Sprung slats vs solid slats: What’s the difference & which are better?

Bed slats are long, narrow planks made of wood or metal, mainly used with bed frames to support the mattress. They provide an even sleeping surface and offer good ventilation since air can flow freely underneath the mattress.

There are two types of bed slats: solid slats and sprung slats. Both offer several benefits and affect how your mattress feels and performs. While most bed frames don’t have a choice of slats, understanding the differences between the two types will help you decide which is better.

What are solid slats?

Solid slats are flat, sturdy wooden planks, typically made from pine, that run across the full width of the bed to support the mattress. They are often loose and can be screwed into the bed frame, while others come attached to webbing to help keep them in place and evenly spaced.

Solid slats are rigid, and as they have no flexibility or ‘give’, they provide a firmer mattress feel. While solid slats provide a stable, supportive surface, they do not provide any cushioning, leaving the mattress to do all the work. Over time, this can lead to faster mattress wear and tear.

When positioning loose slats on the frame, it is important to space them evenly and ensure the gaps between them do not exceed the manufacturer’s recommendations. Otherwise, the mattress may sag through the gaps between the slats.

You may also need to screw the slats to the frame to keep them in place and prevent them from moving.

What are sprung slats?

Sprung slats are curved planks made from laminated woods like beech or birch. They are thinner and smaller than solid slats. The slats are inserted into plastic slat holders, which are attached to the bed frame, keeping them in place. They are arranged in two sections and connected to a centre support rail that runs down the middle of the bed.

Sprung slats are slightly arched and have more flexibility and ‘give’ than solid slats. They work with the mattress and absorb some of the impact from the sleeper’s weight, which can help extend the mattress’s life.

Sprung slats provide a slightly softer, more cushioned feel. Some slatted bed frames may include adjustable sliders located in the lumbar area, allowing you to alter the firmness or tension of the slats.

Sprung slats have a smoother finish than solid slats. This smoother surface helps prevent damage to the mattress from splinters or rough edges. However, avoid placing the mattress directly on the slats to minimise the risk. Place a breathable blanket or mattress pad over the slats to protect the mattress.

Support

Sprung slats work with the mattress and are typically more supportive than solid slats. They are more responsive and provide a softer, bouncier feel. In contrast, solid slats are firmer and provide a more consistent sleeping surface.

However, when a softer mattress is paired with sprung slats, it can sometimes feel like you are rolling out of bed, especially if the mattress has weak edges. If you are buying a new mattress, test it on both sprung and solid slats, if possible, to help you decide which feels more comfortable and suitable.

Slat quality can vary regardless of which type you choose, so always check the weight capacity with the retailer or manufacturer to ensure the slats can support the weight of the mattress and the person using it. For example, a cheaper bed frame may not support the weight of a high-quality mattress. Furthermore, heavier individuals weighing more than 16 stone may require heavy-duty solid slats that are thicker and sturdier for support.

Sometimes, bed slats can move, become loose, fall out of place, or even break, which can cause the mattress to sag. Regularly checking that the slats are secure, aligned, and in good condition will help protect your mattress and ensure the bed base provides adequate support.

Solid slats are generally easier to replace if they get damaged, as they are flat and can be cut to size to fit inside the bed frame. Sprung slats, on the other hand, can be more challenging to replace, as they are curved and need to be a specific size to fit into the slat holders.

Partner disturbance

While partner disturbances during sleep are usually caused by the type of mattress you use, your bed base can also have an impact. Since sprung slats are bouncier than solid slats, they can sometimes transfer movement across the bed. As a result, if you share a bed with someone, you might feel them move more during the night on sprung slats than solid ones.

If you prefer sprung slats, choosing a good quality pocket spring, memory foam, or latex mattress that absorbs movement can help minimise partner disturbance.

Slat spacing

Mattress manufacturers often recommend that bed slats be no more than 7.5 cm (3 inches) apart. This helps ensure even support and prevents the mattress from sagging between the gaps.

When choosing a slatted bed base, ensure the gaps between the slats do not exceed the manufacturer’s recommendations. Gaps that are too wide can damage the mattress and may void its warranty.

You can also place a sheet of plywood over the slats to create a more even sleeping surface and prevent the mattress from sagging. Drill several holes in the board to allow for ventilation.

Which are better, sprung slats or solid slats?

There is no clear answer to which type of slats is better, as it depends on the quality of the slats and the type of mattress you are using. Some mattresses may feel more comfortable on sprung slats, while others may perform better on solid slats. For example, a memory foam mattress might feel too soft on sprung slats but just right on solid slats. In contrast, traditional sprung mattresses often perform well on sprung bases.

Adjustable beds often have sprung slats because they are more flexible and responsive. In contrast, solid slats are rigid and not designed to bend or flex. They may also move or become loose when the bed is raised or lowered, potentially creating wider gaps between the slats.

Final thoughts

Most people choose a bed that complements their bedroom décor. However, mattress support is just as important as style. When choosing between sprung or solid slats, consider which type works best with your mattress and sleeping preferences.