Worcester Bay Windows

Adding A Bay Window

Adding a bay window where there was never one is a different animal from swapping a unit out of an existing opening. We're cutting into a wall that's holding up part of your house, so the first thing that happens is temporary shoring and a properly sized LVL header, not a sawzall and optimism.

In a Worcester triple-decker you're usually going through plaster, lath, old balloon framing and whatever a previous owner stuffed in there in 1978. Then comes the cantilever or knee braces, a small hip roof with real flashing and ice-and-water at the wall, and insulation in the seat floor so the bay doesn't turn into a cold box come January.

Figure two to three days for most bays, plus a city permit. Skip the flashing detail and you'll find the rot in about five winters.

Kitchen Bay Window

A kitchen bay window is the one people fall in love with over the sink. Basil on the seat board, light on the counter, a view of the yard instead of the neighbor's vinyl.

Two things make it different from bay windows anywhere else in the house. Steam is the first. A pot boiling off every night parks moisture right against the glass, so I want warm-edge spacers and at least one crank-out sash you can actually open, not a sealed picture unit that fogs by Thanksgiving. The countertop is the second. If the bay lands above a cabinet run, the seat board has to sit level with the counter, or you end up with a half-inch ledge that collects crumbs until the end of time.

We frame the new header, tie the backsplash and sill together, and insulate the knee wall underneath. Two days, three if cabinets come out.

Bay Window Vinyl

Most folks here land on vinyl, and I don't argue with them. A welded vinyl frame never needs painting, and after a winter of freeze, thaw, and that gritty salt spray coming off Park Ave, that's one less chore you'll skip. What I like on a bay window vinyl build: foam-filled sashes, low-E argon glass, an insulated seat board underneath, and a properly capped head so water sheds instead of parking there.

Where vinyl bay windows go sideways is support. The unit hangs out past the wall, so it wants cables or knee braces tied back into solid framing. Skip that step and it settles a quarter inch, the sashes bind, and nobody can work out why the window that was fine in October sticks in March.

We hang Andersen bay window units and Pella bay windows too. Vinyl is usually the sensible call.

Bay Window Replacement

Most bay window replacement calls start the same way. Fog between the panes, a seat board gone soft in one corner, or a draft you can feel from the couch in January. Old bays sag because somebody hung the weight off the head jamb instead of running cable or knee braces back into solid framing. Drop a quarter inch and the sashes bind, the seals let go, and the whole thing gets worse every winter.

So we pull the unit, open up the sill and check the rim joist for rot, rebuild whatever's punky, then set the new bay level and actually support it. The little roof over the bay gets new flashing and ice and water shield, because that's where leaks start on half the triple deckers around here. An Andersen bay window or a Pella goes in the same way.

Box Bay Window

A box bay is the square one. The sides come off the wall at a true 90 degrees instead of the 30 or 45 you see on angled units, so the projection stays shallow, usually a foot to sixteen inches, and it reads clean on the flat front of a Worcester triple decker where a wider unit would look like it wandered off a different house. Andersen bay window and Pella bay windows both build them, and so does most vinyl.

The part people skip is the little roof. It needs real pitch, step flashing tied under the siding, and insulation packed into that head cavity, or you get a frozen ceiling above the glass by January and a stain by March.

Support matters too. Knee brackets or cable anchored into the header, otherwise box bay windows sag at the nose within a few winters.

Large Bay Window

Once a bay gets past about eight feet across, it stops being a window and starts being a small addition. That's the honest truth of a large bay window: the glass alone can run a few hundred pounds, and the seat board, the roof and whatever snow sits on it in February all hang off the same header. Done right, the unit gets support cables anchored back into a properly sized header, or knee braces underneath, sometimes both.

Skip that and the middle sags. You'll see it first in the operable sashes at either end, the ones that suddenly won't latch, and then in a hairline crack in the plaster above.

Big bay windows are a two or three person lift, and on those tall triple-deckers around Grafton Hill we'll stage it so the opening isn't sitting naked overnight.

Canted Bay Window

A canted bay window is the classic one: a flat center sash with two side units splayed back at 30 or 45 degrees, so the whole thing leans out over the foundation instead of squaring off. You see them all over the Victorians around Elm Park and on plenty of triple-deckers where somebody wanted more light in a dark front room.

The angle is where these go wrong. That projection has to be carried, either by knee braces underneath or cable support hung from the framing above, and if the last crew just screwed it to the sheathing and called it a day, the head board sags and the sashes stop closing square within a few winters. We also pitch and flash the little roof properly, because a flat top over a canted bay collects January ice like a bird bath.

Casement Bay Window

A casement bay is what I steer people toward when the window faces a driveway or a narrow side yard. The flanker sashes crank outward on hinges instead of sliding, so they scoop air in sideways the way a double hung never will, and the seal compresses tight when you close it. That matters in January when the wind comes down off the hill and finds every gap.

Two things go wrong. Crank hardware gets abused when somebody shoves the sash closed by hand instead of winding it back, and the gearbox strips out. And casements swing out, so a sash over a walkway will introduce itself to your forehead. We check swing direction before anything gets ordered.

Andersen bay window units and Pella bay windows both come with casement flankers, and vinyl casements hold up fine here too.

What the job involves

Pulling the old unit out is the easy part. A bay hangs off the wall, so the real work is support: knee braces underneath, or steel cable anchored up into a doubled header, because gravity is undefeated and an unsupported bay will sag and split its seams inside a couple of winters.

Then there's the little roof on top. We frame it, sheathe it, flash it into the siding properly and pitch it steep enough that February slush slides off instead of parking there until April. Under the seat board goes real insulation, since that's where cold feet and drafty corners actually come from.

Whether the unit is an Andersen bay window, one of the Pella bay windows or a vinyl assembly, the sequence is the same fussy one, and most bay window replacement jobs here take two to three days.

What it costs

A bay isn't one window. It's three or four sashes plus a head board, a seat board, insulation underneath and a little roof over the top, so the math starts there. Around Worcester a straightforward vinyl replacement runs roughly $600 to $1,050 per window installed, $850 to $1,350 for mid range glass and frames, and a bay window replacement cost lands well above that once the roof, the trim and the cable support brackets are in the picture. Bay windows cost more in a wood clad Pella or Andersen bay window than in bay window vinyl, sometimes close to double, depending on the glass package.

Call me at (508) 406-9528 and I'll measure yours and give you a real figure instead of a shrug.

The wild card is always what's behind the old trim. If the header sagged, that's carpentry before it's a bay window installation cost at all, and I'd rather tell you that standing in your living room than after the wall is open.

Why choose us for this

You already know what you want here. The old bay sags at the seat, the sashes fog by Thanksgiving, and you'd like to hire somebody once and then not think about that wall again for a long, long time. Fair enough.

So here's what we won't do.

No number that grows: What's on the estimate is what's on the invoice. If we open the wall and find rot in the header, you see it before we touch it.

No pressure to sign tonight: The quote's just as good next week. We're not selling steak knives.

No house left half open: We don't start a job in Greendale while yours is still wrapped in plastic, and the old sashes and wrappers leave with us.

We aren't the cheapest bid you'll get on a bay window replacement. Insulating the head and seat boards and setting the support cables properly takes hours, and skipping them is how bay windows sag. The estimate costs nothing and books you into nothing.

Frequently asked questions