Flashing calculator: calculate sheet metal flashing in 15 seconds

How does flashing calculation work?

The calculation has 5 steps. By hand it takes 20-30 minutes, and every step is a chance to make a mistake; TunkaForm does them all at once.

• A flashing template is selected - its blank width (for example, 250 mm) and bend angles are already in the library.
• The run length is entered (for example, 12 m) and divided into equal pieces (12 m → 6 × 2 m).
• A joint (lock) overlap is added to each piece - usually 4 cm: 2.00 m → 2.04 m.
• The metal area is calculated: blank width × total length of the pieces (0.25 m × 12.24 m ≈ 3.06 m²).
• Sheet or coil usage and the final customer price are shown.

The 3 most expensive mistakes in manual calculation

Sheet metal companies mostly lose money through small mistakes - and they repeat with every order.

• Forgetting the joint overlap: pieces come out short, have to be cut again, and metal is wasted.
• Not fitting the blank width to the sheet width: a 1250 mm sheet yields 4 strips of 300 mm with 50 mm of waste, but 5 strips of 250 mm with no waste.
• Quoting with an old material price or an old dollar rate: every order closes at a loss.

22+ ready-made flashing templates

TunkaForm comes with the flashings most widely used in the Uzbek market: eaves flashing, gutter and eaves profiles, sill flashing (drip edge), ridge caps, parapet caps, apron flashing and more. On the Business plan, we add your own custom profiles and formulas.