Why should gutters be cleared before the first snow?
A gutter that is full or blocked when the first thaw comes holds meltwater at the eave, where it freezes. That ice is the start of an ice dam, which can push water under the roof covering and into the walls and ceilings.
The sequence matters. Snow sits on the roof, the upper slopes warm enough to melt it, and the water runs down toward the cold edge. If the gutter is open and sloped, the water leaves. If the gutter is full, the water pools and freezes at the lip. Over a winter the ice builds, and the water behind it finds a path under the covering and into the attic and walls.
The University of Minnesota Extension describes the same mechanism in its guidance on ice dams. Its point is that ice dams need snow on the roof and a temperature difference across the roof surface, so that the upper part is above freezing while the lower part is below. A clear gutter does not stop the snow from melting, but it lets the meltwater leave before it can refreeze at the edge.
Is it my gutter or the roof that is causing the leak?
A gutter that overflows or pulls away can send water behind the fascia and into the wall or the roof edge, which looks like a roof leak. A technician checks both the gutter and the roof edge to find the real source.
Water running over the front of the gutter during a rain often soaks the fascia, and that water can run back under the roof covering at the edge. The stain you see on a ceiling near an outside wall may come from the gutter rather than the roof surface. Tracing the path from the stain back to the gutter line is part of the job, and it is why the roof and the gutter are looked at together.
The reverse is also true. A roof leak can run down the inside of the fascia and drip into a gutter, so the gutter is not always the cause. The technician checks both before deciding on the repair, and says which one is the source of the problem.
Can I clean and check my own gutters?
Clearing debris from a gutter at ground level is a reasonable task for many homeowners. Working on a ladder, and any work on the roof edge, is more dangerous and is best left to a technician.
Use a sturdy ladder on firm, level ground, and have someone hold it. Do not lean out to one side, and do not stand on the top rungs. Scoop debris by hand into a bucket rather than flushing it into the downspout, and check that the downspout runs freely afterward. Keep clear of any overhead wire, and do not climb onto a snow-covered or icy roof to clean the gutter.
A homeowner can also watch the gutter from the ground during a storm. Water over the front, a dripping seam or a sagging run are visible signs that the gutter needs attention. Note them and mention them to the technician, since the cause is often clearer when the water is seen in motion.
What moves the cost of gutter work up or down?
The length of the run, the number of downspouts and corners, the condition of the fascia, the height of the eave and the access all change the price. The cost is explained and approved before work starts, and no figure is printed here.
A short, low, straight run with a sound fascia is a small job. A long run with several corners, a high eave or a damaged fascia takes more time and more material. Replacing the fascia along with the gutter adds work and changes the scope. The technician counts the sections, the hangers, the outlets and the downspouts, and records the condition of the fascia.
The access to the eave also changes the job. A house on a steep lot or with a tall wall needs more equipment, and the placement of the downspouts can require changes to the grading at the foundation. You will be told what the work involves and what it costs before any work starts.
Does a gutter repair need a permit?
Most gutter repair is a small job that does not need a building permit, but the answer depends on the scope of the work and the jurisdiction. The building office for the address can confirm whether a particular job needs one.
In Moscow the Building Safety Division handles permits and can say whether a gutter or downspout job at your address requires one. Outside city limits, the county building official is the right contact. If the work is combined with roof repair, the permit question is decided by the roof work, so ask the same office about both at once.
In Pullman, Washington, the city's permit pages set out the requirements for residential work, and the Washington rules apply on that side of the state line. The technician will say which rules apply before the job begins, and will check that the work meets them.