IKO Home Additions & ADU Nationwide

IKO Home Additions & ADU: The West Palm Beach Owner’s Guide

IKO-compatible home additions and ADU construction in West Palm Beach typically runs $45,000-$130,000 for additions and $90,000-$220,000 for detached ADUs, with written quotes delivered before any work begins. We source IKO roofing and waterproofing components as part of our full build packages, and we stock common IKO ridge vents, underlayment, and starter strips for same-day deployment on active framing jobs. Most West Palm Beach owners first realize their IKO system needs attention when they spot granule loss on existing shingles during a planned addition tie-in, or when a building inspector flags inadequate ice-and-water shield at the addition junction - a detail that matters more in our humidity cycle than code minimums suggest.

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Which IKO Models This Applies To

IKO’s residential line breaks into three tiers we regularly integrate with home additions and ADUs in West Palm Beach: the Cambridge architectural laminate series, the Dynasty performance line with ArmourZone reinforcement, and the Marathon 3-tab economy shingle. The Cambridge and Dynasty lines both use IKO’s Fastlock or ArmourZone sealant strips, which means their ridge vent and hip/ridge cap compatibility overlaps - but the Dynasty’s heavier 240-pound-per-square weight demands beefier sheathing, typically 5/8-inch CDX minimum where Cambridge can sit on 1/2-inch in some jurisdictions.

To identify what you’ve got, check the printed strip on the shingle back for the series name and the manufacturing date code - IKO prints a two-letter plant code followed by the week and year. For addition tie-ins, the critical match isn’t just color; it’s the exposure height (5 5/8 inches for Cambridge, 5 3/4 for Dynasty) so the courses line up across old and new roof planes. We source OEM IKO ridge caps and matching starter strips through our distributor in Riviera Beach, and we keep CertainTeed and GAF equivalents on hand when the IKO color line has been discontinued - a reality on homes built during the 2012-2016 building surge in West Palm Beach.

Signs Your IKO Home Additions & ADU Is Failing

• Granule accumulation in gutters or downspout outlets. IKO’s ceramic-coated granules protect the asphalt mat from UV degradation; heavy shedding means the shingle is approaching end of life. In West Palm Beach, we see accelerated granule loss on south-facing slopes where afternoon sun pounds the roof for six hours straight.
• Curling or clawing at shingle edges, especially on the windward eave. This indicates the asphalt mat has dried and shrunk, losing its sealant bond. IKO’s ArmourZone sealant is aggressive when fresh, but after 12-15 years in Florida’s thermal cycling, the expansion and contraction fatigues the fiberglass core.
• Lifted or missing shingles after a routine thunderstorm. If shingles that were intact last year are now peeling back at 40 mph gusts, the self-seal strip has failed. This is common where original installation skipped hand-sealing in cold weather or where attic ventilation is insufficient and heat builds from below.
• Water staining on ceiling drywall at the addition tie-in or along the ADU valley. The leak may be 8-10 feet uphill from the stain. IKO’s synthetic underlayment (Stormtite or GoldShield) should prevent this even if the primary shingle is compromised; staining means the underlayment is either deteriorated or was never installed at the junction.
• Sagging or soft spots in the roof deck when walked during inspection. This is structural, not cosmetic. IKO shingles can hold water against the deck if drainage is poor, and in West Palm Beach’s humidity, OSB sheathing can delaminate in 3-4 years of chronic moisture exposure.

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Replacement Cost & What’s Included

The spread on full additions and ADUs comes down to three variables: square footage, whether we’re pouring new foundation or building on existing slab, and the finish level inside. A 400-square-foot studio ADU on a slab with IKO Cambridge roofing, mini-split HVAC, and basic finishes lands near the lower end; a 900-square-foot two-bedroom with full kitchen, impact windows, and IKO Dynasty roofing with extended warranties pushes toward $220,000. Every quote we write in West Palm Beach itemizes the IKO components by line - shingle series, underlayment grade, ridge vent linear feet, drip edge profile - so you see where the money goes before anyone picks up a hammer. Under Clause 1 of the Haven Standard, that written price is fixed; no change order, no change in cost.

DIY or Call Us?

There’s a clear line between what a homeowner can verify and what requires a licensed contractor with proper insurance and permit authority. You can safely walk the roof with binoculars to check for missing shingles, photograph the date code on an exposed shingle tab, and measure your addition footprint with a tape measure for rough budgeting. What you should not do: remove shingles to inspect underlayment, cut into the existing roof plane to test sheathing, or attempt to tie in a new roof section without pulling a permit - West Palm Beach requires a roofing permit for any work exceeding 100 square feet or any structural modification.

The real risk isn’t the fall, though that’s real enough on a 6/12 pitch in morning dew. It’s the latent defect - the leak that doesn’t show for six months, the valley that sheds water wrong, the insurance claim that gets denied because the work was unpermitted. We pull permits, schedule inspections, and pass them before we invoice. If you’re weighing a self-managed ADU against hiring out, call us at (561) 475-3903 for a written quote. The estimate is free, and we’ll show you the IKO spec sheet we’d use on your job.

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