Roof Paint Blistering

Moisture in the substrate e g.

Roof paint blistering.

There are differing opinions as to the damage that can result from blisters and bubbles. The number one rule for preventing commercial roof blisters is to use dry materials in dry settings. Inspect the membrane for possible. Coating roofs just before it rains is poor timing.

Another blister prevention tip is to make sure your materials have firm contact between them for. Using a white colored coating will help to keep roof temperatures down. Dark colour which absorb a lot of heat applied over light colours will force the moisture air vapour to the. While this article presents and discusses the osmotic mechanisms that produce blisters bubbles have several causes.

How to prevent roof blisters keep dry. Remove the membrane from the blistered area down to the existing substrate. Poor substrate preparation to eliminate unsound aged paint films. Coating roofs too soon after heavy rains or washing leaves roofs vulnerable to blistering as does coating roofs with frost or condensation present.

If it is determined that blister removal is required the following procedure should be followed. When you have no shade to block direct sunlight to a roof small blisters can form. In summary blistering and bubbling are common coating problems that occur for several different reasons. Poor attic ventilation is another reason blisters will appear.

The usual causes of blistering include. Whether you have a. Blisters often occur when excessive heat damages the roofing materials. Another way to minimize blistering is to utilize a cool roof coating such as ge enduris coating in white.

Recoating tinted roofs coated with a dark color or asphalt emulsion on a hot day also can result in flash drying and blistering. If water infiltration is suspected open the membrane and inspect the insulation. If moisture level in timber is over 15.