Roof with Torn Membranes: Stripped, Foam-Insulated and Waterproofed Again

1. Torn membranes

The joints of the old membranesBitumen membraneWaterproofing that comes in rolls of reinforced bitumen. It is torched onto the roof in sheets that overlap at the seams. had opened and pieces had lifted. Water was getting in underneath the insulationThermal insulationA layer of material that lets heat through only slowly, so a home keeps its warmth in winter and stays cool in summer. there.

2. Stripping

A membrane that has come unstuck can't be fixed with patches. It has to come off completely.

3. Cleaning and priming

With the membranes gone, the real state of the slab shows. It is cleaned and primedPrimerThe thin first coat that goes on before the main material. It binds dust, seals the pores and helps paint or waterproofing stick firmly. so the foamSpray polyurethane foamA foam sprayed on as a liquid that expands on the spot and sets into one seamless layer. It insulates against heat and cold and closes cracks and joints. bonds well.

4. Spray polyurethane foam

Spray polyurethane foam goes over the whole surface and up the parapetsParapetThe low wall around the edge of a flat roof or balcony. The joint between it and the floor is one of the most common places for leaks.. It is one layer with no joints, so there are no seams left to open up.

5. A liquid membrane on top

A white liquid polyurethane membrane (Hyperdesmo) goes over the foam, waterproofingWaterproofingThe work and materials that stop water getting through on flat roofs, balconies, bathrooms, basements, planters and tanks. it and protecting it from the sun. It wraps the air-conditioner stands and chimneys, the most vulnerable spots, on every side.

6. The result

One continuous white roof that reflects the sunCool roof coatingA white or very light top coat that reflects much of the sun's radiation, so the roof and the floor below heat up less. and has no more places for water to get through.