01 · Project overview

What is this project?

Bank Roof Waterproofing in Milan, 5,000 square metres in 2024. Italia. The products on the job are Impermax Polyurea H Flex. Italia is the setting, and the exposure is what chooses the build-up.

Project case study Bank Roof Waterproofing in Milan after Hail Damage This bank roof waterproofing project in Milan covers the Banca Mediolanum HQ.

Hail had punched holes in a young PVC roof, and leaks followed.

In addition, cables and services stay on the deck.

Krypton Chemical supplies the resin system. The duty is ordinary and strict: keep water, wear and weather on the right side of the structure, and do it in the details as well as in the open field.

ProjectBank Roof Waterproofing in Milan
PlaceItalia
Area5,000 m²
Year2024
LineWaterproofing
ProductsImpermax Polyurea H Flex

02 · The challenge

What did this structure ask of the system?

A roof is a field of outlets, laps and edges, and the weather works on all of them. Water does not leak through the middle of a sound bay. It gets in where the detail was thin or where the deck has started to move.

Bank Roof Waterproofing in Milan has to be closed as one system, details first, and then left to do its job without a second visit every summer. Across 5,000 square metres, a thin spot is not a small repair.

Close detail of patched roof substrate before spray, Milan
Close detail of patched roof substrate before spray, Milan

03 · The solution

Which system was trusted here?

The system trusted here is the one named for the job: Impermax Polyurea H Flex. It is chosen because it matches the substrate and the exposure, not because every building wants the same can.

On a roof the membrane has to follow outlets and upstands at the same thickness as the field. An exposed aromatic film takes a topcoat if the colour will be seen.

04 · Application

How is the system built?

The products named for Bank Roof Waterproofing in Milan are applied as one build-up, details before the field. Outlets, edges and changes of plane are closed first, with the same materials as the main area. A system that changes product at the difficult line is a system with a future peel.

The line is Impermax Polyurea H Flex. The deck is dry, the temperature is inside the range that product allows, and the next coat follows while the window is open. Leaving a detail for the following week is how these jobs come back.

On Bank Roof Waterproofing in Milan the roof fails at the edge long before it fails in the field. Parapets, outlets, plant plinths and laps are detailed first, with the same system, at the same thickness. A bay can be perfect and the ceiling still stains if the outlet was a collar of mastic.

The deck moves between the hot afternoon and the night. The membrane has to move with it. A rigid coat maps every crack in the substrate onto the ceiling. Thermal movement is the reason an elastic system is on a roof like this, not a preference for a particular can.

Where the film stays in the sun, colour and waterproofing are two layers. The membrane keeps the water out. An aliphatic coat keeps the appearance. Skipping the topcoat because the membrane is already waterproof is how a sound roof starts to look failed, and then gets recoated for the wrong reason.

05 · Results

What does a job like this stand behind?

Bank Roof Waterproofing in Milan has one standard. The coating is still doing its job after the building is back in use, at the details as well as in the middle. The area on this job is 5,000 square metres.

Figures for cure, thickness and strength, where they are given, come from the product data sheets. They are not a test cut out of this building.

What this asks of Bank Roof Waterproofing in Milan is workmanship at the difficult line. The open field is the easy part of a resin job. Outlets, edges, penetrations and changes of plane are where thickness goes missing, and where water or wear finds the gap. The same products and the same care belong there, and the cure is allowed to finish before the building goes back into use. That is the difference between a coating that was simply applied and a system that stays in service.

06 · Products

Products on this job

Impermax Polyurea H Flex

Named on this project. The data sheet carries the application window and the typical figures.

Technical data sheet

07 · FAQ

Frequently asked questions

Where is this project?

Bank Roof Waterproofing in Milan. Italia

When was the work done?

2024.

Which products were used?

Impermax Polyurea H Flex.

Why are the details done first?

Outlets, upstands and joints are where water gets in. They are closed with the same system as the main area.

Are the figures measured on this job?

No. Thickness, elongation and cure times quoted here are the products’ typical data.

08 · Photos

On site

Bank roof waterproofing Milan — white finished roof field
Bank roof waterproofing Milan — white finished roof field
Close detail of patched roof substrate before spray, Milan
Close detail of patched roof substrate before spray, Milan
Two applicators hot-spraying white membrane, Milan bank
Two applicators hot-spraying white membrane, Milan bank
Completed bright white bank roof waterproofing, Milan
Completed bright white bank roof waterproofing, Milan
Long roof bay showing aged membrane at Mediolanum HQ, Milan
Long roof bay showing aged membrane at Mediolanum HQ, Milan
Close-up of spray gun applying membrane at parapet, Milan
Close-up of spray gun applying membrane at parapet, Milan
Extended view of prepared bank roof field, Milan
Extended view of prepared bank roof field, Milan
White finished bay with tools still on deck, Milan bank
White finished bay with tools still on deck, Milan bank
White strip laid on aged roof before full spray, Milan
White strip laid on aged roof before full spray, Milan
Long white waterproofed aisle on Mediolanum roof, Milan
Long white waterproofed aisle on Mediolanum roof, Milan
Spray application of Impermax Polyurea H Flex, Milan
Spray application of Impermax Polyurea H Flex, Milan

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