TechNews: VacuSeal Systems FAQ

Versico’s VacuSeal vent secured roofing systems are quick and easy to install and save you money and labor by substantially reducing the amount of glue, ballast, or fasteners your project needs. This engineered system is designed to provide optimal performance while opening opportunities for retrofit and monolithic deck applications.
How does it work?
VacuSeal Vent Secured Roofing Systems use specialized vents to create negative air pressure that removes excess air beneath the roof membrane and creates a suction effect which holds the newly installed system securely in place. Click here for a video overview of how this system works.

Where can it be used?
VacuSeal is a perfect solution for decks that can be difficult to attach to with traditional systems, specifically on monolithic decks like concrete, gypsum, or tectum. They are particularly beneficial on retrofit projects directly over a secure, existing roof system. For more information about how VacuSeal is a great option for re-roofing projects, click here.  

What are the most common types of roof decks for VacuSeal systems?
Monolithic decks and roof decks with unique conditions that make mechanical attachment undesirable are the most common, although not exclusively. We consider monolithic decks to be all types of concrete, gypsum, cementitious wood fiber, etc.

What materials are used?
The system utilizes vents, sealant tape, and distribution strips in lieu of traditional fasteners and adhesives to hold the newly installed roof system securely in place.

What is the detail to create a complete air seal around the perimeter and parapet walls?
We utilize a modified base tie-in/angle change securement detail. In place of RUSS strip or plates and fasteners, we install butyl tape behind the field membrane on the wall/curb. We then fasten the field membrane into the wall with termination bar and fasteners 6" O.C. We have details that illustrate and define this method (details V-5.1 and V-12.3).

Where do the vents go?
The ideal locations for vents on a given roof are primarily outlined in our Technical Evaluation Report (TER 1401-02), and each roof is laid out according to the design recommendations. Each roof is evaluated separately to determine the location at which the vent will perform as effectively as possible. Interior vents are required on all roofs over 250' x 250'. At our discretion, we may include some interior vents on smaller areas.

Is jobsite assistance provided? Versico provides on-site startup training and assistance for every VacuSeal job, as well as phone calls and access to their technicians before, during, and after the installation to cover any questions or concerns that come up during the process. For more information about the steps involved in a VacuSeal project, check out this case study about a project in Texas

What kind of warranties are available?
Versico offers full system warranties up to 20 years for VacuSeal roofs. Please reference specifications for system requirements pertaining to warranty length.

What is the best practice for installing a VacuSeal system? Do you install the outer edges first and get all the vents in place, or do you go in one direction?
Typically, you start in a corner or somewhere along the edge of a roof and work across; it is not recommended to install the perimeter first. Best practices include installing air seals daily and installing all vents for an area daily.

What is best practice for keeping the system in place during the roofing process, before the system is complete?
Installing vents and air seals daily will ensure the roof is working and stays in place. Standard nighttime tie-in methods are required for overnight seals.

Does this system work as part of a metal roof overlay system with flute fill and insulation?
Yes, it is possible to do a retrofit system with VacuSeal. Existing metal panels are required to be sealed and airtight.
For more information and resources, click here

Up Next

March 23, 2023

TechNews: Welding Guidelines for TPO and PVC

In this post, we’ll discuss a few best practices that reduce the chances of cold welds and help ensure the watertight integrity of TPO, PVC, and KEE HP single-ply roof systems.

February 23, 2023

TechNews: Winter Safety Tips for Roofers

When working on the roof in cold weather, it is important that roofers protect themselves from winter hazards.

January 26, 2023

TechNews: Don’t let winter weather put your project on ice

When crews are working in cold temperatures, special storage and installation techniques are often required. Here are some tips for making sure your cold weather projects go as smoothly as possible.