Industry: warehousing and logistics

Warehouse Roofing for Edmonton Distribution Buildings

Big roofs, tight dock schedules and inventory you can't move. We plan the roof around the freight.

The roof behind the operation

Warehouse roofing in Edmonton is a problem of scale. A single distribution building can carry several hundred thousand square feet of low-slope membrane, and almost none of it is seen from the ground. A small split at a seam near the back wall can run for months before water shows up on a pallet, and by then the insulation under it is wet across a far bigger area than the leak itself.

Rain Roofing works on warehouses, cross-docks and distribution centres across the Edmonton region, from the Hwy 16 corridor in the northwest to Nisku and Acheson. The goal is simple: keep the roof dry, keep the docks open, and give the facility manager a clear record of what is up there.

Zoned, phased work

Active docks and high-value inventory are never under open roof.

Recover where it makes sense

Moisture surveys show whether a recover can replace a full tear-off.

Protection around units

Walkway pads and proper curb flashings where service traffic does the most damage.

Where large warehouse roofs fail

Big roofs rarely fail in the open field. They fail at the details, and on a warehouse those details are predictable:

Seams and laps across long runs of membrane, where freeze-thaw cycles work at every small defect.
Rooftop units and curbs, where service techs walk, drop tools and lay panels on the membrane.
Drains and scuppers on wide, nearly flat decks, where spring melt ponds by day and freezes again at night.
Skylights and smoke hatches, common on older warehouses and often poorly flashed.
Perimeter edge metal and parapets, where wind uplift and drifting snow concentrate.

Snow, drifts and wide roofs

Wide roofs collect drifts against higher walls, parapets and rooftop units, and that weight can sit for weeks in a normal Edmonton winter. Drift zones are where we find crushed insulation, split membrane and drains sealed under ice.

On a building this size, a few hours of targeted snow clearing at the drift areas is often worth more than clearing the whole roof. Our snow removal crews work with plastic tools and leave a protective layer on the membrane, so the clearing doesn't cause the next leak.

Aerial view of a prairie industrial park

Roof systems that suit distribution buildings

The right system depends on the deck, the existing insulation, the budget and how long the owner plans to hold the building.

TPO: a light-coloured single-ply that goes down quickly over large areas, with heat-welded seams and manufacturer NDL warranties of up to 25 to 30 years on some systems.
SBS 2-ply: the regional workhorse, tough in the cold and resistant to hail and foot traffic around equipment.
EPDM: a proven rubber membrane for large, simple roof areas with few penetrations.
Recover systems: where an infrared or moisture survey shows the existing insulation is dry, a recover can avoid the cost and disruption of a full tear-off.

Working around docks, racking and inventory

A warehouse can't shut down for a re-roof. We break the roof into zones and sequence them so active dock doors, the most valuable inventory and the busiest aisles are never under open roof.

Before we start, we walk the floor with your operations lead to map racking, sprinkler mains and anything that can't get wet. Material is craned up outside peak dock hours where we can, and staging stays clear of truck courts and fire lanes. Each zone is watertight at the end of every shift, and your site contact gets daily progress updates.

For roofs that still have years left, a spring and fall inspection program catches blocked drains, open seams and mechanical damage before freight gets wet.

Safety and paperwork for your files

Crews on a large roof work far from the edge and right beside it in the same day. We set up guardrails, warning lines or fall arrest to Alberta OHS requirements and keep a site-specific hazard assessment on site for every job. Rain is COR-certified and carries WCB-Alberta coverage, with clearance letters on request.

At closeout you get a package your insurer and the next property manager can use: photos, a roof plan, product data and warranty documents.

Questions

What facility managers ask us

Ask your own

Can you re-roof our warehouse without closing the docks?

In most cases, yes. We phase the work by zone and agree the sequence with your operations team before we start. Docks under an active zone stay open, and crane lifts are scheduled outside your busiest hours where possible.

How do we know if a recover is possible instead of a tear-off?

It depends on the existing insulation. If an infrared or moisture survey shows it is dry and the deck is sound, a recover is often an option, and it is usually faster and less disruptive. Wet insulation has to come out first.

What does a warehouse roof warranty usually cover?

There are usually two or three layers: the manufacturer's material or NDL system warranty, the contractor's workmanship warranty and, on some projects, a third-party ARCA warranty. Rain issues a 10-year workmanship warranty on full replacements and explains each layer in writing before you sign.

Our rooftop units keep causing leaks. What can be done?

Most leaks around units come from curb flashings, condensate lines and service traffic. We reflash curbs, add crickets on the uphill side to move water around them, and install walkway pads on service routes.

How much snow is too much on a warehouse roof?

There is no single number. It depends on the building's design and the type of snow. Drifts against parapets and units are the usual concern. If you see deflection, new leaks or doors that start to stick, call a structural engineer and call us.