Skip to the finished picture

Illustrative image

How it works

From your idea to your finished room

Your house today

The ground floor as it is: a dining room, a kitchen, and a wall between them.

Your idea

Your sketch, or your designer's: the wall out, an extension, bifold doors.

What we check

What that wall really holds up, and where new beams can land.

  1. Floor joists run front to back
  2. The bathroom wall stands on it
  3. Where each beam end lands
  4. Next door
  5. The ground, and any trees

Our drawings

A structural plan and a section, for your builder and Building Control.

The frame

The same structure in 3D, each load followed to the ground.

Your finished room

The same beams, boxed in, in the room you asked for.

Key to the drawings
  • Existing masonry A flat tone: everything already there, cut or seen.
  • Brickwork, new Single diagonal hatch. The outer leaf, and new brickwork in elevation.
  • Blockwork, new Cross-hatch, so it can never be read as brick beside it.
  • Concrete Aggregate triangles and fine dots, scattered at random: foundations, slabs, padstones, lean-mix cavity fill, encasement.
  • Undisturbed ground Basket weave, as a band that follows the ground line and fades out.
  • Hardcore Large open zigzag, the depth of its own layer.
  • Insulation board The looped line, touching both faces, inside the board outline.
  • Timber, cut A box with a cross. Seen along its length, an outline only.
  • Steel, cut Solid, at the section's true proportion.
  • Pressed steel Lintels, hangers, straps: a line at the wide weight.
  • DPC Heavy dashed line, as Approved Document C draws it.
  • Membrane, tray Heavy solid line: DPM, cavity tray, roof membrane.
  • Load path Where the load goes, from the roof to the ground; dashed where it runs beyond the cut.
  • Load marks Arrows at the symbol weight: loads down onto a member, bearing up under a foundation.
  • Hidden, beyond or removed Out of the cut, beyond it, or taken out.
  • By others, beyond Faint: frames, coverings. Not our structure.
  • Span Half barbs, the way the joists run. Dashed where existing.
  • Cloud Confirm on site. Never a revision mark.
  • Break line The drawing stops; the building does not.

Drawings made for this site. Not to scale, not a design, and with no sizes on them on purpose. The finished room is an illustrative image.

Send us your sketch, or just the idea.

We reply within one working day. Fixed fee, confirmed in writing before we start.