Snow load on a cabin roof is the kind of thing owners think about once, when they buy, and then not again until a neighbor's carport folds. Around Mt. Hood Village the elevation is modest, roughly 1,300 to 1,600 feet in Welches and Brightwood, so people assume snow is not a big deal. Most winters it is not. Then a warm, wet system stalls over the Cascades and drops two feet of what locals call Cascade concrete in 36 hours, and suddenly it is the only thing that matters. Here is how we think about it for the cabins we look after.
Why wet snow is the problem
Snow load is about weight, not depth. Powder is light. The maritime snow that falls at low elevation in the Cascades is dense and often followed by rain, which soaks into the snowpack and can roughly double the weight without adding an inch. A foot of wet, rain-soaked snow can weigh several times what a foot of dry snow does. Then it refreezes into ice, which is heavier still.
Your roof was designed to a code snow load appropriate for your elevation when it was built. Older cabins, additions, carports, and covered porches are the weak spots, because they were often built to a lower standard or not engineered at all.
Know your roof
- Pitch: steep metal roofs shed snow on their own, sometimes all at once. Low-slope or flat sections hold it.
- Material: metal sheds; composition shingles hold. Many cabins have both.
- Valleys and dormers: where snow collects and where drifting adds load unevenly.
- Overhangs and porch roofs: often the least engineered part of the structure.
- Age and history: if you do not know when it was last inspected, that is your answer.
If you own a cabin and have never had a structural or roofing contractor look at the framing from the attic side, do it before winter. It is a small expense compared to the alternative.
Warning signs
Interior doors that suddenly stick or will not latch. Cracks appearing in drywall at corners or above door frames. Creaking or popping sounds. A visible sag in a ridge or a porch roof. Sprinkler or plumbing lines that look bowed. Any of these during or after a heavy snow means get people out and get someone to look at it.
When and how to remove snow
Most well-built roofs at Mt. Hood Village elevation never need snow removal. The exceptions are prolonged storms with rain on snow, flat or low-slope sections, and older or questionable structures. A roof rake from the ground can pull snow off the eaves of a single-story section safely. Do not put anyone on a snowy roof. Do not use a metal shovel or chip at ice; you will damage the roofing for a problem that mostly solves itself in a thaw.
For bigger cabins, having a local contractor on call who can assess and clear is worth arranging in the fall, before every contractor in the district is booked. This is part of the maintenance coordination we handle for owners at Wildwood Basecamp and the other cabins on our list.
Ice dams and where the water goes
Heat escaping through a poorly insulated attic melts snow on the roof, the water runs to the cold eaves and refreezes, and a dam forms. Water backs up under the shingles and into the ceiling. The fix is insulation and ventilation, not heat tape, though heat tape in the gutters helps in the short term. If you see icicles the size of your arm along the eaves, you have an ice dam problem and probably an energy bill problem too.
The stuff around the roof
Snow sliding off a steep metal roof lands somewhere. Make sure that somewhere is not the propane tank, the heat pump, the dryer vent, the furnace exhaust, or the hot tub. A blocked furnace vent under a snow pile is a carbon monoxide hazard. A hot tub cover will not survive a roof avalanche. Deck railings and deck framing take snow load too, and decks are usually built lighter than roofs. Clear the deck when it gets deep, and clear a path to every vent after every storm.
This is also the season when critters move in under the eaves. Our post on pest prevention in the woods covers the late-fall inspection that pairs well with a roof check.
Guests during a big storm
Tell them plainly: stay off the roof, park where the roof does not shed, keep the vents clear, and call us if doors start sticking. Give them the emergency contact and make sure it is someone who can get there. Chains may be required on Highway 26 above Rhododendron and guests should know that before they arrive without them.
Winter is the best season at Mt. Hood Village and a well-maintained cabin sails through it. The Mt. Hood owners page lays out how we handle the maintenance side, and a earnings review will show you what a winter-ready cabin can do. Get the roof looked at first. Then enjoy the snow.