Top Menu
Resource Menu
The term “balding” is used to describe a defined area of granule loss on an asphalt shingle that is typically the result of a manufacturing problem. Premature granule loss, or balding, can result from improper application of the shingle granules, impurities on the fiberglass mat, problems the asphalt mix, etc. The photograph below shows a […]
Volatiles in the asphalt can build up as vapor blisters beneath the granule layer. Eventually, the top of the blister pops or weathers away, exposing an open-centered dome or crater-like cavity. Heat blisters are not depressions but result from raised domes on the shingle surface. New blisters have sharper, more defined edges where aged blisters […]
Rot reduces the strength, stiffness, and bearing capacity of structural wood members. As the wood deteriorates, the affected members lose their ability to resist bending. A weakened joist may sag between supports, causing visible deflection such as sloping floors, soft spots, gaps at baseboards, cracked finishes, or doors that no longer close correctly. If rot […]
Settlement occurs for a combination of reasons related to the preparation and compaction of the soil, which may include the presence of organic materials, the effects of vegetation, and the natural raising and lowering of the ground water table which contributes to the consolidation of soil over the years. Foundations rely on uniform, stable support. […]
Plumbing systems are generally placed in floors and walls. Plumbing systems can be categorized as pressurized or non-pressurized (drainage). Pressurized plumbing leaks range from a gushing spray to barely noticeable pinhole leaks. Drainage system leaks usually manifest as less water or seepage that is sometimes accompanied by an odor. Typical causes of supply leaks are […]
Proper ventilation is important for an enclosed attic to prevent condensation from accumulating in the attic. This is because warmth and humidity naturally tends to ventilate through openings such as light fixtures, and through the ceiling assembly itself. If attic ventilation is insufficient, moisture can build in an attic and eventually lead to problems. Excess […]
Moisture in attic spaces can originate from several sources and may lead to mold growth, wood rot, and insulation or ceiling damage. Aside from roof leaks, one of the most common causes is inadequate ventilation. Another potential source of attic moisture is air conditioning condensate leaks. Household activities such as cooking, bathing, and laundry generate […]
This discussion will cover various causes of roof leaks. It only considers the plane of the roof itself, and does not consider potential sources of leaks in attic spaces (between the interior ceiling and roof). Such attic sources of leaks are discussed here.
Vapor drive is the diffusion of moisture in the form of a gas or vapor through a material. If unimpeded, the vapor is usually dispersed to the atmosphere. Obstructions of this water vapor’s travel through a building envelope can result in condensation and eventual water damage to flooring or other elements at a building’s envelope. […]
Window and door leaks are a common occurrence. They result from a number of causes, including installation errors regarding sealing and flashing, deterioration of the sealants, water seepage, and wind-driven rain. Careful detailing is required during the installation of window and doors. Recommended flashings and sealant methods vary with circumstances, and are therefore not discussed […]
