House Cool Roof Waterproofing in Tarragona: Rayston Proof PU Plus
House Cool Roof Waterproofing in Tarragona: Rayston Proof PU Plus, 250 square metres in 2025. España – Cataluña. The products on the job are Impermax QC.
01 · Project overview
What is this project?
House Cool Roof Waterproofing in Tarragona: Rayston Proof PU Plus, 250 square metres in 2025. España – Cataluña. The products on the job are Impermax QC. Catalonia works a roof and a floor hard: sea air on the coast, a sharp swing between afternoon and night, and industrial towns that do not stop for a slow coating.
The applicator, Nomen Pintors, used Rayston Proof PU Plus.
We make this reinforced polyurethane cool roof system.
Before the works, however, old tiles still covered some areas.
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.
| Project | House Cool Roof Waterproofing in Tarragona: Rayston Proof PU Plus |
|---|---|
| Place | España – Cataluña |
| Area | 250 m² |
| Year | 2025 |
| Line | Waterproofing |
| Products | Impermax QC |
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.
House Cool Roof Waterproofing in Tarragona: Rayston Proof PU Plus has to be closed as one system, details first, and then left to do its job without a second visit every summer. Across 250 square metres, a thin spot is not a small repair.
03 · The solution
Which system was trusted here?
The system trusted here is the one named for the job: Impermax QC. 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?
Impermax is the cold liquid polyurethane. Stir it slowly, let the bubbles rise, and lay it by roller, brush or airless spray. Two coats in different colours, about 1 kg per square metre each, make the coverage obvious. A spiked roller knocks bubbles down while the film is wet. Outlets, upstands and cracks are detailed first. Keep the deck between 5 and 40 degrees C, and keep it dry.
On a warm day a coat is walkable in one or two days. About 90 percent of final properties arrive in three days, and full hardness takes 10 to 15 days. Wait that long before the surface is held under water. Typical elongation is 450 to 600 percent. The resin is aromatic, so a roof left in the sun is given an aliphatic topcoat if the colour has to stay true. Again, these are datasheet figures, not a reading taken on House Cool Roof Waterproofing in Tarragona: Rayston Proof PU Plus.
On House Cool Roof Waterproofing in Tarragona: Rayston Proof PU Plus 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?
House Cool Roof Waterproofing in Tarragona: Rayston Proof PU Plus 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 250 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 House Cool Roof Waterproofing in Tarragona: Rayston Proof PU Plus 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 QC
Named on this project. The data sheet carries the application window and the typical figures.
07 · FAQ
Frequently asked questions
Where is this project?
House Cool Roof Waterproofing in Tarragona: Rayston Proof PU Plus. España – Cataluña
When was the work done?
2025.
Which products were used?
Impermax QC.
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
