Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
CertainTeed Home Additions & ADU: The Jacksonville Owner’s Guide
CertainTeed siding, trim, and exterior board products are common on Jacksonville home additions, and when a prior addition or ADU starts failing at the building envelope – warped siding, rotted trim, failed flashing – the fix usually runs between $45,000 and $130,000 for a full addition rebuild or enclosure repair in this market. Most homeowners discover the problem the same way: a soft spot near the roofline, water staining at a corner, or siding that’s pulled away from the substrate after a hard Florida storm season. We stock replacement CertainTeed matched profiles and install them on additions and ADUs across Jacksonville weekly, and we put a written price in your hand before the first board comes off.
We’re an independent Jacksonville remodeling contractor, not a CertainTeed dealer or affiliate. That matters because we’re free to tell you when a repair makes sense and when a full replacement is the honest answer. Curtis Lane has been running crews on Florida exteriors long enough to know that Jacksonville humidity reveals installation mistakes fast – and that Most of what looks like product failure is actually flashing and substrate failure underneath the CertainTeed itself.
Which CertainTeed Models This Applies To
On home additions and ADUs in Jacksonville, you’ll typically see CertainTeed Monogram vinyl siding, CedarBoards insulated siding, and CertainTeed restoration trim boards. The compatibility issue that trips up most owners is profile matching. A 4-inch double-4 Dutch lap from 2016 is not interchangeable with today’s 4-1/2 inch profile, even from the same manufacturer. If your addition was built with CertainTeed MainStreet or CedarBoards D6, you need the exact profile, not just the same color family. We pull a profile sample from your wall before ordering anything, so the replacement courses match without a visible seam.
The OEM-versus-aftermarket decision on CertainTeed is more consequential than on other parts. Aftermarket trim coil and board stock will install fine, but the color and grain emboss rarely match CertainTeed’s exact limestone or autumn maple tones. For a single corner repair on an addition, aftermarket saves little. For a full-side replacement, OEM matched through CertainTeed’s color retention warranty is the only choice that won’t announce itself. We carry the standard profiles on our truck; anything unusual gets ordered with a two-week lead in Jacksonville.
Styles & brands we work with
Signs Your CertainTeed Home Additions & ADU Is Failing
- Rippling or wavy siding on one wall. This tells you the substrate behind the CertainTeed is swelling – usually OSB or plywood that’s been drinking humidity for months. The siding is not the problem; it’s a symptom of trapped water.
- Chalky residue washing down from the boards. Florida UV is brutal on vinyl. CertainTeed’s color retention holds up longer than most, but a wall that receives full afternoon sun will show oxidation that water carries down onto windows and brickwork.
- Trim pulling away at corners and soffits. The restoration trim board expands and contracts more than the framing behind it. When fasteners rust in humid air and holes get wallowed out, the trim starts to gape. That gap is a water entry point.
- Soft spots in the wall sheathing near the addition roofline. This is the classic failed-flashing failure. Jacksonville additions built by cut-rate crews often lack kick-out flashing at roof-to-wall intersections, and the damage done in just two storm seasons is expensive to undo.
- Visible water stains on the interior drywall of the ADU. By the time the stain shows, the leak has been running for weeks. The stain is where the water stops, not where it starts. The entry point is almost always further up or at an exterior joint.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
For Jacksonville, a full addition envelope rebuild with CertainTeed siding, trim, flashing, and house wrap runs $45,000 to $130,000 installed. A single-wall repair to replace failed flashing and a damaged corner board lands toward the low end. A full ADU re-side with scaffold work and rotted sheathing replacement pushes the top. The range exists because water damage is never evenly distributed, and we won’t know the substrate condition until the old boards come off.
What’s included: written line-item price before work starts, removal and disposal of the failed materials, new flashing at every penetration, CertainTeed-matched siding and trim, and a signed 365-Day Done Right Promise when we close out. If a joint fails or a board warps within the guarantee window, we come back and fix it at no charge. That promise is in writing, not handshake.
DIY or Call Us?
You can safely check for visible gaps, loose trim, and interior water staining yourself. That’s worth doing because it helps you know whether the problem is one corner or a whole wall. What you should not do is pull CertainTeed boards off a Florida addition without understanding how the house wrap and flashing run underneath. We’ve seen homeowners strip a wall, trap moisture behind new boards, and turn a $5,000 flashing repair into a $45,000 sheathing replacement within a year.
If the failure involves high-tension work at a second-story soffit, scaffold access, or any structural sheathing repair, call a trained crew. Curtis Lane’s team has been re-siding Jacksonville homes long enough to know what the substrate looks like before the first board comes off. Call (904) 337-5929 and we’ll walk the addition with you, show you exactly where the water is getting in, and give you a written price.
FAQs
CertainTeed Monogram vinyl carries a lifetime limited warranty against manufacturing defects, and in most applications it will last 30-plus years in Jacksonville. But Florida sun and humidity expose installation errors in two to three seasons. The product rarely fails. The flashing and substrate behind it often do. That’s why we pull a profile sample, inspect the sheathing, and repair the envelope before we hang new boards.
Yes, in most cases. If the failure is localized – one corner, one roofline intersection, one section of trim – we repair that section with a matched CertainTeed profile and correct the underlying flashing issue. The only time a full replacement makes sense is when water has migrated through the wall cavity and the sheathing is compromised on multiple sides. Call (904) 337-5929 for an exact scope – estimates are free.
A single-wall flashing and board replacement typically takes two to three working days. A full ADU re-side with sheathing replacement can run one to two weeks depending on scaffold setup and how much substrate repair is required. We schedule around Jacksonville’s rain patterns in summer and lock the timeline into the written scope before any work starts.
We carry standard CertainTeed Monogram double-4 profiles, CedarBoards samples, and restoration trim stock on the truck for matching. Unusual profiles or discontinued color lots get ordered from CertainTeed’s distribution network and arrive in Jacksonville within about two weeks. We also work with KraftMaid, Cambria, and Silestone on interior finishes, so if you’re incorporating a kitchen or bath into the addition, the same written-price standard applies across all of it.
Written by Curtis Lane, Owner, Bradford Remodeling Co Jacksonville at Bradford Remodeling Co Jacksonville, serving Jacksonville and nearby areas.
