Tamko Underlayment & Deck Repair Nationwide

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

Tamko underlayment and deck repair in Pasadena typically runs $450 to $1,900 installed, depending on how much decking has rotted and which Tamko underlayment product your roof uses. We stock Tamko-compatible underlayment on our trucks and can match most models same-week. Most Pasadena homeowners discover the failure after a leak shows up on a ceiling or during a re-roof when the old shingles come off and the deck looks like Swiss cheese.

Call (626) 389-1956

You called us because you already know the product name. That’s a good starting point. What matters now is which Tamko underlayment your roof has, what failed, and whether the deck sheathing underneath needs to be cut out and replaced before new underlayment goes down. We’ll walk you through exactly what we look for when we do this work across Pasadena, from the bungalow roofs in Madison Heights to the newer builds up in Hastings Ranch.

Key takeaways:

• Tamko underlayment failures are almost always a symptom of water getting past the top layer, not the underlayment spontaneously failing
• Deck repair is priced per 4×8 sheet replaced, and Pasadena’s older homes often need more sheets than the homeowner expects
• We give you a written price before any work starts, and every repair is covered for 365 days

Which Tamko Models This Applies To

Tamko makes two underlayment lines you’re likely to find on Pasadena roofs: Tamko TW Metal and Tile Underlayment, and their synthetic underlayment products like Apex. The TW line is a heavyweight felt designed for metal and tile roofs, and it’s common on Pasadena’s Spanish-style and Mediterranean homes. Apex is the newer synthetic option, and we see it on homes re-roofed in the last ten years.

Identifying what you have before we arrive helps. The easiest way is to check the roof paperwork from the last replacement. If that’s gone, we can usually identify the underlayment type once shingles or tiles are lifted. For deck repair, the question isn’t which Tamko product you have. It’s how much of the plywood or OSB underneath has water damage. Pasadena roofs from the 1920s through the 1960s often have 1×6 or 1×8 spaced sheathing instead of solid plywood, which changes the repair approach and the per-sheet math.

One compatibility note that surprises homeowners: you don’t need to replace Tamko underlayment with Tamko underlayment. The underlayment isn’t visible, isn’t a warranty pair with the shingle brand, and a high-quality synthetic equivalent often outperforms the original felt. We install manufacturer-backed materials from Tamko, GAF, Owens Corning, and CertainTeed, and I’ll tell you plainly when a different brand is the better value can’t lie: if the existing felt did its twenty years, you already got what you paid for.

Signs Your Tamko Underlayment & Deck Repair Is Failing

• Water stains on ceilings or walls – this is the one that gets the call. By the time water shows up inside, the underlayment has already failed and the decking underneath is usually wet too. One stain on a Pasadena living room ceiling often means three or four sheets of decking need to be checked.
• Granules collecting in gutters or on the driveway – aging shingles shed granules, and those granules were protecting the underlayment. When the shingle surface is spent, the underlayment becomes the only barrier, and it was never designed to be the first line of defense.
• Wavy or sagging rooflines when viewed from the street – this means the decking has absorbed enough moisture to lose structural strength. On Pasadena’s craftsman homes with shallow roof pitches, you can see this from the sidewalk if you know what you’re looking for.
• Soft spots felt when walking the roof – decking that gives underfoot has already started to rot. We don’t recommend homeowners walk their own roofs to test this. Call us instead. But if you’ve been up there already and felt spongy plywood, that’s a deck replacement, not a patch.
• Mold or mildew smell in the attic – trapped moisture above the decking eventually becomes trapped moisture below it. A musty attic on an older Pasadena home with original decking usually means we’re replacing sheathing, not just laying new underlayment.

Replacement Cost & What’s Included

In Pasadena, you’re looking at these ranges:

• Underlayment replacement only (no decking work): $450 to $900 for a typical single-story section, including tear-off of the old felt, new synthetic underlayment, and fasteners
• Deck repair, 1-3 sheets (4×8 plywood or OSB): $800 to $1,500 including materials, labor, and disposal of the rotted sheathing
• Full roof deck replacement on a small Pasadena bungalow: $1,900 and up, depending on total square footage and whether we’re working on spaced sheathing or solid plywood

What moves the number is how much of the decking has to be cut out, whether the rafters need inspection, and whether the old underlayment comes up cleanly or fights us the whole way. You get a written price before we start, with the labor and materials separated so you can see exactly what you’re paying for. That price is the price on the invoice. Every repair is covered by our 365-Day Done Right Promise, in writing, included with every job at no extra cost.

DIY or Call Us?

Underlayment and deck repair is not a safe DIY job on any roof with more than a 4/12 pitch. The work involves lifting shingles or tile, cutting out rotted sheathing with a circular saw, and working at height with tools. A fall from a Pasadena roof is a hospital visit you don’t schedule. That said, there are things any homeowner can check without getting on a ladder: note where the water stains are inside the house, check the gutters for granule buildup, and look at the roofline from the street. That information helps us give you a better estimate over the phone.

The part where DIY goes wrong is seam sealing. The underlayment’s only job is to shed water, and a seam that isn’t lapped and fastened correctly becomes a leak the next wet season. If you want this done once, call us at (626) 389-1956. Dylan Pace and our crews have done this exact repair on more Pasadena roofs than we can count, and you’ll know the price before we start and see photos of the work when we’re done.

FAQs

Get Your Tamko Underlayment & Deck Repair Priced in Writing

You don’t need another opinion, just a number. Call Crestview Roofing Co Pasadena at (626) 389-1956 and we’ll schedule a time to look at your roof, tell you exactly what’s failed, and send you a written price before any work starts. No four-hour windows, no number that changes at the door, no surprises after the job. Get it in writing, then get it done right.

Written by Dylan Pace, Owner, Crestview Roofing Co Pasadena at Crestview Roofing Co Pasadena, serving Pasadena and nearby areas.