Signs Your Fascia Is Rotting Behind the Eavestroughs in Ottawa

Detecting fascia rot behind your eavestroughs can be tricky because the gutter itself hides the upper portion of the fascia board where damage typically starts. However, there are several telltale signs you can spot from the ground and during routine eavestrough maintenance that indicate your fascia needs attention before the damage gets expensive.

The most obvious sign is eavestroughs pulling away from the house. Your eavestrough hangers are screwed or nailed directly into the fascia board, so when that wood softens from rot, the hangers lose their grip. If you notice sections of gutter sagging, tilting outward, or separating from the roofline — especially after a heavy snowfall or ice loading — rotted fascia is a likely culprit. In Ottawa, this is extremely common because the heavy snow loads and ice buildup put tremendous stress on fascia-mounted hangers throughout winter. A single heavy wet snowfall can load 200 to 500 kilograms per cubic metre onto your gutter edge, and soft fascia simply cannot hold.

What to Look for During Inspection

Paint that is peeling, bubbling, or flaking along the top edge of the fascia where it meets the drip edge or the back of the eavestrough is an early warning sign. Moisture is getting trapped between the gutter and the fascia, and the paint is failing because the wood underneath is absorbing water. Dark staining or discolouration running down the face of the fascia, particularly at seams or end caps of the eavestrough, suggests water has been leaking at those points for some time.

When you clean your eavestroughs in spring or fall, take a moment to press firmly on the fascia board behind the gutter with a screwdriver or awl. Healthy wood feels solid and resists penetration. Rotted wood will feel spongy and the tool will push in easily, sometimes crumbling. Pay special attention to areas around downspout outlets, inside corners, and anywhere two sections of eavestrough meet — these are the highest-moisture zones.

From the ground, look for wavy or uneven fascia lines. Rot causes wood to swell and warp, creating a visible irregularity in what should be a straight horizontal line. Also check for small holes or sawdust-like debris on or below the fascia, which indicates carpenter ant or woodpecker activity — both are attracted to moisture-damaged wood, and both are common in Ottawa's heavily treed neighbourhoods.

Ottawa's climate is particularly hard on fascia boards. The constant freeze-thaw cycling — over 50 cycles per winter — works moisture deeper into any existing cracks or paint failures. Ice that forms behind the eavestrough exerts tremendous pressure on the fascia surface, and meltwater has nowhere to go except into the wood grain. Many Ottawa homes built in the 1960s through 1980s still have original wood fascia that was only protected by paint, and after 40-plus years, much of it is at or past its useful life.

Replacing rotted fascia in Ottawa costs $12 to $25 per linear foot depending on the extent of damage, access height, and whether you are replacing with new wood or upgrading to aluminum fascia capping over new wood. Aluminum capping adds about $5 to $10 per linear foot but eliminates future rot concerns by sealing the wood completely. Since the eavestroughs typically need to come down to replace fascia, many Ottawa homeowners combine fascia replacement with new eavestrough installation to save on labour.

If you suspect fascia rot, getting a professional assessment sooner rather than later saves money — rot spreads, and once it reaches the rafter tails or roof sheathing, the repair cost jumps significantly. The Ottawa Construction Network directory at justynrookcontracting.com is a helpful resource for finding contractors who handle fascia, soffit, and eavestrough work in the Ottawa area.