Three quotes. One says 9,200 dollars. One says 14,800. One says 17,500. Same house, same product, same square footage. Why?
This question lands in our inbox every week, usually from a homeowner in Silver Spring, Bethesda, or Rockville comparing a ranch reside. The honest answer is that the 9,200 dollar quote is real, but it’s not pricing the same job as the other two. Here’s what the cheap quote leaves out.
Cheap vinyl jobs use the thinnest J-channel the supplier carries. We’re talking 0.040 inch material, sometimes thinner. It bends if you breathe on it, fades unevenly, and warps within two summers in our humid Maryland heat.
Quality J-channel is 0.044 to 0.046 inch, often with a UV-resistant capstock. It costs maybe 30 to 40 percent more, but on a typical 1,800 square foot home that’s a difference of 200 to 350 dollars in materials. Not a budget breaker. Yet the cheap crews skip it because every line item shaved is a margin point preserved.
What you’ll notice in year three is that the corner posts on the south elevation start to look chalky and uneven, and the trim around your windows is wavy when it should be straight.
This is the single biggest cost cut in cheap siding jobs.
Vinyl siding installed flat to the existing sheathing transmits noise, dents on impact, and provides essentially zero insulation value. A proper installation in the DC suburbs uses fanfold or rigid foam board between the housewrap and the siding. The foam adds about R-2 to R-3, smooths out minor sheathing irregularities, and makes the siding feel solid when you push on it.
Fanfold runs about 0.30 to 0.45 cents per square foot installed. On an 1,800 square foot home with maybe 2,400 square feet of wall area, that’s 720 to 1,080 dollars. Cheap quotes skip it. You’ll find out it was skipped the first time a kid throws a baseball and the siding panel cracks instead of bouncing.
Walk around any house that was sided cheaply 5 years ago and look at the caulk lines around windows and J-channel terminations. They’re cracked. They’re pulling away. Some are visibly missing.
That’s painter’s caulk. It’s fine for trim work indoors. It is not fine for exterior siding penetrations in a climate that swings from 18 degrees in January to 96 degrees in July.
The right product is a urethane or hybrid polymer sealant. OSI Quad Max or Sashco Big Stretch are the two we use most often. They flex with seasonal movement, bond to almost anything, and last 15 to 20 years. They cost 9 to 14 dollars a tube versus 3 dollars for painter’s caulk. A typical reside uses 30 to 50 tubes. Real math: 300 to 700 dollars more in materials.
If you’ve ever wondered why the caulk on your neighbor’s siding is splitting after three summers, this is why.
A lot of cheap jobs reuse whatever was behind the old siding. If the existing housewrap is intact, that’s defensible. If it’s torn, missing, or 40-year-old felt paper, replacing it is mandatory in any honest scope.
Quality housewrap (Tyvek HomeWrap or VaproShield) plus proper window flashing tape adds 600 to 1,200 dollars on a typical home. Skipping it means water that gets behind the siding, which it will, has nothing stopping it from reaching the sheathing. We’ve torn off “five-year-old” siding jobs in Gaithersburg where the OSB underneath was already black with mold.
Then there’s drip cap flashing above windows and doors. Code requires it. Half the cheap jobs we audit don’t have it, or have a piece of bent aluminum flashing that’s already corroded.
A vinyl reside should start with a proper aluminum starter strip nailed level along the bottom of the wall, not the J-channel rolled upward as a starter. Cheap crews use the J-channel because it saves them buying a separate component. The result is that the bottom course of siding doesn’t lock in properly, and over time the panels can sag, pop loose in high winds, or rattle in storms.
Starter strip is about 1.50 to 2.00 dollars per linear foot. On a typical home, that’s 200 to 350 dollars. Skipping it is one of the most common shortcuts in this region.
For a 1,800 square foot rancher in Wheaton last fall, here’s how three quotes broke down. Same house, same Mastic vinyl product, same color.
The real cost gap is 5,600 to 8,300 dollars, and almost all of it is materials and details that disappear behind the siding panels. You don’t see them on day one. You see them in year four when the cheap job starts failing.
Fiber cement (James Hardie, Allura) has its own version of this problem. The cheap installer cuts every plank with a circular saw indoors, blows silica dust through the neighborhood, skips the required 1/4 inch gap at trim terminations, and uses face-nailing instead of blind-nailing. The siding will warp, crack, and void the manufacturer warranty within a few years.
A proper Hardie install uses score-and-snap or a fiber cement shears, follows the gap-and-caulk schedule from the install manual, and uses stainless or hot-dip galvanized fasteners. It costs more. It actually lasts the 30 to 50 years the marketing promises.
Three things to ask any siding contractor in the DMV.
Honest contractors will answer all three without flinching. The cheap ones get vague.
We do siding installs across Montgomery, Howard, and Frederick counties, and our quotes always break out the materials by line item so you can compare apples to apples. No mystery numbers, no skipped details.
Take a look at our siding services or contact us for a written estimate that shows exactly what you’re paying for.