English
English
Español
Français

Sign Up for Our E-News!

Join over 18,000 other roofers who get the Week in Roofing for a recap of this week's best industry posts!

Sign Up
CertainTeed Credentialing - Sidebar Ad - Why I Trust CertainTeed
ABC Supply - Sidebar Ad - Siding solutions for any style
Roof Hugger Sidebar Ad - Q2
BITEC-StormBreaker-Sidebar
Project Map It - Sidebar Ad - Close More Roofing Jobs With Project Map It
CertainTeed CCT April ad
English
English
Español
Français

Modified bitumen roofing done right

Modified bitumen roofing done right
March 26, 2025 at 6:00 a.m.

By Anna Lockhart.  

How to identify application errors in modified bitumen membranes and practical solutions for longevity.  

Commercial building owners looking for long-lasting, durable roofing solutions often choose modified bitumen (MB or mod-bit) roofing membranes for their roofing projects. Due to the waterproof nature of the material, MB membranes are an ideal option, sealing off roofs with layers of overlapping bituminous sheets through either a hot or cold-applied configuration. When applied correctly, these membranes can last decades. However, if done incorrectly, left with wrinkles or blisters, buildings can face water damage or other issues. Tremco shares their simple guide to identifying problems with mod-bit membranes and provides explanations for errors and how to troubleshoot solutions.  

In this guide, Tremco professional Kurt Sosinski suggests taking each situation as a unique problem, considering each possibility as a cause for wrinkles in the membrane. Keeping the type of application in mind – whether it was a hot-mopped, torch-applied or cold adhesive application – is also relevant to determining the situation and finding a solution. It is also recommended to check if the membrane is adhered or liftable, and what substrate the membrane was applied to in order to provide the proper solution.  

After considering these facts, and confirming with the original roofer or manufacturer, one can likely pinpoint a cause of the problem and accurately offer solutions. For instance, if the bitumen was too cold when applied and it was meant to be hot, the product didn’t properly adhere into place, causing lifts and wrinkles. Another likely scenario one might encounter is where the membrane was not properly unrolled or pressed into the correct place, causing wrinkles and places where the adhesive isn’t fully coating the membrane.  

While these errors can happen in a variety of ways, with the proper application of mod-bit membranes they are easily avoided. Their exceptional design and weatherproofing properties provide building owners with peace of mind that their building is properly secured when applied correctly.  

To learn more about the importance of proper application and the potential causes of wrinkles in modified bitumen membranes, read the whole article from Tremco! 

Learn more about Tremco in their Coffee Shop Directory or visit www.tremcoroofing.com.

About Anna

Anna Lockhart is the assistant editor for the Coffee Shops and AskARoofer™. When she’s not working, she’s most likely to be found with her nose in a book or attempting to master a new cookie recipe. 

 

 



Recommended For You


Comments

There are currently no comments here.

Leave a Reply

Commenting is only accessible to RCS users.

Have an account? Login to leave a comment!


Sign In
Spanish Estimating Training - Banner Ad
English
English
Español
Français

Sign Up for Our E-News!

Join over 18,000 other roofers who get the Week in Roofing for a recap of this week's best industry posts!

Sign Up
METALCON - Sidebar Ad - METALCON 2025
Uniflex - Sidebar - Silicone Colors - Feb 24
WSRCA - Sidebar Ad - WRE 2025_04.24.2025
SRS - Sidebar Ad (En Espanol Page) - Credit Application
VaproShield-MoisturePhotoSwag-BCD-Sidebar
SRS - Sidebar Ad (En Espanol Page) - Roof Hub