Water Damage From a Burst Pipe or Hot Water Cylinder: What Happens Next?

Water damage inside a home can happen quickly. A hot water cylinder fails, a pipe bursts, a bath overflows or an appliance leaks — and suddenly you're dealing with damaged flooring, walls, cabinetry and adjoining rooms.

The first call is usually to an emergency restoration company to extract the water and dry the affected areas. They may lift flooring, remove underlay, open sections of wall and install commercial fans and dehumidifiers.

Then comes the next stage:

What has the water damaged, what needs to be repaired, and how much will it cost to put your home back together?

That's where the building repair and insurance reinstatement process begins.

Internal Water Damage Can Start in Many Different Ways

When homeowners hear flood damage, they often think of a major weather event. But some of the water-damage repairs we deal with can start with something much more ordinary:

• burst or leaking pipes

• failed hot water cylinders

• overflowing baths, showers or basins

• leaking dishwashers or washing machines

• plumbing failures in kitchens and bathrooms

• water escaping from an upper storey into the rooms below.

The cause matters, but when assessing the building repairs, an equally important question is:

Where did the water go?

What can water actually damage?

Water rarely respects the boundaries between rooms.

A hot water cylinder leaking in the laundry can damage flooring before travelling beneath it into the hallway.

An overflowing bath upstairs can affect the bathroom floor, mid-floor structure and the ceiling below.

A dishwasher or kitchen pipe can leak beneath cabinetry and flooring and travel into adjoining rooms before the full extent of the problem is noticed.

Depending on where the water travels, repairs can involve carpet and underlay, timber or laminate flooring, plasterboard, insulation, skirtings, cabinetry, ceilings, framing, electrical components, plumbing, waterproofing, tiling and paint finishes.

Damage can also exist behind finishes that appear relatively unaffected. MBIE notes that water damage to plasterboard can extend behind the lining to insulation, wiring, building paper, cavities and connections.

The drying company has finished. What happens next?

The drying company and builder perform different parts of the restoration process.

The restoration company's priority is generally to remove water, expose affected areas where necessary and dry the building.

Once moisture levels are acceptable, the building needs to be assessed for reinstatement.

This may mean you're left with carpet removed, sections of wall cut away, missing skirtings, exposed framing or damaged cabinetry.

The builder's job is to establish what needs repairing and how all the affected areas will be put back together.

A typical repair scope might include:

Building repairs → insulation → wall and ceiling linings → plastering → waterproofing/tiling where required → cabinetry → flooring → electrical and plumbing fit-off → painting and finishing.

For larger repairs, coordinating that sequence and the different trades involved becomes an important part of the project.

What can stay and what needs replacing?

Not everything that gets wet automatically needs to be replaced.

Some materials can be successfully dried and retained. Others may swell, deteriorate, become contaminated or lose their ability to perform their intended function.

The assessment needs to establish:

What can remain? What can be repaired? What needs replacing?

The building also needs to be sufficiently dry before reinstatement begins. For example, MBIE requires timber framing to be below 20% moisture content before replacement plasterboard is installed, with some manufacturers specifying 18% or less.

Putting the finishes back too soon risks enclosing moisture within the building.

Repairing the damage isn't always as simple as replacing what got wet

This is particularly important when preparing an insurance repair scope.

Imagine water damages one section of continuous timber flooring through a kitchen, dining and living area.

Only part of the floor may have been directly damaged, but replacing a small section may not produce an acceptable finished result.

Similar issues can arise with cabinetry, tiles, skirtings and paint finishes.

So a repair assessment needs to consider not only what was damaged, but also what is required to properly reinstate the affected area.

Getting a water-damage repair quote for insurance

Once the emergency drying is under control, your insurer may ask for a quote or scope for the building repairs.

For anything beyond a minor repair, this should consider the complete reinstatement rather than simply pricing the most obvious damaged material.

There may be:

building work + electrical + plumbing + plastering + flooring + cabinetry + tiling + painting

and those trades need to happen in the right order.

Keep photographs and records throughout the process. Photograph the original damage and anything subsequently uncovered when walls, floors or cabinetry are removed. MBIE also recommends photographing or videoing flood damage before clean-up or repairs begin.

This provides a useful record of what was damaged, what was discovered and why particular repairs were required.

What if additional damage is found?

Water damage can be difficult to assess completely until affected materials are removed.

If further damage is discovered during the repair, document it before covering or repairing the area.

Sometimes opening the building also reveals something unrelated to the water event — such as previous moisture damage or deterioration.

Where insurance is involved, it's important to distinguish between damage caused by the insured event and a pre-existing condition.

That doesn't mean an unrelated problem should be ignored. It simply needs to be treated separately from the insurance repair.

Can you renovate while the repairs are being done?

Yes, and sometimes it makes practical sense.

If your kitchen has already been partially removed, flooring needs replacing or walls are open, you might decide to complete planned improvements at the same time.

For example, you could change the kitchen layout, upgrade cabinetry, alter an adjoining room or improve insulation while areas are accessible.

The important distinction is:

Insurance reinstatement — repairs required because of the insured damage.

Homeowner improvements — additional changes or upgrades you choose to make.

Keeping those scopes and costs separate makes the process much clearer for the homeowner, builder and insurer.

Do water-damage repairs need building consent?

It depends on the work required.

Many like-for-like repairs and replacements can be exempt from building consent, provided the conditions of the Building Act exemptions are met. However, substantial structural work and certain other repairs or alterations can require consent. All building work must still comply with the Building Code.

If there's any uncertainty, consent requirements should be established when the repair scope is developed — before reconstruction begins.

What If Your Home Was Damaged by External Floodwater?

Water entering from a natural flood or severe-weather event can involve different contamination, cleaning and reinstatement considerations from an internal plumbing leak.

If stormwater, overland flow or other external floodwater has entered your home, read our guide to Flood Damage to Your Auckland Home: What the Restoration Process Really Involves.

From water damage back to home

Once the water is gone and the building is dry, there can still be a considerable amount of work between dry and finished.

Alder Homes undertakes water damage repairs, flood damage repairs, insurance reinstatement and remedial building work across Auckland.

We can assess the affected areas, establish the building repair scope and coordinate the trades required to put the home back together.

Whether the damage started with a burst pipe, leaking hot water cylinder, overflowing bath or failed appliance, the important thing is to understand where the water travelled, what it affected and what is required to properly reinstate your home.

Need help with water-damage repairs?

If the emergency drying is underway or complete and you need to understand the building repairs required, talk to Alder Homes about the next stage of your insurance or water-damage repair.