TriRoof FLEX on a New 18mm OSB Deck, Installed in One Day

For this project in County Dublin, the TriRoof FLEX liquid overlay system was installed by Connolly Fibreglass to create a seamless, flexible, and fully bonded waterproof finish. A new 18mm OSB deck was carefully prepared and cleaned to provide the ideal substrate for the system, while trim details were incorporated to improve drainage and deliver a neat, professional appearance. Completed in just one day, the installation minimised disruption and left the building protected with a durable, long-lasting roofing solution.

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Roofing

A New Deck, Finished in a Day

This flat roof project in County Dublin was completed on a new 18mm OSB deck, which was carefully prepared and cleaned by Connolly Fibreglass prior to installation. This preparation provided a clean and suitable surface for the TriRoof FLEX liquid overlay system to bond effectively with the roof substrate.

To help manage rainwater runoff and enhance the overall finish, trim details were installed around the roof perimeter. These features contributed to improved drainage while creating a cleaner, more professional appearance.

The installation was completed within a single day, keeping disruption to a minimum and allowing the project to progress efficiently. The result was a neatly finished roof featuring the seamless TriRoof FLEX liquid overlay system.

What the project delivered

Location
County Dublin

Roofing contractor
Connolly Fibreglass

Deck
New 18mm OSB

System
TriRoof FLEX liquid overlay

Trims
TriRoof GRP Trims

Programme
Completed in one day

Preparation and Installation

The new deck was prepared and cleaned, the FLEX liquid overlay was applied, and trim details were added to finish the roof.

New 18mm OSB flat roof deck in County Dublin prepared for the TriRoof FLEX roofing system installation.

STEP 1

PREPARE

The new 18mm OSB deck was prepped and cleaned, giving the FLEX liquid overlay a clean surface to bond with.

STEP 2

APPLY

The TriRoof FLEX liquid overlay was applied to the prepared deck.

Completed TriRoof FLEX flat roof installation in County Dublin

STEP 3

DETAIL

Trim details were added to help with drainage and to give the roof a neater look.

“I’ve been using the FLEX overlay for years — whether it’s overlaying over felt, asphalt, concrete, commercial or domestic, or a new roof, it’s my go-to liquid roofing system.”

Alan Connolly
Connolly Fibreglass

What TriRoof FLEX Delivered on This Roof

Clean bond

A prepared, clean deck gave the liquid overlay a sound surface to bond with.

Better drainage

Trim details help water drain off the roof.

Neater finish

The trims also give the roof edges a tidier appearance.

Single-day install

The whole job was wrapped up in a day.

Minimal disruption

A short programme on site meant very little disruption.

Flexible finish

The completed roof has a protective, flexible finish.

A Smooth Single-Day Install

Roof Preparation

The new 18mm OSB deck was thoroughly prepared and cleaned, providing a suitable surface for the TriRoof FLEX liquid overlay.

Roofing Application

The TriRoof FLEX liquid roofing system was applied to the prepared deck, creating a protective, flexible finish.

Drainage and Detailing

Trim details were added around the roof to help with drainage and provide a neat, professional appearance.

Single-Day Installation

Connolly Fibreglass completed the entire installation in one day, keeping disruption to a minimum.

The Finished Result

The completed flat roof features a consistent grey finish, with neatly detailed edges and a protective TriRoof FLEX roofing surface.

Completed TriRoof FLEX liquid roofing installation showing the finished grey flat roof surface in County Dublin.

Planning a Flat Roof Project?

TriRoof liquid systems are designed to overlay existing flat roofs where a strip-out is not practical. Speak to the TriRoof team about your deck and specification options for TriRoof FLEX.

Frequently Asked Questions

What deck was TriRoof FLEX applied to?

A new 18mm OSB deck on a flat roof in County Dublin.

Connolly Fibreglass prepped and cleaned the new deck before application, giving the FLEX liquid overlay a clean surface to bond with.

To help with drainage and to give the finished roof a neater appearance.

The whole installation was completed in a single day, with very little disruption.