Roof Flashing in Minnesota That Actually Keeps Water Out

Most water damage we see comes back to one thing: bad flashing. A shingle can look perfectly fine while a gap in the flashing behind your chimney lets water pour into your attic every rainstorm. We've seen it hundreds of times across Minnesota, and we fix it the right way the first time.

We're a residential roofing contractor, which means flashing isn't an afterthought for us. We don't use commissioned salespeople to talk you into services you don't need. You get a straight answer about what's failing, what it takes to fix it, and what it costs.

Minnesota winters are hard on flashing. Water gets into a small gap, freezes, expands, and makes the gap bigger. By spring, what started as a hairline crack can be a real leak. That cycle repeats every year, which is why flashing that was installed 10 or 15 years ago often needs attention even if the shingles still look okay. Our crews work through Minnesota's full range of conditions and choose flashing materials that hold up when temps drop hard.

Where Roof Flashing Fails Most Often

Chimneys are the biggest culprit. The junction between a masonry chimney and the roof deck moves slightly as temperatures change, and that movement breaks down old caulk and metal bends over time. Step flashing along dormers and sidewalls is another common failure point, especially on older Minnesota homes where the original installation may have cut corners.

Valleys — where two roof planes meet — also take a beating from Minnesota's heavy spring runoff. Water concentrates in those channels, and if the flashing underneath is thin or improperly lapped, it won't last. If you're also seeing wear on your shingles, it's worth pairing a flashing inspection with a full roof inspection so nothing gets missed.