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Some roofs leak because of one bad spot. Others are simply built in a way that gives water dozens of chances to get in. The home we replaced in Johnstown, PA was firmly the second kind — a moderately sized roof carved into nine facets and stitched together with an extraordinary number of valleys. A roofline like this rewards experience and careful waterproofing, which is exactly what our Altoona-area roofing team brought to the project. The goal wasn't just a new roof; it was a roof engineered to keep water out at every one of its many seams.
This roof had roughly forty feet of valleys threading across it — an unusually high amount for its size. Valleys are where two slopes meet and dump their combined runoff into a single channel, which makes them the busiest and most leak-prone part of any roof. On a roof with this many of them, ordinary shingle coverage alone isn't enough. Every valley becomes a place where careful membrane work and precise cutting either keep the home dry for decades or let it down in the first heavy storm. A detailed roof inspection up front let us map every one of them before the tear-off began.
The centerpiece of this shingle roof replacement was an aggressive waterproofing strategy. Rather than limit the waterproof membrane to just the eaves, our crew laid ice-and-water shield across a large share of the deck — through all the valleys, at the low-slope areas, around every penetration, and along the eaves:
The home's chimney posed its own challenge. On the up-slope side of a wide chimney, water tends to pool and work its way behind the flashing — a classic leak source. To prevent it, our crew built a cricket: a small peaked structure behind the chimney that diverts water cleanly around both sides. Paired with new cut-in counter flashing where the roof meets the masonry, it turns one of the roof's most vulnerable spots into a non-issue.
A new roof should breathe as well as it sheds water. We combined continuous ridge venting with static vents to exhaust hot, moist attic air, helping the new shingles last longer and guarding against attic moisture through Pennsylvania's cold winters and humid summers. It's the kind of detail that doesn't show from the street but makes a lasting difference.
This replacement is protected by our 25-year Cenguard Gold warranty, covering both workmanship and material defects and transferable if the home changes hands within five years. As always, there's no deposit and no payment until the job is complete, with Service Finance financing available. It's the thorough, honest work our Pennsylvania roofing crews deliver on every home.
If your roof has a complicated, valley-heavy design — or a chimney that's given you trouble — our Altoona-area team knows how to protect it. Schedule your free roofing estimate today and get a roof built to stay dry.
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