October — Before Freeze-Up
- Test the sump with a bucket of water. Confirm it starts, lifts, and shuts off cleanly
- Check the discharge line is clear and ends well away from the house
- If there is a battery backup, test it; if there is not, fit one now rather than in March
- Fit a water alarm if you do not have one — under $100
- On seasonal property, this is the visit that matters most all year
Testing the pump in October rather than March is the single highest-value item on this page. A pump that has sat unused since last spring is exactly the pump that does not start.
November — After Leaf Fall
- Clear the gutters properly, once the leaves are actually down
- Confirm every downspout discharges at least six feet from the foundation
- Walk the perimeter and look for ground that has settled toward the house
- Check window wells are clear and covered
December to February — Through the Winter
- Keep piled snow away from the foundation. Shovelled and ploughed piles melt straight down beside the wall
- Watch for ice dams — they put roof water somewhere it was not designed to go
- Check the sump discharge has not frozen shut
- On seasonal property, arrange for somebody to look at the building
March to April — The Melt
- Get everything off the floor — pallets, shelving, anything
- Test the sump again before the melt, not during
- Keep anything electrical well above any likely water line
- Clear snow from the problem side of the house as it softens
- If it floods anyway, note exactly where and when — that is your diagnosis for July
July — The Month That Actually Matters
Do the permanent work in summer. Dry ground, easier excavation, lower cost, no queue — and the system in place before the next melt.
This is the part people get wrong. Everybody calls in March, because March is when the basement is wet. But March is the worst possible time to do the work: saturated ground, frozen ground, every contractor in the region booked, and a decision made under stress.
The right move in March is to get through it — pump, alarm, things off the floor — and to write down exactly what happened. Then book the work for June or July, when it is cheaper, easier and calmer. A basement problem you have known about since last March is not an emergency; it is an annual appointment you have not yet made.
Things That Catch People Out
The frozen discharge line
A sump discharge that does not fully drain between cycles can freeze solid in February. The pump then runs against a blocked pipe, achieves nothing, and the basement takes water anyway — with a pump that appears to be working. Proper fall on the line and a freeze-relief fitting prevent it, and it is worth asking about specifically.
The outage that comes with the melt
Heavy wet snow and spring storms take power lines down. That is the same weather that fills your sump pit. A pump without battery backup is entirely reliable until the one night it is not, and on a seasonal property nobody discovers that for two months.
Questions
Does shovelling snow away from the house really help?
Where snow has been piled against the wall by shovelling the drive or by a plough, yes — that concentrated pile melts directly into the ground beside the foundation. Undisturbed snow lying evenly across a lawn is much less of a concern, because it melts across the whole area rather than in one place against your wall.
Should I run a dehumidifier during the melt?
It will not stop water arriving, but it helps enormously afterwards — getting the space dry quickly is what prevents a wet week becoming a mould problem. If the basement has taken water, drying it out promptly matters as much as the water leaving.
Is it worth calling in March at all?
Yes, for anything urgent — a failed sump, water in finished space, active damage. And yes for an assessment, because seeing the basement while it is wet is genuinely the best diagnostic conditions there are. What is usually better deferred is the construction itself.
What if this is my first spring in the house?
Then this March is information. Note exactly where water appears, when it starts, how long it lasts, and how much. Photograph it. That record is worth more than any amount of speculation, and it makes the summer conversation a short one.