How to Install VELUX FCM Skylights
Installing a VELUX FCM skylight can be a rewarding project that brings natural light and a fresh look to your home. VELUX products are renowned for their quality and ease of installation, and VELUX FCM Curb Mounted Skylights are no exception. This guide will walk you through the installation process, ensuring that your skylight is installed correctly and efficiently.
This Replacement Skylights guide will lead you through each step of the installation process, from building the curb to installing the flashing and the skylight itself. Whether you’re looking to add a light source to a dark room, interested in the benefits of solar options, or simply want to enhance your home with a VELUX product, this guide will ensure that your installation is done right the first time. If you are replacing an existing skylight, remove the existing skylight and begin with the underlayment process.
The Importance of Proper Installation
Proper installation of your VELUX skylight is crucial. It ensures that the product functions as intended, maintaining its durability and effectiveness over time. Correct installation is also vital for the validity of your warranty. Following the installation instructions closely will help prevent issues such as leaks and ensure that your skylight remains a beautiful and functional addition to your home for years to come.
Step 1: Preparation and Planning for Skylight Installation
Proper preparation is key to a successful installation of your curb-mounted VELUX FCM skylight. This section outlines the tools, materials, and planning steps necessary to ensure your installation process is smooth and efficient.

Tools and Materials Needed
To install a VELUX FCM skylight, you will need specific tools and materials. Make sure you have the following:
- Measuring tape
- Carpenter’s level
- Circular saw (for any cutting or adjustment)
- Drill with bits
- Hammer
- Utility knife
- Caulking gun
- Roofing nails
- Flashing kit (specific to your VELUX skylight model)
Remember, having the right tools at hand will save time and help avoid any unnecessary interruptions during the installation process.
Installation Checklist and Requirements
Before starting the installation, it’s crucial to go through the checklist provided in the VELUX installation instructions. This checklist includes:
- Verifying skylight sizes
- Checking the condition of the roof where the skylight will be installed
- Ensuring all necessary parts and tools are available
Additionally, review the local building codes and obtain any necessary permits. This step is essential to ensure that your installation complies with local regulations and safety standards.
Measuring and Preparing the Roof Site
Measure the area on your roof where the skylight will be installed. It’s important to ensure that the location you choose allows for easy and safe installation and optimal light entry.
- Use a measuring tape to find the center point for your skylight on the roof.
- Mark the outline of the curb on the roof to ensure correct placement.
- Consider factors like sun exposure and roof structure while choosing the location.
With the right tools, a thorough understanding of the installation process, and careful planning, you are now ready to begin the actual installation of your VELUX FCM skyligh