IKO Home Additions & ADU in Las Vegas, NV

IKO Home Additions & ADU: The Las Vegas Owner’s Guide

IKO-compatible home additions and ADU construction in Las Vegas typically runs $45,000-$130,000 for standard additions and $90,000-$220,000 for full ADU builds, with most projects starting within 2-4 weeks of contract signing. We stock IKO roofing components and structural materials common to Las Vegas additions, and our crews can assess your existing IKO system same-day. Most Las Vegas homeowners discover their IKO addition needs attention when they spot water staining on new drywall, feel hot spots where the roof deck meets the original structure, or notice the addition has settled differently than the main house after a monsoon season.

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Which IKO Models This Applies To

IKO doesn’t manufacture complete home addition or ADU structural systems, but their roofing, waterproofing, and insulation products appear frequently on Las Vegas additions built between 1995 and today. We regularly work with IKO Cambridge Architectural shingles, IKO Dynasty performance shingles, and IKO StormShield ice and water protector on addition tie-ins throughout Summerlin, Henderson, and the northwest valley.

To identify what you’ve got, check the shingle bundle wrappers if any were left behind, or look for the IKO stamp on the shingle backside during an attic inspection. The Cambridge line runs a standard 40 7/8 inches per shingle with a 5 7/8-inch exposure, while Dynasty shingles are slightly heavier at 310 lbs per square and carry a Class 4 impact rating that matters in hail-prone pockets of the valley. For the waterproofing layer, IKO StormShield comes in 36-inch rolls versus the 48-inch rolls some competitors use, which affects how we lap it at the critical junction where your addition roof meets the existing structure.

OEM IKO components match color lots and warranty terms exactly. Quality aftermarket equivalents exist for underlayment and fasteners, but we specify IKO shingles on the IKO system to keep the manufacturer’s limited warranty intact. Mixing brands on the same roof plane voids most coverage.

Signs Your IKO Home Additions & ADU Is Failing

• Water stains on ceiling drywall inside the addition. The tie-in flashing between your existing roof and the new IKO roof is the most common leak point on Las Vegas additions. Heat cycling from 115°F summer days to 40°F winter nights cracks sealant faster here than in milder climates.
• Shingle granules collecting in gutters or downspout outlets. IKO shingles losing granules prematurely often signal either a manufacturing batch issue or that the attic ventilation in your addition was undersized. In Las Vegas, inadequate ventilation can cook shingles from underneath and cut their service life by half.
• The addition floor feels sloped or doors won’t latch. This usually points to foundation settlement, but on IKO-roofed additions with shallow crawl spaces, it can also mean moisture intrusion rotting the rim joist. We see this combo failure in older Paradise and east Las Vegas additions where drainage was never properly addressed.
• Hot spots or cold drafts along the addition wall-ceiling junction. IKO’s insulation products perform well when installed to spec, but gaps at the top plate or missed spray foam in the critical transition zone leak conditioned air year-round. Your HVAC bill tells the story before your eyes do.
• Visible waviness or buckling in the IKO shingle field. This can be improper nailing pattern, but in Las Vegas it’s often trapped moisture from a leak that started small at the chimney or vent penetration and migrated. The low humidity here actually delays obvious mold growth, so the damage spreads further before you notice.

Replacement Cost & What’s Included

What drives the range: square footage, whether we’re pouring new foundation or building on existing slab, and how much of the original IKO system can be preserved versus replaced. Every estimate we provide breaks out materials, labor, permits, and the 730-Day Done Right Promise in writing. No hidden line items, no surprise change orders. The number you see is the number you pay.

All IKO component work carries our full workmanship guarantee. If a tie-in leaks or a detail fails, we make it right. Period.

DIY or Call Us?

There’s a short list of things a Las Vegas homeowner can safely check on their own. Walk the interior with a flashlight and note any stains, soft drywall, or gaps at trim. From outside with binoculars, look for missing shingles, lifted flashing, or debris buildup in valleys. That’s about where DIY ends for this category.

The actual work involves structural load transfer, proper waterproofing at the marriage line between old and new construction, and code-compliant electrical and HVAC integration. Las Vegas building codes require permits for any structural modification, and the city inspectors know exactly what to look for at addition tie-ins. We’ve been called in after DIY attempts where the homeowner saved $3,000 on labor and spent $12,000 fixing water damage, termite intrusion, and a failed inspection cycle.

Our crews are background-checked, uniformed, and carry the full IKO-compatible material inventory on every truck. Most assessments take under an hour. Call (855) 951-4361 and a live person will pick up, 24/7.

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