Wooden bench cushions and covers: what actually matters

Ask people with a bench how often they use it, then ask the same question of people with a bench and a good cushion. The difference is large, and it is not about looks.

Hard wooden slats are fine for a minute or two. After twenty they are the reason nobody sits outside. A cushion turns a bench you look at into a bench you use, which makes it the highest-value accessory you can buy for one.

Foam: the part that decides everything

Cushion comfort is foam quality, not fabric pattern. Fabric is what you see; foam is what you feel in month six.

• Outdoor-rated foam only. Indoor foam absorbs water, dries slowly and grows mould. Outdoor foam is open-cell or quick-dry and lets water pass through.
• Thickness: 2 to 3 inches (5 to 7.5 cm). Under 2 inches and the slats come through. Over 3 inches and you sink, which feels wrong on a bench with a back.
• Density matters more than thickness for longevity. Cheap, low-density foam flattens within a season. This is the single biggest difference between a $30 and a$90 cushion.

Fabric: what the labels mean

Two terms do all the work here.

Solution-dyed means the colour was added to the fibre before it was spun, not printed or coated afterwards. This is why some cushions hold their colour for years and others fade to a ghost of themselves in one summer. If a listing does not say solution-dyed acrylic or solution-dyed polyester, assume it fades.

Water-resistant vs waterproof. Water-resistant fabric sheds a shower; it is not sealed. A waterproof cushion cannot breathe and will trap condensation underneath, which causes the mould problem you were trying to avoid.

For most climates you want water-resistant, breathable, and a cushion that is easy to bring indoors.

Fit: the detail that makes a bench cushion look good

A cushion that slides around is worse than no cushion, and the fix is ties plus the right shape.

• Measure the actual seat, inside the frame. Bench cushions are usually sold in standard widths
  • 4 ft, 5 ft, 6 ft - so match the bench length and check the depth.
• Ties at the back, tied to the slats or the frame, not to the backrest. Two ties minimum, four is better.
• Non-slip backing helps on smooth slats but is not a substitute for ties.
• Contoured or straight is a matter of taste; contoured cushions with a centre seam fit a two-person bench better and stop people sliding to the middle.

Covers: the accessory that saves the bench

A bench cover does two jobs, and only one of them is rain.

The good job is keeping UV off the wood and the cushion. UV is what greys wood and fades fabric, and it works on covered porches just as effectively as in the open.

The dangerous job is the one a bad cover does: trapping moisture. An airtight plastic tarp over a wooden bench creates a damp microclimate that is worse than weather. Mildew on wood and cushions follows.

So the rules for covers:

1. Breathable fabric, designed for furniture. Not a tarp.
2. It must not touch the ground, or it wicks water up into the legs.
3. Air it out. Take it off on dry days. A cover that never comes off causes the problem it was meant to prevent.
4. Ties or a drawstring at the bottom so wind does not turn it into a sail.

The care routine for cushions

Cushions fail from being stored damp, not from being rained on once.

• Bring them in or into a storage box overnight if you can. Morning dew is what quietly ruins them.
• If they do get soaked, stand them on edge to dry, not flat. Air needs to move through the foam.
• Zip-off covers are worth paying for. Wash cold, air dry, never tumble dry - heat shrinks the coating and then it no longer beads water.
• Before winter storage, make sure they are bone dry, then store them somewhere with airflow. A sealed plastic bag with a slightly damp cushion inside is how you get a mouldy one in spring.

A note on wooden storage benches

If space is tight, a wooden storage bench solves both problems at once: seat on top, dry store below. Cedar interiors are particularly good for this because the wood's natural oils help keep stored textiles fresh. Check the lid mechanism, though - hinges and gas struts are the usual failure point. See the best picks page for what to look for.

Bottom line

• Spend on foam density before fabric pattern.
• Insist on solution-dyed fabric if the cushion will see sun.
• Choose water-resistant and breathable over waterproof.
• Ties plus the right dimensions beat any amount of non-slip backing.
• Cover the bench with breathable fabric, and air it out.

And once the seating is comfortable, keep the wood underneath it healthy with the seasonal care routine.