We have been installing both engineered and solid timber across Sydney for over 30 years. This guide is written from the perspective of installers who deal with these products on real job sites every week, not from a product brochure. By the end you will know which one suits your home, your subfloor, and your lifestyle.

Quick Comparison: Engineered vs Solid Timber at a Glance

Those are the headline differences. The decision usually comes down to your subfloor and how long you want the floor to last.

What Is Engineered Timber?

Engineered timber is made by bonding a real hardwood top layer (called the wear layer or lamella) to a plywood or HDF core. The top layer is typically 2mm to 6mm of real timber, often European oak or Australian hardwood, with the visual character of a solid plank.

The clever part is the construction underneath. The plywood layers are cross-bonded, which means each layer’s grain runs perpendicular to the next. This cancels out the natural movement that timber wants to make when humidity changes. The result is a real timber floor that stays flat and stable in conditions where solid timber would expand, contract, or cup.

Engineered timber is the dominant choice in Sydney for two practical reasons. First, most newer homes and almost all apartments are built on concrete slabs, and engineered timber can be installed directly over concrete using glue or a floating method. Second, Sydney’s humidity, particularly in coastal suburbs, plays havoc with solid timber but barely affects engineered.

What Is Solid Timber?

Solid timber flooring is a single piece of hardwood, typically 19mm to 22mm thick, milled from species like spotted gum, blackbutt, tallowwood, or jarrah. The whole plank is the wear layer. Drop a heavy object on it, and you damage the surface. Sand it down 30 years from now, and you can keep going for many more decades.

Solid timber is the traditional Australian flooring choice and the one most people picture when they think of “real timber floors.” It has unmatched longevity. Some of the solid timber floors we have refinished in older Sydney homes are 60, 70, even 100 years old, and they still have decades of life left in them.

The trade-offs are practical. Solid timber needs to be nailed to a timber subfloor. If you have a concrete slab (which is most modern Sydney homes and every apartment), you need to install a plywood subfloor first, which adds significant cost and raises your floor height by 18mm or more. Solid timber also moves more with humidity changes, so installation must account for seasonal expansion and contraction.

Stability and Performance in Sydney Conditions

Sydney’s humidity averages between 55% and 70% year round, with summer peaks higher than that in coastal areas and lower numbers in winter heated homes. Timber responds to humidity by absorbing and releasing moisture, which causes movement.

Solid timber can expand and contract by 1% to 2% across the grain with seasonal humidity changes. In a 4m wide room, that is up to 80mm of movement spread across the floor. Properly installed solid timber accommodates this with expansion gaps and acclimatisation, but in homes without climate control (most Sydney homes) you may notice small gaps appearing between boards in dry winter conditions and tighter joints in humid summers.

Engineered timber moves far less, typically 0.1% to 0.3%, because the cross-bonded plywood core resists movement in all directions. This makes it the better choice for:

• Apartments with concrete slabs
• Homes with ducted air conditioning that runs heavily
• Coastal suburbs (Bondi, Cronulla, Manly) with high humidity
• Homes with underfloor heating
• Any project where wider planks (180mm+) are desired (wide solid planks move significantly more)

This is one of the most common reasons we recommend engineered timber to Sydney clients, even when budget would allow solid. The performance gap in Australian conditions is real.

Subfloor Compatibility

This is the single biggest practical difference between the two products, and the one most homeowners do not fully understand until we explain it during a measure and quote.

If your home is on a concrete slab and you want solid timber, you are looking at adding a plywood subfloor (an additional $40 to $60 per square metre) plus the height implications for doorways, skirtings, and transitions to other rooms. For most slab-on-ground homes in Sydney, the additional cost and complexity makes engineered the more sensible choice.

Refinishing: The Longevity Conversation

Both products can be sanded and refinished, but they have very different lifespans.

Solid timber can be refinished 5 to 10 times over its life. A typical refinish removes 1mm to 2mm of timber, and a 19mm solid plank with a usable thickness of around 14mm above the tongue can withstand many refinishes. This is why solid timber floors in heritage Sydney homes can be 80+ years old and still going.

Engineered timber can be refinished depending on the thickness of the wear layer:

• 2mm wear layer: usually 1 refinish
• 3mm wear layer: 1 to 2 refinishes
• 4mm to 6mm wear layer: 2 to 3 refinishes
• 6mm+ premium engineered: 3 to 4 refinishes

A quality engineered floor with a 4mm to 6mm wear layer will still outlast most homeowners’ time in a property. If you are planning to live in the home for 20 to 30 years, the practical lifespan difference between premium engineered and solid timber is not as significant as it sounds on paper. If you are buying a forever home and want to pass it down, solid timber is the longer-term play.

Cost Comparison

Pricing varies significantly based on species, finish, format, and site conditions. As an indicative guide for supply and installation in Sydney:

Add $40 to $60 per square metre for plywood subfloor installation over concrete slabs when choosing solid timber.

The only way to get an accurate price is through an on-site measure and quote. Every home is different, and the cost is driven as much by site conditions as it is by product choice.

Apartment Owners: A Special Note

If you live in a strata apartment in Sydney, your choices are effectively narrowed before you start.

Solid timber is rarely a viable option in apartments because:

• You almost certainly have a concrete slab (requiring a plywood subfloor, which most body corporates will not approve due to floor height changes)
• Solid timber over plywood over concrete creates a louder floor that often fails IIC acoustic ratings required by strata schemes
• Many body corporates restrict installation methods that involve nailing or significant subfloor changes

Why Visiting a Showroom Matters

Photos do not do justice to the difference between engineered and solid timber when it comes to colour, grain, texture, and feel. The natural variation across boards is also impossible to judge from a small online sample.

At our Miranda showroom in the Sutherland Shire we have full-sized boards in both engineered and solid timber across every species and finish we carry. Our Kensington and Concord showrooms also display the full range. You can walk on the floors, compare them side by side, hold them against paint and cabinetry colours, and see how each species looks in natural and artificial light.

We do not push one product over the other. Our job is to help you make the right call for your home. Sometimes that is engineered, sometimes that is solid, and sometimes a project ends up using both.

Which One Is Right for You?

The honest answer for most Sydney homes is engineered timber. Not because it is “better,” but because Sydney’s housing stock (slab-on-ground homes, apartments, coastal humidity) is better suited to it. Solid timber is the right choice in specific situations, and we will always tell you when it is.

Frequently Asked Questions

Call us on 1300 357 662 to get started.