If your building needs a commercial flat roof replacement, you’ll want to brush up on some of the details. Understanding the different flat roofing systems, their features, and installation timelines will help property owners make the best decisions for their buildings. Whether you’re a general contractor, a business owner, or a property manager, this guide will walk you through everything you need to know about commercial flat roofing systems, the materials available, and what to expect during the process.
Understanding Commercial Flat Roofs
Commercial buildings often feature flat roofing systems, which are cost effective and relatively easy to maintain. Unlike residential roofs, which often have steep slopes ideal for asphalt shingle application, a flat roof is designed with minimal slope (just enough for water drainage). These systems may be found on industrial buildings, warehouses, office complexes, hospitals, apartment buildings, schools, and other similar structures.
These roofing systems are durable, lasting anywhere from 15 to 30 years (or even longer, for some options) with regular maintenance. But, once they’ve reached the end of their lifecycle, it’s time for roofing replacement. During this process, the existing roofing system is removed, any decking repairs are performed, insulation is installed, and then the new roofing system is installed. If maintained properly, building owners can expect to get another 15 to 30 years from these systems.
Popular Flat Roofing Materials
Choosing the right roofing material for your commercial roofing project is crucial for longevity and energy efficiency. Here are some of the most popular flat roofing materials used today:
- Modified Bitumen: A durable and cost-effective option installed using heat-welded seams. Modified bitumen roofing systems offer strong waterproofing properties.
- Single Ply Membranes: These include TPO, PVC, and EPDM, known for their lightweight and waterproof properties.
- TPO Roofing: Known for its resistance to UV rays, TPO roofing is an excellent choice for businesses looking to reduce heating and cooling costs. It’s a single-ply membrane so it’s cost-effective to install.
- PVC Roofs: These single-ply roofing systems are flexible, resistant to chemicals, and highly reflective, reducing cooling costs.
- EPDM Roofing: A synthetic rubber roofing membrane known for its durability and resistance to extreme weather.
- Metal Roofs: Although less common on flat roofs, metal roofs are extremely durable and provide excellent protection against harsh weather. They can last up to 50 years.
Steps in a Commercial Flat Roof Replacement
1. Assessing the Existing Roof
Before starting a flat roof replacement, a roofing contractor will inspect the existing roof for structural integrity, leaks, and obvious damage. This step ensures the best approach for the new flat roof installation and helps ensure the quote for the work is accurate and comprehensive.
2. Choosing the Right Roofing Materials
The type of roof membrane and roof system you select will depend on several factors. Climate, foot traffic, and maintenance expectations will determine the best option. Flat roof replacement cost varies based on material type and complexity.
3. Removing the Old Roof
Depending on the condition of the roof surface, the old materials may need to be completely removed, while in some cases a new layer can be applied over top. If the roof deck is compromised, repairs will be necessary before proceeding with flat roof installation.
4. Proper Installation of New Roofing System
To ensure proper installation, partner with a qualified roofing professional experienced in following manufacturer guidelines. The installation process varies depending on the type of roofing system, but single-ply systems are typically the fastest to install. Seams between sheets are welded and any flashing is replaced.
5. Final Inspection and Maintenance Plan
After installation, a thorough inspection ensures the new roof is secure and watertight. Implementing a regular maintenance plan helps extend the life of commercial flat roofing systems. Your professional roofing contractor should be able to assist you with your maintenance needs.
Timeline for a Commercial Flat Roof Replacement
The timeline for a roof replacement varies depending on the project size and material selection. Here’s a general timeline:
- Inspection & Planning: 1–2 weeks
- Material Selection & Ordering: 2–4 weeks
- Old Roof Removal & Prep Work: 1–2 weeks
- New Flat Roof Installation: 1–3 weeks
- Final Inspection & Cleanup: 1 week
Larger commercial roofing systems or projects requiring extensive roof deck repairs may take longer.
Choosing the Right Roofing Contractor
Selecting an experienced roofing contractor ensures a smooth roofing project. Look for a roofing company with experience in commercial roofing systems, positive customer reviews, and warranties on workmanship.
At TopKey Construction, we have extensive experience in the commercial multi-family construction industries. We can help you determine which roofing materials will best fit your needs and develop a comprehensive plan for your flat roof replacement. You can feel confident about our craftsmanship and the timeline, ensuring your building is always protected.
Contact TopKey Construction Today
If you’re ready for commercial flat roof replacement, contact TopKey Construction today. We offer a wide range of flat roofing materials, including modified bitumen, single-ply membranes, and metal roofing. We can help you make informed decisions to maximize longevity and energy efficiency. Our team will help improve your building’s energy efficiency while also developing a regular maintenance plan, ensuring you’re able to get as much value for your installation as possible. Contact TopKey Construction today.