glass and with gutters for the collection of condensation; that glass is set on felt or in putty, as prescribed; and that caps are set and adjusted to be watertight without imposing restraint or strain on the glass.

Skylights may be provided by installing corrugated glass in panels on roofs of corrugated types. As the inspector, you must be sure that glass is of the type, thickness, and size specified; that the glass is fastened securely but without restraint or strain; and that the installation is made completely watertight.

GLAZING

Glass may be clear window, polished plate, processed, rolled figure sheet, figured plate, wire, prism, corrugated, safety, or heat-absorbing.

You must make sure that the glass for each location is of the type, grade, thickness, surface finish, color, and size specified and that conforms to include metalwork and steel structures, woodwork, and concrete work. To inspect different types of jobs, you must know what to look for in each type of surface.

PAINTING

As an inspector, you need a thorough knowledge of paint material, equipment, painting procedures, and disposal. You must also be able to inspect both exterior and interior jobs involving different types of surfaces, such as metalwork, woodwork, and concrete work.

"Paints that are on the market today may not be on the market tomorrow." The never-ending advancement in technology and environmental restrictions in today's society will find new methods in the way of new paint materials, equipment, and in the way we paint. Many products today come either primed for painting or have a "baked on enamel" finish, ready to install.

Paint materials have really changed over the years. Technology has gone from lead-based paints to lead-free paints, from enamel to water-based (latex) enamel, which is much safer for the environment, and so on. Remember, if you need to rehab an old building and paint removal is necessary, you are probably looking at a lead-based surface. If this is the case, check with the safety officer, the environmental officer, or the ROICC, so he or she can sample the exterior paint for lead. Also, when painting, make sure the paints are applied at temperatures above 40°F. Preparation is the key to any good paint job.

Exterior Painting

The inspection of exterior work includes steel structures and woodwork. To inspect different types of jobs, you must know what to look for in each type of surface.

STEEL STRUCTURES. - Thorough preparation of the surfaces to be painted is the most important and the most frequently slighted element of good painting. Preparation of surfaces is of particular importance when paints with synthetic resin vehicles are to be used because they require exceptionally clean, dry surfaces for satisfactory results. As the inspector, you must be sure that steel surfaces are cleaned by wire brushing, sandblasting, gritblasting, flame cleaning, cleaning with solvent, or airblasting, as may be specified; that all surface rust, dirt, grease, oil, and loose scale are removed; and that tight scale is also removed if so specified. When the use of chemical rust removers is specified or permitted, you must make sure that the preparation is of an approved type and is brushed on thoroughly and allowed to dry; and furthermore, that all loose material is brushed off. Galvanized surfaces must either be treated with diluted muriatic, phosphoric, or ascetic acid, rinsed, and allowed to dry or be treated with the approved proprietary treating agents, as may be specified.

You must be sure that ready-mixed paint, which tends to settle in the container, is thoroughly remixed to uniform consistency either by hand or power stirring. Usually, it is necessary that the lighter fluid be poured off into another clean container, that the heavier residue be stirred until it is uniform, and then the lighter liquid be added gradually, with continuous stirring, until the paint has been worked to a smooth, even, homogeneous mixture. You must also make sure that paints delivered with pigments and vehicles in separate containers are similarly mixed, preferably with power stirrers. You must make sure that thinning is permitted only when specifically authorized and that the amount of thinner added is limited to the minimum required for satisfactory application.

You must be certain that paint is applied only under satisfactory atmospheric conditions. The specifications usually specify the minimum temperatures at which painting may be done. You must ensure that paint is not applied in a highly humidor rainy atmosphere or when condensation on the metal surface may occur and that the paint surface is visually dry before permitting painting to proceed. Specifications may prescribe application by brush or spray or permit either method.