Roof Inspection & Condition Assessment

From the ground a roof gives you its age and very little else. Dark streaking is algae, and it tells you nothing at all about how much roof is left. Granule loss on its own is weak evidence too, because a roof sheds granules from the week it goes on. Curling at the shingle edges is the exception worth taking seriously. Curling is the mat shrinking and going brittle, so a field of it sits much closer to the end of a roof than to the middle, and it is one of the few signs that genuinely reads from the driveway. What curling cannot tell you is the condition of the deck underneath it, and the deck is the part of the roof you never see from the ground. The attic is the only look at it anyone gets before a tear-off.

So a serious inspection goes into the attic with the lights off. Staining on the underside of the sheathing says water has been arriving there, which is not the same as saying it got in there. Water enters at a detail upslope, then travels down the underside of the deck, along a rafter or down a nail shank before it drips or wicks, so a leak that starts at a ridge or a high wall flashing will often stain near the eave. The stain is the end of the path. You trace it back up the rafter and the deck to find the beginning. Daylight gets read the same way rather than as a verdict on its own. Daylight around a plumbing boot or an abandoned fastener hole is a path and not a maybe, while daylight at a masonry chimney or a flue is the clearance that detail is required to have, so the question there is what the flashing above it is doing. Sheathing that sags between the rafters, gives under hand pressure, or has started to come apart at the panel edges is soft, and soft is either a panel that has been wet or a panel that was underbuilt for the span it is crossing. Rusted nail points and insulation matted down in one spot help tell you which of the two it is, and how long it has been going on.

The attic also settles a confusion that costs people real money: not every bit of water in an attic came through the roof. A bath fan that terminates in the attic instead of outside, an air handler sweating through a summer, or an attic with its intake blocked at the soffit will all put moisture on sheathing while the covering above is perfectly sound. A new roof fixes none of those. Where there is no attic to get into, a vaulted ceiling or an assembly with no access hatch, that limit is worth being told about plainly, because it changes how much an inspection can honestly conclude.

A real estate transaction asks a narrow question: how much life is left, and is anything up there going to reopen a negotiation. Buyers usually arrive with a general home inspection already done, and that report covers an entire house rather than one roof in depth. A roof specific look earns its place when the covering is near the end of its range, when there is evidence of previous repair, or when the home inspection flagged something and stopped there.

A storm asks a different question, which is whether there is event damage at all and whether it can be told apart from ordinary wear. Hail bruising and shingles whose sealant strips have broken are both close to invisible from the ground, and both are time sensitive in a way that wear is not. An insurance carrier asking for a roof condition report is asking a third question again, and it is the one owners most often answer for the wrong audience. What a carrier is recording is the state of the roof on a given date, so the version that helps you is dated, photographed, and specific about which findings are event damage and which are wear.

The fourth reason is the one with no deadline attached, and it is the hardest to answer well. An owner who simply wants to know how much roof is left is asking for a judgment, and the honest form of that judgment is a range with reasons behind it rather than a number. Age, ventilation, the state of the flashings and whether the deck has ever been wet all pull that range in different directions, and anybody who answers with a single confident figure before going into the attic hasn't really looked.

An inspection answers what is on the roof, what is failing and why. A quote prices a defined scope of work and assumes somebody has already decided what that scope is. The same person often does both in one visit, which is how the two got blurred, but either can happen without the other. A roof can be inspected with no work following it, and that is a normal outcome rather than a failed visit.

The cleanest way to tell them apart is to ask what the visit exists to produce. An estimate prices a scope somebody has already settled on, so it ends in a proposal, because a proposal is the thing it is for. An inspection is a condition assessment, and it can end with nobody doing any work at all. The two get advertised as though they were one visit, so it's worth asking plainly which one is on offer before anybody gets on the roof. It decides what you're holding when they leave.

Damage on the north plane at the chimney is a finding. Damage is not. The test is whether a second roofer could walk to the same spot on the roof carrying nothing but what was written down. Photographs of the actual condition beat a verbal summary, and a stated cause beats a stated symptom. Whether a water path is still active is what separates a repair worth doing this month from one you can plan around. The other thing worth insisting on is a straight answer when nothing is wrong, because a sound roof is a legitimate result and it should be said in those words.