Roof Replacement in Sumas, Washington

Sumas sits at the mouth of the Fraser Valley gap, hard against the Canadian border, and every homeowner in town knows what that means: when a cold-season northeaster sets up, Sumas takes some of the strongest sustained outflow winds in western Washington. Add the Nooksack River floodplain that made national news in the November 2021 flooding, and you have a small farm town whose roofs work harder than roofs almost anywhere else in Whatcom County.

Wind First, Water Always

The outflow wind is the defining force here. It arrives cold and dry out of the northeast, gusts for days at a time, and peels at any shingle edge that was not fastened for it. The most common failures we see in Sumas are wind-stripped tabs on north- and east-facing slopes, creased shingles that leak long before they blow off, and ridge caps missing after a hard blow. Standard four-nail installation that passes in Bellingham is simply not enough on this side of the county.

The rest of the year brings ordinary Nooksack Valley wet: long stretches of rain, moss on shaded slopes of the town's older farmhouses and early-1900s homes, and gutters overwhelmed by fall storms. Roofs here need to be built for both personalities of the local climate.

How Alpine Builds a Sumas Roof

Alpine Exteriors has spent 25 years roofing in northwest Washington, including plenty of work in the border towns where wind ratings stop being theoretical.

• High-wind architectural shingles, six-nailed per manufacturer spec, with upgraded starter strips at eaves and rakes
• Metal roofing options that many valley farm properties prefer for outbuildings and increasingly for homes
• Fully adhered ice-and-water membrane at eaves and valleys for wind-driven rain and the occasional hard freeze the outflow brings
• Reinforced ridge and hip caps, the first components a northeaster attacks

Farm Properties Welcome

Sumas is still a working agricultural town, and we roof shops, barnhouses, and detached garages alongside residences, often in a single mobilization that keeps costs down for the whole property.

Local Enough to Come Back

Storm-chasing crews appear in the county after every major wind event and are gone before the warranty claims start. We are the opposite: more than 2,000 completed projects in this region, a 25-year workmanship warranty we expect to be here to honor, and free on-site estimates that include getting on the roof, photographing what we find, and telling you honestly whether you need repairs now or a replacement before next winter's outflow season. If your Sumas roof lost pieces in the last northeaster, or you simply want it checked before the next outflow event lines up in the forecast, get us out for a look. In a town where everyone can tell you which direction the weather comes from, your roof should be built by people who already know the answer.