CertainTeed Underlayment & Deck Repair in Las Vegas, NV

CertainTeed Underlayment & Deck Repair: The Las Vegas Owner’s Guide

We stock and install CertainTeed-compatible underlayment and deck repair in Las Vegas, with most jobs running $380-$780 installed depending on square footage and deck condition. Same-day service is available when you call before noon, and we carry DiamondDeck and WinterGuard on every truck. Most homeowners discover the problem after a rain - water stains on the ceiling that trace back to underlayment that’s curled, torn, or never sealed right at the valleys and penetrations.

Call (866) 993-9765

Which CertainTeed Models This Applies To

CertainTeed’s underlayment systems pair with their shingle lines - Landmark, Landmark Pro, NorthGate, and Presidential Shake - but the underlayment itself is where the failure usually hides. We see this most on homes built during the 2004-2012 boom, when builders in Summerlin and Henderson often used the lightest-weight felt or skipped ice-and-water shield entirely because “it doesn’t freeze here.” That was a mistake. Desert UV degrades exposed underlayment in 18-24 months once shingles lift or tile channels crack.

To identify what you’ve got, we look for the CertainTeed batch stamp on any remaining shingle bundles in the garage, or we pull a shingle at the eave to read the underlayment label. DiamondDeck is a synthetic, gray, and marked with the CertainTeed logo every 24 inches. WinterGuard is the self-adhering membrane, sand-colored on the back, sticky on the face. For deck repair, we’re matching plywood thickness - usually 7/16″ on truss roofs common in Las Vegas, 5/8″ on older stick-framed homes near Charleston Heights. We use only CertainTeed-specified equivalents or OEM; generic felt at 15 lb. is not a suitable substitute under their warranty terms, and we won’t install it.

Ridgeline Roofing Co. of Las Vegas is an independent service provider, not affiliated with CertainTeed.

Signs Your CertainTeed Underlayment & Deck Repair Is Failing

• Water stains on ceiling drywall, especially near valleys or vent pipes. The underlayment has torn or the self-adhered membrane has lost its seal. In Las Vegas, thermal cycling - 40°F swings in a single day, common in spring and fall - causes the deck to expand and contract, shearing underlayment at fasteners and penetrations.
• Shingle edges curling up or tabs breaking off in wind under 50 mph. This usually means the deck beneath has softened from moisture intrusion. Once plywood delaminates, it loses hold on fasteners and the shingle tab has nothing to grip.
• Sagging between rafters visible from the attic. The deck has taken on moisture and is losing structural integrity. We see this in older Las Vegas homes with original 3-tab shingles and no ventilation - attic temperatures hit 160°F in July, cooking the glue in plywood and accelerating decay.
• Granules collecting in gutters but shingles look intact from the ground. The underlayment may be trapping moisture against the deck, causing the shingle backer to degrade prematurely. This is common where WinterGuard was installed too far up the slope, creating a vapor barrier in the wrong place.
• Musty smell in attic or insulation discoloration. Slow leaks through compromised underlayment don’t always show on the ceiling right away. They saturate insulation first. In Las Vegas, that trapped moisture turns to mold fast once the AC kicks on and cools the attic air.

Replacement Cost & What’s Included

What drives the range: how much deck we can access without removing full shingle courses, whether the original nails were ring-shank (easier removal, less deck damage) or smooth (more tear-out), and how many layers of old material we’re working through. We quote upfront - the number on the estimate is the number on the invoice. Every underlayment and deck repair job carries our 90-Day Done Right Promise: if it’s not right, we come back and make it right, no paperwork, no arguing.

DIY or Call Us?

There’s a safe middle ground here. A homeowner can check the attic for stains, note where water tracks, and even photograph curled shingles from the ground with a zoom lens. What we don’t recommend: pulling shingles to inspect underlayment, walking a pitched roof to check deck flex, or cutting into soffits to trace leaks. The deck repair itself involves working at height on compromised structure, and the underlayment installation requires proper overlap sequencing - get the valley wrong, and you’ve built a funnel instead of a watershed.

We carry DiamondDeck and WinterGuard on every truck, and most underlayment and deck repairs in Las Vegas finish in a single visit. Call (866) 993-9765 and a live person will answer, 24/7. We’ll get a technician out, photo-document what we find, and give you a written estimate before any work starts.

FAQs