Castle Window & Door Guide
Plain-English guides to window styles, glass, installation and cost, written by the people who install them across Massachusetts.
Learn every style
Labeled diagrams, how each style works, high-end vs. basic, and a delivery-day checklist.
The classic New England window. Both sashes slide up and down, and both tilt in so you can clean the outside glass from inside.
Hinged on the side and opened with a crank, a casement swings out to catch a full breeze and presses against its seals when closed.
Hinged at the top and cranked out from the bottom, an awning window can stay open in a light rain.
Hinged at the bottom and tilting in from the top, a hopper is the go-to for basements and small, low openings.
One sash glides sideways past the other. Simple, wide and easy to use.
One big fixed pane for the most light and the clearest view. Often flanked by windows that open.
Three windows set at angles to project out from the wall, for more light, a wider view and a little extra room.
Four or more windows set in a gentle curve. Softer than a bay, with a panoramic view.
Half-rounds, arches and other shapes, often set above a window or door to add light and character.
Your front door handles weather, security and first impressions. Here’s what’s inside one.
A big glass door that glides open to your deck or yard and locks tight.
An outer door that protects your entry door from weather and lets in a breeze.
Upgrades & add-ons
| Upgrade | Benefit | Main downside |
|---|---|---|
| Triple-pane glass | A third pane adds another insulating layer. It helps most in cold, exposed rooms and with outside noise. | Heavier sash, thicker glass edge and a slightly lower amount of light and solar heat coming through. The main downside is extra cost. |
| Krypton gas fill | Krypton insulates better than argon, and it works best in narrow gaps like those in many triple-pane units. | Costs more than argon. In a typical double-pane gap the gain over argon is smaller. |
| Argon gas fill | A low-cost gas that insulates better than plain air. | Very little; it’s the common baseline in energy-efficient glass. |
| Foam warm-edge spacer | A non-metal foam spacer at the glass edge cuts heat loss there and helps reduce condensation at the edge. Castle’s standard is a stainless-steel spacer; a foam warm-edge spacer is available. | Small extra cost. |
| Foam-filled frame and sash chambers | Insulating foam inside the hollow frame and sash chambers. | None for you: Castle includes it on its windows. |
| Grids between the glass | Grids sealed between the panes give a divided-light look and never need dusting. Contoured grid profiles are available. | Can’t be removed; some people prefer an open view. Extra cost. |
Triple-pane with krypton is Castle’s top package. It isn’t a must for every Massachusetts home; the main downside of most upgrades is extra cost. Details are on each style page.
Browse by topic
Pros, cons and best rooms for every style.
What drives cost and how to compare quotes.
Glass packages and ratings, explained simply.
How replacement actually works in your home.
Entry, patio sliding and storm doors.
Room-by-room picker
Pick a room for our installers’ usual recommendation.
Best fit: Double-hung, picture or bay
A picture window flanked by double-hungs, or a bay for more light and depth.
Best fit: Casement
A crank is easy to reach across a counter, and the sash opens fully for a breeze. Awning windows are a good alternative if you want to vent in light rain.
Best fit: Double-hung or casement
Easy to open and clean; check egress needs with your estimate.
Best fit: Awning
Vents in light rain; obscure glass options for privacy.
Best fit: Hopper
Tilts in from the top; ideal for small, low openings.
At a glance
| Style | Why people choose it | Best rooms |
|---|---|---|
| Double-hung | Tilt-in sashes, classic look | Bedrooms, living rooms, upper floors |
| Casement | Full ventilation, tight seal | Over sinks, hard-to-reach spots |
| Sliding | Wide openings, simple operation | Ranches, wide walls |
| Awning | Vent in light rain | Bathrooms, above other windows |
| Hopper | Tilts in from the top | Basements, small spaces |
| Picture | Maximum light, doesn’t open | Views, paired with operable units |
| Bay / Bow | Light, depth, curb appeal | Living rooms, front parlors |
We’ll measure every opening and show you real options. Free, no pressure.
Featured guides
Installation
Why most homes keep their trim, and when a frame really needs to come out.
Window styles
Every style, its pros and cons, and the rooms it suits best.
Doors
What a storm door adds, and how to pick the right one.
Start your project
A free in-home estimate turns all of this into a clear plan and a written price for your house.
Call us (508) 425-4977
Email customerservice@setrocllc.com
No cost · No pressure
Free in-home estimate
Takes 30 seconds. Someone from our team will reach out by text, email, or phone to set a time.
We never share your info. Licensed & insured, MA HIC #200323.
