How to Waterproof Outdoor Structures Built With Recycled Bricks (Without Losing Your Mind)
So, you’ve decided to build something epic with recycled bricks—a rustic retaining wall, a charming brick edging for your garden, or maybe a patio that screams “I’ve got style and sustainability cred.” But wait… have you thought about what happens when Mother Australia decides to throw a tantrum with a downpour? Let’s just say soggy, crumbling bricks aren’t exactly the vibe you’re after.
Here at The Brick Pit, we’ve seen it all—from Sydney’s surprise storms flooding backyard projects to Perth’s relentless sun baking the life out of unsealed pavers. We’re obsessed with giving old used bricks a second life (and making sure they stay alive). Today, we’re sharing our hard-earned tricks to waterproof your outdoor structures like a pro. And hey, if you get stuck, you know where to find us—just search “recycled bricks near me” and we’ll pop up faster than a kangaroo in a veggie garden.
Why Waterproofing Recycled Bricks is Non-Negotiable
Let’s cut to the chase: old used bricks are porous. They’ve spent decades (or centuries!) soaking up rain, dirt, and probably a few questionable liquids. Without waterproofing, they’ll act like a sponge, trapping moisture that leads to:
- Cracking during freeze-thaw cycles (yes, even in Brisbane winters)
- Efflorescence—that weird white powder that makes your bricks look like they’ve been dusted with cocaine
- Structural weakness, especially for retaining walls holding back tonnes of soil
FYI: Sandstock bricks and reclaimed red bricks are especially thirsty. They’re like the Labrador of building materials—eager to absorb everything.
Step 1: Clean Those Bricks Like Your Project Depends on It (Because It Does)
Ever tried painting over mud? Yeah, waterproofing dirty bricks works about as well. Here’s how we prep bricks at The Brick Pit:
For light dirt:
- Scrub with a stiff brush and mild detergent.
- Rinse thoroughly (a garden hose works, but a pressure washer on low setting is better).
For stubborn grime or mortar remnants:
- Use a vinegar-water mix (1:3 ratio) or a specialized masonry cleaner.
- Pro tip: Wear gloves unless you want your hands to smell like a fish ’n’ chip shop for days.
Step 2: Choose Your Waterproofing Weapon
Not all sealers are created equal. Here’s the lowdown:
| Product Type | Best For | Pros | Cons |
|---|---|---|---|
| Silane/Siloxane Sealers | Retaining walls, pavers | Penetrates deep, doesn’t alter color | Pricey, but worth it for high-traffic areas |
| Acrylic Sealers | Brick edging, garden features | Easy to apply, budget-friendly | Needs reapplication every 1–2 years |
| Polyurethane Coatings | Vertical structures (e.g., feature walls) | Ultra-durable, UV-resistant | Can create a glossy finish (not everyone’s cup of tea) |
Our go-to? Siloxane sealers for anything that needs to survive Australia’s mood swings. Bonus: They let bricks “breathe,” which is crucial for preventing trapped moisture.
Step 3: Apply the Sealer Like You Mean It
- Timing is everything: Apply on a dry, overcast day. Direct sun = sealer drying too fast = streaky mess.
- Tools: Use a roller for large surfaces (like paving bricks) and a brush for crevices.
- Coats: Two thin coats > one gloopy disaster. Let the first coat dry completely—patience, grasshopper.
Anecdote time: Once had a client in Perth skip the second coat to “save time.” Let’s just say their “rustic” patio now looks like a Dalmatian. Don’t be that person.
Common Mistakes (And How to Avoid Them)
- Sealing damp bricks: Moisture + sealer = bubbling flakiness. Test with plastic wrap—tape it to the brick overnight. Condensation? Let it dry another day.
- Ignoring drainage: Waterproofing won’t save a retaining wall sitting in a puddle. Slope the base, add gravel, or install a weep hole.
- Using the wrong product: Acrylic sealers on a driveway? Prepare for heartbreak (and frequent reapplications).
“But What About Brick Disposal?” (We’ve Got You Covered)
Accidentally ordered too many second hand bricks? The Brick Pit offers eco-friendly brick disposal across Sydney, Brisbane, and beyond. We’ll even take those chipped red bricks off your hands—no judgement here.
FAQs: Your Questions, Our Sarcasm-Free Answers
Q: Can I waterproof bricks myself, or should I hire a pro?
A: If you can paint a fence, you can seal bricks. Just follow the instructions (and maybe don’t multitask with a beer in hand).
Q: How often should I reapply sealant?
A: Every 2–5 years, depending on the product and weather. Pro tip: Set a reminder. Future You will be grateful.
Q: Will waterproofing change the color of my reclaimed bricks?
A: Most sealers enhance the natural color without a glossy finish. Test a small area first—because surprises are for birthdays, not DIY projects.
Wrapping Up: Keep Calm and Waterproof On
There you have it—a no-BS guide to keeping your recycled brick structures looking sharp through storms, scorchers, and everything in between. Whether you’re in Sydney battling coastal humidity or Melbourne pretending winter isn’t happening, waterproofing is your secret weapon.
And hey, if you’re hunting for quality sandstock bricks or need advice on your next project, The Brick Pit is your closest brick whisperer. Drop us a line or search “recycled bricks near me” to find our yards across Australia. Because life’s too short for crumbling retaining walls. 🙂
Ready to start? Grab your sealer, channel your inner brick guru, and let’s make those old used bricks indestructible. (Or just call us—we’ll handle the heavy lifting.)
