Three different exterior window and door colours with glass panels.

August Savings: Get 10% OFF All Windows and Doors

PLUS No Payments for 3 Months OAC!

Now is the perfect time to invest in high-quality windows, patio doors, and entry doors—all while enjoying outstanding savings.

From August 1 to August 31, 2025, enjoy 10% off all windows, patio and entry doors.

Five gold stars above the words "Reviews on Google" indicating five-star rating.

Schedule Your FREE in-home Consultation Today!

Map of Simcoe County, Muskoka and surrounding areas. The map is in grayscale with a logo of a window or balcony structure at the bottom right corner, and the words 'Northern Performance Windows & Doors' in red.

View Our Service Areas

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Our Windows and Doors are known for their exceptional quality, energy efficiency, and aesthetic appeal.

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We work with you to determine which products would work best for your home and install year-round.

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Our team of skilled professionals ensures a seamless installation process, guaranteeing your satisfaction and the perfect fit for your windows and doors.

Seize the Savings this August – Take 10% Off All Windows and Doors!

Check out some of our recent projects

Front view of a brick house with large bay windows and a landscaped garden in front.
Front door of a brick house with a concrete porch, a black mailbox, and a house number plaque. Snow is on the ground and steps.
Stone wall building exterior with a gray window and wooden door, surrounded by green ferns and plants.
Stone wall with a large window reflections of trees and a white fence outside.
Yellow front door of a brick house with house number 175, two black wall-mounted lanterns, a decorative wreath on the brick wall, a wooden bench with a white towel, and a pile of snow in front.
Three large window panes with black frames on a stone exterior wall, a gray Adirondack chair, a blue towel, and a red Tim Hortons coffee cup on a gray wooden deck.
Green front door with three rectangular glass panels and side glass panels, set into a brick house, with a concrete step at the entrance.
Black front door with glass panels, gold handle, and black frame, flanked by two black lantern-style outdoor lights on a white exterior wall.
A stone house with a gray metal roof, three large black-framed windows, and a green lawn in front.

See what customers have to say about our work!

Quote from Georgina W praising John and his team for installing windows and patio doors with professionalism and courtesy, and recommending Northern Performance for future projects against a black background with faint window illustrations.
Quote by Rick L: 'Their products are of excellent quality and their employees are an absolute pleasure to deal with.' The background features window illustrations.
Quote by Patricia A: "John at Northern Performance was terrific to deal with. Went above and beyond to ensure our satisfaction."

Don’t miss out on this limited-time offer! Let us turn your home improvement dreams into reality.