Goffstown, NH Roof Replacement Using GAF Timberline HDZ Shingles in Barkwood

What did this Goffstown homeowner start with?

The existing roof had reached the end of its service life. Granule loss was visible from the ground, the shingles had become brittle and were losing their weather-resistance, and the homeowner had been watching it decline for a couple of seasons. The question was not whether to replace it — that was clear — but what to put on. After reviewing options, they chose GAF Timberline® HDZ® shingles in Barkwood.

What makes GAF Timberline HDZ different from a standard architectural shingle?

GAF Timberline® HDZ® shingles are built around several technologies that go beyond what a basic architectural shingle offers:

• LayerLock™ Technology — a factory-applied adhesive that bonds the headlap tabs during installation, creating a four-nail fastening system with dramatically improved wind resistance. GAF rates Timberline HDZ at 130 mph when installed correctly, which is relevant for a Southern New Hampshire home that sees genuine winter storm conditions.
• Dimensional shadow line — the HDZ profile creates a deeper, more contoured look on the roof than a standard laminate shingle, adding genuine visual depth rather than just pattern variation
• Time-Release algae protection built into the granule coating — keeps the roof looking clean longer in New Hampshire’s damp climate

Why Barkwood for this home?

Barkwood is a warm, multi-tonal brown blend with enough variation in the granule mix to give the roof real depth. It works particularly well on homes with natural wood accents, earthy brick, or neutral-toned siding. On this Goffstown home, the Barkwood color gave the roof a rich, natural aesthetic that felt appropriate to the property rather than imposed on it — a significant upgrade from the worn-out shingles that came off.

What did the tear-off and deck inspection find?

Our process on every replacement is to do a thorough tear-off and deck inspection before any new material goes on. On this project:

• The full existing system was stripped to the bare deck
• Every section of decking was inspected for soft spots, rot, delamination, or structural compromise
• Any areas that did not meet the standard for a solid substrate were replaced

It is an unglamorous step, and it adds time and material cost when problems are found. But installing a premium shingle system over compromised decking shortens the life of everything above it — so fixing the deck is not optional if the goal is a roof that lasts.

What underlayment and protection was used?

After the deck was prepared, we installed a premium underlayment and ice protection system before the shingles went on. This included ice and water protection in the vulnerable zones — eaves, valleys, and around penetrations — and synthetic underlayment across the field. Every plumbing penetration was addressed with properly sealed flashing and boots.

Roof replacement in Goffstown, NH

The combination of GAF’s LayerLock™ wind resistance and a fully prepared, properly waterproofed deck means this Goffstown home has a roof built to handle New Hampshire’s seasons for decades. If your home needs a similar upgrade, see the Goffstown service area page or read about our roof replacement services. Call 603-219-1523 for a free estimate.