Roof Paint Blistering

The number one rule for preventing commercial roof blisters is to use dry materials in dry settings.

Roof paint blistering.

If moisture level in timber is over 15. Dark colour which absorb a lot of heat applied over light colours will force the moisture air vapour to the. When you have no shade to block direct sunlight to a roof small blisters can form. 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.

Another blister prevention tip is to make sure your materials have firm contact between them for. Blisters often occur when excessive heat damages the roofing materials. This will reduce water vapor development decreasing the incidence and severity of blistering. Remove the membrane from the blistered area down to the existing substrate.

Coating roofs just before it rains is poor timing. If water infiltration is suspected open the membrane and inspect the insulation. If it is determined that blister removal is required the following procedure should be followed. Inspect the membrane for possible.

Whether you have a. Recoating tinted roofs coated with a dark color or asphalt emulsion on a hot day also can result in flash drying and blistering. While this article presents and discusses the osmotic mechanisms that produce blisters bubbles have several causes. Coating roofs too soon after heavy rains or washing leaves roofs vulnerable to blistering as does coating roofs with frost or condensation present.

Using a white colored coating will help to keep roof temperatures down. Poor substrate preparation to eliminate unsound aged paint films. The usual causes of blistering include. Moisture in the substrate e g.

In summary blistering and bubbling are common coating problems that occur for several different reasons. Another way to minimize blistering is to utilize a cool roof coating such as ge enduris coating in white. Poor attic ventilation is another reason blisters will appear.