For a new roof
Include every layer that will remain on the structure: shingles, membranes, coatings and other distributed components.
Free technical tool
Roof weight calculator
Estimate the load from shingles, membranes and accessories, or calculate how much debris you will transport during a roof tear-off.
Instant results · no sign-up
IKO Marathon · Cambridge · Dynasty
Use the area of each roof plane, not only the building footprint.
Layers and materials
Start with an IKO product or enter the weight of any shingle, membrane or debris.
Material 1
Use this as a preliminary estimate
Actual weights vary with manufacturing, moisture, hidden layers and jobsite conditions. A structural engineer should verify roof capacity, and the hauler should confirm legal vehicle limits.
Using the result
Two decisions, one material breakdown
Installed load supports a conversation with the structural designer. Tear-off weight helps you choose a container or vehicle with enough payload capacity.
For a tear-off
Count each existing layer and add an allowance for moisture and debris. The trip count always rounds up.
As a practical example, this calculator can also estimate the weight of roofing materials removed when tearing down a shed. For the complete demolition sequence, see BigRentz’s guide to tearing down a shed.
Calculator formula
Weight = area × weight per area × layers × coverage percentage. For tear-off, the allowance is applied to the total.
Built-in values
IKO asphalt shingle weight per square meter
The built-in weights are values published by TurboRoof. The linked documents contain official product specifications, but do not publish these exact weights. Check your batch data sheet and edit the value when needed.
| Product | Published weight | Official IKO documentation | TurboRoof |
|---|---|---|---|
| IKO Marathon | 13.2 kg/m² | View official IKO documentation | View product |
| IKO Cambridge | 14.8 kg/m² | View official IKO documentation | View product |
| IKO Dynasty | 15.5 kg/m² | View official IKO documentation | View product |
Frequently asked questions about roof weight
Is the building footprint the same as the roof area?
Not necessarily. A sloped roof has more surface area than its horizontal projection. Measure every roof plane or use the actual area shown in the drawings.
Should I include membranes and accessories?
Yes. Add every distributed layer when estimating total load. You can enter the specific weight of membranes, coatings, insulation or debris in lb/ft² or kg/m².
Does this calculator determine whether my structure is safe?
No. It estimates weight but does not evaluate spans, framing, supports, wind, rain or existing structural condition. A structural professional must perform that review.
How do I size a truck for roof debris?
Select roof tear-off, enter every layer and the vehicle payload. The calculator estimates minimum trips; also verify available volume and applicable legal limits.