Question 1

What is the cost to address deck board gaps from shrinkage in New Brunswick?

Accepted Answer

Addressing deck board gaps from shrinkage typically costs $300-$1,200 for most New Brunswick decks, depending on the gap size and your chosen solution. The cost varies significantly based on whether you need simple gap filling, board replacement, or complete re-spacing of the entire deck surface.

Understanding Shrinkage in New Brunswick's Climate

Deck board shrinkage is particularly common in New Brunswick due to our extreme temperature swings and moisture cycles. Pressure-treated lumber can s

Question 2

What is the cost to remediate mold and mildew on a deck in Moncton NB?

Accepted Answer

Mold and mildew remediation on a Moncton deck typically costs $300-$1,200 for DIY cleaning supplies and equipment rental, or $800-$2,500 if you hire a professional cleaning service. The final cost depends on your deck size, severity of contamination, and whether structural repairs are needed.

DIY Remediation Costs for a typical 200 sq ft deck in Moncton run $300-$600. You'll need a pressure washer rental ($60-$80/day), deck cleaner with mold/mildew killer ($40-$80), brightening solution ($30-$5

Question 3

How much does it cost to fix improper deck drainage in Fredericton NB?

Accepted Answer

Fixing improper deck drainage in Fredericton typically costs $800-$3,500 depending on the severity and scope of the problem. Minor fixes like adding slope or improving surface drainage run $800-$1,500, while major structural repairs involving joist replacement or foundation work can reach $2,500-$3,500.

The cost varies significantly based on what's causing your drainage issues. Surface-level problems are the most affordable to fix — adding proper deck slope, installing drainage gaps between boa

Question 4

Why is my new deck stain not drying properly in Moncton NB?

Accepted Answer

Deck stain that remains tacky or wet long after application is almost always caused by one or a combination of three factors: the stain was applied too thickly, the temperature was too low, or the humidity was too high — and Moncton's Maritime climate makes the last two particularly common culprits. New Brunswick's coastal proximity creates conditions that can extend stain dry times well beyond what the product label suggests.

Most exterior deck stains require a minimum temperature of 10 degree

Question 5

What causes black spots on my cedar deck in New Brunswick?

Accepted Answer

Black spots on cedar decking are caused by a chemical reaction between the wood's natural tannins and iron, typically introduced by metal fasteners, railings, or even iron-rich water splashing onto the deck surface. This is one of the most common aesthetic complaints among cedar deck owners in New Brunswick, and while it looks alarming, it is a surface stain rather than a sign of rot or structural damage.

Cedar is naturally rich in tannins — the same organic compounds that give the wood its bea

Question 6

How do I fix gaps between deck boards that have shrunk in Bathurst NB?

Accepted Answer

Gaps between pressure-treated deck boards after installation are completely normal — pressure-treated lumber is saturated with preservative solution at the mill and will shrink as it dries over its first one to two years, with gaps up to 1/4 inch being typical and expected. In Bathurst and along New Brunswick's north shore, the Maritime climate means this drying process can take longer than in drier regions, but the shrinkage will still occur.

When pressure-treated wood arrives at the lumber ya

Question 7

Why is my deck railing loose and how do I tighten it in Fredericton NB?

Accepted Answer

Loose deck railings are most commonly caused by fastener fatigue, post-to-frame connection failure, or wood shrinkage at the post base — and in Fredericton's climate, freeze-thaw cycling accelerates all three. A wobbly railing is not just an annoyance; it is a safety hazard that needs prompt attention, especially if your deck is more than 24 inches above grade where the New Brunswick Building Code requires railings to withstand a minimum 50-pound-per-foot lateral load.

The first thing to check

Question 8

How do I stop my deck from shaking when people walk on it in Moncton?

Accepted Answer

A deck that shakes when people walk on it lacks lateral bracing, has undersized joists with excessive spans, or suffers from both conditions simultaneously. The shaking you feel is different from simple bounciness. Bounce is vertical deflection at mid-span, while shaking involves the entire structure swaying or vibrating side to side, which indicates the frame is not rigid enough to resist lateral forces. In Moncton, where decks must also withstand wind loads off the Petitcodiac River and signif

Question 9

What causes white residue on composite decking in New Brunswick?

Accepted Answer

White residue on composite decking is almost always efflorescence — a mineral salt deposit that migrates to the surface when moisture trapped inside the boards evaporates. This is particularly common in New Brunswick due to the province's Maritime climate, where high humidity, frequent rain, and dramatic temperature swings between seasons create the perfect conditions for moisture cycling through composite materials.

Efflorescence typically appears during the first one to two years after instal

Question 10

How do I fix squeaky deck boards in Dieppe NB?

Accepted Answer

Squeaky deck boards are caused by loose fasteners that allow the board to move against the joist, and in Dieppe's freeze-thaw climate, this is one of the most common deck complaints. The squeak itself is the sound of wood rubbing against the shaft of a nail or screw as the board flexes slightly under foot traffic. The fix is straightforward and well within the ability of most homeowners.

Dieppe typically experiences over 140 freeze-thaw cycles per year, and each cycle works against your deck fa

Question 11

Why are my deck post bases rotting in Riverview NB?

Accepted Answer

Your deck post bases are rotting because the wood is in direct or near-direct contact with the ground without adequate drainage, and ground-level moisture is wicking into the end grain of the posts continuously. End grain absorbs water at 10 to 15 times the rate of face grain, so even pressure-treated lumber will deteriorate when the base sits in a persistently wet condition. In Riverview, where the Petitcodiac River valley's clay-heavy soils retain moisture and the water table can be high in lo

Question 12

What causes deck stain to peel in New Brunswick's Maritime climate?

Accepted Answer

Deck stain peels in New Brunswick primarily because it was applied to wood that was too wet, applied during unsuitable weather conditions, or applied over an existing finish that was not fully removed. The Maritime climate creates a narrow window for successful stain application, and missing that window is the root cause of most peeling failures across the province.

New Brunswick's humidity is the central challenge. The province's average relative humidity hovers between 70 and 85 percent from

Question 13

Why is water pooling on my deck surface in Moncton NB?

Accepted Answer

Water pools on your deck because the surface lacks adequate slope away from the house, individual boards have warped, or both problems are occurring simultaneously. Standing water on a deck is more than an inconvenience in Moncton. With the city's approximately 1,150 mm of annual precipitation and frequent spring rain events, pooled water accelerates wood decay, promotes algae growth, and creates slip hazards that persist long after the rain stops.

The primary cause of pooling is insufficient s

Question 14

How do I fix a deck that is pulling away from the house in Saint John NB?

Accepted Answer

A deck pulling away from the house is a failed ledger board connection, and it is the single most dangerous structural defect a deck can have because it risks sudden catastrophic collapse. This is not a cosmetic issue or a gradual maintenance concern. In Saint John, where decks are often elevated due to the city's hilly terrain, a ledger failure can mean a fall of 8 to 15 feet or more, causing serious injury or death. Treat this as an emergency and restrict access to the deck until the repair is

Question 15

Why are my deck boards cupping and how do I fix it in Fredericton?

Accepted Answer

Deck boards cup because of a moisture differential between the top and bottom faces of the board, and in Fredericton's continental-Maritime climate with its wide humidity swings, this is an extremely common problem. Cupping is the concave or convex warping across the width of a board, and understanding why it happens is the key to fixing and preventing it.

Wood gains and loses moisture unevenly. The top surface of a deck board is exposed to sun, wind, and rain, so it dries out faster and more c

Question 16

What causes green algae to grow on my deck in New Brunswick?

Accepted Answer

Green algae thrives on New Brunswick decks because the province's Maritime climate delivers the exact combination of persistent humidity, moderate temperatures, and frequent rain that algae needs to colonize wood and composite surfaces. It is one of the most common deck maintenance issues across the province, from the Bay of Fundy coast to the Saint John River valley.

Algae is a simple plant organism that reproduces through airborne spores. Those spores are everywhere, and they settle on every

Question 17

Why is my deck bouncy or springy when I walk on it in Moncton NB?

Accepted Answer

A bouncy or springy deck is caused by undersized joists, excessive joist spans, or both, and it is a structural issue that should not be ignored. While a little flex might seem harmless, that movement indicates the framing is being stressed beyond its comfortable capacity, and over time it leads to fastener failure, cracked boards, and potentially dangerous structural problems.

The most common cause in Moncton-area decks is joists that span too far without intermediate support. The National Bui

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