Course

Related terms

• Deck Beam

  The horizontal member spanning between posts that carries the joists. Size depends on span and the joist load above it.

• Corner Post

  Trim at outside (and inside) wall corners that receives and finishes siding ends for a weather-tight, clean corner.

• Deck Fascia

  The trim board covering the outer rim joist for a finished edge, often matching or contrasting the decking.

• Continuous Exterior Insulation

  Rigid foam over the sheathing, under the siding, that breaks thermal bridging through studs. Increasingly code-relevant and added during…

• Deck Footing

  The concrete base below a deck post, sized and dug below the frost line to carry the post load without heaving or settling.

• Composite Decking

  Boards of wood fiber and plastic — low-maintenance, no staining, longer warranty, higher upfront cost than wood. The dominant modern deck…

• Deck Joist

  The repetitive members spanning ledger to beam that the decking fastens to. Spacing (12–16 in.) depends on decking type and direction.

• Clapboard / Lap Siding

  Horizontal boards installed overlapping to shed water — the most common siding profile across materials.