Capping Flashing
Capping flashing is a custom metal trim used to seal the gaps where roof sheets or wall panels meet. City Steel makes precision-bent flashing that stops rainwater from entering your building at the roof peak (ridge) and wall corners. These trims act as the final seal, protecting your steel structure from rust and keeping your warehouse goods dry. You get high-strength Galvalume or color-coated steel trims that resist corrosion for over 20 years. We bend every piece in our Savar factory to fit your building's exact roof slope, ensuring a tight, leak-proof fit. This protects your insulation and preventing moisture from damaging your main steel beams. This product is used for PEB warehouses, garments factories, and industrial sheds across Bangladesh. Whether you need ridge caps, corner trims, or barge boards, we fabricate them to match your existing roof profile.
Product Description
Custom Capping Flashing & Roof Trims
Capping flashing is the final metal component installed on a steel building to cover gaps where roof or wall panels meet. City Steel makes precision-bent metal flashing that acts as a seal for your structure. Without these trims, rain enters through the roof peak or wall corners, which causes rust on the main beams and damages your factory goods.
You get a 100% leak-proof finish because we design our flashing sheet to overlap your roof panels perfectly. We use high-tensile steel with an aluminium-zinc (Galvalume) coating. This material stays rust-free for 20+ years, even in the high humidity of Bangladesh.
This capping flashing fits PEB warehouses, textile factories, and commercial sheds. Whether you need a simple ridge flashing or a custom barge board flashing, we fabricate every piece to your building's exact drawings.
Why Choose City Steel Capping Flashing?
Prevents Leaks at the Roof Peak
The ridge flashing covers the gap where two roof slopes meet at the top. It is the most important seal on your building. Our ridge caps are wide enough to prevent "blow-back" rain from entering the building during heavy storms and high winds.
Protects Gable Walls from Water Damage
We fabricate barge board flashing to seal the edge where the roof meets the side wall. This trim directs water away from the wall panels and prevents moisture from entering the building through the gable ends. This keeps your wall insulation dry and effective.
Color-Matched to Your Roof Sheet
Your factory looks better when the trims match the panels. We offer color roof flashing in standard industrial colors like Blue, Off-White, and Green. Since we use the same material as the roof sheets, the color fades at the same rate, keeping the building's look consistent.
Galvalume Coating Resists Rust for 20+ Years
Standard MS sheets rust quickly in Bangladesh. We use Galvalume (a mix of aluminium and zinc) for our metal flashing. This coating creates a barrier that stops corrosion, even at the cut edges of the sheet.
Custom Bending for a Precision Fit
Every building has a different roof pitch (slope). We do not provide "one size fits all" trims. We bend your L type flashing or apron flashing to the exact degree required for your project. This ensures the flashing lies flat against the sheets for a tighter seal.
Technical Specifications: capping flashing
| Specification | Details |
| Product Type | Custom Metal Roof Trims & Flashing |
| Steel Grade | ASTM A792 / BS EN 10346 |
| Material | Galvalume (Al-Zn) / Color Coated Steel |
| Thickness / Gauge | 0.40mm, 0.42mm, 0.45mm, 0.47mm, 0.50mm |
| Yield Strength | 250 MPa to 550 MPa |
| Dimensions | Custom girth (usually 300mm to 600mm) x Length |
| Coating | AZ150 (150 GSM) / Polyester Paint |
| Standard | MBMA / AISC / BSTI |
| Fabrication | Precision Hydraulic Bending |
| Weight | Approx. 3.5kg to 4.5kg per 10ft piece |
| Lead Time | 2–4 Days for Fabrication |
The thickness you choose matters. Thinner flashing might vibrate or "oil-can" in the wind, while 0.50mm provides a stiff, professional finish. The price of capping flashing is based on the thickness and the total girth (width) of the metal strip.
Is This Flashing Right for Your Project?
Capping flashing is required for any building using metal roof or wall panels. It is the only way to ensure the building is weather-tight. Our trims are common in:
- PEB Warehouses: For ridge, eaves, and corner protection.
- Garment Factories: To keep production areas 100% dry.
- Cold Storage: To seal the building and maintain temperature.
- Roof Extensions: Using apron flashing to join a new roof to an old wall.
We supply projects in Dhaka, Gazipur, Savar, and Chittagong. If you are using CI sheets or industrial deck sheets, you need these trims to finish the edges.
Not ideal for: RCC buildings with concrete roofs, unless you are adding a metal shed onAtop of the roof.
Fabrication, Delivery & Installation
City Steel handles the entire process at our Hemayatpur, Savar factory.
- Measurement: We take measurements from your roof drawings or site.
- Bending: We use hydraulic machines to bend the flashing sheet into the required shape (L-type, U-type, or Ridge).
- Delivery: We deliver the trims carefully packed to avoid scratches.
- Installation: Our crews install the flashing using self-drilling screws with EPDM washers to ensure the screw holes don't leak.
Why Order Your Capping Flashing from City Steel Corporation?
City Steel Corporation has built steel structures across Bangladesh since 2015, with 150+ projects for clients like Singer Bangladesh and the Bangladesh Army. We are the direct fabricator, so you don't pay middleman costs.
What you get:
- Free consultation on your flashing requirements.
- In-house bending and fabrication for a perfect fit.
- Certified Galvalume and color-coated steel.
- Delivery to any project site in Bangladesh.
- Trained erection crews for leak-free installation.
- Fabrication warranty on all products.
Call or WhatsApp our engineers: +880 1711-787556 / +880 1711-991775 (Sat–Thu, 9 AM – 6 PM).
Frequently Asked Questions for capping flashing
What is the difference between ridge flashing and capping flashing?
Ridge flashing is a specific type of capping flashing. It is used only at the top peak of the roof. "Capping flashing" is a general term for all metal trims, including corners and edges.
How is capping flashing priced in Bangladesh?
It is priced by the linear foot or per 10-foot piece. The price changes based on the thickness (0.40mm vs 0.50mm) and how much metal is used in the width. Send us your building length for a custom quote.
Can you make custom L-type flashing for wall corners?
Yes. We can bend the metal to any angle. For wall corners, we usually provide a 90-degree corner flashing that matches your wall panel color.
Does the flashing come with a rubber seal?
We recommend using "closure strips" or foam fillers under the ridge flashing. We can provide these along with the flashing to ensure no rain or birds enter the building.
What happens if I don't use barge board flashing?
If you leave the gable edges open, wind can get under the roof sheets and lift them. Water will also run down the inside of your wall panels, causing rust and damage.
Do you deliver to Chittagong or Sylhet?
Yes. We provide nationwide delivery for all PEB components and flashings from our Dhaka factory.
Products That Go With This
- Industrial Roof Sheet: The main panels that the flashing covers.
- Valley Gutter: Used where two roof slopes meet to create a "V" shape.
- Self-Drilling Screw: Used to fix the flashing to the roof sheets and purlins.
- Wall Cladding: Metal sheets used for the sides of the building.
Get a Custom Quote for Your Capping Flashing Today
Don't let a small gap ruin your industrial building. Quality capping flashing is the most cost-effective way to protect your factory from the Bangladesh monsoon. We provide precision-bent trims that match your building perfectly.
✔ 150+ Projects Completed ✔ Own Savar Factory ✔ Nationwide Delivery
Request a Quote Now:
Call/WhatsApp: +880 1711-787556