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Tamko Home Additions & ADU: The West Palm Beach Owner’s Guide
Home additions and ADUs built with Tamko roofing and waterproofing products in West Palm Beach typically run $45,000 to $130,000 when we handle the full scope, and we can usually start within two to three weeks of the written estimate. The bigger cost variable is what’s already failed: a Tamko underlayment that’s torn or lifting around a dormer, flashing that’s separated at a roof-to-wall junction, or sheathing that’s gone soft behind the siding. Most owners don’t find the problem until water shows up on a ceiling or the building inspector flags the addition during a resale inspection.
We work on Tamko-specified additions and ADU envelopes all over West Palm Beach, from El Cid to the Northwood corridor. When a Tamko product fails on an addition, it’s rarely the shingle itself. It’s almost always the transition: where the new roofline ties into the original house, where the ADU wall meets the slab, or where a contractor skipped the peel-and-stick membrane to save a day. We fix those transitions correctly, which means we open them up, inspect what’s underneath, and rebuild them to spec.
Key Takeaways
- Installed home addition and ADU work in West Palm Beach: $45,000 – $130,000 depending on scope and what’s failed.
- We stock Tamko-compatible underlayments, flashing, and sealants on our trucks for same-day repair calls.
- Florida’s heat and hurricane-driven rain cycles mean Tamko products fail faster here than in northern climates if the substrate wasn’t prepped right.
- Every scope gets a written price before work starts. No numbers that move at the door.
Which Tamko Models This Applies To
Tamko makes a broad line of roofing shingles, underlayments, and waterproofing products, and most of what we see on West Palm Beach additions and ADUs falls into three categories: Heritage shingles, MetalWorks steel roofing, and TW underlayment series. The compatibility gotcha owners miss is that Tamko’s adhesive strip activates differently in Florida heat. If the shingles were installed in a cold snap or over damp sheathing, the seal never fully sets, and the first summer thunderstorm lifts edges you can’t see from the ground.
Identifying your exact product matters because Tamko changed their underlayment specs about six years back. Older 15-lb felt underlayments on additions built before the change don’t accept the newer peel-and-stick membranes the same way. We match the replacement underlayment to what’s actually on the roof, not what the box store has on the shelf. For OEM versus aftermarket: Tamko’s own TW Metal and Tile underlayment is worth the cost on low-slope addition roofs under 3:12 pitch. On steeper pitches, a quality aftermarket synthetic from Owens Corning or CertainTeed performs equally well and saves about 15 percent. We’ll show you both numbers and let you decide.
Styles & brands we work with
Signs Your Tamko Home Additions & ADU Is Failing
- Water staining at the addition’s ceiling or wall junction. This almost always means the roof-to-wall flashing was stepped wrong or the underlayment wasn’t lapped over the flashing. The water travels down the rafter and shows up three feet from the actual leak.
- Shingle edges lifting or curling on the addition roof. In West Palm Beach’s summer heat, an unsealed adhesive strip fails within one season. If half the roof looks flat and half looks lifted, the shingles weren’t set properly on install day.
- Peeling paint or swelling at the bottom of an ADU’s exterior wall. This tells us the waterproofing barrier behind the siding wasn’t brought down far enough to overlap the slab. Termite and moisture damage in that bottom plate is a $4,000 surprise if it’s caught late.
- A musty smell in the addition that comes and goes with rain. Trapped moisture behind the vapor barrier means the wall assembly isn’t drying out. Florida humidity pushes that moisture inward, and the smell is the first thing owners notice.
- Granules collecting in the gutters after every storm. Tamko shingles lose some granules as they age, but a thick layer in the gutter every month means the shingle is wearing out fast, usually because the attic ventilation wasn’t upgraded when the addition was built.
See the difference
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After
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AfterReplacement Cost & What’s Included
For a full Tamko-specified home addition or ADU in West Palm Beach, you’re looking at $45,000 to $130,000. A partial repair, like replacing the underlayment and flashing on a 400-square-foot addition roof, runs $3,500 to $8,000. The range depends on three things: how much of the existing structure has to be opened up, whether the sheathing underneath is salvageable, and what Tamko product line you’re matching.
Every estimate we write includes the parts, the labor, the dump fees, and the permit costs. You get one number, in writing, before anything starts. Curtis Lane and the crew don’t do change orders unless you ask for a change. If we open a wall and find rotted framing, we call you with photos and a price before we touch it. The 365-Day Done Right Promise covers every Tamko repair or addition we build: if the work fails within a year, we’re back to fix it at no charge.
DIY or Call Us?
You can safely check a few things on your own: look for lifted shingle edges from the ground, check for water stains on the ceiling, and look at whether your addition’s gutters are pulling away from the fascia. Those observations help us give you a faster phone estimate. But opening up a roof-to-wall junction or replacing underlayment on a steep addition roof is not a weekend project. One missed nail pattern on a peel-and-stick membrane and you’ve got a leak that rots the sheathing before you even see a stain.
If you’re on a ladder pulling shingles off a Tampa-style hip roof addition in July, you’re also one slip away from a hospital visit. We’d rather have you call us at (728) 203-9809 and let our crew handle it. The estimate is free, and the number you get is the number you pay.
FAQs
You should get 20 to 25 years from Tamko Heritage shingles in West Palm Beach’s climate, but only if the attic ventilation was upgraded when the addition was built. Poor ventilation cuts that lifespan to about 12 years. Call (728) 203-9809 and we’ll check the ventilation while we inspect the roof.
If the underlayment has torn or separated at a single flashing point, yes, we can cut out the damaged section and splice in new Tamko TW underlayment with the proper overlap. If the tear runs more than a few feet or the decking below is soft, a full replacement makes more sense. We’ll show you the condition and let you make the call.
A flashing and underlayment repair on a typical West Palm Beach addition takes one to two days. A full re-roof of an ADU takes three to five days depending on the pitch and the tear-off. We set the schedule when we write the estimate, and it doesn’t slip without a phone call first.
Yes. Our trucks carry Tamko TW underlayment, Tamko flashing, and Tamko sealants, so most repair calls don’t wait on a supply house order. For full reroofs, we pull from our supplier network in West Palm Beach and have materials staged before the crew arrives. Call (728) 203-9809 for a free estimate and we’ll tell you what’s in stock for your job.
If you have a Tamko addition or ADU in West Palm Beach that’s showing signs of failure, call us at (728) 203-9809. We’ll schedule a free inspection, give you a straight number in writing, and fix it right the first time. Straight number, full scope, no surprises after the invoice.
Written by Curtis Lane, Owner, Bradford Remodeling Co – West Palm Beach at Bradford Remodeling Co West Palm Beach, serving West Palm Beach and nearby areas.
