The Roofing Repairs Your Home Might Need When a Leak Develops in a Roof Valley

The valley of your asphalt shingle roof is likely to wear out quicker than the rest of the roof. When a roofing contractor checks your roof to see if it needs repairs, they'll check the valley carefully. Here's why the roof valley is susceptible to damage and the repairs the roofer might need to do.

Why Roof Valleys Wear Out Quicker

One reason a valley wears out quicker than the rest of the roof is that rain rolls off the rest of the roof to the valley where the water rolls to the downspout. The rain washing over the valley eventually wears away protective granules. With the granules gone, sun damage escalates and the shingles start to crack and leak.

Another cause of leaks in roof valleys is because leaf clumps, twigs, and other debris gets caught and creates a dam. The dam blocks the flow of rain, and water can push under the shingles and start leaking.

The shingles in the roof valley can also simply wear out due to age, and that could be a sign it's time to have your entire roof replaced. However, valley leaks are usually repaired if your roof doesn't need to be replaced yet.

How A Roof Valley Is Repaired

The shingles in a roof valley are applied differently from the rest of the shingles on your roof. Valleys usually have metal flashing, a protective moisture barrier, and shingles that overlap. When the valley leaks, the problem could be with any of these parts.

The roofing contractor needs to remove a few rows of shingles up the slope from the valley to see what's going on and to replace flashing and underlayment. Flashing is usually cut to fit from sheet metal, and it plugs gaps created where roof slopes meet.

The flashing is covered with a water barrier that's cut large enough to apply up the sides of the slope for a few rows of shingles. The moisture barrier covers the flashing and bonds to create a waterproof barrier that stops leaking. Last, the new shingles are applied so rain rolls over the top of them. The new shingles have a lot of granules on them so the valley will have improved protection and could last for many more years.

It's always a good idea to check on your roof valley once it's had a leak to make sure materials used in the repairs don't wear out quicker than the roofing. For instance, adhesives might wear out due to age, crumble, and allow a leak to develop. By working with roofing repair services, you can find and address leaks in your roof valley before the leak causes water damage to your home.

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sustain a metal roof under trees

I have a lot of trees that hang over the roof of my home. I had done a lot of reading that told me that those trees would shorten the lifespan of the roofing shingles, but I wasn't about to cut down the big trees that are a highlight of my property. Instead, I waited until the roofing needed to be replaced and I replaced it with a more durable option - metal roofing. Now, I know that the trees can stay where they are and that the roofing will remain in good condition as long as I do a little maintenance work every now and then. Find out what you need to do to sustain a metal roof under trees.