To get a meaningful quote for a flat roof mounting system, there are five pieces of information you can prepare upfront. Missing any one of them could make the numbers you receive less accurate, which may lead to unnecessary back-and-forth.

1. Panel dimensions – be precise, not approximate

Different panels have different frame thicknesses, and the clamps need to match exactly. A difference of just a few millimeters can mean the clamps won’t fit properly. This determines whether the drawings are accurate and whether the components will actually work on site.

2. Panel quantity – determines how many sets you need

5 panels and 50 panels are completely different designs – material usage and unit costs change with volume. Quantity directly affects the “cost per watt” and is essential for an accurate quote.

3. Tilt angle – 10° vs 30° makes a noticeable difference in cost

A steeper angle means higher wind load on the structure, which often requires stronger posts and more bracing. Decide on the angle before asking for a quote, so the numbers you receive are actually relevant to your project.

4. Wind speed and snow load – don’t guess, check your local code

These two numbers determine whether the structure needs to be reinforced. If you don’t have them, suppliers will have to use conservative assumptions – which can lead to an over‑designed and more expensive solution, or worse, an under‑designed one. Check your local design standards first, so you get a realistic and reliable quote.

5. Site drawing or rough layout – without dimensions, the design can't be finalized

The supplier needs to know roof size, parapet height, and the location of obstructions like equipment bases or vents. Without a drawing, they can only design for an “ideal” layout – but site conditions are often different. Even a hand‑drawn sketch is much better than nothing.

Each of these five items is simple to prepare. Take 10 minutes to gather them, and you'll get a more accurate and actionable quote – without the back‑and‑forth.