PGT Home Additions & ADU Nationwide

PGT Home Additions & ADU: The Miami Owner’s Guide

PGT-compatible windows and doors for home additions and ADUs in Miami typically run $53,100 to $153,400 for full addition construction with PGT impact-rated products installed, depending on square footage and whether you’re building up or out. We stock common PGT frame profiles, impact glass units, and hardware kits for same-day replacement on failed components in existing additions. Most Miami homeowners discover a problem when they feel Gulf Stream humidity pushing past a warped sill during afternoon storms, or when a door won’t latch after a season of salt-air exposure.

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Which PGT Models This Applies To

We work with PGT’s full residential line: WinGuard aluminum and vinyl impact windows (single hung, horizontal roller, casement), WinGuard and PGT Architectural door systems, and the custom-sized units PGT builds for addition openings that don’t match standard rough-in dimensions. The critical compatibility point is the frame generation: pre-2017 PGT aluminum frames used a 2-5/8 inch jamb depth, while current production runs 3-1/4 inch to meet Miami-Dade’s updated HVHZ (High Velocity Hurricane Zone) requirements. Check the etched marking in the glass corner or the AAMA certification label on the frame head. For additions and ADUs, we see the most callouts on PGT’s 7700 series single hung and the 5800 series horizontal roller, both common in Coconut Grove and Coral Gables infill projects where owners matched existing fenestration. OEM PGT glass and hardware maintain the original Miami-Dade NOA (Notice of Acceptance) certification; aftermarket equivalents exist from CWS and ES Windows, but we source PGT direct for anything carrying a structural load or requiring re-inspection, since the NOA paperwork must stay intact for resale and insurance purposes.

Signs Your PGT Home Additions & ADU Is Failing

• Condensation between impact glass panes. The insulated glass unit (IGU) seal has failed, allowing South Florida humidity into the air gap. This destroys the Low-E coating’s thermal performance and eventually etches the interior glass surfaces.
• Frame corner separation or sill bowing. Thermal expansion cycles in Miami’s 90-degree daily swings stress vinyl welds and aluminum corner keys; salt-air corrosion accelerates the fatigue in beach-adjacent properties from Key Biscayne to Sunny Isles.
• Hardware binding or latch misalignment. The multipoint locking system’s shoot bolts no longer engage cleanly, usually because the frame has settled or the stainless-steel components have galled from grit and lack of lubrication.
• Visible delamination of the laminated impact interlayer. The PVB (polyvinyl butyral) sheet between glass plies clouds or bubbles, compromising both clarity and the structural integrity that holds shards in place during a storm impact.
• Air infiltration at weatherstripping contact points. The Santoprene or pile fin seal has compressed beyond recovery or the kerf slot has widened, letting conditioned air escape and driving cooling costs up 15 to 20 percent in summer months.

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Replacement Cost & What’s Included

For a full home addition with PGT impact windows and doors integrated, Miami pricing runs $53,100 to $153,400 based on square footage, structural connections to the existing roofline, and whether the addition requires a new slab or can tie into existing footings. A standalone PGT window replacement within an existing addition typically falls between $944 and $2,950 per opening, including removal, disposal, new NOA-compliant installation with proper sill pan flashing, and interior trim repair. Doors range $5,310 to $17,700 depending on size, impact rating, and whether it’s a single entry or multi-slide system. Every quote from Rowan Construction Group Miami is a flat written price with line-item scope before work starts, under Clause 1 of the Haven Standard. Our 365-Day Done Right Promise covers both labor and the PGT factory warranty we register on the customer’s behalf.

DIY or Call Us?

An owner can safely inspect: the AAMA label location, visible frame damage, and whether the issue is isolated to one unit or systemic across the addition. What goes wrong fast in DIY is the installation sequence. Impact-rated PGT units are heavier than standard windows, a 36-by-72 inch single hung weighs 85 to 110 pounds, and improper handling cracks the laminated glass before it ever gets set. More critically, Miami-Dade HVHZ installation requires specific anchoring patterns, continuous sill pan flashing tied into the weather-resistant barrier, and documented fastener torque values. Miss any of these and the NOA is void, the permit won’t pass inspection, and the insurance rider for wind mitigation is worthless. We’ve re-done four DIY addition window jobs in the last two years in Pinecrest and Palmetto Bay alone, each costing 40 percent more than our original quote because we had to remove damaged units and repair the WRB (weather-resistant barrier) the homeowner compromised. For PGT work in Miami, call (786) 321-4970 and we’ll deliver a written price before anyone picks up a tool.

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