1995 Holliston Colonial Roof Replacement with GAF Timberline UHDZ

Not every roof replacement starts with a leak. This Holliston Colonial was built in 1995, and as far as anyone could tell, it still had a 3-tab roof from that era. If the shingles were original, they had been up for close to 30 years - longer than most 3-tab shingles are designed to last. When Master Roof first walked the roof in 2024, we gave the homeowners an honest answer: it was getting old, but it didn’t need to come off right away. Two years later, a follow-up inspection told a different story. The 3-tab shingles had lost much of their granule coating, the ridge caps were held together with patches of sealant, and the small problems we had flagged before were starting to add up.

This time the homeowners were ready - and rather than simply swapping like for like, they chose to upgrade. The result is a full GAF Timberline UHDZ system that changed the way the whole house looks from the street.

Roofing Project Specifications

What the Master Roof Inspection Found

Our expert estimator, Paul Valdez, documented the roof from end to end - field, ridges, valleys, chimney, sidewalls, and attic. None of it was an emergency on its own. Together, it described what a roof looks like after three decades of New England weather - a roof at the end of its service life:

• Granule loss across the field: Large areas of the 3-tab shingles had shed their protective granules, leaving the dark asphalt and fiberglass mat underneath exposed. When those black spots outnumber the granules, a shingle is deteriorating.
• Streaking and old algae staining: Dark patches where moss and algae had grown in the past, stripping granules as they went.
• Cracked, broken, and previously repaired shingles: Several broken tabs, a small amount of damage near the eaves, and visible evidence of earlier spot repairs.
• Worn and patched ridge caps: The caps - the most weather-exposed shingles on any roof - had cracked corners, lifting edges, and blobs of sealant where earlier patches had been made. Ridge nails were starting to back out.
• Exposed nails: Unsealed fastener heads on the roof surface, each one a potential micro-leak.
• Aged chimney flashing: Weathered metal flashing at the brick chimney, past the point where resealing makes sense.
• Sidewall flashing: Where the lower roofs meet the siding, the flashing needed to be replaced so every shingle course could get its own step flashing.
• Roof penetrations: The plumbing vent boot and the flashing around the bathroom exhaust vents were due for replacement. Bathroom fans should always vent through the roof with properly flashed caps, never into the soffit.
  

Why the Homeowners Went Premium

When the roof coming off may have lasted 30 years, the one going on is one the homeowners will live with for decades — so it is worth getting right. And a two-story Colonial puts its roof on full display. From the street, the main roof is the largest single surface on the house - and a flat, faded 3-tab roof was doing nothing for this home’s tan siding, crisp white trim, and black shutters.

GAF Timberline UHDZ is GAF’s top-of-the-line Timberline shingle. Compared with the popular Timberline HDZ, it is thicker and noticeably heavier, and GAF’s Dual Shadow Line technology lays down two parallel shadow lines on every shingle for a deeper, ultra-dimensional wood-shake look. It is also backed by GAF’s StainGuard Plus PRO limited warranty against blue-green algae discoloration - a meaningful upgrade on a wooded lot where the old roof had already shown algae staining.

Premium shingles only perform as well as the system under them, so we specified a full matched GAF system rather than mixing brands.

The Master Roof Solution

• Complete tear-off: The old 3-tab shingles, underlayment, and flashing were removed down to the roof deck, and the deck was inspected before anything new went on.
• GAF StormGuard leak barrier: A self-adhering, ice-and-water leak barrier was installed along the eaves and in the valleys — the places where Massachusetts ice dams and wind-driven rain do their damage.
• GAF Deck-Armor underlayment: GAF’s premium breathable roof deck protection covers the rest of the deck. It sheds water like a synthetic underlayment should, while letting moisture vapor escape from the deck instead of trapping it.
• GAF Timberline UHDZ shingles: Installed to GAF specification across the main roof, the side wing, the dormer, and the front gable.
• Premium ridge caps: Double-layer ridge caps, hand-nailed with ring-shank nails, replace the patched caps that had been failing.
• New flashing everywhere: New flashing at the bathroom exhaust vents, step flashing woven into every shingle course at the sidewalls, and the chimney rebuilt in three layers — ice-and-water membrane wrapped up the brick, step flashing with lead at the corners, and new counter flashing over the top.
• Lifetime-rated pipe boot: The plumbing vent got an Ultimate pipe boot built to last as long as the new roof, instead of a standard rubber boot that cracks in the sun.
• Property protection: Tarps went down across the landscaping, front walkway, and rear deck before the first shingle came off.
  

The Result

Compare the before and after photos and the difference is obvious from the curb. The old roof read as a flat gray plane; the Timberline UHDZ roof has real depth and shadow, and its deep, rich color now anchors the tan siding and white trim instead of washing out against them. The dormer, the gables, and the long main roof all read as one crisp, finished design - exactly the kind of transformation premium shingles are made for.

Under the surface, the homeowners have what matters just as much: a complete GAF system with proper leak barrier, breathable deck protection, new flashing at every penetration and wall, and ridge caps built for the most exposed part of the roof. They replaced their roof on their own schedule - not in the middle of an emergency.