📍 34 Madampe Road, Kuliyapitiya, Sri Lanka☎ 037 228 1428 | WhatsApp 076 642 4703 / 074 339 3080

Knowledge Center

Learning Center & Calculators

Real calculators for paint, concrete and roofing, plus practical buying guides. Click any card to jump to it.

3Live Calculators
6Trade Categories
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Paint Guides & Calculator

Paint coverage, waterproofing and primer guides.

Electrical Guides

Wire selection, MCB, RCCB and lighting guides.

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Plumbing Guides

PVC pipe sizing, water pressure and tank guides.

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Roofing Calculator

Calculate sheets and screws needed.

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Concrete Calculator

Estimate cement, sand and aggregate.

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Tool Guides

Ronix tools and buying guides.

🎨 Paint Guides & Coverage Calculator

Tips

  • Clean and prime the surface first — primer improves adhesion and reduces the topcoats needed.
  • Emulsion paints typically cover 100–120 sq ft per liter per coat on smooth plastered walls; rough surfaces need more.
  • Apply at least 2 coats for even, lasting color, especially over darker existing colors.
  • Use weatherproof paint on exterior walls to resist monsoon rain and UV fading.
  • Let each coat dry fully (check the can's recoat time) before applying the next.

Paint Coverage Calculator

⚡ Electrical Guides
  • Match wire gauge to load — undersized wiring overheats and is a fire risk. Ask our staff for the right cable size.
  • Use an RCCB (residual current breaker) on bathroom, kitchen and outdoor circuits for shock protection.
  • Size MCBs just above your circuit's expected load, not the wire's maximum rating.
  • Label your distribution board circuits for easy troubleshooting later.
  • Always switch off the main breaker before working on household wiring.
🚰 Plumbing Guides
  • PVC pressure pipes are rated by class — use a higher class for main supply lines under constant pressure, lower class is fine for drainage.
  • Use Teflon tape or thread seal on all threaded joints to prevent leaks.
  • Slope drainage pipes at least 1–2% so wastewater flows freely without pooling.
  • Install a gate valve near the water meter and at each major fixture, so repairs don't require cutting the whole supply.
  • Insulate exposed outdoor pipes to avoid pressure or temperature damage.
🏠 Roofing Calculator

🧱 Concrete Calculator

🔧 Tool Guides
  • Match drill/driver voltage and chuck size to the job — bigger masonry or steel jobs need higher-torque tools like RONIX impact drills.
  • Always wear eye protection when using grinders, cutters or drills.
  • Match cutting discs and drill bits to the material (masonry, wood, metal) — the wrong bit shortens tool life and gives poor results.
  • Fully charge cordless tool batteries before big jobs and store them at room temperature to extend battery life.
  • Clean and oil moving parts (chucks, gears) periodically to keep tools running smoothly.

Not sure which materials or quantities you need?

Our staff can help you plan a full stage-by-stage list, or you can start with the Build My House checklist and turn it straight into a quotation.

Open Build My House Ask on WhatsApp
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