+44 739 279 1641How to Install Steel Roofing: A Guide by Iron Construction UK
Steel roofing has quickly become a preferred roofing solution for homeowners and property developers in the UK — and for good reason. It offers unmatched durability, a clean, modern look, and excellent long-term value. Whether you’re upgrading your current roofing system or building a new property, installing a steel roof is a smart investment.
At Iron Construction, we specialise in steel roofing installation and home renovation services across London and surrounding areas. This comprehensive guide will explain the benefits of steel roofing, outline the installation process, and explore whether it’s possible to install steel roofing over existing shingles — a question we often get from homeowners looking for cost-effective solutions.
Why Steel Roofing is a Smart Choice in the UK
Steel roofing offers a wide range of benefits, especially in the UK, where weather conditions can be unpredictable. Here’s why it stands out:
- Long Lifespan – A properly installed steel roof can last between 40 and 70 years, outlasting traditional materials like asphalt shingles.
- Low Maintenance – Unlike tile or slate, steel roofs don’t crack, warp, or grow moss.
- Weather Protection – Resistant to high winds, heavy rain, snow, and even fire.
- Sustainability – Steel is 100% recyclable, making it an eco-friendly choice.
- Energy Efficiency – Reflective coatings on steel panels help reduce summer cooling costs.
Steel roofs are not just functional — they also enhance a property’s curb appeal and resale value.
Preparing for Installation: Things to Know
Before any steel roof installation begins, it’s important to assess the existing structure and take accurate measurements. Each roof is different, and the preparation stage plays a huge role in the success of the installation.
If you’re looking for a detailed technical breakdown of the entire process, we recommend reading this helpful guide: How to install steel roofing. Here’s a summary of what’s involved:
Step-by-Step Guide to Steel Roof Installation
1. Measuring the Roof Area
Measure your roof’s square footage carefully to calculate the amount of steel panels and accessories you’ll need. This includes allowing for overlap and overhangs.
2. Remove Old Roofing (If Needed)
In some cases, removing old roofing material is necessary to inspect the deck and ensure it’s in good condition. However, as we’ll discuss below, it’s possible to install over shingles in many situations.
3. Install the Underlayment
An underlayment, such as a synthetic roofing membrane or felt paper, is installed to act as a water and vapor barrier. This step is critical for long-term roof health.
4. Install Flashing and Edging
Flashing is installed around valleys, chimneys, skylights, and other vulnerable areas to direct water away. Eave trim and gable trim provide extra protection and clean lines.
5. Place the Steel Panels
Starting at the bottom edge of the roof, steel panels are laid out horizontally, overlapping each one by a recommended amount (usually one corrugation or about 6 inches). Panels are then secured using specialised screws with rubber washers to prevent leaks.
6. Install the Ridge Cap and Finishings
Finally, a ridge cap is installed along the roof peak to seal the structure and provide a clean finish. Sealant and closures may also be applied for additional waterproofing.
Installing Steel Roofing Over Existing Shingles
One of the most common questions we hear from clients is: “Can I install a steel roof over my current asphalt shingles?”
The answer is yes — in many cases, it is possible to install steel roofing over existing shingles without having to tear off the old roof. This method is cost-effective and reduces installation time and landfill waste. However, it’s important to ensure that the existing roof is:
- Structurally sound
- Free of leaks or significant damage
- Not already over its weight-bearing limit
For a full breakdown of this process, check out this excellent resource: How to install steel roofing over shingles.
Common Mistakes to Avoid During Installation
To ensure a smooth and long-lasting steel roof installation, avoid these common errors:
- Using the wrong type of fasteners – Specialised fasteners are needed to prevent rust and leaks.
- Improper panel alignment – Misaligned panels can result in gaps and water infiltration.
- Skipping the underlayment – This is crucial for protecting the structure underneath.
- Incorrect flashing installation – Poor flashing work is one of the main causes of leaks.
That’s why hiring experienced professionals like Iron Construction is key to a flawless finish.
Why Choose Iron Construction for Your Steel Roofing Project?
Based in Chiswick and serving all of London, Iron Construction brings years of experience, craftsmanship, and attention to detail to every project. We use premium materials, follow best practices, and ensure every job is done to the highest standard.
Whether you’re based in Ealing, Putney, Richmond, or surrounding boroughs, we’re ready to help transform your home with a strong, stylish steel roof.
Get a Free Quote Today
If you’re considering steel roofing for your home or commercial building, we’d love to hear from you. Visit our website at ironconstruction.uk or give us a call to schedule a free consultation.
Let Iron Construction protect your property with a roof that’s built to last.