· Todd Martin · Baby Safety  · 17 min read

How To Lower Crib Mattress

Ensure baby's safety. Learn how to lower crib mattress easily with our step-by-step guide. Discover when to adjust crib mattress height and essential safety tips.

Keeping Baby Safe: How to Lower Your Crib Mattress

As a parent, your baby’s safety is always the top priority. One important part of creating a safe sleep space is knowing how to lower crib mattress. This task becomes necessary as your baby grows and reaches new milestones. Adjusting the mattress height prevents falls and keeps your little one secure inside the crib.

This guide will walk you through why and when to lower the crib mattress. We will also cover the tools you need and provide a clear, step-by-step process for different crib types. Following these instructions helps you maintain a safe environment for your growing child. Get ready to make your baby’s crib a safer place.

Takeaway:

  • Lower the crib mattress when your baby shows signs of sitting up, pulling to a stand, or climbing.
  • Always follow your specific crib’s instructions for adjusting the mattress height.
  • Ensure all hardware is secure after reassembly to prevent accidents.

How to lower a crib mattress? Lowering a crib mattress involves removing the mattress and its support, detaching the support from its current high setting, and reattaching it to a lower set of holes on the crib frame. This simple adjustment ensures your growing baby stays safely contained within the crib. Always check your crib’s manual for precise steps.

Why Lowering the Crib Mattress Is Essential for Safety

Lowering the crib mattress is a critical safety measure for your growing baby. It directly prevents your child from climbing out of the crib. As babies develop, they learn new skills like sitting up, pushing themselves onto their hands and knees, and eventually pulling themselves to a stand. Each of these milestones increases the risk of them getting out of the crib.

A high mattress setting means the crib rails are too low for a standing baby. If your baby can pull themselves up, they might be able to tumble over the side. This can lead to serious injuries. Keeping the mattress at an appropriate height ensures the top of the side rail is well above your baby’s chest level when they stand. Prioritizing this adjustment helps prevent falls and gives you peace of mind.

This adjustment is not just a suggestion; it is a vital safety standard. Many infant deaths and injuries happen from falls from cribs. These accidents often occur when a baby outgrows a mattress setting. By lowering the mattress promptly, you create a deeper, safer sleep enclosure. This change makes it much harder for your curious little one to make an escape. We must always plan ahead for our baby’s next developmental leap.

Consider the dynamic growth of your infant. They change so quickly. One day they are just lying there, and the next they are a wiggly, active little person. A crib mattress set too high can become a danger zone very fast. Adjusting it protects your child from potential harm. It ensures they remain safe while sleeping or playing quietly inside their crib.

When Is It Time to Lower the Crib Mattress?

Knowing the right time to lower your crib mattress is key to baby safety. The main rule of thumb is to lower the mattress before your baby demonstrates certain physical abilities. You want to make the change preemptively, not reactively. This proactive approach ensures your baby is always safe.

The first major milestone to watch for is when your baby can sit up independently. Once they can sit unassisted, their center of gravity changes. They also gain more upper body strength. At this point, the mattress should move to the next lowest setting. This gives them more vertical space and less opportunity to hoist themselves up.

The next critical indicator is when your baby starts pushing up onto their hands and knees or attempting to pull themselves to a stand. If your baby can pull themselves up using the crib rails, it is definitely time to lower the mattress to its lowest possible setting. Many babies do this around 6 to 8 months of age. Even if they are not successful yet, the attempt is enough of a sign. Do not wait for them to successfully climb out before making the adjustment.

Some cribs have multiple settings: newborn, infant, and toddler. The newborn setting is often the highest, making it easy for parents to reach in and pick up the baby. As your baby grows and becomes more mobile, you transition through these settings. Always check your crib’s specific manual for its recommended age or developmental stage guidelines. The goal is to always have the crib rail high enough so that your child cannot climb over it.

Gathering Your Tools and Preparing for the Task

Before you start lowering the crib mattress, prepare your workspace and gather the necessary tools. This preparation makes the process smooth and safe. Working efficiently saves time and reduces potential frustration. A little planning goes a long way.

First, identify the type of fasteners your crib uses. Most cribs use hex bolts, screws, or cam locks. You will likely need an Allen wrench (hex key), a Phillips head screwdriver, or sometimes a flathead screwdriver. Some cribs might even come with a specialized tool. Check your crib’s original instruction manual. This manual is your best friend for any crib adjustments. If you cannot find it, search online for your crib’s make and model. You might find a digital version.

Next, ensure you have enough space around the crib. You will need room to maneuver the mattress and the support frame. It is often helpful to move the crib away from walls. Clear any rugs or toys from the immediate area to prevent tripping hazards. Consider having a second person assist you. While possible to do alone, two people make lifting and aligning the mattress support much easier and safer.

Finally, prepare a clean, safe place to put the mattress and bedding. You will remove these items from the crib during the process. Having a designated spot keeps them clean and out of the way. Make sure your baby is not in the room when you perform this task. This prevents any accidents or interference. A safe environment for the adjustment process is just as important as the crib’s safety.

Step-by-Step Guide: How to Lower Your Crib Mattress Safely

Lowering a crib mattress is a straightforward process, but it requires careful attention to detail. Follow these steps to ensure a safe adjustment. Each crib model may vary slightly, so always refer to your specific crib’s instruction manual. This general guide applies to most standard cribs.

Removing the Mattress and Base

Start by taking everything out of the crib. Remove the fitted sheet, mattress pad, and the crib mattress itself. Set them aside in a clean area. Next, you need to detach the mattress support frame. This is the part that holds the mattress. It is usually attached to the crib’s end panels with bolts or screws.

Most cribs have metal brackets or hooks on the mattress support frame that slide onto bolts or pins on the crib’s end panels. You will need to loosen or remove the bolts holding the mattress support in place. If your crib uses a spring frame that sits on ledges, you might just need to lift it off. Take note of how the current setup is positioned. This helps you reassemble it correctly.

For most cribs, you will find bolts or screws on the inside of the crib’s end panels that connect to the mattress support. Use your Allen wrench or screwdriver to unscrew these. Do not lose any hardware. Keep all bolts, washers, and nuts together in a small bag or container. This prevents misplacing them.

Adjusting the Mattress Support

Once the mattress support is free, you will see multiple sets of holes on the crib’s end panels. These holes are for different mattress heights. Choose the next lowest set of holes. You are usually moving it down one level at a time as your baby grows. The lowest setting is for when your baby is standing or attempting to climb out.

Align the mattress support with the lower set of holes. If your crib has bolts that slide into slots, ensure they are positioned correctly for the lower slot. If it uses fixed pins or bolts, carefully thread the support onto these. Make sure the support is level and the correct side is facing up. Most mattress supports have labels indicating “this side up” or “front.”

If your crib has specific L-shaped brackets that attach to the mattress support and then to the crib side rails, you will reattach these. The goal is to move the entire support system down to a new, lower level. This step is crucial for achieving the proper safety height.

Reassembling the Crib

Now, reattach the mattress support to the crib frame using the hardware you set aside. Insert the bolts or screws into the new, lower holes. Hand-tighten all fasteners first. This ensures everything is aligned properly before you fully tighten them. Do not overtighten the bolts at this stage.

Once all bolts are in place and hand-tightened, go back and securely tighten each one with your tool. Make sure the mattress support is firmly attached and does not wobble. Check all four corners and any central supports. A stable mattress support is essential for your baby’s safety.

Place the crib mattress back onto the adjusted support. Ensure it fits snugly without large gaps around the edges. Large gaps can be a entrapment hazard for a baby. Put the mattress pad and fitted sheet back on. Your crib is now ready for safe use at its new, lower height.

Double-Checking Everything

After reassembling, perform a thorough safety check. Tug on the mattress support from different angles to ensure it is stable and all bolts are tight. Run your hand along the inside of the crib to check for any sharp edges or exposed hardware. All parts should feel smooth and secure.

Visually inspect the entire crib. Ensure no gaps exist between the mattress and the crib frame that are wider than two fingers. If you have a convertible crib, check that all conversion pieces are still secure, even if not in use. You might also want to test the stability of the entire crib frame by giving it a gentle shake.

Finally, measure the distance from the top of the mattress to the top of the crib rail. For most standard cribs, this distance should be at least 26 inches (66 cm) when the mattress is at its lowest position. This ensures your baby cannot climb or fall out. Your baby is now in a much safer sleeping environment.

Troubleshooting Common Issues When Lowering a Crib Mattress

Even with clear instructions, you might encounter small problems when you try to lower your crib mattress. Knowing how to troubleshoot these common issues can save you time and frustration. Most problems have simple solutions. Do not get discouraged if something does not go perfectly on the first try.

One frequent issue is misplaced or lost hardware. It is easy for small bolts or washers to roll away. If you cannot find a piece, do not attempt to substitute it with a random screw. This can compromise the crib’s safety. Instead, contact the crib manufacturer directly. They often provide replacement parts. You can also visit your local hardware store with an existing piece to find a match. For example, knowing how to fix a crib generally helps with hardware issues.

Another common problem is difficulty aligning the mattress support with the new holes. Sometimes the frame feels too wide or too narrow. This often happens if the crib frame has shifted slightly, or if you are trying to do it alone. If possible, ask another adult to help. One person can hold the support in place while the other guides the bolts into the holes. Sometimes, gently wiggling the crib frame can help align the holes.

You might also find that the mattress support feels wobbly after reassembly. This usually means that not all bolts are fully tightened, or some were not inserted correctly. Go back and re-tighten every single bolt, making sure they are snug but not overtightened. Overtightening can strip the screws or damage the wood. If the wobble persists, check your manual to confirm you used the correct bolts in the right places. Sometimes, the issue might be related to how the crib was originally put together, similar to what you might learn when trying to how to put graco crib together.

Lastly, if your crib instructions are missing and you cannot find them online, try looking for assembly videos specific to your crib model on YouTube or the manufacturer’s website. While the general steps are similar, specific cribs, such as those made by Restoration Hardware, may have unique lowering mechanisms that require a bit more specific guidance. Remember, patience is key.

Understanding Different Crib Types and Adjustments

Not all cribs are created equal when it comes to mattress adjustment. Different designs offer varied methods for lowering the mattress. Understanding these differences helps you approach the task correctly for your specific crib. Always check your crib’s manual for precise instructions.

Standard Cribs

Most traditional, standard cribs have a mattress support that attaches to the crib’s end panels. These supports typically feature several sets of pre-drilled holes at different heights. To lower the mattress, you usually unscrew bolts on the inside of the end panels, detach the mattress support, and then reattach it to the next lower set of holes. These cribs are often straightforward. They follow the general steps outlined previously.

Sometimes, the mattress support rests on metal hangers that slide into grooves or onto pins. In this case, you simply lift the mattress support off the pins, slide it down to the next desired level, and secure it onto the lower set of pins. Always ensure the support is fully seated and level before putting the mattress back in. This type of crib is designed for easy adjustment as your baby grows.

Convertible Cribs

Convertible cribs are designed to transform into toddler beds, daybeds, and sometimes full-size beds. This versatility means they often have more robust construction. Their mattress lowering mechanisms are similar to standard cribs. However, they might involve additional hardware or require temporary removal of other crib components during adjustment. The process of how to raise crib mattress in these types often mirrors the lowering process, just in reverse.

For example, some convertible cribs might have a metal frame that sits on wooden slats or pegs. You would remove the frame, reposition the slats or pegs into lower slots, and then replace the metal frame. Always ensure all conversion hardware is accounted for, even if you are not using it for conversion yet. Proper assembly here guarantees safety in all future configurations.

Specific Brands

Some brands, like Graco, Delta, or DaVinci, have their own specific design nuances. While the general principle of moving the mattress support down remains, the exact fasteners or assembly steps might differ. For example, putting a Graco crib together often involves specific screw types and alignment points. Always consult the brand-specific manual. If you have a Restoration Hardware crib, lowering it might involve unique locking mechanisms or different types of hardware. These premium cribs often have detailed instructions to match their unique designs. If your crib has a drop-side mechanism, ensure it is locked securely at all times. Drop-side cribs are generally not recommended due to safety concerns.

Some older or less common cribs might have a system where the side rails themselves can be lowered, not just the mattress support. If you encounter such a design, exercise extreme caution. These types of cribs have had safety recalls in the past. If you are unsure, contact the manufacturer or a crib safety expert. When dealing with any crib adjustment, safety comes first.

Beyond Lowering: Maintaining a Safe Sleep Environment

Lowering your crib mattress is a major step in baby safety. However, creating a safe sleep environment involves more than just mattress height. It is about a holistic approach to your baby’s sleep space. Every detail contributes to their well-being. Keeping these points in mind ensures continuous safety.

First, always place your baby to sleep on their back. This is the safest sleep position for infants and helps reduce the risk of Sudden Infant Death Syndrome (SIDS). Ensure the crib mattress is firm and fits snugly within the crib frame. There should be no gaps larger than two fingers between the mattress and the crib sides. A well-fitting mattress prevents entrapment hazards.

Avoid placing any soft bedding, toys, or bumpers in the crib. This includes loose blankets, pillows, bumper pads, or stuffed animals. These items pose a suffocation risk to infants. Keep the crib clear. A bare crib with just a fitted sheet on the mattress is the safest option. If you are concerned about your baby feeling comfortable, focus on how to make a crib more comfortable through safe means, like using appropriate sleepwear.

Maintain a comfortable room temperature, between 68-72 degrees Fahrenheit (20-22 degrees Celsius). Dress your baby in sleep-appropriate clothing like a sleep sack or wearable blanket. This removes the need for loose blankets. Place the crib away from windows, blinds, cords, and furniture. These items can be strangulation hazards or provide a climbing step. Always ensure the crib is on a flat, stable surface.

Regularly inspect your crib for any loose hardware, broken parts, or splinters. Tighten any loose bolts promptly. Keep the crib clean. Learn how to clean a crib mattress to maintain hygiene and extend its lifespan. A well-maintained crib ensures long-term safety. Following these guidelines helps your baby sleep soundly and safely through every stage of their growth.

FAQ Section

How many mattress height settings do most cribs have? Most standard cribs offer three or four mattress height settings. The highest setting is for newborns, making it easier for parents to reach. As the baby grows and becomes more mobile, the mattress gets lowered to the middle and then the lowest setting. The number of settings varies by brand and model.

Can I lower a crib mattress by myself? Yes, you can often lower a crib mattress by yourself. However, it is much easier and safer with two people. An extra set of hands helps with lifting the mattress support and aligning the bolts. If working alone, be cautious and take your time to prevent injuries or damage.

What if my crib instructions are missing? If your crib instructions are missing, do not worry. First, check the manufacturer’s website; most have PDF versions available for download. Search for your crib’s brand and model number. If you cannot find them, you can often follow general instructions, but proceed with caution and identify the type of hardware your crib uses before starting.

Is it okay to skip a mattress setting? It is generally not recommended to skip mattress settings unless your baby is rapidly growing or showing advanced mobility. Follow the progression from highest to lowest. Skipping levels means less time at a safer intermediate height. Only lower to the very lowest setting when your baby can pull themselves to a stand.

When should I lower the crib mattress for a newborn? You do not lower the crib mattress for a newborn. A newborn usually uses the highest mattress setting. This makes it convenient for parents to lift the baby in and out without excessive bending. You only start lowering the mattress once your baby begins to show signs of mobility, typically around 3-6 months of age.

Conclusion

Lowering your crib mattress is a crucial step in ensuring your baby’s safety as they grow. This adjustment prevents falls and keeps your little one securely contained. Remember to monitor your baby’s developmental milestones, especially when they begin to sit up or pull themselves to a stand. Prompt action in lowering the crib mattress can prevent serious accidents.

Always refer to your crib’s specific instruction manual for the most accurate guidance on how to lower crib mattress. Gather your tools, clear your space, and if possible, enlist a helping hand. A careful, step-by-step approach ensures proper reassembly and stability. Beyond just the mattress height, maintain a safe sleep environment by keeping the crib clear of soft bedding and regularly inspecting its condition. Your vigilance helps provide a safe and restful space for your child. Make this simple adjustment today for your baby’s continued well-being.

Todd Martin profile picture

Todd Martin

Senior Writer

With over 15 years of experience in home renovation and design, I started HEG to share what I’ve learned with homeowners who want to create spaces that are both beautiful and functional. I’ve always believed in a hands-on approach, and over the years, I’ve picked up practical solutions that actually work. Through HEG, I aim to make home improvement more approachable, sharing real tips that help you create a home you truly love.

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