Shared roofs, party walls and flat sections
Where townhomes meet, the joint between units is a typical trouble spot. Differential movement and water can open up flashing along the wall, and a small leak may travel through the shared structure for some time before it appears as a stain. Condo boards and neighbours need to agree on who is responsible for which part.
Plazas and apartment blocks nearby tend to have flat roofs with drains, parapets and rooftop equipment. Ponding water, split seams and blocked drains are common issues, and snow drifts against parapets and units each winter. Annual checks and clear drains help, and a small repair after the spring thaw costs far less than an interior leak.






