Measuring a loft window, particularly a skylight, requires precision to ensure a proper fit for replacement or assessment. According to the reference provided, you will need numbers from both the outside and inside of the skylight, starting with the exterior measurements taken from the roof.
Exterior Measurement Steps (From the Roof)
The initial and "first numbers" you gather when measuring a skylight are taken from the outside on the roof where the skylight is installed. These steps are crucial for determining the overall size from the exterior perspective.
Here’s how to take these measurements based on the reference:
- Locate the Measurement Line: Find the point where the roof shingles meet the skylight flashing. This is typically the boundary you will measure along.
- Measure the Width: Measure along this line (where shingles meet flashing) across the width of the skylight. This is the first dimension to record.
- Measure the Length: Measure along the same line (where shingles meet flashing) across the length of the skylight.
- Measure the Height: Measure the height of the visible skylight frame or the height of the curb (the raised frame the skylight sits on), if applicable.
These exterior measurements provide key dimensions visible from the roof level. As the reference notes, you will also need measurements from the inside, although the specific inside steps are not detailed in the provided information.
Why Accurate Measurements Are Essential
Obtaining accurate measurements is vital when dealing with loft windows or skylights. Incorrect measurements can lead to:
- Purchasing the wrong size replacement window.
- Issues with weatherproofing and sealing.
- Complications during installation.
- Potential damage to the roof structure.
Taking the time to measure carefully, following the steps outlined for the exterior as your starting point, helps ensure you have the foundational data needed for your project.
