Installing an Inground Trampoline

Step-by-Step Guide to installing an Inground Trampoline!

Why Install an Inground Trampoline?

An inground trampoline offers several advantages:

1. Safety

• No climbing required, reducing the risk of falls.
• Easier access for young children.

2. Aesthetics

• Blends seamlessly into your garden design.
• Suitable for both modern and playful garden styles.

3. Weather Resistance

• Less affected by strong winds, making it ideal for open areas.
• No risk of the trampoline being blown away during storms.

When is an Inground Trampoline Not Ideal?

• High groundwater levels: Consider a shallower inground trampoline.
• Underground utilities or foundations: Check the ground before digging.
• Frequent relocation: Above-ground trampolines are easier to move.

Which Trampoline Can Be Installed In-Ground?

Not all trampolines are suitable for inground installation. Here are the most common options:

1. Inground Trampoline

• Depth: 50-65 cm.
• Pros:
  • Less digging required.
  • More affordable.
  • Reduces water retention with high groundwater levels.
  • Compatible with robotic lawnmowers due to raised edges.
  • Offers better bounce than flat-to-the-ground models with a dense jumping mat.
• Cons:
  • Sits 20-25 cm above the ground, requiring a step up.

2. Flat-to-the-Ground Trampoline

• Depth: 70-110 cm (depending on size and bounce quality).
• Pros:
  • Fully integrated into the ground, no step required.
  • Includes a standard retaining wall system.
  • Stable in position, reducing sinking and movement.
  • Stronger frame construction.
• Cons:
  • Requires more digging.
  • Higher purchase cost.
  • Less suitable for robotic lawnmowers.

Can You Bury a Standard Trampoline?

Yes, but it requires extra work such as building a retaining wall and burying the legs. This approach is labor-intensive, less aesthetically pleasing, and less durable.

Step-by-Step Inground Trampoline Installation Guide

Step 1: Choose the Right Location

• Ensure at least 65 cm of free space around the trampoline.
• The ground should be stable and level.
• Check for underground obstacles like trees, roots, and walls.
• Front yard: File a KLIC report for underground cables and pipes.
• Backyard: Check for personal utilities like lighting or irrigation.

video

Step 2: Dig the Hole

• Use the trampoline frame or provided marking tape as a guide.
• Depth requirements:
  • Inground trampoline: 50-65 cm.
  • Flat-to-the-ground trampoline: 70-110 cm.
• Digging tips:
  • Use a mini-excavator for larger trampolines.
  • Ensure the base is stable to prevent sinking.
  • Create a steep enough slope to avoid hitting the edge while bouncing.

Step 3: Prepare the Base

• Lay weed barrier fabric to prevent weed growth.
• Alternative base materials: gravel, wood chips, artificial grass.

Step 4: Assemble the Trampoline

• Assemble the trampoline outside the hole, including the jumping mat and springs (without the safety pad).
• Prevent creaking by lubricating the frame connections with thick grease or copper paste.
• Carefully lower the trampoline into the hole with two people.
• Ensure the trampoline sits level and stable. If unstable, adjust the hole.
• Bounce test: Ensure the center is deep enough to prevent ground impact.
• Flat-to-the-ground trampolines: Once properly positioned, fill around the frame with remaining soil.
• Attach the safety pad and net (if applicable).

Step 5: Finish the Surrounding Area

Finishing options include:

• Grass sods
• Artificial turf
• Wood chips
• Rubber tiles
• Paving (if using a safety net)

Common Installation Issues & Solutions

1. Water Accumulation in the Pit

• Rainwater: Wait for it to drain naturally.
• Poor drainage: Add gravel or use a sump pump.
• High groundwater: Dig a shallower hole or raise the trampoline slightly.
• Watch our drainage solution video: [YouTube link]

2. Ground Sinking

• Ensure a firm base or use a retaining wall to prevent shifting.

3. Noise Issues

• Squeaking & creaking: Ensure the frame is fully supported. Even minor movement can cause noise.
• Apply grease to frame connections to prevent squeaks.
• Loud bouncing noise: Use an open-weave jumping mat (e.g., Akrobat AkroAir or AkroVentSport) to allow airflow.
• If the trampoline is not designed for airflow, raise it slightly to create a gap for air to escape (minimum 25 cm clearance).

How Much Soil Will Be Excavated?

Here’s an estimate of the soil volume removed during installation:

Trampoline Size	Inground (m³)	Flat-to-the-Ground (m³)
Round 250 cm	1.6	2.5
Round 305 cm	2.4	4.0
Round 365 cm	4.0	6.0
Round 430 cm	6.0	9.1
Rectangular 305×183 cm	1.6	3.5
Rectangular 355×244 cm	2.4	5.0
Rectangular 430×305 cm	–	9.3
Rectangular 520×305 cm	–	11
Rectangular 520×365 cm	–	16.5

What to Do with the Extra Soil?

• Rent a soil removal container.
• Offer it for free on local marketplaces.
• Check if your local waste center accepts soil.
• Contact nearby contractors for disposal.

Professional Inground Trampoline Installation

No time or experience? Use the 12SPRINGS Installation Service! Our team ensures a professional and secure setup.

Requirements:

• Minimum 85 cm of access space to the backyard.
• Sharp turns require at least 150 cm of free space.

Installation Pricing:

• Inground Trampoline (Rectangular)
• Inground Trampoline (Round)
• Flat-to-the-Ground Trampoline (Rectangular)
• Flat-to-the-Ground Trampoline (Round)

Order online or contact us for a free quote.

Conclusion

Installing an inground trampoline enhances safety and aesthetics in your garden. With the right preparation, you’ll enjoy years of bouncing fun. Need expert advice? Contact 12SPRINGS, your trampoline specialist!

Need Help?

Our experts are here for you. Call or email us for personal advice or a quote for our installation service.