DPC & Lintel Calculator

Estimate damp-proof course and a practical lintel size allowance for walls and openings.

DPC and lintel estimate for a 3m wall with a 1.5m opening

For a wall length of 3 metres with a 1.5 metre opening, this estimate includes damp proof course and lintel allowance using the default bearing below.

  • DPC required3.30 lm
  • 30m DPC rolls1
  • Recommended lintel length1.80 m
  • Padstones2

Results - DPC & Lintel Calculator

  • DPC required3.30 lm
  • 30m DPC rolls1
  • Recommended lintel length1.80 m
  • Padstones2

How this DPC and lintel calculator works

It estimates DPC requirement across the wall length and adds standard end bearings to recommend a practical lintel length for the opening.

Disclaimer

Material quantities shown are estimates for guidance only. Although typical UK wastage and compaction allowances have been included, actual requirements may vary depending on site conditions, installation methods, and material differences. Please confirm quantities with your installer or supplier before ordering. We accept no liability for inaccuracies, financial loss, or delays arising from the use of these estimates.