Ensuring a watertight seal around roof hatches is essential for protecting commercial buildings from water infiltration. At Skyright, based in Coeur d’Alene, ID, we prioritize the longevity and durability of built-up roofs (BURs) through precise flashing techniques. This guide details the steps involved in flashing a roof hatch using the hot application method, a process known for its effectiveness in creating robust waterproof barriers.
Why Proper Flashing is Crucial
Roof hatches provide access to rooftop equipment and serve as emergency exits, but they are also common weak points for water infiltration. Flashing acts as the first line of defense, especially on BURs composed of layers of bitumen and reinforcement fabrics.
Key Benefits of Proper Flashing:
- Prevents leaks and water damage.
- Extends the lifespan of the roof.
- Ensures structural integrity during extreme weather conditions.
Preparation and Safety Protocols
Proper preparation is essential before beginning the hot application process.
- Clean the Work Area: Remove all debris and loose materials around the hatch opening to ensure a clean adhesion surface.
- Safety Measures: Adhere to OSHA guidelines, use personal protective equipment (PPE), and ensure adequate ventilation to minimize exposure to bitumen fumes.
- Prime the Substrate: Apply a bitumen-based primer to the roof surface and the underside of the hatch flange for enhanced adhesion.
Step-by-Step Flashing Process
1. Surface Preparation
Start by thoroughly cleaning and priming the substrate and roof hatch flange. This ensures a solid foundation for the waterproofing layers.
2. Cut and Place Reinforcement Fabric
Measure and cut polyester or fiberglass fabric to fit around the hatch opening. Allow for sufficient overlap to cover the edges and corners.
3. Apply Hot Bitumen
Heat the bitumen to the recommended temperature and generously mop it onto the primed surface. Ensure even coverage for maximum adhesion.
4. Embed the Reinforcement Fabric
Immediately place the cut fabric onto the hot bitumen. Smooth out wrinkles and remove air pockets using hand tools or rollers to achieve uniform embedding.
5. Add Multiple Layers
Repeat the application of hot bitumen and reinforcement fabric until the desired thickness is achieved. This creates a durable, multilayer barrier.
6. Seal the Edges
Use additional bitumen to seal the edges, ensuring no water can seep underneath. This step is critical for a seamless finish.
7. Conduct a Final Inspection
Inspect the finished flashing to confirm a watertight seal and address any imperfections.
Unique Insights
Did You Know? Properly installed flashing can extend a roof’s life by up to 20 years, saving thousands in premature repairs and replacements.
SkyRight’s Expertise
SkyRight is your go-to contractor for roofing solutions, recognized as Bonner County’s #1 rated roofing company in 2023 and an Owens Corning Preferred Contractor. Our commitment to excellence ensures that every roof hatch flashing installation is completed with precision and care.
FAQs
Q1: What is a built-up roof (BUR)?
A built-up roof consists of layers of bitumen and reinforcement fabrics, offering durability and weather resistance.
Q2: Why is hot application preferred for flashing?
Hot application creates a seamless, watertight seal that is more durable than other methods.
Q3: Can I flash a roof hatch without professional help?
While possible, improper installation increases the risk of leaks. Professional expertise ensures durability and compliance with safety standards.
Q4: How often should flashing be inspected?
Inspect flashing annually or after severe weather events to ensure its integrity.
Q5: Is flashing installation covered by insurance?
Coverage depends on your policy, but professional documentation can help validate claims.If you want to read a blog about how storm damage can necessitate roof replacement, click here.