The siding year in the Gallatin Valley
Bozeman began in 1864 as a farm and trade town in the Gallatin Valley, and it has been the Gallatin County seat since the county was created on February 2, 1865. Its houses span more than a century and a half of building, but every one of them has the same yearly rhythm: a long cold season when the siding is under snow and ice, and a shorter warm season when repairs and paint can happen.
This calendar quotes no temperatures: NOAA's engineering weather set has no station near Bozeman.
Winter: December to February
- Keep snow off the wall. Shovel or blow drifts back from the house, and don't pile plowed snow against the siding.
- Use plastic, not metal. A metal shovel or a snow blower chute can crack cold vinyl.
- Watch the eaves. Big icicles and thick ice at the roof edge mean meltwater may be backing up. Water behind an ice dam can run down inside the top of the wall.
- Check inside walls. Frost, damp spots or stains near windows and outside corners can mean moist air or water is getting into the wall.
- Write it down. Note and photograph problems; most repairs wait for warmer weather.
Spring: March to May
- Walk the house after the thaw. Look for cracked or loose panels, open joints, popped nails and gaps at corners.
- Look low. The bottom courses, where snow sat all winter, show damage first: soft or swollen boards, peeling paint, stains.
- Check flashing above windows and doors and where roofs meet walls.
- Clean gutters and downspouts and make sure meltwater runs away from the house.
- Line up a contractor early. The repair season is short, and calendars fill.
Summer: June to August
- Make repairs and replace damaged boards or panels.
- Re-caulk joints around windows, doors and penetrations with a sealant rated for exterior use and for the siding material.
- Paint or stain wood and fiber cement within the temperature range on the label.
- Wash the siding gently with a hose and soft brush; a pressure washer can force water behind the laps.
- Adjust sprinklers so they don't spray the walls.
Fall: September to November
- Finish exterior paint and caulk before nights get too cold for them to cure.
- Seal gaps at pipes, cables and vents.
- Clean gutters after the leaves fall and before the first big snow.
- Trim plants back from the walls and move firewood away from the house.
- Drain outdoor faucets and hoses.
Hiring for larger work
If the spring walk-around shows more than a few pieces to fix, get written bids. Effective January 1, 2026, Montana requires construction contractors to hold a license from the Montana Department of Labor & Industry; contractors that held an active Montana registration on December 31, 2025 were converted to the new license. Ask for the license number and look it up before work starts.
Keep a record
Keep the siding brand, style and color, your seasonal photos, repair invoices and warranty papers together. It makes the next repair or warranty claim much simpler.