How long does a full roof replacement typically take?

Most residential roof replacements take one to three days depending on the size and complexity of the roof, plus weather. We schedule around forecasts as much as possible so the deck isn't left exposed to rain overnight.

What should I ask a roofing contractor before hiring them for a job in Aldergrove?

Ask whether they're licensed and insured to work in your area, whether they pull permits when required, and whether they'll put the material specifications and scope in writing before starting. It's also worth asking how they handle wind-driven rain and moss specifically, since those are the conditions that separate a roof that lasts from one that doesn't in this region.

What's the real difference between architectural shingles and standard three-tab shingles?

Architectural shingles are thicker and layered, which gives them better wind resistance and a longer lifespan, typically 25-30 years versus 20-25 for standard three-tab. For an area that sees regular wind-driven rain, that added thickness also does a better job shedding water at the shingle edges.

Do algae-resistant shingles actually help with moss in a climate like this?

Algae-resistant shingles use copper-infused granules that make it harder for algae and moss to establish themselves, which does reduce buildup over time compared to standard granules. They don't eliminate the need for occasional moss removal on heavily shaded roof sections, but they meaningfully slow it down.

Is it worth replacing a roof before it's actively leaking?

If you're seeing heavy granule loss, widespread moss, curling shingles, or the roof is past 20-25 years old, replacing it before a leak starts usually costs less than dealing with the water and structural damage a leak causes. An inspection can tell you where your roof actually stands rather than guessing from visible wear alone.

New Roof Installation in Aldergrove, BC

Roofing Built for Aldergrove's Weather, Not Just Any Weather

Aldergrove sits close enough to the coast, and close enough to us here in Lynden, that its roofs deal with a specific combination of punishment: salt-tinged air drifting in off the Strait of Georgia, long stretches of driving rain that comes in sideways during winter storms, and a moss season that can run eight months or more in shaded, north-facing sections of a roof. A roof that would hold up fine in a drier interior climate can fail early here if it wasn't chosen or installed with these conditions in mind. When we talk about a "new roof" for an Aldergrove home, we're not talking about a generic install — we're talking about a system of underlayment, ventilation, flashing, and fastening choices that account for what this specific stretch of the Pacific Northwest throws at a roof year after year.

We work both sides of the border out of Lynden, and Aldergrove is a regular part of our service area. That matters more than it might seem — a roofing crew that only occasionally works north of the line has to relearn local conditions on every job. We already know how moss builds up on the shaded slopes of homes tucked against tree lines, how wind-driven rain finds its way into poorly flashed valleys, and which details tend to get skipped on rush jobs. That local repetition is where a correct roof comes from.

What Aldergrove's Climate Actually Does to a Roof

Salt Air and Metal Components

Even well inland from open water, salt-laden air moving through Whatcom County and into the Fraser Valley accelerates corrosion on unprotected metal. Nails, flashing, and fasteners that aren't rated for coastal exposure can start rusting years before they should, which shows up as staining first and leaks later. We spec corrosion-resistant fasteners and flashing on every roof we install in this area, not as an upsell, but because it's the difference between hardware that lasts the life of the roof and hardware that becomes the first point of failure.

Driving Rain and Wind-Driven Moisture

Aldergrove gets its share of storms that push rain nearly horizontal for hours at a time. That kind of weather doesn't just test whether a roof sheds water downhill — it tests whether water can be forced sideways or upward under shingle edges, around vent pipes, and into valleys. A roof that looks fine in normal rain can still leak in a real windstorm if the underlayment and flashing details weren't built for wind-driven moisture specifically.

Moss, Shade, and Slow-Motion Damage

Moss doesn't just look bad — it holds moisture against the roof surface long after the rest of the roof has dried, which softens shingles, breaks down granule coating, and can lift edges enough for water to get underneath. Homes with mature trees, north-facing slopes, or roofs that stay shaded most of the day are especially prone to heavy moss growth. A correct roof install accounts for this with material choices and slope details that resist moss buildup, plus guidance on trimming back overhanging branches after the job is done.

Signs an Aldergrove Roof Needs Full Replacement, Not a Patch

Granules collecting in gutters or at the base of downspouts, especially after a heavy rain
Shingles that are curling, cupping, or visibly brittle when you look up from the ground
Moss coverage across large sections rather than isolated patches
Daylight visible through the roof deck from inside the attic
Repeated leaks in different spots after the roof is 20+ years old
Sagging rooflines or soft spots when walked, which can indicate deck rot
Flashing around chimneys, skylights, or vents that's rusted, lifted, or missing sealant

One or two of these on their own might mean a repair is enough. Several at once, especially on an older roof, usually means the underlying materials have reached the end of their useful life and a patch would just be a short-term delay.

What a Correct Roof Replacement Actually Involves

A roof is a system, and skipping any layer of it undermines the rest. Here's what we consider non-negotiable on every full replacement:

Tear-Off and Deck Inspection

We remove the old roofing down to the deck rather than layering over it. This lets us actually see the plywood or OSB underneath, which is the only way to catch rot or soft spots before they become a bigger problem hidden under a brand-new roof.

Underlayment

Given how much wind-driven rain this area sees, underlayment isn't a place to cut corners. We use synthetic or ice-and-water underlayment in vulnerable areas — eaves, valleys, and around penetrations — to give the deck a second line of defense if wind ever pushes water past the shingles themselves.

Flashing at Every Transition

Chimneys, skylights, sidewalls, and valleys are where the majority of roof leaks actually start — not in the open field of shingles. We install new flashing at every one of these transitions rather than reusing old flashing, because flashing is cheap compared to the water damage a failed piece can cause.

Ventilation

A roof that can't breathe traps moisture in the attic, which shortens the life of the decking and the shingles from underneath. We check and correct intake and exhaust ventilation as part of every replacement, not as a separate add-on.

Fastening and Wind Rating

Proper nail placement and count, matched to the manufacturer's wind-rating requirements, is what keeps a roof intact during the kind of storm Aldergrove sees a few times a winter. This is also one of the most commonly rushed steps on lower-quality installs.

Comparing Common Roofing Options for This Climate

Material	How It Handles Moss & Moisture	Typical Lifespan	Considerations for Aldergrove
Standard asphalt shingles	Moderate — needs periodic moss treatment	20-25 years	Solid, cost-effective choice; algae-resistant granules recommended for this climate
Architectural (laminate) shingles	Good — thicker profile sheds water better	25-30 years	Better wind resistance for driving-rain storms; our most common recommendation here
Metal roofing	Excellent — moss struggles to hold on smooth metal	40-50+ years	Higher upfront cost; needs coastal-rated fasteners and coatings to resist salt-air corrosion
Cedar shake	Poor without diligent maintenance	20-30 years with upkeep	Attractive but demands regular moss treatment and inspection; higher maintenance burden in this climate

We'll talk through these trade-offs honestly during an estimate. There's no single "best" material for every home — it depends on your roof's slope, shade exposure, budget, and how much ongoing maintenance you want to take on.

Our Process, Start to Finish

On-site assessment — We inspect the existing roof, deck condition, ventilation, and any problem areas like valleys or chimney flashing, and take real measurements rather than estimating from the ground.
Written estimate — You get a clear breakdown of materials, scope, and cost before any work starts. No vague allowances.
Scheduling around weather — Given how much rain this region gets, we plan tear-off and installation around forecast windows so your home isn't left exposed longer than necessary.
Tear-off and deck repair — Old roofing comes off, the deck is inspected, and any rotted or soft sections are replaced before anything new goes on.
Underlayment, flashing, and shingle installation — Installed in the order and manner that manufacturer specifications and local conditions require, not shortcuts.
Final walkthrough — We review the finished roof with you, including gutters, ventilation, and any cleanup, before calling the job done.

Why It Matters That We Already Work in Aldergrove

A crew that regularly works Aldergrove and the surrounding Lynden area isn't guessing at what this climate requires — we've already seen which flashing details fail first in wind-driven rain, which roof orientations grow moss fastest, and which fastener grades hold up against salt air over a decade of exposure. That kind of experience shows up in the small decisions on a job: where to add extra underlayment, how much ventilation a particular attic actually needs, whether a shaded valley needs a wider ice-and-water membrane than the plans call for. Those decisions are hard to get right from a manual alone — they come from doing the work here, repeatedly, and paying attention to what holds up.

Maintaining Your Roof After Installation

A new roof, properly installed, should need very little from you — but a few habits go a long way in this climate:

Keep gutters clear so water isn't backing up under the roof edge during heavy rain
Trim back tree limbs that overhang the roof to reduce shade and debris buildup
Have moss treated or removed before it spreads across large sections, rather than after
Schedule a visual inspection after major windstorms to check for lifted or displaced shingles
Address any small leak signs — water stains, musty attic smell — right away rather than waiting

Get a Straight Answer on Your Roof

If you're not sure whether your Aldergrove home needs a full replacement or just a repair, we're glad to take a look and give you an honest read — no pressure, no inflated urgency. Use the form below to request a free estimate, and we'll walk the roof, explain what we find, and lay out your options in plain terms.