What sets the height of a composite gate

A gate in this system is built the same way as a fence panel: composite boards stacked into an aluminum frame. Each board adds roughly half a foot, so the height is set by how many boards go in rather than by cutting anything down. That’s why a 6 ft gate and a 9 ft gate use the same parts list — just a different count and a different post.

The post is the part that changes with height, and it’s the part people get wrong. A taller gate is heavier, catches more wind, and puts more load on the hinge side. Reusing a short post on a tall gate is the most common reason a gate that looked fine in June is dragging on the latch by February.

Post lengths

Those are post lengths, not gate heights. Part of the post goes below grade, so the finished gate is shorter than the post it hangs on — how much shorter depends on your soil and footing depth. If you’re ordering supply-only and calculating footings, work from the metric figures. The imperial equivalents above are rounded, and on the 2.4 m and 2.7 m posts the common “8 ft” and “9 ft” labels run about an inch and a half over the real length.

Height is the easy part. Width is where gates fail.

Most people asking about a tall gate are really asking about a wide one — a lane access, a driveway, somewhere a vehicle or a trailer has to get through. Those are different problems.

Height mostly costs you material and a longer post. Width costs you leverage. Every extra inch of width multiplies the twisting force on the hinge side, which is why a wide gate sags long before a tall one does.

Our composite gates run up to 4 ft wide per leaf. Wider openings get covered by two gates rather than one oversized one, where the site allows it — that’s a decision made from the photos, not a size you pick off a list. Send the clear opening width and we’ll tell you what it takes, including when the answer is that this isn’t the right system for your opening.

Where taller gates actually get used

• Lane and rear-yard access — matching a tall boundary fence so the gate doesn’t read as a gap in the line
• Backing onto roads or raised neighbouring decks — the same reason the fence went taller in the first place
• Strata and townhouse sites — walkway and service gates that have to match a taller perimeter across several buildings
• Commercial screening — yards and service areas where the gate is part of the sightline from the street

If the fence itself is going taller too, the same board and post system covers both — see composite panels in different heights so the gate and the run stay on one system.

What to send for a quote

1. Clear opening width — post face to post face, not the old gate
2. Target height — or the height of the fence it has to match
3. Photos of both posts — hinge side and latch side, including the base
4. The ground — one photo from the side so any slope through the swing is visible
5. Swing direction and latch preference — lockable or basic latch

Photos of the posts matter more than precise measurements at this stage. A tall gate on a post that’s already leaning inherits the problem, and that’s something we can see before anyone comes out.

Common questions

How tall can a composite gate be?
Height is set by board count and post length, with posts available from 1.95 m up to 3.05 m and an 11 ft option on request. The practical limit is usually the post and footing, not the boards.

Does a taller gate sag more?
Not on its own — width is what causes sag. A tall narrow gate is easier to keep square than a short wide one. Height matters because of weight and wind load, which is why the post and footing get sized up rather than reused.

Can the gate match a fence we already have?
If it’s our system, yes — same boards, same colour, same frame. If it’s someone else’s composite, send a photo of the board face and we’ll tell you honestly whether it will match or just look close.

Can I order gates supply-only?
Yes. Supply-only orders go out to contractors and experienced DIY builders. Work from the metric post lengths when you’re calculating footings.

Do I need a permit for a tall gate?
It depends on the height and where it sits. In most Metro Vancouver municipalities height is measured from grade at the fence line, and front yards, corner lots and lane frontages have their own limits. Start with max fence height in Vancouver and confirm with your municipality or strata before ordering.

Send your opening width and a few photos

Give us the clear opening, the target height and photos of both posts, and we’ll come back with the post length, board count and hardware for your site — not a range you’d have to renegotiate later.

Call (604) 500-3100 or text (778) 318-8578, or click Request For Quote above.