Building a new home is exciting. Every part comes together one step at a time, and the roof is one of the most important pieces. But many people wonder this question. When does the roofing system go on during new construction?

The roof is not added all at once. It follows a clear process to make sure everything is strong, safe, and built to last. In this article, we will walk through the 7 main steps that happen before the roof goes on. By the end, you will know exactly when the roofing begins and why each step is so important.

1. Frame the House

The first step is building the frame of the house. This includes the wooden structure that shapes the walls and roof. It is like the skeleton of the home and gives it strength.

Once the roof trusses or rafters are in place, the house is ready for the roof decking.

2. Install the Roof Deck

The roof deck, also called sheathing, is made of flat boards like plywood. These boards are nailed over the roof framing to create a solid surface. This surface holds everything else in the roofing system.

A strong roof deck is important. It helps protect your home and supports the layers above it.

3. Add Drip Edge and Underlayment

Next, a drip edge is installed along the edges of the roof. This is a piece of metal that helps water flow off the roof and into the gutters. It keeps water from getting behind the roof and causing damage.

Then the crew rolls out the underlayment. This is a layer of waterproof material that covers the entire roof deck. It adds extra protection in case water ever gets past the top roofing layer.

4. Apply Ice and Water Shield

Some parts of the roof need even more protection. That is where ice and water shield is used. This sticky material covers areas like roof valleys, edges, and spots around vents or chimneys.

It helps stop leaks in places where water is more likely to collect. In cold areas, this step is often required by code.

5. Install Starter Shingles and Flashing

Before the main roofing goes on, starter shingles are placed along the edges of the roof. These help seal the first row of shingles and protect from strong winds.

Flashing is also added. It is made from metal and placed around things like chimneys, vents, and walls. Flashing helps guide water away from tricky spots so it does not sneak into cracks.

6. Add the Main Roofing Material

Now the top layer goes on. This is the part everyone sees. It could be asphalt shingles, metal panels, clay tiles, or another material. What you choose changes how your home looks and how long the roof will last.

Roofers carefully install this layer piece by piece. When it is done right, it keeps your home dry and protected for many years.

7. Finish With Ridge Caps and Vents

At the top of the roof where two slopes meet, ridge caps are added. These special pieces seal the peak and give the roof a finished look. They also stop rain from getting inside at the highest point.

Roof vents are also installed. They help fresh air flow through your attic. Good airflow keeps your attic cool and helps your roof last longer.

Final Thoughts

So when does the roofing system go on during new construction? It starts after the frame is built and finishes once all the layers are carefully installed. From the roof deck to the vents, every step builds a strong roof that protects your home.

If you are planning a new home, it helps to know how the roofing process works. When you understand the steps, you can feel more confident every time you look up.