How long does it take to put on a roof? The short answer is that most standard homes will see their new roof completed within a week, while more complex or large-scale projects can stretch beyond ten days.
Good news—this process is often easier than it seems when you understand the main factors affecting scheduling. You will soon feel more confident planning your roofing upgrade, and that’s what this guide is all about.
Below, you will find practical insights and tips to help you map out your timeline and spot any potential delays.
Understand typical timelines
The overall duration of a roof installation can vary widely, but most residential jobs finish in under two weeks. Factors such as roof type, house size, and local weather conditions all play a part.
In many cases, a single-storey dwelling with a simple pitched roof might be completed within three or four days. On the other hand, a multi-storey or architecturally complex home can need an extended schedule.
New roof installations
If you are building from scratch, new roof installations can be relatively swift because there is no old roof to remove. Once the home’s framework is in place, professional roofers can usually install a standard asphalt or concrete tile roof in three to seven days.
If you have opted for a more intricate design, however, the process can take closer to two weeks, especially if you have extra features like dormers or skylights.
- Key steps for new roofs:
- Frame inspection and verification.
- Water barrier or underlayment installation.
- Main roofing material placement.
- Flashing, gutters, and final sealing.
Re-roofing projects
Replacing an existing roof has a few added steps—primarily the tear-off or overlay. Tear-off means removing old layers first, which can extend your project by a day or more.
Overlay involves installing new materials directly on top of existing shingles, but only if your current roof meets certain conditions (for example, no underlying damage). Expect a straightforward re-roof to last around five to seven days, while more involved tear-offs can approach ten days or longer.
- Tear-off or overlay considerations:
- Condition of current decking and rafters.
- Disposal of old materials.
- Identifying any hidden damage that calls for repair.
- Replacing old insulation or introducing ventilation upgrades.
Consider major factors
Multiple variables influence how long a project will take, so it helps to know them upfront. From a roof’s physical features to external weather patterns, each factor either speeds up or slows down your timeline.
Roof size and pitch
A bigger roof takes longer to cover, so large homes will need more time than smaller ones. Steeper pitches can slow down a team’s progress because safety measures become more complex, and it is tougher to place and secure materials. If your roof combines different slopes and shapes, that complexity might require extra days for a thorough, leak-proof finish.
Weather conditions
In many parts of New Zealand, unpredictable weather is a leading cause of roofing delays. A light drizzle might not affect certain stages of roof construction, but heavy rainfall or high winds can pause work for safety reasons. When scheduling, consider the season. Late spring and summer often offer better roofing windows with fewer rainy days, speeding up your project.
Material choices
Roofing materials play a critical role in your timeline. Simple asphalt shingles are quick to install, while heavier options like clay tiles or slate demand more time (plus added structural support). Metal roofing, popular for its durability, may also require specialist fitting and precise measurements, adding extra hours to the schedule.
Here is a quick look at typical material considerations:
| Material | Typical Install Speed | Notes |
| Asphalt shingle | Fast | Great for most NZ homes |
| Metal | Moderate | Needs specialised handling |
| Tile (clay/concrete) | Moderate to slower | Weighs more, can suit heritage looks |
| Slate | Slower | Durable but needs extra structure |
Local building codes
Your local council might require inspections or permits that impact how quickly you or your roofing crew can move onto the next phase. Be sure to apply for permits in advance, and schedule any mandatory inspections early to avoid stalling work mid-project. If you work with a reputable company like Kings Roofing, they can guide you through the permit process and help ensure you meet all council requirements.
Plan your roofing project
Because roofing is such a big investment, proper planning helps you stay on time and on budget. You will have several steps to manage before the first nail is hammered in.
Inspection and permits
Begin by scheduling a qualified roof inspection. This helps confirm the condition of your existing structure (if you have one), plus it flags any hidden damage. Next, secure the necessary permits from your local authority. Missing a step here can cause major holdups later, so it pays to handle the paperwork early.
- Common pre-work documents:
- Building consent.
- Engineering approval if you have structural changes.
- Proof of property ownership or related authorisation.
Material delivery
After deciding on the best material for your home, set a clear delivery date. Delays can happen if your chosen product is on backorder or must be sourced from a specialised supplier. Arranging delivery a few days before installation starts can prevent momentum-stopping holdups.
- If possible, store materials in a dry, secure spot near the work area.
- Double-check order quantities to ensure you have enough for the job.
Tear-off or overlay
Late changes to your plan are a recipe for timeline creep. Confirm whether you need to tear off the old roof or if an overlay is viable. While overlay can save time, it is crucial to do it only if your residence meets structural guidelines. Failing to check can lead to future issues like leaks or code violations that may require another round of roofing.
Installation and finishing
The main phase—where your roofing team sets underlayment, lays down the primary material, and seals everything—usually spans most of the project. At this stage, keep communication open with your contractor so you know how things are progressing. If you spot any potential snag, such as missing flashings around chimneys, raise it right away.
- Typical daily tasks during installation:
- Laying the waterproof membrane.
- Installing shingles, tiles, or sheets in sections.
- Adding flashing around vents and skylights.
- Reinforcing ridges and valleys for leak protection.
- Inspecting and cleaning as you go.
Prepare for unexpected hurdles
Even the most carefully orchestrated project can face a few surprises. Knowing the common ones in advance will help you stay calm if they pop up.
- Hidden damage: Once the old roof is removed, you might discover rotting timber or insufficient insulation. Addressing these issues can add a day or more.
- Supply chain delays: If your roof relies on niche materials or custom orders, late deliveries can stall the timetable.
- Weather disruptions: A single day of heavy rain might postpone tasks by two or three days, considering drying time and team availability.
- Crew scheduling: Experienced local roofers in Wellington often juggle multiple jobs, so missing your preferred start date by a day or two can happen.
Good news—by discussing these variables early, you are less likely to be caught off guard. If a delay arises, ask your roofing team for revised estimates and any workaround options.
Wrap up and next steps
The time required to install your new roof depends on many variables, but most homeowners complete the process within one to two weeks. Planning ahead, lining up materials early, and preparing for possible delays help keep your project on track. Be sure to find a reliable partner, such as Kings Roofing, who can guide you through each stage and keep everything organised.
If you want a more accurate forecast, ask for a detailed schedule from your chosen contractor. This forecast should include specific start dates, daily tasks, and buffer time for the unplanned. By taking these steps now, you will soon have a solid, weathertight roof over your head—one that will bring you peace of mind for years to come.
Frequently asked questions
How do I know when I need a new roof?
Look for curling shingles, leaks, or sagging areas. If you spot multiple leaks or a damaged underlayment, it is often more cost-effective to replace rather than patch. A professional inspection will confirm if you need a full replacement or if a roof repair might suffice.
Can I stay at home during the re-roof?
Yes. Noise is usually the biggest issue, along with some dust and debris falling around your home. Most people stay put during the day and step out if the hammering becomes disruptive. Keep children and pets away from the work zone for safety.
Is it faster to reuse existing shingles?
Sometimes, roofers can apply a new layer of shingles directly over an old one, which can speed the overall process. However, this is only possible if your current roof has no major damage, and local codes allow it. Your contractor will guide you on the best route.
Which season is best for roofing?
Late spring to early autumn is ideal. There are fewer storms to slow progress, and ambient temperatures help roofing materials seal properly. That said, experienced roofers can work nearly year-round if they plan around weather patterns, especially in regions like New Zealand where temperatures stay moderate.
Good luck planning your roofing project. By understanding the typical timeline, factoring in potential hiccups, and working with reputable installers, you will be well on your way to a safe and sturdy home. With a bit of preparation, how long does it take to put on a roof becomes a question with an easy, stress-free answer.