Heated Patios & Terraces Questions

Outdoor surfaces lose heat on all exposed sides, so the required BTU output per square foot is higher than for an enclosed slab. Altitude derating at 5,280 feet also reduces hydronic boiler output, so both factors are built into the load evaluation before the scope is written.

Hydronic lines with insufficient glycol concentration can freeze and burst in a hard Denver winter. A burst line can crack pavers, flood the subbase, and require full excavation to repair. The glycol spec and activation threshold are documented in the written scope to prevent this.

Hydronic suits larger terrace areas where the BTU demand justifies the manifold and boiler cost. Electric resistance systems are better for smaller patios or retrofits where running a hydronic loop outdoors is not practical. The assessment determines which fits your specific situation.

Permit requirements vary by project type and Denver-area jurisdiction. The installer reviews permitting requirements at the assessment stage, before any work is scheduled, so you know what is needed upfront.

Yes, but the retrofit approach depends on the existing surface material and subbase depth. Electric mat systems are often more practical for retrofits. The installer assesses the existing construction and confirms the viable options in the written scope.