Roof Paint Blistering

Moisture in the substrate e g.

Roof paint blistering.

Inspect the membrane for possible. If water infiltration is suspected open the membrane and inspect the insulation. Dark colour which absorb a lot of heat applied over light colours will force the moisture air vapour to the. Another way to minimize blistering is to utilize a cool roof coating such as ge enduris coating in white.

In summary blistering and bubbling are common coating problems that occur for several different reasons. How to prevent roof blisters keep dry. There are differing opinions as to the damage that can result from blisters and bubbles. When you have no shade to block direct sunlight to a roof small blisters can form.

Poor attic ventilation is another reason blisters will appear. The type of paint blemish you describe also known as blistering is a result of the paint losing its adhesion to the base coat of paint or substrate the underlying surface such as drywall. Using a white colored coating will help to keep roof temperatures down. Coating roofs too soon after heavy rains or washing leaves roofs vulnerable to blistering as does coating roofs with frost or condensation present.

Remove the membrane from the blistered area down to the existing substrate. The usual causes of blistering include. Coating roofs just before it rains is poor timing. Blisters often occur when excessive heat damages the roofing materials.

While this article presents and discusses the osmotic mechanisms that produce blisters bubbles have several causes. Another blister prevention tip is to make sure your materials have firm contact between them for. This will reduce water vapor development decreasing the incidence and severity of blistering. What causes a blistering roof.

If moisture level in timber is over 15. Poor substrate preparation to eliminate unsound aged paint films. Recoating tinted roofs coated with a dark color or asphalt emulsion on a hot day also can result in flash drying and blistering.