Roof Leak Around Dormer

Examine the trim and siding around the dormer.

Roof leak around dormer.

Finding the leak 1. 1 improperly installed or deteriorated roof to wall or roof to roof valley flashings at top back of dormer. A roof leak is extremely aggravating. Use a flashlight to ensure the flashing extends.

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. 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. The flashing that goes horizontally across the roof the apron flashing should extend about 4 6 inches beyond the wall of the dormer.

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. The interior walls of the dormer were often condensated and heavy rains would lead to water damage on the lower level foyer ceiling. Like an eighth of an inch. 3 deteriorated caulk around window and sill.

Look along the edge of the dormer siding where it meets the shingles. Deteriorated caulk around window roofing leak at dormer roof roof damage from falling branch or hail. Worn out flashing or missing sealant can also cause roof leaks around dormers. Here s a few of the defects that can cause dormers and their windows to leak.

Dormer roof repairs require some time and a few tools but are considerably cheaper than replacing an interior wall damaged from the leak. Something that starts as a small problem a roof leak can lead to big damage and even bigger headaches. Look for signs of rotting or a missing piece of siding. Check the flashing beneath the corner trims along.

Dormer leaks can be caused from a number of issues. Improperly installed or deteriorated roof to wall flashings. Then the bottom piece of step flashing along the walls on both sides should extend down beyond the bottom corners by just a little. Even though these were previously billed as solutions for the leak a new roof and new siding did not stop the leaking.

It can cause water damage to your ceilings and walls mold in your home s insulation or rotting rafters and roof sheathing. The main problem is at the bottom corners.