Skip to main content
mud sill

mud sill

1 9.9
A wooden beam lying across the base of a wall that rests on the ground or foundation
  • noun
  • /mʌd sɪl/
  • Specialized
translation icon : viga de cimentación
  • The barn’s mud sill was replaced with treated wood to prevent future damage.

Examples

  • The carpenter checked the mud sill for rot before starting repairs on the house.

  • The carpenter installed a new mud sill for the foundation.

  • After the heavy rain, water seeped in under the mud sill.

  • A mud sill is essential for proper drainage.

  • The contractor laid a mud sill to support the wall above it, ensuring stability.

  • To prevent rot, he installed a new mud sill beneath the house.

  • During construction, the builder recognized the importance of a sturdy mud sill in the structure.

Synonyms

sill
vsmud sill
  • Specialized
16 5.3

A horizontal piece under a window or door that supports the frame

is narrower, meaning the lowest timber usually contacting ground or foundation
mudsill
vsmud sill
  • Specialized
9.2

A horizontal beam at the base of a building that supports the frame and spreads the weight

is the same meaning but written as two separate words instead of one

Surface Forms

mud sill singular
mud sills plural

Morphology

mud + sill

The noun 'mud' specifies the location/condition (ground/wet earth) and 'sill' denotes a horizontal structural member, so the compound denotes a sill at ground/mud level. Although this is a somewhat specialised constructional term in building jargon, its meaning is directly compositional and thus predictable for a learner who knows both constituents.

Etymology

Mud sill comes from a simple image: the sill, a bottom beam, lying in the mud under a house. Because that beam sits low and supports the wall, mud sill means 'the lowest beam at the base of a wall'.