Roof inspection
An inspection is worth its cost when it answers a decision you are about to make: buying a house, planning next season’s budget, or deciding whether an aging covering has another few years in it. On housing where whole streets share a roof age, one inspection often tells you what the next five years will ask of you.
When it earns its price
Three moments justify the cost here. Before a purchase: a roof at the end of its life changes what a house is worth, and this region’s stock makes age easy to misjudge from the street. After a hard winter: freeze-thaw works slowly and invisibly, and the right time to look is right after the last freeze, before spring bookings fill.
And near the end of a covering’s life: when the real question is “this year or in three years,” a documented answer beats a guess in either direction, because replacing early wastes remaining life and replacing late buys interior damage.
What gets checked
On the surface: granule loss across the field, with special attention to south-facing slopes where the sun works hardest; the condition of edges, ridge caps and valleys; sealant and flashing at every chimney, wall and vent penetration: the transitions where roofs actually give out; and the rubber boots at plumbing vents, which the altitude sun cracks years before the shingles around them fail.
On the attic side, which a street-level look can never replace: ventilation (a starved attic cooks the covering from below in summer and feeds ice damming at the eaves in winter), signs of moisture on the underside of the decking, and daylight where there should be none. A report that skips the attic is half a report.
What the report is good for
Photographs are what make a report portable. They turn one person’s opinion into something three bidders can price against, and into evidence a seller has to answer during a negotiation. A dated report also attaches a season to the work, which matters where the installing window runs April to October: it lets you gather numbers in the quiet late winter instead of competing for a slot in July.
Questions that come up before a Front Range inspection
- Why does the report grade the south slope separately from the north?
- Because a mile above sea level they are not the same roof. The south and west faces take sun that the north never sees, and the granule loss shows it; two slopes of the same age can be a decade apart in condition. A report with one grade for the whole roof has averaged away the finding.
- How many freeze-thaw cycles does a Front Range roof actually see?
- More than almost anywhere with this much sun. NOAA's Denver records average about a hundred and fifty nights at or below freezing a year, and a large share of them follow an afternoon warm enough to thaw, which is the cycle that works the edges and the fasteners. The report should say which edges show it.
- What does an inspection look at on a house in a subdivision built all at once?
- Your roof, and the street. When the whole phase went up in the same two years, the neighbors' roofs are a calendar for yours, and the report should place the house on it: first covering or second, ahead of the street or behind it.
- Do the rubber boots around the vents need their own line in the report?
- Up here, yes. Sun at this altitude turns the boots brittle long before the shingle around them is done, and a roof is judged by its penetrations before it is judged by its field. Each one gets a note, and a photo.
- What are inspectors actually looking for that fails a roof up here?
- Cracked vent boots, sealant used in place of rebuilt flashing, exposed fastener heads that the freeze-thaw cycle has worked loose, and granule loss heavy enough to leave a bald patch on the south slope. A roof can carry years of life and still fail on one of these, because they are graded as separate findings rather than folded into an overall condition score.
- Why do I keep getting calls offering a free roof inspection?
- Those calls are typically generated from address lists worked by canvassing crews rather than from anything specific to your roof, and they tend to pick up every spring, once the snow is off the roofs along the Front Range. An inspection worth trusting is one you scheduled for a reason you can name, and it ends with a written report and photographs rather than a pitch to sign before the inspector leaves.
- 1 Ridge caps. Worked loose by a temperature swing that happens every single day.
- 2 The field. High-altitude sun dries the covering out from above, faster than the calendar says.
- 3 Valleys. Where two slopes drain as one, and where meltwater runs longest.
- 4 Flashing. Chimney joints, and the line where the garage roof meets the house.
- 5 The vent boot. Rubber cracks early at this altitude, well before the shingles do.
- 6 Eaves. Ice builds at the edge wherever the attic is leaking heat into the roof.