Everything You Need to Know About Flexim Roof Mortar
Homeowners and roofers often ask us about Flexim — what it is, how it works, and why it’s become the go-to alternative to traditional cement mortar for roof ridges and hips. Below we’ve answered the most common questions we receive.
Is Northern Roof Tiles the Manufacturer of Flexim?
No — Flexim Roof Mortar is manufactured in the Netherlands by Flexim International BV, where it has been in production for over 40 years.
Northern Roof Tiles is the exclusive North American importer and distributor, supplying Flexim throughout the United States and Canada.
We stock all color variations at our Florida warehouse and ship directly to roofing distributors, contractors, and homeowners.
Is Flexim a Better Solution Than Cement?
In nearly every case — yes.
Traditional sand-and-cement mortar is rigid and prone to cracking with expansion, freeze–thaw, and roof movement. Once cracks form, gaps open up that birds and insects quickly exploit.
Flexim Roof Mortar, on the other hand:
Arrives pre-mixed and ready-to-use — no water or mixing required.
Remains flexible for decades, allowing for natural roof movement.
Adheres to all common tile types, preventing gaps and deterring nesting birds.
Is lightweight, weather-resistant, and paint-free.
So yes — it’s an excellent long-term solution for keeping ridges tight and maintenance-free.
Can Flexim Be Used with Ceramic or Concrete Roof Tiles?
Absolutely.
Flexim is designed to bond with clay, ceramic, and concrete tiles, as well as most standard roofing underlays and accessories. It’s ideal for:
New installations of flat or profiled tiles
Re-roofing or repair projects where traditional cement has failed
Areas prone to bird nesting or wind uplift, such as ridges, hips, and verges
Whether you’re choosing a traditional clay roof tile or a modern flat concrete design, Flexim provides a neat, flexible seal.
What Colors Are Available?
Flexim is available in ten natural colors, designed to complement most roof tile shades.
Standard colors include:
Terracotta
Dark Brown
Rust/Light Brown
Black
Gray
Each color is factory-tinted to maintain consistency and fade-resistance.
Can I Get a Color Sample?
No - We are unable to break up full boxes. But if you send us a picture of your roof we can photoshop the colors on for a side by side comparison.
Can Homeowners Order Directly from Northern Roof Tiles?
Yes.
We accepts orders from both contractors and private homeowners.
You can order Flexim by the box, and we ship via UPS Ground to both commercial sites and private residences across the continental U.S. (Except Florida)
If you’re in Canada, we can coordinate delivery through our import partners to simplify customs clearance.
How Much Flexim Do I Need?
Each box of Flexim contains 10 strips (approx. 21 ft / 6.4 m total coverage) and weighs about 20 lb.
As a general rule:
1 box covers roughly 15 to 20 linear feet of ridge or hip (both sides) on most tile roofs.
Add 1 extra box per 100 ft for waste, cuts, or special detailing.
Our team can estimate your exact quantity if you tell us the ridge and hip length of your roof.
Why Choose Flexim?
Flexim saves installation time, eliminates cement mixing, and creates a watertight, bird-proof seal that moves with your roof — not against it. It’s a proven European product trusted in millions of installations worldwide.
If you’re replacing your roof or repairing existing cement work, Flexim is a smarter, cleaner, and longer-lasting choice.
Contact Northern Roof Tiles
📧 info@northernrooftiles.com
