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Deck Railing Installation in Ottawa

Deck Builders Experts installs wood, aluminum, glass and cable railings across Ottawa, built to the heights and spacings the Ontario Building Code actually requires.

Railing is where more decks fail inspection than anywhere else, and almost always on four numbers. Get the guard height, the sphere rule, the handrail height and the handrail shape right and the rest is a question of what you want to look at.
1,070 mm guard, or 900 mm within 1.8 m of the ground
No opening in a required guard passes a 100 mm sphere
Graspable handrail on exterior stairs over three risers

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The numbers, in plain terms

Four Numbers Every Ottawa Guard Has to Hit

Guard height on a residential deck is 1,070 mm, which is 42 inches. A relaxation allows 900 mm, or 36 inches, while the walking surface is not more than 1.8 m above the finished ground, so the taller guard applies as soon as the deck clears that height. That is the honest reason a raised deck railing costs more than a ground-level one: it is a code threshold, not an upsell. Next, no opening anywhere in a required guard may allow a 100 mm sphere to pass through, and that applies to the stair rake exactly as it does to the level sections. It is the rule that sets baluster spacing, and it is why a preference for wider spacing cannot be accommodated. Then the stairs. More than three risers on an exterior stair means a handrail, mounted 865 mm to 965 mm above the stair nosing. And finally the one that catches good decks out: a wide flat guard cap is rarely graspable enough to serve as that handrail.

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Where Railings Fail Inspection

These are the five findings that turn a finished deck into a return visit.

A top rail doing a handrail's job

A wide, flat top rail on a guard is not automatically graspable. On a stair that needs a handrail, a separate graspable rail usually has to be added, and that is a detail that gets missed constantly.

The wrong guard height for the elevation

A 900 mm guard on a deck that is more than 1.8 m above grade is the most expensive mistake on this list, because fixing it means new posts, not new balusters.

Spacing that opens up on the stair rake

Balusters that pass the 100 mm sphere test on the level often fail it on the angled stair section, because the geometry changes. Stair guards get checked separately.

Guard posts bolted through decking only

A guard post has to be connected to the frame, not to the deck boards. This is the reason so many railings wobble within a couple of years.

Handrail height measured off the wrong thing

The 865 mm to 965 mm handrail height is measured from the stair nosing, not from the deck surface or the bottom of the stringer.

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Picking a Railing Material

What each one is genuinely good and bad at in an Ottawa backyard.

Wood and cedar

Lowest cost and it matches a wood deck exactly. It shares the deck's refinishing cycle, and wood balusters are the ones most likely to loosen over years of freeze and thaw, so the connections matter.

Aluminum

Powder-coated pickets with no refinishing, slim sightlines and it does not swell or shrink with the seasons. It is the common upgrade from wood, and the one that most reduces long-term maintenance.

Glass and cable

Both are chosen to keep a view. Glass shows every fingerprint and every rain spot and needs regular cleaning. Cable needs its tension checked and its terminations are the part that has to be detailed properly.

Railing Cost by Material

Published Ottawa figures put railing between roughly $25 and $250 per linear foot, with material choice driving almost all of the spread. Your written quote sets the actual price.

Wood Picket

$25 – $60 per linear foot

  • The least expensive guard that meets the Code
  • Paint or stain on the same cycle as the deck
  • Stair handrail included where an exterior run exceeds three risers
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Most popular

Aluminum

$80 – $150 per linear foot

  • No refinishing cycle at all
  • Thin pickets give up less of the view than wood
  • Corner and stair posts add labour beyond the straight run
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Glass or Cable

$100 – $250 per linear foot

  • Keeps the view, at the top of the published range
  • Sections above 1.8 m need the 1,070 mm guard height
  • Mixing materials by section is possible and often cheaper
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Our Process

From Measure to Mounted Guard

1

Measure the deck and the drop

Linear feet of guard, number of stair runs, and the height of each walking surface above the finished ground, which is what sets 900 mm against 1,070 mm.

2

Check what the posts are fixed to

On a replacement we open up the connection and look. A post bolted to decking instead of to the rim joist is the reason the old railing moved.

3

Set posts into the frame

Guard posts through-bolted to the frame with blocking where it is needed, spaced so the infill spans correctly for the material you chose.

4

Infill, handrails and a push test

Balusters, panels or cable to the 100 mm sphere rule, a graspable handrail at 865 mm to 965 mm off the nosing, then we lean on every section before we leave.

Railing Clients

Feedback shared directly with us by clients.

5/5

Our new deck has completely transformed our backyard. The workmanship is excellent, the railings look great, and the entire structure feels solid. Thank you for the professional service.

Robert M.

Ottawa

Direct Client

5/5

Excellent experience from the initial estimate to the final inspection. The builders paid close attention to every detail and kept us updated throughout the project. I would recommend them to other Ottawa homeowners.

Karen L.

Ottawa

Direct Client

5/5

We hired Deck Builders Experts to replace our old wooden deck. They explained our material options clearly and helped us choose a design that suited our home and budget. We are very happy with the result.

Michelle T.

Ottawa

Direct Client

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Deck Railing Questions

How wide can the gaps between my balusters be?

No opening in a required guard may allow a 100 mm sphere, about four inches, to pass through. That applies to the level sections and to the angled stair sections alike. It is the rule that decides baluster spacing, and it is not adjustable, so if you want a more open look the answer is a different infill material like glass or cable rather than wider gaps.

Does the top of my guard count as the handrail on the stairs?

Not automatically, and this is the detail that fails otherwise good decks. Under current standards the top rail of a guard does not necessarily qualify as a graspable handrail, because a wide flat cap is not something a hand can close around. On a stair that needs a handrail we mount a separate graspable rail at the correct height rather than assuming the guard covers it.

My stairs have three steps. Do I need a handrail?

A handrail is required once an exterior stair has more than three risers. At exactly three you are under the threshold. Plenty of homeowners add one anyway on a stair used by kids or by someone unsteady, and on a short run it is inexpensive to include while the crew is already there.

Can I replace just the railing and keep the deck?

Frequently, yes, and it is one of the most cost-effective upgrades on an older deck. What we check first is what the guard posts are fixed to. If they were through-bolted to the rim joist and that framing is sound, a new railing goes straight on. If the posts were only screwed to decking, that connection gets rebuilt as part of the job, because it is why the old one moved.

Is glass railing a problem through an Ottawa winter?

The glass itself handles the cold. What people underestimate is the cleaning. Rain spots, pollen, road dust and the salt haze that gets everywhere in this city all show on glass, and a glass guard only looks right when it is washed. If nobody in the house is going to wash it, aluminum will look better on average across a year.

Why does my railing wobble when I lean on it?

Almost always the post connection. A guard post fastened into deck boards rather than through the rim joist or a blocked frame member has very little resistance to being pushed sideways, and years of freeze and thaw work it looser. Tightening the visible screws does not fix it. The post has to be reconnected to the structure underneath.

Need a Railing That Passes Inspection?

Free written quotes on wood, aluminum, glass and cable railings across Ottawa and the surrounding communities.

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