Contractors and designers use a lot of industry shorthand that isn't always explained along the way. This glossary covers the terms that come up most often during a sunroom, patio cover, pergola, or hardscape consultation, so you can follow the conversation and ask sharper questions.
Structure & Glass Terms
Low-E glass: glass with a microscopically thin coating that reflects heat while letting light through, reducing UV damage and cooling costs. Thermal break: a non-metal insulating strip inside an aluminum frame that stops heat from conducting straight through the metal — standard on four-season sunrooms. Fan beam: a reinforced structural beam built into a patio cover or pergola specifically to support the weight of a ceiling fan or light fixture.
Patio Cover & Pergola Terms
Louver: an individual slat in a pergola roof that can be fixed or motorized to rotate for adjustable shade and rain control. Freestanding vs. attached: whether a structure connects to your home's roofline (attached) or stands independently on its own posts (freestanding). Fascia: the horizontal board where a patio cover or pergola attaches to the edge of your home's roofline.
Hardscape & Landscaping Terms
Polymeric sand: a sand-and-polymer blend used between pavers that hardens to lock them in place and resist weeds. Hydrozoning: grouping plants by water need so you're not overwatering drought-tolerant plants to keep thirstier ones alive nearby. Permeable pavers: a paver system that lets water pass through the joints into a gravel base below instead of running off, reducing stormwater runoff.
Process & Paperwork Terms
Engineered drawings: stamped structural plans, prepared by a licensed engineer, required for most permit applications. Setback: the minimum distance a structure must sit from a property line, set by your city or county's zoning code. HOA architectural review: a separate approval process, distinct from the city permit, where your homeowners association reviews design, materials, and placement before construction can begin.
Frequently Asked Questions
No — we walk through anything relevant to your specific project during the consultation. This glossary is just a reference if you want to follow along more closely or compare quotes from multiple contractors.
A setback is a city or county zoning rule about distance from property lines, and it applies regardless of HOA status. An HOA architectural review is a separate, private approval process specific to your community, on top of whatever the city requires.
Not typically — thermal breaks matter most for four-season rooms where you're paying to heat and cool the space. A three-season room uses simpler framing since it isn't climate-controlled.
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