The 10-Point Mattress Integrity Audit
Is your mattress dead, or just tired? There is a real difference, and you do not need a specialist to tell them apart. Give it twenty minutes with this ten-point inspection and you will know exactly what has gone wrong, whether a topper will fix it, and whether you are about to spend money you do not need to spend.
No tools beyond your hands, a ruler and a torch. Nothing to buy to find out.
Takes 20 to 40 minutes · No tools required · Free to use and print
What this audit is for
Most people replace a mattress because it feels wrong, with no idea which part has failed. That is an expensive way to decide. This audit gives you a structure instead: cover, seams, moisture, the foam or latex core, hygiene, and how well the base underneath still does its job.
Care homes and hospitals have run mattress integrity checks for decades, because a failed cover or a saturated core is a safety issue, not a comfort one. The principle travels well. A short, ordered inspection tells you far more than another night of tossing and turning.
What a proper look will tell you
- Which part has actually gone: the cover, the seams, the core, or the bed base.
- Whether a topper, a repair or a full replacement is the sensible call, and in what order.
- Where hygiene is slipping, so damp, odour and mould get caught early rather than lived with.
- What to say if you are making a warranty claim, because you will have notes and photos.
If any of the language on your mattress label is doing the heavy lifting, our mattress jargon buster translates it into something measurable.
Work in daylight if you can, and strip the bed right back. You cannot audit what you cannot see.
The ten points
Work through them in order. Each one takes a minute or two, and the later points only make sense once the earlier ones are done.
Cover integrity
Check the outer cover for tears, punctures, worn fabric or discolouration that suggests moisture has been getting in.
- Inspect every side and corner for rips and loose threads.
- Look for staining or damp patches that never seem to dry out.
- Feel for rough spots and snags that catch on skin or bedding.
Tip: a failed cover lets moisture reach the core, and from that point the breakdown speeds up.
Seams and stitching
Work along every visible seam looking for splits, loose thread and fabric that has ballooned out under compression.
- Run a finger down each seam edge, feeling for gaps.
- Check the corners and the long sides, where separation usually starts.
- Note any soft, unstable stretch of seam that could let fluid through.
Tip: weak seams are the usual entry point for moisture and dust. Caught early, they are often repairable.
Signs of fluid getting in
Look for liquid ingress, damp and lingering smells that point to moisture behind the cover or inside the core.
- Lift the edge and press a dry cloth against suspect areas.
- Look for water-stain halos on the fabric and around the zip.
- Trust your nose. Musty or sour smells mean moisture, and moisture means mould risk.
Tip: a mattress protector is a five pound problem solved before it becomes a five hundred pound one.
Core condition
Assess the foam or latex under the top layer. You are looking for sag, softening and indentations that go beyond fair wear.
- Lie down in your normal sleeping position and note any dip that stays put.
- Sweep a flat hand across the surface, feeling for uneven firmness or soft swellings.
- Compare one side of the bed with the other. A clear difference is the answer.
Tip: deep, lasting dents mean the comfort layer or the core has given up. Our ILD and density guide explains why cheap foam gets there in five years and high-density latex does not.
Cleanliness and odour
Judge how clean the surface actually is, and whether smells survive a proper airing.
- Look for sticky residue, dust build-up and spreading stains.
- Note any odour that does not lift after a few hours with the windows open.
- Check the edges and piping, where allergens collect first.
Tip: a neutral-smelling surface genuinely helps you sleep. Our guide to cleaning a mattress the right way walks through it without wrecking the fabric.
Indentation versus firmness
Separate two different problems: a mattress that has slumped, and a mattress whose firmness has quietly changed.
- Lay a straight edge, a ruler or a broom handle, across the surface to reveal dips.
- Find the soft spots where you sink further than the area around them.
- Check your spine line while lying in your usual position. Is it straight, or hammocked?
Tip: uneven support is what turns into morning backache. If the core is sound but the surface is unkind, a topper for back pain is the cheaper route.
How it behaves under load
Test the surface with your actual body weight, moving the way you move at night.
- Roll from side to side and listen for creaking, crinkling or friction.
- Sit on the edge of the bed. Does it collapse away under you?
- Watch whether soft spots spring back, or stay flattened for minutes afterwards.
Tip: slow recovery is the clearest sign of a tired core. Latex springs back instantly, which is why it keeps supporting you for years longer.
Base and frame
Before you blame the mattress, check what it is sitting on. A sagging base reads exactly like a sagging bed.
- Check for wobble, tilt or uneven height across the frame.
- Make sure the mattress sits flat on the slats, with none bowed or missing.
- Confirm any adjustable or air components still work as intended.
Tip: a broken slat has sold a lot of unnecessary mattresses. Worth reading if you are stacking layers: foam topper on a foam mattress.
Hygiene and mould risk
Look specifically for the signs that hygiene has slipped rather than comfort: growth, trapped damp and staining patterns that do not match normal wear.
- Check inside the seams and under the edges for dark, patchy areas.
- Note damp that refuses to dry even after a full day of airing.
- If you suspect mould, stop using the mattress and get it looked at properly.
Tip: night sweats make this worse, and the material is usually the cause. See why you wake up hot.
Your verdict, and what to do next
Pull it together into one honest answer: still fit for purpose, fixable, or finished.
- Tired: core sound, surface unkind. A latex topper resets the feel for a fraction of a new bed.
- Base at fault: fix the frame first. The mattress may be fine.
- Dead: core collapsed, or hygiene beyond saving. Replace it, and buy for durability this time.
Before you spend, run the numbers through our 20-year mattress value calculator. Cheap foam replaced four times costs more than one honest mattress.
Print the checklist and take it to the bedroom
Tick each point as you go. Your progress is saved in this browser, so you can stop halfway and pick it up tomorrow. The print button gives you a clean one-page sheet with tick boxes and space for notes, with none of the website around it.
The 10-Point Mattress Integrity Audit
Photograph anything you find before you move the mattress. If you are making a warranty claim, dated photos and written notes are worth far more than a description over the phone. Stuck on what you are looking at? Send us a photo and we will give you a straight answer, whether or not you buy anything.
Tired, not dead? That is the cheap fix
If your audit says the core is sound but the surface has given up, you do not need a new mattress. You need a breathable layer with real density on top of it. Our GOLS-certified organic latex toppers are built to outlast the bed underneath.
30-night trial · Free UK delivery · 8,000+ happy sleepers
Questions about the audit
What is the 10-Point Mattress Integrity Audit?
It is a free, structured inspection you run yourself: ten checks covering the cover, seams, moisture, core condition, hygiene and the bed base. At the end you have a clear verdict on whether your mattress is still doing its job, and a sensible next step rather than a guess.
Do I need any special tools?
No. Your eyes and hands do most of it. A straight edge such as a ruler or a broom handle helps you spot dips, and a torch is useful in the dark corners. That is the lot.
How long does it take?
Twenty to forty minutes for a thorough pass, depending on the size of the bed. You can split it over two sittings. The checklist on this page remembers which points you have ticked, so nothing is lost if you stop.
Does it work for every type of mattress?
The checks are general integrity indicators, so they apply to foam, latex, pocket-sprung and hybrid beds alike. If yours has integrated mechanical or air components, follow the manufacturer's guidance for those parts as well.
What should I do if I find problems?
Write it down and photograph it first. Then match the finding to the fix: a sound core with an unkind surface is a topper job, a failing base is a frame job, and a collapsed core or a mould problem means replacement. Our page on what a mattress topper actually does covers where a topper does and does not help.
Can a topper fix a sagging mattress?
Only if the sag is shallow. A topper follows the shape underneath it, so a five centimetre dip will still be a five centimetre dip with a topper on top. Where the mattress is structurally fine but too firm, too soft or too hot, a natural latex topper is the most cost-effective reset there is. See also can you put a topper on a memory foam mattress.
Is this a substitute for a professional inspection?
No, and it is not meant to be. It is an at-home guide for spotting the obvious. For structural failure, visible mould growth or anything you think might be a health risk, get a professional to look at it, and stop sleeping on it in the meantime.
How does this relate to what Not Swiss Cheese sells?
We sell natural latex, and we would rather you bought one honest layer than four cheap ones. This audit exists because most people replace a whole mattress when one part has failed. If the answer turns out to be a topper from us, good. If the answer is tighten your slats, that is a good answer too.
Why we published this instead of an advert
We built this audit because the bedding industry is very good at selling replacements and very bad at explaining failures. A mattress that dips after three years is not a mystery, it is low-density foam doing exactly what low-density foam does. Knowing that saves you money, and it usually saves you a landfill trip too.
Not Swiss Cheese sells GOLS-certified organic natural latex, and nothing else. No cooling gels, no mystery comfort layers, no medical-sounding words that mean nothing. Just material you can measure, with the numbers published. You can read more about why we started, or see the range in our latex pillows and latex mattress toppers.
Keep reading
Finished the audit? These go deeper on the fixes, and on buying something that lasts longer than the last one.