According to a new study by market research firm The Freedonia Group, demand for windows and doors in the U.S. will grow 6.9% per year to reach $31.9 billion by 2018. And it’s not just the numbers that are growing. Window and door manufacturers are thinking big too: big frames, big panes, and big openings. Here’s a collection of large-format windows and doors whose folding panels and huge glass expanses you’ll see trending soon.

Space-Making Design
The accordion-style design of Jeld-Wen’s custom folding window makes rooms look and feel larger. The window comes in sizes as large as 24 feet, but can be combined to create a 48-foot opening. Each window is made with LoE3-366 insulating glass and can be customized in a variety of textures, patterns, and colors. Jeld-Wen. 800.535.3936.

Tall Glass of Window
The Old World Classic and Ultra Series Sterling collections now include triple-hung windows with three operable sashes. The large-format windows take advantage of a wall's vertical real estate to increase daylighting, and improve views and natural airflow. Whether contemporary or historically accurate, each triple-hung window is custom-built to suit the project. Architectural details including a chain-and-pulley system are available to meet requirements for historic homes. Kolbe Windows & Doors.

Light & Bright
A 2 15/16-inch narrow stile and rail profile maximize glass and light in the Contemporary Clad door system. Despite the window’s increased viewing surface, it meets energy code demands and offers structural integrity with 2 1/4-inch thick panels made of LVL core construction and extruded aluminum. The window is available in several colors including white and bronze. LaCantina Doors. 888.221.0141.

Roll it Open
The Ultimate Multi-Slide Door is available in large sizes, with widths up to 50 feet wide and heights up to 12 feet tall. The door features pull-and-latch hardware with wheels to minimize effort while operating. The product is also available in pocket door panels that disappear completely into the wall, as well as a stacked-panel configuration. Marvin. 888.537.7828.

Modern Marvel
VistaGrande flush-glazed fiberglass entry doors are designed to offer wider viewing areas and create a clean, modern look that lets in plenty of sunlight. Customers can choose stile and rail features to achieve an authentic wood appearance, or glass options including clear, pear texture, and chord texture. The door is also available in numerous internal grille designs. Masonite. 800.895.2723.

Come Into the Fold
Aluminum-framed windows with narrow stiles are the hallmark of the SL80/81 folding series. Panels feature a glass fiber thermal break for energy efficiency. The window is available in two profile options: The SL80 has a rounded profile, while the SL81 has a more angular profile. The folding panels come in sizes up to 10 feet tall and 3-feet-2-inches wide. Nanawall. 800.873.5673.

Parting Ways
Mira Premium Series Bi-Parting aluminum-clad wood door is a four-panel option to help blur the lines between indoor and outdoor living spaces. Eight exterior colors are available to complement the clear wood or prefinished white interior. Upgrade to the maker's HP2+ glass package for a configuration that meets Energy Star criteria in all climate zones. Ply Gem.