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Roof work sequence

Roof work is a water-control system, not only a finish. The correct sequence protects slope, membrane continuity, flashings, drains and overflow before leaks become interior damage.

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Urutan ini terhubung dengan kalkulator, checklist dan halaman biaya kesalahan agar planning dan kontrol risiko tetap satu sistem.

Buka halaman tahap Buka checklist Lihat biaya kesalahan Buka kalkulator

Urutan pekerjaan yang direkomendasikan

01

Prepare roof base and falls

Give water a reliable path before waterproofing starts.

  • Clean the roof base and remove laitance, dust and loose material.
  • Set out falls to primary drains, scuppers and overflow points.
  • Confirm upstands, parapet heights and equipment plinths.

Hold point: Waterproofing should not begin until falls, low points and drain locations are visible and checked.

Alat, peralatan dan akses: Laser level, Straightedge, Screed tools, Drain templates

02

Install membrane, flashings and terminations

Create continuous waterproofing around edges, penetrations and vertical faces.

  • Prime the base and install membrane or liquid system to supplier requirements.
  • Reinforce corners, outlets, penetrations, parapets and movement joints.
  • Protect membrane before other trades return to the roof.

Hold point: No covering layer or equipment installation should proceed until membrane continuity and flashings are inspected.

Alat, peralatan dan akses: Primer roller, Membrane tools, Detail brushes, Heat gun or torch

03

Test drainage, overflow and protection

Prove the roof can remove water before interior finishes are exposed.

  • Check drain strainers, overflow routes and downpipe continuity.
  • Run ponding or controlled water test where appropriate.
  • Install protection layer and record hidden details.

Hold point: Interior ceiling closure should wait until roof drainage and waterproofing evidence are complete.

Alat, peralatan dan akses: Water hose, Drain camera if needed, Moisture meter, Photo log

Alat, peralatan dan akses

Level and slope control

  • Laser level
  • Straightedge
  • Drain templates
  • Screed tools

Waterproofing

  • Primer rollers
  • Detail brushes
  • Membrane tools
  • Protection board knife

Testing

  • Water hose
  • Stopper
  • Moisture meter
  • Inspection camera

Norma konsumsi material untuk perencanaan

Rentang konsumsi adalah benchmark perencanaan. Kuantitas final harus dicek terhadap gambar, spesifikasi, kode lokal dan data supplier.

Material atau resource Basis Rentang rencana Unit Catatan
Falls buildup Roof area 0.03-0.08 m3/m2 Planning range before detailed slope drawing.
Roof membrane waste and laps Waterproofed area 10-20 % Higher for corners and penetrations.
Primer Roof substrate 0.15-0.30 kg/m2 Supplier data sheet governs final quantity.
Protection layer Roof membrane area 1.05-1.15 m2/m2 Allows cuts and edge detailing.

Quality gate sebelum lanjut

Istilah glossary terkait

Movement joint

Detail sambungan yang memungkinkan pergerakan terkontrol antar elemen.