Roof Leak Around Dormer

Check the flashing beneath the corner trims along.

Roof leak around dormer.

The main problem is at the bottom corners. 1 improperly installed or deteriorated roof to wall or roof to roof valley flashings at top back of dormer. Worn out flashing or missing sealant can also cause roof leaks around dormers. A roof leak is extremely aggravating.

Look for signs of rotting or a missing piece of siding. The flashing that goes horizontally across the roof the apron flashing should extend about 4 6 inches beyond the wall of the dormer. It can cause water damage to your ceilings and walls mold in your home s insulation or rotting rafters and roof sheathing. Even though these were previously billed as solutions for the leak a new roof and new siding did not stop the leaking.

Finding the leak 1. Lack of flashing at top of trim over window. Use a flashlight to ensure the flashing extends. 3 deteriorated caulk around window and sill.

Dormer roof repairs require some time and a few tools but are considerably cheaper than replacing an interior wall damaged from the leak. The interior walls of the dormer were often condensated and heavy rains would lead to water damage on the lower level foyer ceiling. Improperly installed or deteriorated roof to wall flashings. Here s a few of the defects that can cause dormers and their windows to leak.

Then the bottom piece of step flashing along the walls on both sides should extend down beyond the bottom corners by just a little. Dormer leaks can be caused from a number of issues. Look along the edge of the dormer siding where it meets the shingles. The heavy snows and ice of winter 2013 14 compounded the problem when ice damming on the roof backed up into the dormer and poured through to the foyer ceiling creating the situation shown above.

Most dormer leaks occur as the flashing deteriorates and the connection between the two roofs is weakened leading to leaks which may cause mould stains and damage within the walls of the house. Here s a few of the defects that can cause dormers and their windows to leak. Examine the trim and siding around the dormer. Like an eighth of an inch.

Rotten or missing trim or siding can allow water to leak behind flashing and into your roof. When inspecting your roof look for step flashing that has shifted as this could leave areas exposed.