It is the leading cause of the deterioration of trusses.
Rubber roof condensation problems.
And second the roof deck and rigid insulation form a reasonable interior vapor barrier.
Virtually the only negative for a rubber roof is appearance and even that drawback can be overcome with the use of rubber shingles or acrylic paint.
Usually this problem stems from either poor workmanship in installing the roof or insulation insufficient ventilation or excess moisture in the building.
Roof condensation has a very specific cause.
These roofs have few inter material condensation problems for two reasons.
It s no surprise that this tends to occur more in colder months when home heating is more common and intense.
First there is little air movement within the roof system to pump moisture laden air into the roof.
House has condensation problems and roofer plans to install single ply rubber app torch down over 75 base sheet nailed to deck.
In the case of the timber trusses and purlins they will rot and eventually lose their stability.
Roof condensation occurs when moisture becomes trapped between the roof and the insulation.
If your roof deck or insulation is developing water droplets chances are your forehead is too.
It can also have an effect on thermal insulation materials as the measured thermal performance reduces when increased moisture is present.
Picture a cloud of moisture floating overhead between the rafters.
If this problem is not caught early it can be a very expensive and possibly dangerous problem to fix.
That excess moisture ends up as drops of condensation on the roof.
Although moisture problems in the roof assembly can be due to waterproofing deficiencies don t neglect the effect of condensation.
As it cools it can t hold as much moisture.
The rapid cooling leads to immediate condensation.
Although condensation in roofs may not seem like a serious problem it actually is.
Warm wet air rises and meets the cold roof and cools.
Essentially condensation occurs at night when the temperature inside a building is warmer than outside.
Moisture occurs when heated air inside the home rises up to the roof where it meets the colder temperatures of outside air.
But with proper design and maintenance principles you don t have to sweat roof condensation issues.
Over time this excess moisture can lead to the unseen decay in roof timbers and fixings.
Condensation can cause a number of problems within a building particularly interstitial condensation which can occur inside the roof s structure.