doors (Home Systems)

Doors

• What this is: how exterior and interior doors work, what causes them to fail, how to keep them watertight and secure, and when to call a pro — for any BC home including strata units.
• Not: garage doors (separate component); locks and deadbolts beyond the strike plate (see locks-keys (Home Systems)); caulking around the frame (see caulking-seals (Home Systems)); window maintenance (see windows (Home Systems)).
• Figures: 2025–26 Metro Vancouver estimates — get your own quotes.

Bottom line

The rule (tripwire)

• If multiple doors in your home suddenly start sticking in the same pattern → stop and look for companion signs (new wall cracks, uneven floors) before adjusting anything. A single sticking door is usually just hinge wear or humidity; multiple doors sticking together can be a foundation movement signal. Cross-link: foundation (Home Systems).¹
• If daylight, cold air, or water is entering around an exterior door → reseal it this season. A drafty or leaking exterior door is simultaneously a comfort problem, an energy bill problem, and a rot-starter at the sill and frame.
• If your exterior door is hollow-core → it is a security and envelope liability. Exterior doors should be solid-core (wood), steel, or fiberglass. A hollow-core door combined with a standard 25mm strike plate can be kicked open with a single blow.²

Recurring upkeep

• Weatherstripping: inspect every autumn, replace when you feel air or see light. Outer doors compress their seals daily — most weatherstripping needs replacement every 3–7 years depending on material and sun exposure.
• Door sweep: check annually; replace when it no longer brushes the threshold. The sweep is the last line against drafts, insects, and water at the base.
• Patio / sliding door track and rollers: clean and lubricate every 6–12 months. A gritty track destroys rollers fast; a clean, lubricated track extends them for years.
• Wood door and frame: inspect for paint/finish failure and rot annually. Metro Vancouver’s wet winters make this the highest-maintenance door type — plan refinishing every 1–3 years.

One-time setup

• Upgrade your entry-door strike plate to a reinforced plate with 3-inch screws if you haven’t already. This is a $15–$30, 20-minute fix that multiplies kick-in resistance several-fold. Cross-link: locks-keys (Home Systems).²
• In a strata: find out in writing whether your unit-entry door is your responsibility or the strata’s before spending money on it. Under Standard Bylaw 8, exterior doors fronting on common property are the strata corporation’s responsibility — but many stratas have amended bylaws that shift maintenance to the owner.³⁴

Standing facts

• Like-for-like exterior door replacement in an existing opening generally does not require a City of Vancouver building permit, but adding sidelites, changing the opening size, or cutting a new opening does.⁵
• In a strata, Standard Bylaw 8 requires strata council approval before any alteration that affects common property — which may include the entry door.⁴

How it works — the one thing that matters

An exterior door does three jobs simultaneously: it seals the building envelope against air, water, and energy loss; it acts as a security barrier; and it provides a structurally sound, operable opening in what is often a load-bearing or structural wall.

The seal is the load-bearing mechanism — and it lives in three overlapping zones:

• The perimeter seal (weatherstripping): compressible strips along the door stop and head jamb that contact the door face when it closes. They keep air and driven rain from infiltrating around the door leaf.
• The base seal (door sweep + threshold): the door sweep attaches to the bottom of the door leaf; the threshold is the raised sill it bears against. Together they close the gap at the floor — the largest single infiltration point on most residential doors.⁶
• The frame-to-rough-opening seal (caulking + flashing): the exterior perimeter of the frame sealed to the wall cladding. This is what the weatherstripping depends on — a sealed frame with a failed perimeter caulk still leaks.

Why this matters: water that bypasses these three layers pools at the wood sill and bottom of the frame — exactly the location where rot begins. Rot at the sill and frame bottom is the dominant long-term failure mode on wood-framed exterior doors. On wood doors specifically, finish failure (paint cracking, stain fading) accelerates UV and moisture penetration into the door itself, which then warps, swells, and eventually delaminates. Steel doors are immune to rot but rust through if the finish fails. Fiberglass is immune to both.

So what: the entire maintenance regime for exterior doors is about keeping the three-zone seal intact and keeping water away from wood. Everything else — hinge adjustment, lock maintenance, patio door roller care — is secondary. → Exterior-Door-Weather-Seal-Is-the-Envelope-at-Floor-Level (Home Systems)

What goes wrong, and the warning signs

Watch for	What it means
Daylight visible around the door frame	Weatherstripping has compressed or failed — reseal now
Cold air infiltration at the base	Door sweep worn or missing; or threshold seal has failed
Water on the floor inside during rain	Active infiltration — frame seal and sill need inspection before rot starts
Paint bubbling or peeling at the bottom of a wood door or frame	Moisture is getting in — check the door sweep, threshold, and sill caulk immediately
Soft or spongy wood at the sill, frame base, or bottom rail	Active rot — the wood cannot be sealed back; it must be cut out and replaced
Door sticking or binding at one corner	Hinge screws loose, hinge worn, or seasonal wood swelling — usually fixable
Door sticking at multiple locations or multiple doors sticking together	Possible frame/structural movement — see Foundation note before adjusting
Door won’t latch without lifting the handle	Hinges have sagged; strike plate needs adjustment or hinges need new longer screws
Gaps visible at the top or latch side	Frame is racking or settling — confirm with a square before blaming the door
Patio door difficult to slide	Dirty/gritty track, worn rollers, or door dropped off the track
Patio door vibrating or rattling in wind	Weatherstripping at the interlock panel has failed; or rollers have dropped the door
Condensation between patio door glass panes	Sealed glass unit failure — door sash replacement, not a DIY repair

What actually fails (the load-bearing failures):

• Sill and frame rot — the dominant long-term failure on wood-framed exterior doors; starts invisibly under paint, discovered when the door stops closing properly or the probe test finds softness
• Weatherstripping compression failure — compressible seals lose their springback after 3–7 years and let air and driven rain through the perimeter
• Hinge wear and frame settlement — hinges with stripped screws are the most common cause of single-door sticking; foundation movement is rare but the high-stakes cause of multi-door sticking
• Patio door roller wear — rollers flatten and disintegrate in a dirty or dry track; the door then drops, binds, and eventually jams

When to replace vs repair

What you see	Do this
Weatherstripping worn, no rot	Repair (DIY) — peel-and-stick or press-in foam/rubber; $5–$20 in parts
Door sweep worn or missing	Repair (DIY) — screw-on sweep; $15–$40 in parts
Hinges loose, screws stripped	Repair (DIY) — longer screws or fill with toothpick + glue trick
Patio rollers worn, door hard to slide	Repair — roller replacement is owner-doable or low-cost pro job ($100–$220)7
Wood rot localized to sill or one rail, <30% of frame	Repair — carpenter cuts out rot, splices in new wood, repaints; $300–$8008
Wood rot extending into the structural rough-opening framing	Replace — rot into the king stud or header requires a contractor and possibly a permit
Steel door with rust through the skin	Replace — rust-through is irreversible; repairs hold temporarily at best
Door is hollow-core on an exterior opening	Replace — this is not a repair situation; it is an ongoing security and envelope liability
Door is 30+ years old, multiple seals failing, persistent drafts	Replace — the combination of aged weatherproofing, worn threshold, and possible settled frame makes like-for-like repair cost-ineffective
Single sticking point, no rot, hinges tight	Adjust — plane the high spot after confirming the frame is square
Multiple doors sticking, wall cracks, sloping floors	Call a structural engineer before touching the doors — adjusting doors masks the foundation signal

Verdict: weatherstripping, sweeps, and hinges are reversible low-cost repairs — just do them. A full exterior door replacement ($1,000–$3,500+ installed) is irreversible and exceeds $500, so it earns the full The Decision Lifecycle treatment; the key question is whether you’re replacing a failed door or upgrading a marginal one. Rot extending into structural framing crosses into pro + possible permit territory and should be assessed before committing. → Sticking-Door-That-Spreads-to-Multiple-Openings-Is-a-Foundation-Signal (Home Systems)

Typical cost (BC / Metro Vancouver)

Tier	What’s included	Range	Sources
DIY / parts only	Weatherstripping kit (EPDM/rubber, one door); door sweep; threshold seal; hinge screws	$15–$80 per door for seal kit + sweep	6910
Basic	Professional weatherstripping + sweep installation, single door; or patio door roller replacement (parts + labour)	$100–$350 per door	9107
Standard	Like-for-like exterior entry door replacement (steel or fiberglass, standard size, existing opening); supply + install + haul-away; no permit required for same-size opening	$1,000–$2,500 (steel or fiberglass) · $1,500–$3,500+ (wood)	1112 — indicative (limited sources)
Premium / upgrade	Full exterior door + sidelites; or patio/sliding door replacement (standard two-panel); or French door pair; includes hardware, weatherstripping, and installation	Patio door (two-panel): $1,500–$3,500 · French door pair: $2,000–$5,000 · Entry + sidelites: $2,500–$6,000+	11128

Metro Vancouver labour runs 10–25% above the BC average. A rot repair that requires cutting into the structural rough-opening framing will cost more than a door swap — get a written scope from a carpenter before proceeding. Permit costs for any opening modification: typically $150–$500 through the City of Vancouver.⁵ Get 2–3 written quotes.

Standard and Premium tier notes: pricing triangulated across a BC door company (Novin Doors, Burnaby-based) and general contractor cost guides for Metro Vancouver. Fiberglass and steel doors occupy a wide range depending on slab size, glass content, and hardware grade. Wood doors are at the high end due to finishing costs.

How to maintain it — the procedures

Procedure: Inspect and replace weatherstripping — annually (autumn)

Why: failed weatherstripping is the first step toward a drafty door and eventual sill rot. A once-a-year visual check catches it before winter.

You’ll need:

• A flashlight
• Replacement weatherstripping (EPDM rubber foam or V-strip; match the profile to what’s on the door — foam for compression stops, V-strip or door stop gasket for the door-face seal)
• Utility knife or scissors
• Clean cloth

Steps:

1. Close the exterior door and stand inside with the lights off during daytime. MUST check all four sides — use your hand to feel for cold air movement while someone else holds a lit incense stick or thin piece of tissue at the frame exterior.
2. Inspect the existing weatherstripping: run your finger along the door stop and head jamb. Look for torn sections, flat-compressed foam that no longer springs back, or gaps where the material has peeled away.
3. If worn: remove the old weatherstripping by peeling or pulling it off (adhesive-backed) or unscrewing the kerf-type retainer.
4. Cut new weatherstripping to length. MUST measure twice — weatherstripping cut short leaves a gap; cut long can prevent the door from closing.
5. Press adhesive-backed type into the door stop groove. For kerf-type (the small channel in the door stop), press the fin into the channel and use a roller or coin to seat it.
6. Close the door and re-check for air movement.

Done when: the door closes firmly with no cold-air infiltration and the weatherstripping contacts the door face along its full length.

Stop and call a pro if:

• You find rot at the door stop or head jamb (soft wood under the weatherstripping)
• The door is not making full contact with the stop on one side — this indicates frame racking, not weatherstripping failure

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Procedure: Replace the door sweep — annually (autumn) or when worn

Why: the door sweep seals the largest single air gap on most exterior doors. A worn or missing sweep lets in cold air, insects, water, and noise.

You’ll need:

• Replacement door sweep (screw-on type is easiest; match the door bottom width — most exterior doors are 36” wide)
• Screwdriver or drill
• Utility knife or tin snips to cut to length

Steps:

1. Open the door. Look at the bottom: is the existing sweep present? Does the rubber or brush element drag on the threshold, or has it lifted?
2. Remove the old sweep by unscrewing it from the door face or bottom.
3. Hold the new sweep against the door bottom. MUST set the height so the rubber or brush just contacts the threshold when the door is closed — too high = gap; too low = the sweep drags and wears fast.
4. Mark the screw hole locations; pilot-drill if the door is solid wood to prevent splitting.
5. Screw the sweep to the door bottom.
6. Close the door and check: the sweep should just brush the threshold, not compress heavily.

Done when: the sweep contacts the threshold along its full width with no visible gaps and the door still closes easily.

Stop and call a pro if:

• The threshold itself is rotted or cracked (the sweep sits on top of it — a rotted threshold needs replacement first)
• The door bottom is rotted (the sweep screws will not hold in soft wood)

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Procedure: Patio / sliding door track cleaning and lubrication — every 6–12 months

Why: the bottom track collects dirt, grit, and hair. That debris acts as an abrasive between the rollers and the track, wearing both down and eventually causing the door to drag or jump the track.

You’ll need:

• Vacuum with crevice attachment
• Old toothbrush or stiff paintbrush
• Spray silicone lubricant (NOT WD-40 — it attracts dust and degrades the track coating)
• Damp cloth

Steps:

1. Slide the door open fully. Vacuum out the track channel — remove all visible debris.
2. Scrub the track with the brush to dislodge packed-in grit.
3. Wipe the track clean with the damp cloth.
4. Spray a light coat of silicone lubricant along the track. Wipe off any excess.
5. Slide the door back and forth several times to distribute the lubricant.
6. Test operation: the door should slide smoothly with moderate resistance (not effortless, not heavy).

Done when: the door slides smoothly without scraping, sticking, or vibrating.

Stop and call a pro if:

• The door jumps the track
• The roller height adjuster screws at the bottom of the door panel are frozen or stripped (adjusting dropped rollers requires removing the door panel)
• The track itself is bent or damaged

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Procedure: Hinge maintenance and adjustment — as needed when sticking

Why: loose hinge screws are the most common cause of single-door sticking. A door that sags on its hinge side will bind at the top-latch corner and not latch properly.

You’ll need:

• Screwdriver (check whether Phillips or square-drive)
• Longer replacement screws (3-inch for hinges; 3-inch for the strike plate)
• Optional: wooden toothpicks + carpenter’s glue (for stripped holes)

Steps:

1. Open the door and examine the hinges. Tighten all visible screws. If they spin without biting, the holes are stripped.
2. For stripped holes: remove the screw, coat several toothpicks with wood glue, pack them into the hole, snap them off flush, let dry 30 minutes, then re-drive the screw. For exterior hinges with long-term rot exposure, a longer 3-inch screw into the stud framing is more reliable.
3. MUST check the door again for fit after tightening all hinges. If it still sticks at the top corner, the door may need minor planing or the frame may be racked.
4. If the door won’t latch: inspect the strike plate. The latch bolt may no longer align. Adjust the strike plate position by up to 3mm by elongating the mortise with a sharp chisel, or replace with a longer-throw deadbolt and reinforced strike plate.

Done when: the door closes smoothly, latches without lifting the handle, and the gap around the frame is consistent.

Stop and call a pro if:

• The door sticks in multiple locations or the frame appears to be out of square (check with a level on the hinge jamb)
• You see new diagonal cracks in the drywall near the top corner of the door frame — this is a structural signal, not a hinge problem

Maintenance calendar:

• Annually (each autumn before rainy season): inspect weatherstripping for compression failure and air infiltration; inspect door sweep; check sill and frame base for paint failure or soft wood; clean and lubricate patio door track.
• Every 1–3 years: replace weatherstripping if compressed or torn; replace door sweep if dragging or stiff.
• Every 1–3 years (wood doors): inspect finish — repaint or re-stain if peeling, cracking, or bare wood is visible. Metro Vancouver rain means you cannot defer this.
• As needed: tighten hinge screws when the door starts to sag or bind. Replace patio door rollers when the door becomes hard to slide after a track cleaning.
• On move-in: upgrade the entry door strike plate to a reinforced plate with 3-inch screws if not already done.

Strata reality

Unit-entry door: often common property — confirm before touching.

Under BC’s Strata Property Act Schedule of Standard Bylaws (Bylaw 8(d)), the strata corporation is required to maintain “doors, windows and skylights on the exterior of a building or that front on the common property” — regardless of how often the repair is needed.³ A unit-entry door that faces a common hallway almost always meets this definition.

However, many BC stratas have amended their bylaws to shift ongoing maintenance of those doors to the unit owner, while keeping structural or major work with the strata. The only authoritative answer is your strata’s registered bylaws combined with the strata plan showing where the lot boundary falls relative to the door frame.⁴

In practice:

• Minor maintenance (weatherstripping, sweep, hinges, painting the interior face): often allowed as owner upkeep even when the door is technically common property — but confirm before starting
• Replacing the door slab or frame: almost certainly requires strata council approval under Standard Bylaw 8 (alterations to common property), regardless of who pays
• Security upgrades (strike plate, deadbolt): may require strata approval if they affect the door’s appearance on the common hallway side — check before drilling

Patio/balcony doors: often designated as limited common property under your strata’s bylaws. The strata corporation’s duty to repair limited common property is restricted to repairs that ordinarily occur less than once a year — meaning your strata may be responsible for structural or seal failure but not annual weatherstripping.³

The SPA provision: s.72 of the SPA defines common property; Standard Bylaw 8 defines the strata corporation’s and owner’s maintenance split for strata lot components and limited common property. Courts have held that a door on a strata lot boundary is common property if it sits on the exterior side of the lot midpoint — which a unit-entry door usually does.⁴

Relevant SPA provisions:

• SPA s.72 — what is common property
• Standard Bylaw 2 — owner’s duty to maintain strata lot
• Standard Bylaw 8 — strata corporation’s duty to maintain common property and exterior building components, including doors

→ Strata-Entry-Door-Is-Common-Property-Under-Standard-Bylaw-8 (Home Systems)

When you hire someone

Ask:

• Are you a licensed carpenter / general contractor with liability insurance? (For any frame or structural work, ask for proof.)
• For a new exterior door installation: will you handle the building permit if the opening changes size?
• What is the door material, brand, and warranty? (Ask for the product spec sheet — fiberglass and steel doors vary widely in quality.)
• Does the installation include new weatherstripping and threshold seal, or just the door slab?
• Is haul-away of the old door included?
• Is caulking of the exterior perimeter included? (It should be — if not, you have an unfinished envelope.)
• For patio door replacement: is the door system supplied and installed, or supply-only?

Verify the work:

• The door closes and latches without force
• No visible gaps around the frame when the door is closed — use a flashlight from inside on a bright day
• Weatherstripping contacts the door face on all four sides
• Door sweep contacts the threshold along its full width
• Exterior perimeter is caulked (run your finger around the outside frame)
• If the opening changed size: confirm a building permit was pulled and the work will pass inspection

Who to call

• Carpenter / door installer (residential) → vendor-roster (Home Systems). Fill: company name, phone, notes on strata experience and whether they supply and install or install-only. For frame rot and structural rough-opening work, look for someone who can distinguish a cosmetic repair from a structural one.
• Patio door / sliding door specialist → vendor-roster (Home Systems). Fill: Sunify Group (604-727-2615) and Express Door Repair (778-321-7791) are Vancouver-based sliding door specialists; confirm strata-friendly (insurance + adjuster process).
• Strata manager → Strata MOC. Fill: confirmation of who is responsible for the entry door (strata or owner) per registered bylaws; approval process for any door replacement.
• Insurer / broker → insurance-warranties (Home Systems). Fill: confirm whether water damage originating from a door seal failure (window sill leak, threshold overflow) is covered, and whether the strata deductible applies.

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Sources

Idea Compass

North: Where this comes from

• Structural (Home Systems) — parent system
• Exterior-Door-Weather-Seal-Is-the-Envelope-at-Floor-Level (Home Systems) — the three-zone seal mechanism that defines what maintenance does
• The Decision Lifecycle — the repair-vs-replace framing

East: Tensions / failure

• Sticking-Door-That-Spreads-to-Multiple-Openings-Is-a-Foundation-Signal (Home Systems) — the failure mode that looks like a door problem but isn’t
• Strata-Entry-Door-Is-Common-Property-Under-Standard-Bylaw-8 (Home Systems) — who pays for what in a strata
• foundation (Home Systems) — the upstream cause of multi-door sticking

South: Where this leads

• locks-keys (Home Systems) — the security layer that rides on top of door condition
• caulking-seals (Home Systems) — the exterior perimeter seal the door frame depends on
• vendor-roster (Home Systems) — the carpenter/door specialist named-resource card

West: What’s similar

• windows (Home Systems) — same three-zone envelope logic; same strata common-property question
• Patio-Sliding-Door-Roller-and-Track-Are-the-Whole-Game (Home Systems) — the patio-door-specific failure mode

Footnotes

1. Atlas Foundation Inc. — sticking doors and foundation trouble: multiple doors sticking in the same pattern, combined with wall cracks and sloping floors, indicates foundation movement rather than normal hinge wear; single door sticking is usually seasonal or hardware — https://www.atlasfoundationinc.com/sticking-doors-misaligned-windows-everyday-signs-of-foundation-trouble/ ↩

2. Security Man Inc. — door security devices guide 2026: standard strike plate screws (1/2”) allow kick-in with 100–150 lbs force; replacing with 3-inch screws into stud + reinforcement plate raises threshold to 800+ lbs; total hardware cost under $30 — https://securitymaninc.com/blogs/security/the-complete-guide-to-door-security-devices-every-type-explained ↩ ↩²

3. BC Laws, the governing statute — Strata Property Act, Schedule of Standard Bylaws, Bylaw 8 — strata corporation’s duty to repair doors, windows, and skylights on the exterior of a building or fronting on common property — https://www.bclaws.gov.bc.ca/civix/document/id/complete/statreg/98043_18 ↩ ↩² ↩³

4. Clicklaw Wikibooks (Law Students Legal Advice Program), a BC legal aid resource — Common Property and Common Assets (22:V): doors on the exterior side of the strata lot boundary are common property; SPA s.72; Standard Bylaw 8; courts have held exterior-facing unit-entry doors to be common property — https://wiki.clicklaw.bc.ca/index.php/Common_Property_and_Common_Assets_(22:V) ↩ ↩² ↩³ ↩⁴

5. AAG Services Construction, a Vancouver renovation contractor — Vancouver permit guide 2025: window/door replacement that changes size or location requires permit; like-for-like in same opening generally does not — https://aagservicesconstruction.ca/permit-requirements-for-home-renovations-in-vancouver-2025-guide/ ↩ ↩²

6. US Department of Energy, Energy Saver — weatherstripping types, when to replace, performance by material — https://www.energy.gov/energysaver/weatherstripping ↩ ↩²

7. 24hr Sliding Door Repair, a US sliding-door repair specialist — roller replacement parts $25–$40; professional installation $75–$140; total $100–$220; track cleaning and lubrication included in service — https://www.24hr-sliding-door-repair.com/blog/how-much-to-replace-sliding-door-rollers/ ↩ ↩²

8. HomeAdvisor / Angi, a US cost-data site — door frame repair $75–$220; exterior door frame replacement $300–$1,000; dry rot repair national average starting $592–$1,112; Metro Vancouver labour rates run 25–40% above national US average per local contractor references — flagged as US-origin indicative figures, not BC-triangulated — https://www.homeadvisor.com/cost/doors-and-windows/repair-a-door/ ↩ ↩²

9. Fixr.com, a cost-data site — national average weatherstripping install $200–$600; per-door professional install $35–$90; door sweep install $75–$150; labour $50–$100/hr — https://www.fixr.com/costs/weatherstripping ↩ ↩²

10. HomeGuide, a cost-aggregator site — weatherstripping install per door $35–$90 DIY materials $15–$60; door sweep $15–$40 in parts; threshold upgrade $40–$150; US figures, indicative for Canada — https://homeguide.com/costs/weather-stripping-installation-cost ↩ ↩²

11. Novin Doors, a Burnaby BC door company — exterior entry door installed cost in Vancouver/Burnaby: steel CAD $500–$1,500 (unit), fiberglass CAD $800–$1,800 (unit), installed standard $1,000–$1,800, mid-range $1,800–$2,500; labour CAD $60–$110/hr — https://novindoors.ca/exterior-door-installation-cost/ ↩ ↩²

12. Novin Doors, a Burnaby BC door company — patio door replacement cost Canada: sliding patio door $1,500–$2,500 installed; French door pair $2,000–$5,000; professional installation $500–$1,500 depending on complexity; permit costs $50–$200 — https://novindoors.ca/patio-door-replacement-cost/ ↩ ↩²