Adding On
How an addition roof joins the existing roofline
Learn how a roof extension joins your existing roofline through a shed tie in, a gable with valleys, or a low slope link to prevent leaks.
Last revised October 22, 2026
How a room addition ties into an existing house, from footings and framing to roofline, utilities and inspections.
Learn how a roof extension joins your existing roofline through a shed tie in, a gable with valleys, or a low slope link to prevent leaks.
Building an extension on a house requires linking the new foundations, load bearing walls and mechanical systems directly to your existing structure.