Metal Roofing in Concrete for Snow, Needles and Long Wet Winters

Why do so many barns and shops around Concrete have metal roofs?

Metal sheds snow and needles, is quick to install in long panels, and suits low-maintenance outbuildings. For a barn or shop that nobody climbs on, the speed and the lack of shingle moss are strong reasons. It also tolerates the long wet season without the softening that hits asphalt.

Large plain roofs are where metal is most economical, and acreage properties around Lyman and Acme have plenty of them. The page on barn, shop and outbuilding roofing covers the details for those buildings.

How does a metal roof behave in snow?

Snow slides off smooth metal more readily than off shingles, sometimes in a sudden sheet. That keeps loads off the roof but sends snow onto whatever sits below. Snow guards can hold it, and the roofer should ask what is under the eaves before choosing a design.

Skagit County publishes snow load zones by parcel through a GIS layer, with the zones in the county layer running from 25 to 50 pounds per square foot. This site does not state a figure for any town. The county sets the design load for your parcel, and a roofer or builder should check it.

For the broader comparison of materials in this weather, read the guide on metal or shingle roofs in the North Cascades, and see snow load and roof care for what to do when snow sits.

Is a metal roof noisy in the rain, or prone to condensation?

Rain on bare metal can be loud on a building with no ceiling insulation, such as a shop. Over a finished, insulated ceiling it is much quieter. Condensation forms on the underside of a cold panel when warm moist air meets it, so underlayment and ventilation matter.

Workshops that are heated in winter are the usual place condensation shows up, with beads of water dripping from the roof. It looks like a leak and is not. A roofer should discuss a condensation barrier or insulation with you before panels go on.

Can metal go over an existing roof?

Sometimes, depending on the roof's condition and local rules. Laying metal over old shingles saves tear-off but hides the deck and can trap moisture. Many roofers prefer to strip the roof first on a house. Ask what your roofer recommends and what the county or city building department requires.

This is a place where the permit question matters. Ask the building department that covers your address, and ask the roofer to put the plan in writing. The permit guide lists what to ask.

Who installs metal roofs in the upper valley, and how do you choose?

Fewer roofers install standing seam than shingles, so ask each how many metal roofs they have done, whether they form or order panels, and who handles flashing and trim. Look at a finished local roof if one is offered. Verify registration with the Department of Labor & Industries before signing.

Metal is unforgiving of poor detailing. Dissimilar metals touching, long panels without room to expand, or screws driven too tight each cause trouble years later. A written scope that names the panel, the gauge, the finish and the trim items lets you compare quotes fairly.

Because the best installers may be based in the lowlands, ask how the schedule works for a house near Concrete, what happens if panels arrive and rain delays the crew, and how the roof is kept watertight overnight. Honest answers to those questions are a good sign.