Roof waterproofing with Hyperdesmo in Ilion, Peristeri and all of Athens
Roof waterproofing: Central Athens · Ilion · Peristeri · Petroupoli · Agioi Anargyroi · Kamatero · Ano Liosia · Acharnes · Aigaleo · Chaidari · Agia Varvara · Korydallos · Nikaia · Keratsini · Piraeus · Moschato · Kallithea · Nea Smyrni · Palaio Faliro · Alimos · Argyroupoli · Elliniko · Glyfada · Voula · Vari · Vouliagmeni · Ilioupoli · Dafni · Vyronas · Kaisariani · Pangrati · Koukaki · Zografou · Papagou · Cholargos · Agia Paraskevi · Chalandri · Vrilissia · Melissia · Penteli · Marousi · Kifisia · Nea Erythraia · Ekali · Pefki · Lykovrysi · Metamorfosi · Nea Ionia · Nea Filadelfeia · Irakleio · Galatsi · Psychiko · Gerakas · Pallini · Glyka Nera · Paiania · Koropi · Markopoulo
Damp coming through the roof ruins plaster, paint and rebar, and makes a home unhealthy. With Hyperdesmo polyurethane membrane we create a continuous, elastic, seamless layer that stops water and stands up to the Greek sun.
Hyperdesmo by Alchimica is a liquid polyurethane membrane. It is applied by roller or brush, cures with the moisture in the air and becomes a single elastic sheet that follows the roof's movement without tearing. The white version reflects sunlight and keeps the top floor cooler in summer.
We waterproof flat roofs, balconies, planters and pitched roofs in Ilion, Peristeri and all over Athens. The result depends mostly on preparation, so we always do it thoroughly.
How we apply Hyperdesmo: step by step
Inspection and moisture check
We check the roof, its falls, the drains and the moisture in the concrete. The substrate must be dry (moisture up to about 5%) for the membrane to bond.
Removing old materials
We strip loose old waterproofing, blistered bitumen membranes, loose tiles and mortar.
Pressure washing
We wash the roof with a pressure washer, removing dust, oil, moss and cement laitance, and let it dry fully.
Repairs and cracks
We open and fill cracks, repair broken areas and form coves at wall-floor corners so the membrane doesn't break at sharp edges.
Priming
We apply the right Alchimica primer for the substrate (concrete, tiles, old membrane). The primer seals the pores and secures adhesion.
Reinforcing cracks and corners
At cracks, corners and around drains and pipes we lay Hyperdesmo with embedded polyester fabric, where the structure moves most and needs reinforcement.
First coat of Hyperdesmo
We mix at low speed and roll out the first coat, about 0.7–0.9 kg/m², over the whole surface and up the parapets.
Second coat, crosswise
After 6 to 24 hours (and never more than 48) we apply the second coat crosswise, about 0.8–0.9 kg/m². In total the membrane reaches at least 1.5–1.8 kg/m².
UV topcoat (optional)
Where the roof gets foot traffic or a stable colour is wanted, we finish with aliphatic Hyperdesmo-ADY, which doesn't yellow in the sun.
Curing and final check
We let the membrane cure with no rain and no foot traffic, check the drains and hand over.
- UV topcoat (Hyperdesmo-ADY)≈0.5 kg/m²
- 2nd coat of Hyperdesmo · crosswise0.8–0.9 kg/m²
- 1st coat of Hyperdesmo0.7–0.9 kg/m²
- Polyester fabric at cracks & corners
- Alchimica primer
- Concrete slab · clean & dry
When does a roof need waterproofing?
- When damp stains, mould or blistering appear on the top-floor ceiling.
- When the old waterproofing has cracked, come loose or blistered.
- When water pools after rain.
- When the top floor is very hot in summer: a white membrane reflects much of the sun's radiation.
Besides flat roofs, we waterproof balconies, planters, pitched roofs, basements and foundations, and install external thermal insulation to save energy.
Photos from our projects
Roof waterproofing across Athens
We take on roof waterproofing in every area of Athens and Attica. Some of the areas we work in often:
- Roof waterproofing Central Athens
- Roof waterproofing Ilion
- Roof waterproofing Peristeri
- Roof waterproofing Petroupoli
- Roof waterproofing Agioi Anargyroi
- Roof waterproofing Kamatero
- Roof waterproofing Ano Liosia
- Roof waterproofing Acharnes
- Roof waterproofing Aigaleo
- Roof waterproofing Chaidari
- Roof waterproofing Agia Varvara
- Roof waterproofing Korydallos
- Roof waterproofing Nikaia
- Roof waterproofing Keratsini
- Roof waterproofing Piraeus
- Roof waterproofing Moschato
- Roof waterproofing Kallithea
- Roof waterproofing Nea Smyrni
- Roof waterproofing Palaio Faliro
- Roof waterproofing Alimos
- Roof waterproofing Argyroupoli
- Roof waterproofing Elliniko
- Roof waterproofing Glyfada
- Roof waterproofing Voula
- Roof waterproofing Vari
- Roof waterproofing Vouliagmeni
- Roof waterproofing Ilioupoli
- Roof waterproofing Dafni
- Roof waterproofing Vyronas
- Roof waterproofing Kaisariani
- Roof waterproofing Pangrati
- Roof waterproofing Koukaki
- Roof waterproofing Zografou
- Roof waterproofing Papagou
- Roof waterproofing Cholargos
- Roof waterproofing Agia Paraskevi
- Roof waterproofing Chalandri
- Roof waterproofing Vrilissia
- Roof waterproofing Melissia
- Roof waterproofing Penteli
- Roof waterproofing Marousi
- Roof waterproofing Kifisia
- Roof waterproofing Nea Erythraia
- Roof waterproofing Ekali
- Roof waterproofing Pefki
- Roof waterproofing Lykovrysi
- Roof waterproofing Metamorfosi
- Roof waterproofing Nea Ionia
- Roof waterproofing Nea Filadelfeia
- Roof waterproofing Irakleio
- Roof waterproofing Galatsi
- Roof waterproofing Psychiko
- Roof waterproofing Gerakas
- Roof waterproofing Pallini
- Roof waterproofing Glyka Nera
- Roof waterproofing Paiania
- Roof waterproofing Koropi
- Roof waterproofing Markopoulo
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Frequently asked questions
Roof waterproofing
How long does Hyperdesmo roof waterproofing last?
It depends on the membrane thickness, preparation and how the roof is used. With the right amount of material and good preparation, a Hyperdesmo membrane protects the roof for many years, and a UV topcoat also keeps its colour.
Can new waterproofing go over the old one?
Often yes, if the old layer is well bonded. Anything loose or blistered is removed, and we use a primer suited to the existing surface.
What is the best season for roof waterproofing?
It needs a dry surface and about 5–35 °C with no rain for 1–2 days. Spring, summer and autumn are ideal; in winter we work on days with settled weather.
Does a white membrane keep the home cooler?
Yes. A white polyurethane membrane reflects much of the sun's radiation, so the slab heats up less and the top floor stays cooler.
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For information about our services, or to book a visit to your space. For a faster estimate, send us photos on Viber.