A stone window sill suits conditions at the window: it has no coating to peel in the sun and does not swell from condensation running off the glass. Granite, marble and quartzite differ in look and sensitivity, but each can replace a worn-out sill for years when properly installed.
Replacing windows in a house in Hamilton, Trenton or Levittown rarely stops at the frames. Once the old window comes out, the state of the sill becomes obvious: wood darkened along the glass, peeling laminate, cracks in old terrazzo. For many homeowners, that is the moment they decide what should go there instead.
A sill works in tough conditions. On the south side, the sun heats it for much of the day; in winter, water from fogged-up glass collects on it; and in many homes it holds potted plants, picture frames and holiday decorations. That is why many people consider stone when they remodel.
Why is a window replacement the right time for a new sill?
Because the sill and the window form one unit, and the wall is easiest to reach while the window is out. Replacing the sill after new windows are in means chipping into the opening again and risking damage to fresh trim.
One project is also a chance to make every sill in the house match. In older homes, each room often has a different one: wood in the bedroom, tile in the kitchen, plastic in the bathroom. Stone from a single lot gives the rooms a consistent look that pairs well with a stone kitchen countertop or fireplace surround.
How does stone hold up in full sun?
Natural stone has no varnish or film that can crack, dull or flake off. Sunlight that wears down the finish of a wooden sill over time leaves no such marks on granite or quartzite.
Each material still has its own character. Granite is tough and handles spots where things are set down and moved around. Marble brightens a room by reflecting light coming through the window, but, being a carbonate stone, it is more sensitive to acids, including some cleaning products. Quartzite pairs durability with a striking natural pattern. For engineered materials made with resins, ask the manufacturer of the specific slab how it performs under long sun exposure.
Dark stone in a south-facing window gets warmer than light stone. That does not harm the material, but it matters if the sill doubles as a shelf for heat-sensitive plants.
What about moisture and condensation on windows?
Stone does not swell or warp from water, so drops running off the glass do not damage it the way they damage particleboard or MDF. Moisture in the room, however, is a signal worth taking seriously.
In its brief guide to mold, moisture and your home, the U.S. Environmental Protection Agency notes that condensation on windows is a sign of high indoor humidity.
In practice, that means wiping the sill on cold mornings when water gathers on the glass, and ventilating the kitchen and bathroom well. Stone makes this easy, since a cloth picks up the water and the surface does not soak it in like unsealed wood. In New York City apartments with a radiator under the window, the sill also should not cover the radiator completely, because warm air rising along the glass helps limit fogging.
Older house? Check the paint on the windows first
In homes built before 1978, old windows and sills may be coated with lead-based paint. Taking them out disturbs painted surfaces, so the work falls under federal rules.
Under the EPA Lead Renovation, Repair and Painting Program, firms paid to do work that disturbs paint in pre-1978 homes must be certified in lead-safe work practices. Trenton, Hamilton and Bucks County have plenty of older houses, so ask the window crew about this before anything is removed.
More articles about stone in the home
A sill is often the first step toward bigger changes inside. On poland.us we also write about:
- granite, quartz and marble kitchen countertops
- stone fireplace surrounds
- stone in the bar area and dining room
A family stone business in Ewing
Euro 1 Countertops Granite & Marble, Inc. is a family-owned business in Ewing, New Jersey, with 20 years of experience working with granite and marble. Its services include custom window sills in granite, marble and quartzite, along with countertops, staircases and fireplaces. The company serves residential and commercial customers in New Jersey, Pennsylvania, Delaware, New York and Connecticut.
Consultations and estimates are free, with service in English, Polish, Russian and Ukrainian. Sample sill materials are shown on the company’s window sills page.
Learn more in Euro 1 Countertops Granite & Marble, Inc.’s listing in the PolishPages directory. To schedule an estimate, call 609-608-5750; the office is at 310 Dryden Avenue in Ewing, New Jersey.
This article provides general information only. Questions about lead-based paint and window replacement requirements for a specific building should go to a certified contractor or the appropriate agency.
