Roof Paint Blistering

Poor substrate preparation to eliminate unsound aged paint films.

Roof paint blistering.

When you have no shade to block direct sunlight to a roof small blisters can form. What causes a blistering roof. The number one rule for preventing commercial roof blisters is to use dry materials in dry settings. Using a white colored coating will help to keep roof temperatures down.

If water infiltration is suspected open the membrane and inspect the insulation. This will reduce water vapor development decreasing the incidence and severity of blistering. If it is determined that blister removal is required the following procedure should be followed. 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.

Blisters often occur when excessive heat damages the roofing materials. Another blister prevention tip is to make sure your materials have firm contact between them for. Remove the membrane from the blistered area down to the existing substrate. Poor attic ventilation is another reason blisters will appear.

Coating roofs too soon after heavy rains or washing leaves roofs vulnerable to blistering as does coating roofs with frost or condensation present. Moisture in the substrate e g. In summary blistering and bubbling are common coating problems that occur for several different reasons. Whether you have a.

If moisture level in timber is over 15. While this article presents and discusses the osmotic mechanisms that produce blisters bubbles have several causes. Recoating tinted roofs coated with a dark color or asphalt emulsion on a hot day also can result in flash drying and blistering. Inspect the membrane for possible.

Dark colour which absorb a lot of heat applied over light colours will force the moisture air vapour to the. Coating roofs just before it rains is poor timing. Another way to minimize blistering is to utilize a cool roof coating such as ge enduris coating in white.