Tamko Underlayment & Deck Repair in Chicago, IL

Tamko Underlayment & Deck Repair: The Chicago Owner’s Guide

Tamko underlayment and deck repair in Chicago typically runs $340-$780 installed, depending on how much decking has rotted through and whether we’re matching existing Tamko Heritage or Titan XT shingle lines. We stock Tamko-compatible underlayment on every truck and can usually complete the repair same day you call. Most homeowners discover the problem after a hard rain - water spots on the ceiling, a sagging section of roofline, or shingles that look fine from the street but have nothing solid underneath them.

Call (855) 641-3418

Which Tamko Models This Applies To

This repair applies across Tamko’s residential shingle lines installed in the Chicago market over the past three decades: Heritage, Heritage Vintage, Heritage IR, Titan XT, and the older Elite Glass-Seal laminates still found on many bungalows in neighborhoods like Portage Park and Berwyn. The key identifier is the shingle bundle label, which lists the underlayment specification - Tamko typically calls for ASTM D226 Type II felt or self-adhering ice-and-water shield at the eaves, with deck repair following local code for solid sheathing.

Here’s where owners get tripped up. Tamko’s warranty documentation specifies minimum 3/8-inch plywood or 7/16-inch OSB decking beneath their shingles. We’ve pulled up plenty of Chicago roofs where a previous installer cheaped out with 5/16-inch or left damaged decking in place, and the homeowner only finds out when the ceiling starts dripping. OEM Tamko underlayment isn’t required to maintain warranty coverage, but the material must meet the same ASTM specs. We carry both Tamko-branded rolls and equivalent-grade alternatives from the same mills - your call, and we’ll show you the difference before we cut anything.

Ridgeline Roofing Co. of Chicago is an independent service provider. We are not affiliated with Tamko Building Products, though we are an authorized installer and stock genuine Tamko materials.

Signs Your Tamko Underlayment & Deck Repair Is Failing

• Water stains on the ceiling that grow after every rain. This usually means the underlayment has torn or the ice-and-water shield failed at a valley or penetration, letting water reach the decking. In Chicago, we see this most often where freeze-thaw cycles have lifted the seal around vent pipes.
• A soft or spongy feel when walking the roof. The decking beneath the shingles has delaminated or rotted. On older Chicago two-flats, we’ve found original pine plank decking that’s turned to pulp where bathroom vents dump moisture for years.
• Shingles curling or buckling in a straight-line pattern. This follows the seam of compromised underlayment underneath. The shingles aren’t the problem - they’re reacting to movement in the deck below.
• Granule loss concentrated in one area. When decking flexes, shingles rub and shed granules prematurely. We’ve mapped this exact pattern on a 2012 Heritage roof in Oak Park where a single sheet of OSB had failed.
• Daylight visible from the attic during the day. The decking gap has opened wide enough to see through, which means water, snow, and pests have a clear path. We found this last winter on a bungalow near Midway where squirrels had enlarged a small rot hole into a three-inch gap.

Replacement Cost & What’s Included

What drives the range: how much decking needs replacement, whether we can match your existing Tamko shingle color from stock or need to special-order, and how many layers of old roofing we’re working through. Chicago’s 2021 building code amendments require ice-and-water shield on all eaves extending 24 inches inside the exterior wall line - older installations often fall short of this, and we flag it during inspection. The price we quote is the price you pay. Every repair carries our 90-Day Done Right Promise: if it’s not right, we 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 water stains, measure soft spots from below with a screwdriver handle, and photograph shingle damage for reference. What you should not do: tear into the decking yourself. Roof decking sits at height, on a slope, often with compromised structural integrity exactly where you’re about to step. The fall risk is real, and so is the risk of turning a $400 repair into a $2,000 problem by exposing the wrong section before a storm hits.

We bring background-checked, uniformed technicians who document every step with photos from your actual roof - not a sales pitch in the driveway. Most Tamko underlayment and deck repairs finish in a single visit. If you’re seeing any of the signs above, call (855) 641-3418 and a live person will answer, day or night. We’ll get you scheduled and give you an upfront price before we start.

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