How to Shingle a Valley: 6 Ways to Ace the Rough Angles

large roof valley in the wilderness with mountain view

Shingling a valley can be a tricky process for both construction workers and individuals trying to get the job done themselves. There are multiple ways of shingling a valley. Each way can come with various positive and negative aspects. Regardless of your chosen method on how to shingle a valley on your roof, you will need to understand what techniques should be used and what hazards to watch out for. Today we will be giving you some tips and tricks that help you learn how to shingle a valley. We’ll also walk you through the pros and cons of each valley-shingling method.

Where to Start Concept 1

Before deciding to shingle your valley, you should know the following:

  • The basics of shingling.
  • The three main methods.
  • The costs.
  • Tools and materials you’ll need.

Once you have learned the basics, it is necessary to figure out how damaged your valley is. The more damaged it is, the more repair you will need. This assessment can make a big difference when deciding who will do the job.

Proper Preparation Concept 2

After you decide you need to shingle your valley, you must choose whether to do it yourself or to hire a contractor. This decision should be based on your confidence in either your current ability to shingle a roof or your ability to learn. Either way, when shingling a valley becomes a necessity, the person in charge must have the right tools and materials.

You are going to need need the following tools and materials:

  • A hammer.
  • Standard nails.
  • Galvanized nails.
  • Shingles.
  • Roofing cement.
  • Lumber.
  • A stick of roofing chalk.
  • Utility knife.
  • A staple gun.
  • A roof brush.
  • Replacement flashing.

Along with these items, you will also need a sturdy ladder to get you up your roof. It may even be a good idea to invest in some safety straps to prevent injury.

Once you have your materials, you will need to take your roof brush and climb your ladder to clear various debris and obstruction out of the way. This step is important since an unclean roof could have loose nails or broken shingle that could fall on your or simply be a nuisance when attaching the new shingles.

Three Types of Valley Shingling Concept 3

There are three types of valley shingling that can get the job done. These are Woven, Closed Cut, and Long Island. It is critical to know all three in your endeavor of learning how to shingle a valley. Your roof may yield the best results with one specific method.

a. The Woven Method

This is where each layer of shingle passes beyond the valley ridge and overlaps the one on the other side. These layers alternate as you work up the roof. This method ends up creating a woven effect.

The Woven Method has twice the thickness of a standard shingle because part of the valley will have two shingles stacked on top of each other. Unfortunately, this additional insulation comes with a few issues. When weaving this shingles, pockets of air can form between them, causing the roof to appear deformed.

b. The Closed Cut Method

This method implies shingles being trimmed to meet each other at the ridge. This method can seem quick and convenient for someone reading about how to shingle a valley. While this is true about the Closed Cut Method, it can also cause problems including lack of insulation and the cost of additional resources. If using this method, after the job is done, the ridge needs to be sealed with extra roofing cement.

c. The Long Island Method

Long Island is a method that stems from the Closed Cut Method. After cutting the shingles to meet each other at the ridge, many contractors and builders like to add a layer of shingles at the ridge for extra protection and insulation. The extra shingles are sealed on top of the new layer with roofing cement.

Set the Underlayment Concept 4

Once you decide which method to use, it is time to measure each angle of the valley carefully and figure out which type of shingle is best for your local weather conditions. Next, you need to install the new underlayment which will help insulate and protect your roof.

Different types of this underlayment may be used. This layer can be made of asphalt or heavy felt paper depending on what is needed for your shingle type and weather type. After that initial protection is stapled down. You will need to put proper flashing on the edge of the roof as well as around your chimney.

Lay Down the Shingles Concept 5

man repairs roof with hammer, nails, shingles

One of the most important parts of understanding how to shingle a valley is the idea of quality. This is where your roof chalk will come into play, as you will need guidelines and reference points. If you can be precise by using chalk lines, you will be able to get the job done right.

After your underlayment and flashing are down, its time to add the starter course. Typically the starter course of roofing shingles is laid down. Afterwards, the next step is to install a drip edge on top which overhangs 1/4in to 3/4in.

Now that everything is laid down, you can apply your shingles. The first shingles should only have about three inches exposed after the second layer is nailed down. Every layer after that will have around five inches exposed.

Finish The Job Concept 6

Once you have shingled the whole roof, it is time to seal all the ridges. To ensure protection and longevity, you should use ridge shingles. The ridge shingles are a normal shingle but nailed on top of the ridge and overlap the shingles on both sides. Nail those down, and your roof will be set to go.

Wrapping Things Up

By looking at these 6 concepts that explain how to shingle a valley, you should now be able to get started on your newest shingling project. If you are brave enough to do it yourself, make sure you carefully measure each shingle and plan out each step beforehand to ensure a quality job.

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