useful. Modern impact glass with Low-E coating and argon fill cuts the solar heat gain meaningfully and stops the air infiltration.
Most West Palm Beach homeowners with historic bungalows see noticeable drops in summer cooling cost after the impact-window install. The exact number depends on the home and the usage, but the savings is real.
The financing piece
We work with Service Finance, Renew Financial, GoodLeap, and Ygrene. Qualified West Palm Beach homeowners can split the project across monthly payments. Some programs offer zero down or no payments for the first 12 to 18 months.
For historic homes where the impact-window project runs higher than a typical install (because of custom shapes and the SDL detail), the financing option often makes the math work without the cash impact upfront.
The honest recommendation
If you own a historic bungalow in El Cid, Flamingo Park, or Northwood and you have been told you cannot have modern hurricane protection without losing the original look, that is not accurate. The SDL detail makes both possible. The historic preservation review approves it in most cases.
We are happy to walk the house, measure every opening, and write a quote that itemizes the standard versus custom configurations. The historic district paperwork is part of our scope.