What Is a Window Without a Flange?
A flangeless window, also known as a block frame window, is designed without the exterior mounting flange that typically secures the window to the building’s frame. This type of installation is commonly used in replacement projects, retrofits, and custom builds, where the existing window frame remains intact.
Benefits of Installing a Window Without a Flange
Ideal for Replacements – No need for major structural modifications.
Sleek, Modern Look – Creates a cleaner exterior aesthetic.
Easier Installation – Often a quicker and less invasive process.
Preserves Existing Trim & Siding – Great for maintaining original architecture.
How Is a Window Without a Flange Installed?
1️⃣ The old window is removed, leaving the existing frame intact.
2️⃣ A new block frame window is inserted into the opening and secured using screws or brackets.
3️⃣ Foam insulation is added around the edges for an airtight seal.
4️⃣ Interior and exterior trim is reinstalled for a seamless finish.
When Should You Choose a Window Without a Flange?
🔹 If you're replacing windows in a brick or stucco home.
🔹 If you want a modern, minimalistic window design.
🔹 If you're installing windows in an existing frame without disrupting the structure.
💡 Considering a window install without a flange? Contact Mastercraft Windows & Conservatories for expert advice and installation!