A house by the water with one very tall room
Musselman’s Lake is the lakeside corner of Whitchurch-Stouffville, east of the town, where homes sit among trees close to the shore. This house was built around a single great room: a two-storey space with tall windows facing the lake, a stacked-stone fireplace rising up one wall and light oak floors. A small dining nook opened off one side. The walls were a tired tan that made the room feel darker than it was, and the owners wanted it bright white, with one strong colour in the nook.
The job was the great room walls and ceiling, the window returns and sills, the dining nook, and the trim in both spaces. The fireplace stone was to stay exactly as it was.
Moisture, mildew and an old stain overhead
Lakeside air carries more moisture than air in town, and in winter it shows up on cold glass. Here the condensation that formed on the tall windows had been running down onto the drywall returns and sills each cold season. The result was clusters of small black mildew spots at the bottom corners of almost every window, and in places the paper face of the drywall had gone soft and bubbled.
The second problem was overhead. An old roof leak near the chimney, since dry, had left a large brown ring on the great room ceiling. Water stains like this bleed straight through ordinary latex paint, sometimes after it has dried, so simply rolling white over it would not work.
On top of that, the ceiling was well above the reach of any ladder that could stand safely on the oak floor without a platform, and the open fireplace wall had to be worked around without marking the stone.
Getting the damp areas clean and dry before anything else
Protection
The oak floors were covered with breathable drop cloths, which let any moisture escape rather than trapping it against the wood. The fireplace was draped in a light drop sheet hung from the mantel shelf, and no tape was put on the stone faces at all. A rolling scaffold tower with locking casters was assembled in the room, with its wheels sitting on boards to spread the load on the floor.
Cleaning the mildew
- Each spotted return and sill was scrubbed with a diluted bleach and mildew cleaner solution, left to work for the dwell time on the label, then rinsed with clean water. Painting over mildew without killing it lets it grow back through the new paint.
- The areas were left to dry with a fan running, and we checked them with a pin-type moisture tester. Primer went on only once the drywall read dry.
Repairing the softened drywall
Where the paper face had bubbled, it was cut back to firm material with a sharp knife. The torn paper edge was sealed with a drywall paper sealer so it would not lift again when wet compound touched it, then filled with a setting compound, which resists moisture better than premixed patching. After sanding, the corners of each return were checked with a straightedge so the sills would sit square under paint.
Sealing the water stain
The brown ring on the ceiling was primed with a shellac-based stain blocker, applied from the scaffold and feathered a little beyond the stain’s edge. Shellac sets up a barrier that stops the brown tannins and minerals from leaching into the finish coats, which water-based primers do not always manage. The rest of the ceiling received a regular primer so it would take the finish evenly.
Walls and trim
The tan walls were washed down, small dents and screw holes were filled and spot primed, and gaps at the baseboards and casings were caulked.
Painting a room this tall
Ceiling
From the top of the scaffold the ceiling was rolled in flat white in two coats. The tower was moved across the room in overlapping sections so each coat was rolled into a wet edge, which keeps a large ceiling from showing bands.
Great room walls
The walls went from tan to white in a washable eggshell. Covering a mid-tone like tan with white takes a good primer and two solid finish coats, and that is what went on. Working from the scaffold for the upper half and from the floor below, each wall was rolled in vertical lanes. Along the stone, the line was cut in freehand with a small angled brush, following the irregular edge of the stonework.
Window returns and sills
Because the returns will always see some winter moisture, they were finished in a mildew-resistant satin rather than the wall eggshell. The slightly higher sheen sheds water more easily and wipes clean, and the mildew-resistant formula slows any regrowth. Two brushed coats were applied, with the sills done last.
The navy nook
One wall in the dining nook was painted navy in eggshell over a tinted primer, two finish coats, and the adjoining walls were kept white so the nook reads as one bold panel against a bright room.
Trim
Baseboards and window casings got two coats of white waterborne semi-gloss, brushed and laid off in long strokes.
A white for lake light, and a navy for the nook
At the colour consultation we put sample pots of several whites on the walls beside the windows and on the shaded wall next to the stone. Light reflecting off the lake gave the morning a blue cast, and in that light the coolest white looked chilly. In the late afternoon, with the sun lower, the warmest sample looked almost cream beside the grey stone. The owners picked a balanced white that stayed clean at both times. For the nook, navy samples were tried; they chose one with a touch of green, which picks up the colour of the water and trees through the windows.
Daily tidying around the scaffold
The scaffold tower stayed up while the high work was in progress, but at the end of every day its casters were locked, the platform was cleared of tools, and everything on the floor was gathered and stacked out of the way. The drop cloths were swept and the fan used for drying was switched off and stored. The owners chose a zero‑VOC paint for the walls, since the great room is open to the upstairs bedrooms.
Keeping moisture from coming back
- Wipe condensation off the window glass and returns on cold mornings, especially after cooking or showers.
- Run a dehumidifier or the home’s ventilation in the coldest months. Lower indoor humidity means less water on the glass.
- Pull curtains and furniture an inch or two away from the windows and exterior corners so air can move.
- If black spots show up again on the satin returns, clean them early with a mild mildew cleaner, and let them dry before any touch-up.
- A new brown mark on the ceiling would point to a fresh leak, so have the roof checked before painting over it.
- Touch-up cans of the white, the navy and the satin were left labelled with the area each belongs to.
Why lakeside homes here need moisture work first
Homes around Musselman’s Lake deal with damp air off the water, and inside that shows up as condensation, mildew and stained drywall long before the paint itself wears out. That is why interior painting in a lake house starts with cleaning, drying and the right primer, and only then turns to colour. Elsewhere in Whitchurch-Stouffville, an older home near Main Street or a new subdivision house brings its own prep, and we treat each one on its terms, as we do across York Region. Low-odour and zero‑VOC paint options, at least two finish coats and an itemized written quote are part of every job. If your lakeside home has mildew at the windows or a stained ceiling, reach out and we will come and look.
