Quality Control for Hidden Works: Electrical, Waterproofing, Pipes

Quality control for hidden works: why it matters 🛠️

Hidden works are installations that get covered by finishes — wiring, pipework and waterproofing membranes. Mistakes here are costly to fix, so early checks are essential. This guide offers practical steps, questions to ask contractors and a simple checklist you can use when accepting work.

Prepare before works are covered ✅

• Ask for project drawings and material specifications.
• Agree written acceptance stages and take photos at each milestone.
• Schedule intermediate inspections for key points before they are concealed.

Electrical work: what to inspect ⚡

• Diagrams and labelling: circuits should match the project drawings and be clearly marked.
• Connections and terminals: inspect junctions before sealing — look for neat terminations and proper insulation.
• Cable routing and protection: wiring in chases or conduits must be fixed securely and routed to avoid damage.
• Functional tests: ask to see how protective devices (breakers, RCDs) operate. If in doubt, involve a qualified electrical inspector.

Tip: take photos of junction boxes and main panels prior to plastering — they serve as proof if problems appear later.

Waterproofing: inspection focus 🛡️

• Surface preparation: membranes and coatings adhere best to clean, dry substrates.
• Material choice and application method: understand why a liquid membrane or sheet membrane was chosen for each area.
• Details at joints and penetrations: corners, drains and pipe penetrations are the most vulnerable spots — ensure careful treatment.
• Leak testing: before covering, request a water test or temporary filling of the wet area to check integrity.

Ask: "How will you ensure the junction between the shower base and the floor slab is watertight?"

Plumbing and pipes: key checks 🚰

• Material and suitability: confirm pipe types are appropriate for intended pressure and temperatures.
• Fittings and joints: only approved fittings should be used — avoid improvised solutions.
• Fixings and supports: pipes must be clamped to prevent vibration and noise after commissioning.
• Pressure tests: before concealment, request a pressure/leak test and documented results.

Practical step: insist on photographs and a signed document showing the system held pressure during the test.

Documentation and acceptance items 📋

• Scheme of installed systems and marking.
• Certificates and manufacturer data for materials.
• Photos of key assemblies before closing.
• Intermediate acceptance reports and final sign-off.
• Deadlines for rectifying defects and contractor responsibility clauses.

When to bring an independent inspector

If the property is an important purchase or you lack technical confidence, hire an independent inspector. They provide an unbiased report and often spot issues a busy contractor misses.

Friendly, practical advice

We know construction can feel stressful. Ask simple clear questions, document everything, and don’t feel pressured to accept concealed works without evidence of proper testing.

Quick acceptance checklist

• Are drawings and labels available?
• Were photos taken before closing works?
• Were electrical and plumbing tests performed and recorded?
• Are warranties and acceptance reports completed?

If you need help organising inspections or checking documents, BuyHome can assist. Browse available properties and building searches: https://buyhome.ge/en/search and https://buyhome.ge/en/apartments

Contact us for support with selecting property and supervising handover — we’ll help ensure the hidden works are done right.