Window & Siding Replacement for Older Homes in Leonard, MI
Leonard's tree-lined streets are full of character homes—Craftsman bungalows from the 1920s, ranch houses from the 1960s, and everything in between. These homes have stories, solid bones, and usually one thing in common: windows and siding that have been patched, painted, and pushed past their useful life.
We've been doing house siding in Detroit and the surrounding Oakland County communities since 1988, and Leonard projects have taught us something important: older homes don't play by new construction rules. The rough openings aren't standard. The framing has settled. The original builders used materials and methods that modern products weren't designed for.
If you try to treat a 1950s Leonard ranch like a 2020 subdivision build, you're going to have problems—air leaks, moisture intrusion, trim that doesn't fit, windows that bind. This guide walks through what actually works when you're upgrading Detroit window experts and siding on homes that have seen decades of Michigan weather.
What Makes Leonard's Older Homes Different
Leonard sits in northern Oakland County, and the housing stock reflects the area's agricultural roots and post-war expansion. You've got farmhouses that date back to the early 1900s, modest Capes and bungalows from the 1930s and 1940s, and a wave of ranch homes from the 1950s through the 1970s.
Here's what that means for exterior work:
Original construction used real wood. Not engineered wood—actual dimensional lumber for framing, solid wood siding, wood window frames. When that wood starts to rot (and after 70+ years in Michigan, it does), you're not just replacing a panel. You're often dealing with structural repairs to studs, headers, and sills.
Homes have settled. Foundations shift. Floors slope. What was once a square, level window opening might now be out of plumb by half an inch or more. Modern replacement windows are built to tight tolerances—they don't forgive that kind of movement.
Insulation is minimal or nonexistent. Many older Leonard homes were built with no wall insulation, no vapor barriers, and attic insulation that's settled to R-11 or less. When we pull off old siding, we're often looking at bare studs and sheathing. That's an opportunity, but it also means the project scope changes.
Architectural details matter. Leonard homeowners tend to care about curb appeal and historic character. Wide corner boards, decorative brackets, multi-pane windows—these aren't just cosmetic. They're part of what makes the house feel right in the neighborhood. Any exterior services in Detroit and surrounding areas need to respect that.
Window Replacement Challenges in Historic Leonard Homes
Let's start with windows, because they're often the first thing homeowners want to upgrade—and the first place contractors run into trouble.
Non-Standard Rough Openings
Modern replacement windows come in standard sizes: 36" x 48", 30" x 60", etc. Older homes? Not so much. We've measured windows in Leonard homes that are 37.5" wide, 52.25" tall, and slightly trapezoidal because the framing has shifted over time.
You have three options:
- Custom windows: Order units built to your exact measurements. More expensive, longer lead times, but they fit correctly and perform as designed.
- Retrofit/insert windows: Fit inside the existing frame. You lose some glass area, but installation is faster and less invasive. Works well if the original frames are still solid.
- Reframe the opening: Cut back to the studs and build a new rough opening to standard dimensions. Adds cost and requires siding/trim work, but gives you the most options for window selection.
We don't push one approach over another—it depends on the condition of the existing framing, your budget, and how much glass area you're willing to sacrifice. But we do measure twice (sometimes three times) and order based on what's actually there, not what the blueprints say should be there.
Brick Mold and Exterior Trim Complications
Older windows were typically installed with exterior brick mold (a flat trim piece that wraps the perimeter) and integrated into the siding. When you pull those windows, you're left with gaps, exposed sheathing, and trim profiles that don't match anything available today.
If you're also replacing siding, this is less of an issue—we can detail the new siding to meet the new window trim cleanly. But if you're only doing windows and leaving the siding, expect custom trim work. We've fabricated plenty of one-off pieces to match original profiles, and it's worth the effort to avoid the "obviously replaced" look.
Weight Pockets and Rope-and-Pulley Systems
Many pre-1960 double-hung windows used a counterweight system—cast iron weights hidden in pockets on either side of the window, connected to the sash with ropes or chains. These pockets are voids in the wall that leak air like crazy.
When we replace these windows, we fill the weight pockets with foam insulation. It's a small thing that makes a noticeable difference in comfort and energy bills. If your contractor doesn't mention this, ask about it. It's part of doing the job right, similar to how we approach insulation services in Southeast Michigan.
Modern Energy Efficiency vs. Historic Character
Here's the tension: energy-efficient windows (low-E glass, argon fills, vinyl frames) don't always look right in a 1920s Craftsman. Homeowners want lower heating bills, but they also don't want the house to look like it's been stripped of character.
A few solutions we've used:
- Simulated divided lites (SDL): Grids that look like individual panes but sit over a single insulated glass unit. You get the traditional look with modern performance.
- Wood-clad windows: Aluminum or vinyl exterior for low maintenance, wood interior for traditional appearance. Pricier, but they bridge the gap.
- Matching muntin profiles: If the original windows had thick, chunky grids, we specify SDL grids with similar dimensions. Details matter.
For more on how modern windows perform in Michigan's climate, see our piece on energy-efficient windows in Metro Detroit.
Siding Over (or Removing) Original Materials
Siding replacement on older Leonard homes is rarely straightforward. You're not just swapping one material for another—you're dealing with layers of history, and sometimes hazards.
Dealing with Original Wood Siding
If the house still has its original wood clapboards or shingles, the first question is: what's the condition? We've seen wood siding that's 80 years old and still solid (rare, but it happens) and wood siding from the 1990s that's rotted through (poor installation, no paint maintenance).
If the wood is sound, you can side over it. This adds some insulating value (the old siding acts as an extra layer) and saves on demolition and disposal costs. We typically add a layer of rigid foam insulation or fanfold over the old siding to create a flat, consistent nailing surface and boost the R-value.
If the wood is rotted, it has to come off. No exceptions. Siding over rot just hides the problem—moisture will continue to wick into the framing, and you'll end up with bigger structural issues down the road. We've seen too many homes where a previous contractor took shortcuts, and the homeowner paid for it twice.
Asbestos Considerations in 1950s-1970s Homes
This is the big one. A lot of homes built between 1950 and 1980 have asbestos-cement siding. It was popular because it was durable, fireproof, and low-maintenance. It's also a regulated material.
Asbestos siding isn't dangerous if left undisturbed. But if you're removing it, Michigan law requires proper handling and disposal. That means:
- Testing to confirm the presence of asbestos (if there's any doubt)
- Hiring a licensed asbestos abatement contractor for removal
- Following EPA and MDHHS guidelines for containment and disposal
You can side over asbestos in many cases, which avoids the abatement cost. We've done this plenty of times—furring strips over the asbestos, then new siding on top. It's code-compliant, safe, and saves money. But if the asbestos siding is cracked, brittle, or in poor condition, removal is the better call.
We're not an abatement company, but we work with certified contractors regularly and can coordinate the process. It adds to the timeline and budget, but it's not optional. For more on dealing with deteriorated exterior materials, check out our guide on wood rot on trim and fascia in Metro Detroit.
Insulation Opportunities During Siding Replacement
Once the old siding is off, you're looking at the bones of the house. This is your chance to add insulation that wasn't there before—or upgrade what's there to modern standards.
Options include:
- Rigid foam board: 1" or 1.5" of foam adds R-5 to R-7.5, creates a thermal break, and provides a flat surface for siding installation. We use this on most jobs.
- Spray foam in wall cavities: If the sheathing is off or there are large gaps, we can spray foam into the stud bays. More expensive, but it air-seals and insulates in one step.
- Blown-in cellulose or fiberglass: Drilled through the sheathing into each stud bay. Less invasive than spray foam, still effective.
The right choice depends on the existing wall assembly and your budget. But ignoring insulation during a siding project is a missed opportunity—you're already paying for the labor to remove and replace the exterior. Adding insulation is a relatively small incremental cost with a big payoff in comfort and energy savings.
Vapor Barrier and Moisture Management
Older homes were built to breathe. No vapor barriers, no house wrap, just wood sheathing and siding. That worked okay when heating systems were less efficient and indoor humidity was lower. Modern homes are tighter, and we heat them more, which drives moisture into the wall cavities.
When we re-side an older home, we add a weather-resistant barrier (house wrap or similar product) over the sheathing. This stops wind-driven rain from getting into the wall while still allowing water vapor to escape. It's a balance—you want the wall to dry to the outside, but you don't want bulk water intrusion.
If we're adding foam insulation, we pay attention to where the dew point falls in the wall assembly. In Michigan's climate (cold winters, warm summers), you generally want the vapor barrier on the warm side (interior) and the foam on the exterior. Get this wrong, and you can trap moisture and cause rot. Get it right, and the wall assembly performs for decades.
Material Selection for Michigan's Climate
Not all siding and window products handle Michigan weather equally well. Leonard gets the full range: sub-zero cold snaps in January, 90-degree humidity in July, freeze-thaw cycles in spring, and the occasional severe thunderstorm with hail.
Vinyl vs. Fiber Cement for Freeze-Thaw Cycles
Vinyl siding expands and contracts with temperature. In Michigan, that's a lot of movement. Cheap vinyl gets brittle in the cold and can crack if you bump it with a snowblower. Quality vinyl (thicker gauge, impact-resistant formulations) holds up much better.
We install a lot of CertainTeed Monogram and Mastic vinyl. Both are engineered for northern climates, with higher impact resistance and fade warranties that actually mean something. The key is proper installation—leaving room for expansion at the ends, not over-driving nails, and using the right accessories (J-channel, corner posts) that move with the siding.
Fiber cement (James Hardie, LP SmartSide) doesn't expand and contract like vinyl. It's dimensionally stable, which is an advantage in a climate with big temperature swings. It's also more impact-resistant, won't melt if the grill gets too close, and can be painted any color.
The downsides: it's heavier (requires more labor and sometimes additional framing support), more expensive, and requires periodic repainting (every 10-15 years, depending on the finish). But for homeowners who want the look of wood without the maintenance, fiber cement is hard to beat. We're James Hardie siding installers in Metro Detroit and have installed thousands of squares over the years.
For more on how different siding materials hold up in Michigan, see our article on how long siding lasts in Michigan's climate.
Window Materials That Handle Temperature Swings
Windows face the same challenge: they need to perform in extreme cold and extreme heat, often within the same week in spring or fall.
Vinyl windows are the most common replacement option. They don't rot, don't need painting, and modern formulations handle temperature swings well. Look for welded corners (not screwed), multi-chamber frames for insulation, and quality hardware. We install a lot of Andersen, Pella, and Marvin vinyl windows—all are proven in Michigan conditions.
Fiberglass windows are even more stable. Fiberglass expands and contracts at nearly the same rate as glass, which reduces stress on the seals and extends the life of the insulated glass unit. They're more expensive than vinyl, but they last longer and can be painted if you want to change the color down the road.
Wood-clad windows (wood interior, aluminum or vinyl exterior) give you the traditional look inside with low-maintenance performance outside. They're a good fit for historic homes where appearance matters. The downside is cost—expect to pay 30-50% more than comparable vinyl windows.
Color Retention and UV Exposure
Michigan gets plenty of sun, especially in summer. Darker siding colors absorb more heat, which accelerates fading and can cause warping on south- and west-facing walls.
If you're set on a dark color (navy, charcoal, deep red), make sure the product is rated for it. Many vinyl manufacturers now offer "dark color" formulations with higher heat resistance and better UV inhibitors. Fiber cement handles dark colors better because it doesn't expand as much with heat.
We also talk to homeowners about color choices in the context of their neighborhood and home style. Leonard has a lot of traditional homes—Craftsmans, Colonials, Capes—and some colors just look more appropriate than others. For ideas, see our post on the best siding colors for Michigan homes in 2026.
Manufacturer Warranties in Older Home Applications
Here's something most contractors won't tell you: manufacturer warranties often have fine print that excludes certain applications. Installing siding over old wood? Might void the warranty. Installing windows in out-of-plumb openings? Same issue.
We read the warranty documents and install according to the manufacturer's specifications. That means if we're installing James Hardie over an existing substrate, we follow their guidelines for moisture barriers, fastening, and clearances. If we're installing CertainTeed siding, we use CertainTeed accessories and follow their installation manual.
Does it take more time? Sometimes. But it means the warranty is valid, and if there's ever a product defect, you're covered. We've been a CertainTeed certified 5-star contractor for years, which gives our customers access to extended warranties they wouldn't get otherwise.
Cost Reality for Leonard Homeowners
Let's talk money. Older homes cost more to upgrade than new construction. There's no way around it.
Why Older Homes Cost More to Upgrade
New construction is predictable. The framing is square, the openings are standard, the sheathing is flat. You can estimate materials and labor with confidence.
Older homes? Every one is different. We've started siding jobs where we found rotted band joists that needed replacing. We've started window jobs where the headers were undersized and sagging. We've found knob-and-tube wiring, abandoned chimneys, and wasp nests the size of basketballs.
None of that shows up in an initial estimate based on exterior measurements. It shows up when we start peeling back layers. And it has to be addressed—you can't side over a rotted rim joist and expect the siding to stay straight.
Good contractors build contingency into their estimates for older homes. We typically add 10-15% to the base cost to cover unknowns. If we don't need it, great—the project comes in under budget. If we do need it, we're not hitting you with surprise change orders.
Hidden Conditions and Contingency Budgets
Here are the most common hidden conditions we find on Leonard projects:
- Rotted framing: Sills, headers, studs, band joists. Water gets in, wood rots. Happens on every third or fourth older home we work on.
- Insufficient flashing: Older homes often have no flashing around windows and doors, or flashing that's rusted through. We add it as part of the job.
- Outdated electrical: Sometimes old siding jobs covered exterior outlets or light fixtures that aren't up to code. We coordinate with electricians to bring things current.
- Critter damage: Squirrels, raccoons, and bats love old soffits and fascia. If we find damage, we repair it and seal entry points. Related to our exterior trim repair guide for Metro Detroit.
If your contractor gives you a rock-bottom estimate with no mention of contingencies, be cautious. Either they're inexperienced with older homes, or they're planning to hit you with change orders once the job starts.
ROI Considerations for Historic Properties
New windows and siding won't necessarily increase your home's value dollar-for-dollar. Real estate appraisers look at comparable sales, and if the comps have old windows and siding, yours won't appraise higher just because it's been upgraded.
But here's what new exteriors do give you:
- Lower energy bills: Better insulation and air sealing can cut heating costs by 20-30% in older homes. That's real money every winter.
- Easier sales process: Homes with new exteriors sell faster and with fewer inspection issues. Buyers don't want to inherit deferred maintenance.
- Improved comfort: Less drafts, more consistent temperatures, quieter interiors. Hard to quantify, but it matters.
- Avoided emergency repairs: Replacing siding before it fails is cheaper than replacing siding and fixing water damage after it fails.
If you're planning to stay in the house for 5+ years, the investment usually makes sense. If you're selling next year, you might be better off with a fresh coat of paint and some targeted repairs.
Financing and Planning Timeline
A full window and siding replacement on a 1,500-square-foot Leonard home typically runs $20,000-$40,000, depending on materials and the extent of repairs needed. That's not pocket change for most homeowners.
Financing options include:
- Home equity loans or HELOCs: Usually the lowest interest rates if you have equity in the home.
- Manufacturer financing: Some manufacturers (James Hardie, for example) offer promotional financing through approved contractors.
- Personal loans: Faster approval, but higher interest rates.
- Contractor payment plans: We offer flexible payment schedules—deposit at contract signing, progress payments during the job, final payment at completion.
As for timeline, plan on 4-8 weeks from contract signing to project completion for a typical job. That includes ordering materials (custom windows can take 6-8 weeks), scheduling the crew, and doing the work. We don't rush—older homes require careful attention, and we'd rather take an extra week to do it right than cut corners to hit a deadline.
When to Call a Contractor Who Knows Older Homes
Not every contractor is equipped to handle older home projects. You need someone who's seen it before, knows how to adapt, and isn't going to panic when they find something unexpected.
Red Flags That Indicate Urgent Need
Here's when window and siding replacement moves from "nice to have" to "get this done now":
- Visible rot: Soft wood around windows, doors, or corners. If you can push a screwdriver into the trim, it's time.
- Water stains on interior walls: Especially around windows or near the roofline. Water is getting in somewhere, and it's doing damage.
- Drafts you can feel: Hold your hand near a window on a windy day. If you feel air moving, the seals are shot.
- Peeling paint in sheets: On wood siding, this often means moisture is trapped behind the paint. The siding is failing.
- Condensation between window panes: Means the seal has failed and the insulating gas has leaked out. The window is no longer energy-efficient.
If you're seeing any of these, don't wait. The longer you wait, the more expensive the repairs get. We've seen situations where a $15,000 siding job turned into a $30,000 job because the homeowner waited two more years and let the rot spread into the framing.
Seasonal Timing for Leonard Projects
We work year-round, but some seasons are better than others for exterior projects.
Spring (April-May): Popular time, so schedules fill up fast. Weather can be unpredictable—rain delays are common. But it's a good time to get projects done before summer.
Summer (June-August): Best weather, longest days, most predictable schedules. Also the busiest season, so book early. Heat can be a factor for crews, but it doesn't affect the work quality.
Fall (September-October): Another popular window. Cooler temperatures are easier on the crew, and homeowners want to button up before winter. Schedules are usually full by mid-August.
Winter (November-March): We do winter work, but it's more challenging. Siding can be installed in cold weather (with some material limitations), but window installation in sub-freezing temps is tough on the crew and the homeowner (open windows = heat loss). If you need emergency repairs, we'll get it done. If it can wait until spring, we'll tell you that too.
For related seasonal considerations, check out our guide on exterior house painting in Mount Clemens for spring 2026.
What to Ask Contractors During Estimates
When you're getting estimates for window and siding work on an older Leonard home, here are the questions that separate experienced contractors from the ones who are going to cause you headaches:
- "Have you worked on homes from this era before?" You want someone who's seen the construction methods and materials common to your home's age.
- "What do you do if you find rot or structural issues?" The answer should include a process for documenting, estimating the repair, and getting your approval before proceeding.
- "How do you handle non-standard window openings?" If they say "we'll make it work," that's not an answer. You want specifics about custom sizing, reframing, or retrofit options.
- "What kind of warranty do you offer on labor?" Material warranties are one thing. Labor warranties (what happens if the installation fails) are another. We offer a 5-year labor warranty on all installations.
- "Can you provide references from similar projects?" Ideally in Leonard or nearby communities, on homes of similar age and style.
Also ask to see their contractor's license (required in Michigan for any project over $600) and proof of liability insurance. If they hesitate or make excuses, walk away.
Ready to Get Started?
NEXT Exteriors has been protecting Michigan homes since 1988. We've worked on hundreds of older homes in Leonard, Lake Orion, Rochester Hills, and throughout Oakland County. We know what to expect, how to handle surprises, and how to do the job right the first time. Get a free, no-pressure estimate from a team that shows up on time and does the job right.
Get Your Free QuoteOr call us: (844) 770-6398
Other Services from NEXT Exteriors
Beyond window and siding replacement, we offer a full range of exterior services in Detroit and Southeast Michigan. That includes Detroit roofing services for homes that need new shingles or repairs, seamless gutters in Detroit, MI to manage water runoff, and Southeast Michigan painting professionals for exterior painting projects using Sherwin-Williams products exclusively. We're also Detroit's top-rated insulation contractor, offering attic, wall, and spray foam insulation to improve energy efficiency in older homes.
Frequently Asked Questions
Yes, but only if the old wood siding is in solid condition—no rot, no major warping, and firmly attached to the framing. We typically add a layer of rigid foam insulation over the old siding to create a flat surface and improve energy efficiency. If the wood is rotted or damaged, it must be removed before new siding goes on. Siding over rot just hides the problem and leads to bigger structural issues down the road.
Asbestos-cement siding was common from the 1950s through the early 1980s. It's usually recognizable by its rigid, brittle texture and the fact that it often looks like shingles or clapboards but doesn't flex like wood or vinyl. The only way to know for sure is to have a sample tested by a certified lab. If you're planning to remove siding from a home built during that era, testing is a smart first step. If asbestos is present, you'll need a licensed abatement contractor to handle removal, or you can side over it (which is often the more cost-effective option).
It depends on your budget, the home's architectural style, and your maintenance preferences. Vinyl siding is the most affordable and low-maintenance option—quality brands like CertainTeed and Mastic hold up well in Michigan's freeze-thaw cycles. Fiber cement (James Hardie, LP SmartSide) is more expensive but offers better impact resistance, dimensional stability, and a more authentic wood-like appearance. For historic homes where appearance matters, fiber cement is often the better choice. For ranch homes and more utilitarian styles, high-quality vinyl performs well and saves money.
For a typical 1,500-square-foot home, expect 4-8 weeks from contract signing to project completion. That includes ordering materials (custom windows can take 6-8 weeks), scheduling the crew, and completing the installation. The actual on-site work usually takes 5-10 days for siding and 1-2 days for windows, depending on the number of openings and the complexity of the job. Older homes often take longer because of repairs and custom fitting. We don't rush—quality work takes time, and we'd rather do it right than fast.
Yes, especially in older homes that have minimal insulation and drafty original windows. New energy-efficient windows with low-E glass and proper installation can reduce heat loss by 25-30% compared to old single-pane or failed double-pane units. New siding, especially when combined with added insulation (rigid foam or spray foam), creates a better thermal envelope and reduces air infiltration. Most homeowners see a noticeable drop in heating costs the first winter after the project. The exact savings depend on your home's size, insulation levels, and heating system, but 20-30% reductions are common.
Not necessarily, but there are advantages to doing both together. When we replace siding, we can properly flash and seal the new windows into the wall assembly, which improves water resistance and energy performance. It also saves on labor—the crew is already on-site, scaffolding is up, and we can coordinate the trim and finish details so everything looks cohesive. That said, if your budget only allows for one or the other, prioritize based on condition. If the siding is failing and causing water intrusion, do that first. If the windows are drafty and rotting but the siding is solid, start with windows. We can help you assess which is more urgent.
Fiber cement typically costs 30-50% more than quality vinyl siding for materials and installation. For a 1,500-square-foot home, vinyl siding might run $8,000-$12,000, while fiber cement would be $12,000-$18,000, depending on the product line and extent of trim work. Fiber cement is heavier, requires more labor to install, and often involves more complex trim details. But it's also more durable, more impact-resistant, and holds paint longer. If you're planning to stay in the home long-term and want the look of wood without the maintenance, fiber cement is worth the investment. For more on fiber cement costs, see our guide on James Hardie siding cost in Bloomfield Hills.