Stop the leak. Do it beautifully.
Valordek vinyl decking seals your balcony with a heat-welded PVC membrane, and gives you a finished outdoor surface worth spending time on. 12 colours. No caulk lines. No recoats. No more water finding its way to the room below.
If you're seeing any of these, your balcony has lost its waterproof layer.
Balconies fail slowly. The coating cracks first, water gets behind it, the plywood underneath rots, and by the time it shows up on the ceiling below — the repair is now five times bigger.
Stains or water marks on the ceiling below
The single clearest sign. Water has been getting through the balcony surface for months, soaked the substrate, and is now reaching the ceiling underneath. Fix the balcony, not the ceiling.
Black sludge or dark drips at the balcony edge
Trapped water mixing with rotting plywood and debris. By the time sludge appears, the structural substrate is compromised — needs full replacement of the surface, not another coat of paint.
Cracks, blisters, or peeling in the coating
Every crack is now an entry point. Liquid coatings and elastomeric paints fail at thermal cycling within 3-7 years. Once they crack, no amount of re-coating restores the seal.
Soft spots when you walk across the deck
Substrate rot. The plywood underneath has lost integrity. Replacing the surface is now also a structural repair — sooner is much cheaper than later.
Paint chipping on the wall above the deck
Water is wicking up the wall behind the failed surface. The flashing detail at the wall transition has lifted. Caulk and tape repairs won't hold long-term.
Musty smell or visible mold in the unit below
Late stage. Water has been there long enough to grow mold. Address the balcony immediately before drywall, framing, and air quality get worse.
One continuous, heat-welded surface. No caulk lines to fail.
Valordek Fuzzy-Back (68mil PVC) is engineered for balcony use. It bonds full-coverage to your substrate, welds at the seams, and seals at every wall and drip edge — turning a leaking balcony into a watertight surface that lasts 10+ years.
Fuzzy-Back 68mil PVC membrane
Heavy-duty backing bonds aggressively to plywood, concrete, or existing substrate. Single continuous sheet, heat-welded at every seam. UV-stable, performs from −40°C to 80°C, walks cleanly, doesn't crack.
Drip flashing at every edge
PVC drip flashing wraps over the perimeter and bonds to the membrane. No more water sneaking behind the surface at the edges — the single point where caulk-based systems always fail first.
Wall flashing & transitions
PVC wall flashing welds directly to the membrane and runs up under siding or trim. Every transition where the surface meets a wall, post, or drain is a single waterproof piece — not caulk on top of caulk.
10-year waterproofing warranty
Backed by Valordek's parent (All Seasons Waterproofing, 25+ years). Independently tested by Intertek and CCMC-certified. 5-year appearance warranty on top. Read the warranty →
Built for the conditions balconies actually face.
Cantilevered concrete, sloped plywood, exposed corners, full sun, freeze-thaw cycles, foot traffic, BBQs, planters, kids, pets. Valordek vinyl was designed for all of it.
Thickness
Twice the thickness of typical liquid coatings.
Waterproof warranty
Backed by 25+ years of All Seasons Waterproofing.
Installation
Many homeowners install Fuzzy-Back themselves. See accessories.
Colour options
Wood Look, Stone Look, and Classic patterns.
Will Valordek work on your balcony?
Almost every balcony can be Valordek-ready with the right prep. Here's how Fuzzy-Back vinyl handles the four most common balcony substrates we see in the field.
Concrete balcony
Whether cantilevered off a multi-storey building or supported on posts, concrete is the most common balcony substrate. Once it's cleaned, patched at any spalling, and primed, Fuzzy-Back's contact adhesive bonds directly to the surface. No demolition needed if the concrete is structurally sound.
Look for: cracks, spalling, exposed rebar, water staining underneath. Repair before membrane goes down.
Plywood deck
Common on residential balconies built on wood framing. Plywood works as a Valordek substrate if it's dry, structurally sound, and sloped at least 1/4″ per foot toward the drip edge. Any rotted or delaminated sections need to be replaced before the Fuzzy-Back goes down.
Look for: soft spots, water staining on the underside, lifted seams. Replace bad panels, don't just paint over.
Intact waterproof coating
If you've already got a liquid coating or elastomeric paint and it's still well-bonded and the substrate beneath is dry, Fuzzy-Back can often go directly over it after a proper prep and prime. Saves removing the old coating. A Valordek dealer should assess before quoting either way.
Look for: peeling, blistering, cracking. If any of those are present, treat as a failed coating.
Failed coating or rotted substrate
The most common reason balconies need replacement. Strip the failed coating, repair or replace damaged plywood or concrete, dry everything out, then Fuzzy-Back goes down as the new continuous waterproof layer. Adds prep work, but the only path to a long-term seal.
Look for: stains on the room below, soft underfoot, black sludge at the edge, musty smell. Address the source, not the symptom.
Starting at $3.74/sq ft.
Most balconies are 80–200 sq ft. Use our calculator to estimate materials for your specific size — adhesive, flashing, and U-Lock clips included.
Try the cost calculator →Balcony waterproofing FAQ.
How do I fix a balcony leaking into the room below?
Don't repair the ceiling — repair the balcony. By the time water reaches the room below, the balcony's waterproof layer has failed and the substrate is likely soaked. Stop the source: remove the failed coating, dry and repair the substrate, then install a continuous waterproof surface like Valordek vinyl. A liquid recoat won't hold. Find a Valordek dealer to assess your balcony.
What causes a balcony to leak?
Three failure modes account for almost every balcony leak: (1) cracks in the existing coating from thermal cycling, (2) failed flashing at the wall transition where caulk has lifted, and (3) failed flashing at the perimeter drip edge. All three are repairs that liquid coatings can't make permanently — they require a continuous membrane system.
How much does balcony waterproofing cost?
Valordek Fuzzy-Back starts at $3.74 per square foot for materials. A typical 100 sq ft balcony's material cost is around $375 for vinyl, plus accessories (adhesive, drip flashing). Total installed cost depends on substrate condition and whether you DIY or hire a certified installer. Try the calculator for your specific size.
How long does balcony waterproofing last?
Valordek Fuzzy-Back carries a 10-year waterproofing warranty and a 5-year appearance warranty. Properly installed and maintained installs routinely last 15+ years. Compare to liquid coatings which generally need recoating every 3-7 years to keep their waterproof layer intact. Read the full warranty terms.
Can I waterproof my balcony myself (DIY)?
Yes — Fuzzy-Back is designed to be DIY-friendly. The membrane + contact adhesive + drip flashing + U-Lock clip system is straightforward for someone comfortable with home projects. You'll need the membrane, adhesive, flashing, U-Lock clips, and basic tools (utility knife, roller, J-roller). See all installation accessories.
What is the best waterproofing membrane for a balcony?
The best balcony waterproofing membrane is one that's: (1) a single continuous sheet (no joints to fail), (2) heat-welded at any seam, (3) flashed at every edge and wall transition, and (4) independently certified for waterproof use. Valordek vinyl meets all four. See the full waterproofing system →
Can I install vinyl decking over an existing balcony coating?
Sometimes — depends on the existing coating's condition. If the coating is intact, well-bonded, and the substrate beneath is dry and solid, Valordek can be installed over it. If the coating is failing, cracked, or there's substrate rot, those areas need to be repaired or removed before the membrane goes down.
Fix the balcony. Not just the ceiling below.
Talk to a Valordek dealer about your project. We'll help you scope what's needed, get accurate material counts, and connect you with a certified installer if you'd rather not DIY.