How To Build A Simple DIY Cat Tree Using Cardboard And Sisal Rope

Cats are natural climbers, scratchers, and perch-seekers. Providing them with vertical space not only satisfies their instincts but also reduces stress and prevents destructive behavior on furniture. While commercial cat trees can be expensive and bulky, building your own from readily available materials like cardboard and sisal rope is both cost-effective and environmentally friendly. This guide walks through the entire process of creating a sturdy, engaging cat tree that supports scratching, lounging, and play—all without complex tools or carpentry skills.

Why Cardboard and Sisal Rope Work Best

Cardboard and sisal rope are ideal materials for DIY cat furniture due to their durability, texture, and accessibility. Corrugated cardboard offers a satisfying surface for cats to scratch—it’s fibrous, slightly yielding, and mimics the feel of natural bark. When layered or rolled tightly, it becomes surprisingly strong and can support moderate weight for perching.

Sisal rope, made from agave plant fibers, is a favorite among cats for claw maintenance. Its coarse texture helps shed the outer layers of claws while providing excellent grip during vigorous scratching. Unlike synthetic ropes, sisal doesn’t unravel easily and resists moisture and wear over time.

“Cats need appropriate outlets for scratching. A well-built DIY structure using sisal and cardboard gives them a healthy alternative to your sofa.” — Dr. Lena Torres, Feline Behavior Consultant

Tip: Use double-walled or triple-walled corrugated cardboard for load-bearing platforms to increase stability.

Materials and Tools You’ll Need

This project uses common household or hardware store items. Most components are recyclable or repurposable, aligning with sustainable pet ownership.

Material/Tool	Purpose	Recommended Quantity
Corrugated cardboard sheets (double-thick)	Main structure, platforms, base	3–5 large sheets (e.g., 36” x 48”)
Sisal rope (⅜” or ½” diameter)	Wrapping posts for scratching	50–100 feet, depending on height
Non-toxic wood glue or craft adhesive	Bonding cardboard layers and securing rope	1–2 bottles
Hot glue gun + non-toxic glue sticks	Quick attachment of rope ends and structural joins	1 gun, 5–10 sticks
Utility knife or box cutter	Cutting cardboard precisely	1
Ruler and pencil	Measuring and marking cuts	1 each
Scissors	Cutting rope and trimming edges	1 pair
Round cardboard tubes (optional)	Pre-made core for posts (e.g., from carpet rolls)	1–2, 3–4” diameter

If you don’t have access to thick cardboard, consider visiting local appliance or electronics stores—they often discard heavy-duty shipping boxes. Avoid wax-coated or glossy cardboard, as these resist adhesives and may contain chemicals unsuitable for pets.

Step-by-Step Construction Guide

Follow this sequence to assemble a stable, multi-level cat tree with at least one scratching post and a resting platform.

1. Design Your Layout: Sketch a basic design. A simple version includes a wide base (18” x 24”), one vertical post (18–24” tall), and a top platform (12” x 12”). More advanced builds can include staggered shelves or multiple posts.
2. Cut and Reinforce the Base: Cut a rectangle from double-thick cardboard. For added strength, glue two layers together and let dry under light pressure (e.g., place books on top). This prevents wobbling when your cat jumps.
3. Create the Post Core: Use a sturdy cardboard tube or roll several layers of cardboard into a tight cylinder. Secure each layer with wood glue before rolling the next. Aim for a diameter of at least 3.5 inches so cats can wrap their paws fully around it.
4. Attach the Post to the Base: Apply generous hot glue or craft adhesive to the bottom edge of the post. Center it on the base and hold firmly for 30 seconds. Let cure completely (at least 2 hours) before proceeding.
5. Wrap the Post with Sisal Rope: Starting at the bottom, apply a dab of hot glue and press the rope end onto the post. Wrap tightly upward in a spiral, overlapping slightly. Add a drop of glue every 2–3 inches to prevent loosening. Trim and secure the end with glue at the top.
6. Build the Platform: Cut a square or circular platform from two glued layers of cardboard. Optionally, line the top with leftover sisal scraps or a soft fabric swatch for comfort. Ensure it’s at least 12 inches wide for lounging.
7. Mount the Platform: Position it near the top of the post. Support it with triangular cardboard braces glued underneath if needed. Secure with adhesive and allow 4+ hours to set.
8. Optional Enhancements: Add dangling toys from the platform, create a lower hideout from a box, or paint edges with non-toxic sealant for moisture resistance.

Tip: Wrap the sisal rope in a consistent direction—always clockwise or counterclockwise—to maintain even tension and appearance.

Testing Stability and Safety

Before allowing your cat to use the tree, conduct a few simple checks. Gently shake the structure to test for wobbling. If unstable, reinforce the base with additional cardboard layers or add rubber pads to the bottom corners to improve floor grip.

Inspect all glued joints and rope attachments. Pull lightly on the sisal to ensure it won’t unravel. Make sure no sharp edges remain from cutting—fold or tape exposed corrugation flaps.

Introduce the cat gradually. Place treats or catnip on the platform to encourage exploration. Monitor their first interactions to confirm confidence and safety.

Do’s and Don’ts for Longevity

Do	Don’t
Use non-toxic, pet-safe adhesives	Use staples, nails, or toxic glues
Replace worn sisal or damaged platforms promptly	Ignore loose rope or collapsing sections
Place the tree near a window or sunny wall	Put it in high-traffic areas where it can be knocked over
Rotate or flip platforms to extend life	Expose it to damp or humid environments

Real-Life Example: Maya’s Apartment-Friendly Cat Tree

Maya, a graphic designer living in a small Brooklyn apartment, wanted a space-saving solution for her two rescue cats, Leo and Nala. She built a narrow cat tree using leftover packaging cardboard from her freelance deliveries and 75 feet of sisal rope purchased online for $12. Her design stood 22 inches tall with a single post, a base measuring 16” x 10”, and a circular perch on top.

She reinforced the base with three glued layers and used a recycled carpet tube as the post core. After wrapping it tightly with sisal, she attached the platform and let it cure overnight. To make it more inviting, she draped a feather toy from the edge.

Within hours, Leo was scratching vigorously and Nala claimed the top as her nap spot. Six months later, the structure remains intact, with only the sisal on the lower third showing wear—easily repaired by rewrapping a short section.

“Simple doesn’t mean low-quality. Maya’s tree meets all the behavioral needs of her cats—and fits perfectly beside her desk.” — Jason Reed, Urban Pet Habitat Designer

Maintenance and Upgrades Over Time

A cardboard-sisal cat tree isn’t meant to last forever, but with care, it can serve your cat for 1–2 years. Inspect monthly for signs of fraying, weakening joints, or soft spots in the cardboard.

When the sisal wears thin, unwind the old rope and replace it. You can reuse the same post if the core is still firm. Platforms can be flipped or replaced individually. Consider upgrading to a larger footprint or adding a second level as your cat grows or gains confidence.

• Wipe surfaces with a dry cloth; avoid wet cleaning.
• Keep away from radiators or direct sunlight to prevent warping.
• Store spare sisal rope and glue for quick repairs.

Frequently Asked Questions

Can kittens use a cardboard cat tree?

Yes, as long as the structure is stable and free of small detachable parts. Kittens benefit greatly from early access to scratching surfaces, which helps develop healthy claw habits.

How do I stop my cat from scratching other furniture after installing the tree?

Place the tree near the furniture they previously scratched. Use catnip or pheromone spray on the sisal to redirect attention. Cover unwanted areas temporarily with aluminum foil or double-sided tape.

Is it safe if my cat eats small pieces of cardboard?

Minor nibbling is common and usually harmless, but large ingestions can cause blockages. Discourage chewing by offering chew-safe alternatives like cat grass or dental treats.

Checklist: Build Your Cat Tree in One Afternoon

1. Gather materials: cardboard, sisal rope, glue, cutting tools
2. Design layout with base, post, and platform dimensions
3. Cut and bond base layers for stability
4. Construct or source a sturdy post core
5. Attach post securely to base; allow full curing time
6. Wrap post tightly with sisal rope using adhesive every few inches
7. Build and mount platform at desired height
8. Test stability and inspect for sharp edges
9. Introduce to cat with treats or toys
10. Schedule monthly maintenance checks

Conclusion: Empower Your Cat’s Natural Instincts

Building a DIY cat tree from cardboard and sisal rope isn’t just a weekend project—it’s an investment in your cat’s physical and mental well-being. With minimal cost and effort, you create a custom space that encourages healthy scratching, climbing, and relaxation. The best part? It’s adaptable, eco-conscious, and tailored to your home’s layout.

💬 Ready to build yours? Start collecting cardboard this week and share your creation story in the comments—photos welcome!