Calculators / roof envelope

Roof covering.
Physical size ≠ cover.

The calculator separates roof geometry, effective cover, physical product size and explicit cutting layout. It does not guess laps or ordered sheet lengths.

Imports geometry only. System parameters remain blank.

1. Calculation profile

Units System parameter source Geometry source

2A. Simple geometry

Roof type Roof pitch from source °Building length mBuilding width mEave overhang mGable/end overhang m

3. Roof covering

Purchase model Purchase reserve / waste %Fasteners per m² from source pcs/m²

4. Underlay / membrane

This system uses this layer

5. Battens

System uses battens

6. Counter-battens

System uses counter-battens

7. Ridge / hips

System has separate ridge / hip units

8. Flashings

Include edge flashings

9. Accessories from technical source

Ventilation components Roof access components Snow-retention system m

The result is a quantity takeoff. Laps, effective cover, cut lengths, spacings and fastening are not inferred from typical values.

Geometry

Roof area: —

—

Covering incl. reserve—

Purchase / requirement—

Format / basis—

Fasteners—

Underlay—

Battens—

Counter-battens—

Ridge + hips—

Ridge units—

Flashings—

Details