Roof Repairs to Get Done Before an Iowa Winter
There's a date on the calendar every fall when shingle work in Des Moines gets harder. It isn't the first snow. It's the first week when the afternoon high stays under about 40°F, because below that the adhesive strip on a shingle won't bond until spring. Some repairs don't care about the temperature. Some do. This is the list of what to hire out before the window closes, in the order we'd do it on our own houses. Prices are typical Des Moines ranges, not quotes.
Why the cutoff matters
An asphalt shingle seals itself to the one below through a strip of thermally activated adhesive. It needs a warm, sunny stretch to bond. Install a patch on a 35°F day in December and those shingles sit loose until April, and any wind between now and then can lift them. We can hand-seal each shingle with roofing cement in cold weather, and we do, but it's slower and it's a second-best bond. If a repair involves new shingles, book it for October.
Flashing, boots, decking, fascia and gutter work can be done all winter on any dry day. Ice dam removal, obviously, happens in the worst weather there is.
The short list, in priority order
1. Anything that's already leaking. $300–$1,500. A stain that showed up in the September storms will be worse in the March thaw, and by then the insulation below it is wet and the drywall is soft. Fix known leaks first. If you're not sure where it's coming from, find the leak from the attic before you call.
2. Cracked pipe boots. $250–$450 each. The rubber collar around each plumbing vent splits after 10–15 years. Look up at them from the yard; a crack at the top of the collar is visible from the ground. Every one of them leaks the first time snow sits against it and melts. The 2005–2012 houses in Ankeny, Waukee and Grimes are hitting this age together.
3. Chimney flashing that's been caulked. $600–$1,500. On the brick chimneys in Beaverdale, Highland Park and around Drake, three generations of caulk are holding the flashing on. Freeze-thaw opens every one of those joints. The fix is step flashing woven into the shingles and counter-flashing cut into the mortar. It doesn't need new shingles, so it can go into November.
4. Valleys without membrane. $500–$1,200. Valleys carry more meltwater than anywhere else on the roof, and on the 2000s roofs they were often laid with nothing under them but felt. A valley re-lay with ice-and-water membrane underneath needs new shingles, so it's an October job.
5. Wind-lifted or missing shingles. $300–$800. Creased shingles from a summer storm lie flat and look fine. Come January, snow load and ice open the crease. Replace them while it's warm enough to seal.
6. Membrane at the eaves on a roof that had ice dams. $800–$2,500 for a section. If water came in over an exterior wall last February, the eave probably has no ice barrier, or one course of it on a roof that needs two. The Iowa code line is 24 inches inside the exterior wall, and on a low-pitched roof with a deep overhang that's four to six feet of membrane. Retrofitting a section means lifting the first courses and re-laying them. Worth it if the roof has years left; if it doesn't, plan the replacement for spring and use the rake this winter.
7. Soft fascia and the first course of decking. $500–$1,500. Where a gutter has overflowed for years. The gutter will pull off under ice load if the wood behind it is gone.
8. Ventilation. $500–$900 for a ridge vent; less for baffles and soffit work. Not a leak repair, but the thing that stops most ice dams. Ridge vent cut into an existing roof, soffits cleared, baffles installed. Can be done on any dry day.
What can wait until spring
- Cosmetic moss and streaking on the north slope
- Minor granule loss on a roof under 15 years old
- A single lifted shingle on a lee slope, if it's hand-sealed
- A full replacement, honestly. December through February is often the fastest time to get a tear-off scheduled, but only on days above 40°F with no snow on the deck, and that's a gamble in January. If the roof is holding, plan it for March or April and get the quote now.
What we do in a Des Moines winter
Ice dam steam removal, tarps, flashing, decking, fascia, and emergency roof repair in Des Moines whenever water is coming in. We hand-seal shingle patches and come back in spring to confirm the strips bonded. Full replacements only on the right days. Book the October work now; by the end of the month the schedule fills with the leaks that didn't get fixed in September.
The companion piece, fall roof prep, covers what you can do yourself before you call anyone. The roof repair page has the rest of the price list.
Need roof work in Des Moines?
Call for a free estimate. Mon–Sat 7am–7pm.