Something is wet, and the roof is getting the blame. Start by finding out whether it deserves it.

Winter drips come from four places, and only two of them are a hole in the roof.

If a roof has a valley and a leak, the valley is the first place to look. It is doing several times the work of the slope beside it.

The first hour is about limiting damage and gathering evidence, not about fixing the roof. Almost nothing useful happens up there in the rain.

Knowing what makes the colour tells you how the water arrived, how long it has been going on, and whether there is any water involved at all.

By the time a ceiling is wet there are two separate jobs: stop the water, and deal with what the water already soaked. They are not the same job, and they are rarely the same trade.

This is the most misdiagnosed problem in the whole subject, and the one where a roofer can honestly find nothing wrong.

The gap between where water gets in and where it shows up is the whole problem. Close that gap from inside, and you stop paying for repairs aimed at the wrong part of the roof.

A bulge or sag is a warning. Stay out from under it first, then work out whether the cause is water or framing.

A stain tells you something happened. A drip is happening now, and that makes it far more useful. As long as you watch it before you mop it up.

A stain is a record of an event. Read it properly and you know whether you are looking at history or at something still happening.

Asphalt shingles age visibly, and the particular way yours are ageing tells you roughly where you are in the roof's life.

The honest answer depends on where the gap is, how many there are, and what the rest of the roof is doing. None of that requires going up.

Base flashing is the piece that runs up the wall and under the shingles. When it fails, water goes straight into the roof edge.

Cap flashing is the metal hood that keeps water from running behind the flashing below it. It is easy to overlook and common to fail.

Sealant on the top of a chimney is a patch for small cracks. If the surface under it is crumbling, the sealant only hides the problem.

It is not the same part as a chimney cap, and it is not the same part as a crown. A failing chase cover produces a very specific symptom: water inside the house with no obvious leak outside.

A cricket is the one chimney detail most homeowners have never heard of. Until debris starts piling up behind their chimney every single autumn.

The crown is the slab on top of the whole chimney stack, not the flashing at its base and not the small cap over the flue. It fails in its own way, and the trade that fixes it is not roofing.

A bead of sealant along chimney flashing can buy time. It rarely fixes why the joint opened up.

Waterproofing a chimney means four different parts all doing their job, not one coat of sealer.

The order of the layers matters more than the metal. Here is how drip edge goes in and how to judge the result from the ground.

A leak that only shows up in certain storms, or that keeps returning after a patch, is usually not the shingles. It is a joint.

Not every flashing problem is a small one. Here is how to tell a reseal will not be enough.

Fixing flashing means standing on a sloped roof beside a wall or chimney. We cover how to find the problem and brief a roofer, not the repair.

Installing flashing means working on a sloped roof with shingles lifted. We explain how it should be built so you can judge the work, not copy it.

Lead is soft enough to be shaped tight to brick and tough enough to last for decades. It still fails, and the failures are easy to spot from the yard.

The valley on your roof was built one of three ways, and that single decision decides what a leak looks like from the ground, years later.

Getting new flashing is not only a materials question. How the job is done matters as much as what it is made of.

A chimney is the most complicated thing on a roof, and it has four independent ways of letting water in.

Transition flashing covers the joint where one roof surface hands water to another. If it fails, the stain shows up far from the cause.

Water on the glass is usually humidity, not a leak. A few checks will tell you which.

The glass rarely leaks. The metal around it does. Here is how skylight flashing works and how to check it without going on the roof.

Skylights get blamed for water that arrived somewhere else entirely, and about half the time nothing has leaked.

This is one of the most common defects a home inspector finds, and it hides in plain sight: a single missing piece of bent metal, four inches wide.

The sides of a chimney are sealed with a staircase of small metal pieces. When one lifts or rusts, water finds the gap.

Most roofs use five or six kinds of flashing. Knowing the names helps you read a quote and find where a leak really starts.

Valley flashing carries more water than any other joint on the roof, so it fails early.

Rain falling straight down the flue is only one explanation. Most of the time the water arrived another way.

A roof jack is a small part with a big job: sealing the spot where a pipe pokes through your roof.

A solar tube brings daylight through the roof without a big skylight. It also adds a hole to the roof, so it is worth knowing how it is sealed.

Chimney flashing is the layered metal that keeps rain out where masonry meets the roof. Most chimney leaks start here, not in the bricks.

Counter flashing is the cover that keeps water from running behind the lower flashing. When it fails, the leak looks like a roof problem.

Flashing on a roof is the metal that keeps water out where the shingles stop.

Step flashing is the row of small metal pieces that keeps water out where a sloped roof runs into a wall. One missing piece can leak for years.

An air handler in the attic makes water all summer. When that water stops draining, it ends up in the insulation and then on your ceiling.

The roof is not failing. The house is exhaling into it, and the attic cannot get rid of what arrives.

By the time an attic shows visible condensation or frost, the humidity that caused it has usually been building for a while. Checking the number directly catches the problem earlier than waiting to see it on the wood.

We can tell you where to look and what the pattern means. We cannot tell you what it is, and neither can anyone else from a photograph.

Most people go into the attic once a year, if that, so everything they find looks equally alarming. It usually is not. There are really only a handful of things that go wrong up there, and a flashlight and ten minutes are enough to sort them.

A duct is supposed to carry air outside the building. When one stops short in the attic instead, everything it carries (moisture, and with a dryer, lint) is dumped straight into the coldest, least ventilated part of the house.

The facing is not decoration. Put it on the wrong side, or in the wrong layer, and it can hold moisture where you do not want it.

Water cannot freeze into frost unless it arrived as vapor first. Finding it on the underside of the roof is the cleanest proof this site can offer that the roof itself is not the source.

A cold roof keeps the deck cold with moving air. A hot roof keeps it warm with insulation against the deck. Mixing the two is where the damp starts.

Dark patches on the plywood above your head are a sign of damp, not a verdict. The useful question is where the moisture comes from.

The smell is a clue to moisture, not a diagnosis. Here is how to follow it to the source.

Wood only rots when it stays wet for a long time. The rafter is the evidence; the water source is the problem.

A dusting of snow on the insulation looks alarming. Most of the time it is wind-driven powder that found a vent, and the real problem is the melt water.

A vapor barrier belongs on the warm side of the insulation. Adding one on top, or in a hot humid climate, can do harm.

The attic is a better vantage point than the ceiling below it. Where the water sits and when it appeared usually tell you more than trying to trace a stain back to a hole.

Insulation does not get wet on its own. Where the wetness is concentrated tells you what put it there, and that matters more than how bad it looks.

Insulation does not stop moisture. It changes how warm your ceiling is, and that decides what happens to the roof deck above it.

Insulation slows heat. It does almost nothing to stop air. If warm indoor air is still rising into the attic through the ceiling, everything you add on top is working against a supply line that was never cut.

The best view of your roof is from underneath. Stains, frost and daylight in the attic tell you more than a look at the shingles ever will.

The cheapest part in the whole ventilation circuit is also the one most often left out. And when it is missing, adding insulation makes the attic worse instead of better.

An edge vent is an intake, not an exhaust. It only works if the air it lets in has a clear path up the slope, and that is the part most houses are missing.

Two exhaust openings in the same attic do not add up. They compete: and the part of the roof that loses is the part where ice dams start.

A vent is mostly not a hole. Louvers, flanges and insect screen take up most of the opening. So the number that counts is the one the manufacturer publishes in square inches: and it is always smaller than the thing you are looking at.

Attic ventilation is the mechanism behind two expensive problems, and it fails in one predictable way.

Heat moves three ways. Insulation slows one of them, air sealing stops another, and a radiant barrier handles the third: downward radiation off a sun-baked roof deck. Buy it in that order and it helps. Buy it first and you have bought the least useful item on the list.

Everything above the eaves depends on an opening most owners have never looked at. When it fails, the attic takes its air from your house instead.

Most fixes target the ice. The one that lasts targets the heat escaping into your attic.

A downspout that will not drain is a clue about the gutter above it. Read it from the ground and let it thaw.

A heat cable treats the ice, not the cause. Here is when it helps and when it is a distraction.

It is a good backup layer. It is not a cure for the heat loss that builds ice dams.

Separate what stops the water this week from what stops the dam this winter and every winter after.

The roof is usually sound. Melt water is backing up under the shingles and finding a way in.

The ice is the visible part. The damage is usually wet insulation, stained ceilings and tired shingles.

Ice dams in gutters look like a gutter problem. Most of the time they are not.

Removing the ice is the easy part to describe and the hard part to do safely. Here is what a good crew does and how to vet one.

The water from an ice dam rarely stays where it enters. Here is the route it takes and what to check first.

A gutter full of ice is a symptom. Read it from the ground, and do not chip at it.

A little ice on the roof is normal. A thick band at the eave is not. Here is how to tell them apart.

A few small icicles are normal. A heavy row along the whole eave is a message from your attic.

Prevention happens in the attic in summer or fall, not on the roof in January.

Many ice dams do no harm. The real question is whether water is getting inside, and that you can answer from the ground and the attic hatch.

The honest answer to "how do I get rid of it" is mostly about what not to do.

Every method for removing ice dams has a cost. Here they are, from least risky to most.

A roof that only leaks under snow is giving you a clue. The location of the drip tells you most of the story.

Where the snow melts, and where it does not, tells you how the roof is losing heat.

A flat roof holds snow for longer. Here is how to judge it from the ground and from inside.

Most roofs do not need the snow taken off. Here is how to tell, and what is safe to do yourself.

An ice dam is a heat problem wearing a roofing costume. Understanding that is what stops you paying to fix the wrong thing.

Where a gutter goes over is more informative than the fact that it goes over. It is worth watching it happen once.

Where the water drips from matters more than the fact that it drips.

The most useful hail evidence is at eye level, and the biggest risk in the days after a storm is not the weather.

A coating extends a roof that is still sound. It does not rescue one that is already wet, and the prep work decides whether it holds.

A flat roof rarely fails all over. It fails at a seam, a drain or a pipe. Here is how to find which, without climbing up.

The best protection when hiring a roofer is a scope of work written on paper, in plain words, before any shingle comes off.

Architectural shingles are rated for 25 to 30 years. Whether your roof gets close to that depends on four things the wrapper never mentions.

The age of the roof decides most of the decisions on this site, and most people do not know theirs. It is usually findable.

The useful part of patching a roof happens before anyone climbs: finding the spot, limiting the water and getting a clear scope.

The panel rarely wears out first. The screws, sealants and flashing around it do, and that is where a metal roof's real lifespan is decided.

The size of the damage is the least important input. Age and layers decide most of these.

A certification letter looks official, but it is a professional's estimate of what is left in the roof today, not a promise about what happens to it next.

Both panels carry the shingles. The real difference shows up only when water gets to the edges, and that is worth knowing before a roofer says the decking is rotten.

Every roofing material has a typical lifespan. The number on the brochure is the best case, and your attic and climate decide how close you get.

Skipping the tear-off sounds like a shortcut. Sometimes it is. More often it buries the one thing you most needed to see.

One warranty comes from the shingle maker. The other comes from whoever installed them. Confusing the two is how homeowners end up with no coverage for the failure they actually had.

A permit is not paperwork for its own sake. It is the one point where someone with no stake in the sale looks at what your money bought.

Roofs rarely fail all at once. It is usually a short list of signs arriving together, not any one of them alone, that tips the decision toward replacement.

A steep roof is not just a regular roof at a sharper angle. The pitch decides what can be installed, how it drains, and who can safely get near it.

Clay and concrete tiles shed water, but the underlayment beneath them keeps it out. Here is how to read the signs without stepping on a single tile.

Pitch is the single number that decides what can sit on your roof and who can safely work on it. Here is how to read it from the ground.

Slate is stone, and it can outlast the house. What fails first is rarely the slate itself, and you can read most of the warning signs without leaving the yard.

Most corrugated roofs leak at the fasteners and laps, not in the middle of the sheet. Here is how the types differ and what to look for from the yard.

Most of what a roof inspection turns up can be seen from three places: the ground, the eave and the attic. None of them is the roof.

A ladder is a tool for getting your eyes to the eave. The moment it becomes a way onto the roof, the job belongs to someone with fall protection.