Do You Need a Bed Base? Mattress, Base and Frame Explained

If you've just picked a mattress and you're wondering whether the base is an upsell, it isn't. You do need a bed base for almost every mattress sold in New Zealand. Going without one usually costs you more over the life of the mattress.

This guide covers what a base actually does, how it differs from a bed frame, and what happens if you skip it.

Quick Facts

What is the difference between a mattress, a bed base and a bed frame?

The three words get used interchangeably in NZ listings, which is where most of the confusion starts.

You'll also see the word ensemble in NZ listings. It means a base and mattress sold together as one unit.

A base and a frame aren't competing options, despite how the phrase bed base vs bed frame sounds. A frame includes a base. What you're deciding is whether you want a bed head as part of it.

Do you actually need a bed base?

For a standard pocket spring mattress, yes. The base spreads your weight evenly across the underside, which is what stops the mattress from dipping in the middle over the first few years.

A mattress without even support will sag wherever that support is missing. You feel it as a dip under your hips, and once it's there, it doesn't come back out.

The other job a base does is airflow. Air needs to move underneath so moisture from your body can escape rather than sitting in the foam layers.

If you already own a slatted frame, you can put the mattress straight onto it and skip the base. Check that the slats are evenly spaced and none are cracked or bowing. A broken slat does the same damage as no support at all.

What happens if you put a mattress on the floor?

A mattress on the floor is fine for a few nights. Over a few months, it becomes a problem, because NZ homes run damp and a mattress on the floor has nowhere to breathe.

Moisture collects on the underside where you can't see it. That is how you end up with mould on a mattress that looks fine on top, and a protector won't prevent it.

It's a common shortcut when you're renting or flatting, and the bed is going into storage again in a year. Getting in and out at floor height is also hard work with sore knees or a bad back, and a base lifts you to a normal height for very little extra.

Can the wrong base affect your mattress guarantee?

It can. Most mattress guarantees cover manufacturing faults rather than damage caused by poor support. Sagging caused by an unsupportive base usually sits outside the cover.

So it's worth checking before you save money on the base and spend the difference on the mattress. A five-year guarantee is only as good as what you put underneath it.

Our bases are built from NZ pine. Guarantee terms vary depending on the set you choose, and you can read the full details on our Warranty and Returns page.

Should you buy a mattress and base together?

Buying them as a set usually costs less than buying the two separately, and it takes the guesswork out of matching them. You also get the whole bed in one delivery instead of two.

Sizing is the other advantage. A set is built to the same dimensions throughout, so you won't have a mattress overhanging the edges of the base. If you're still deciding on size, our NZ bed size guide covers the dimensions.

Our mattress and base sets run from single through to super king. We've been buying directly from New Zealand factories and global suppliers since 1978, which is how the sets stay affordable.

Which bed base suits your room?

Three things usually decide it: how much storage you need, how big the bed is, and how you’re getting it into the room.

Standard bases are the simplest and the cheapest. Drawer bases add storage underneath, which earns their place in a small bedroom or a flat with no wardrobe space. Split bases come apart into two halves, which matters for a king or super king going up a narrow stairwell.

Have a look through our bed base range to see what's in stock in your size.

Still not sure what your mattress needs?

If you've already got a mattress and you're not certain what will support it properly, give us a call. We can tell you what fits before you spend anything.

Call us on 09 444 9356 or email sales@bedwarehouse.net.nz.