The protection of building materials on the site and their storage before use are very important. If materials are stored without protection in Inclement weather, damage may be caused that could be reflected in wastage of material and troublesome construction defects.
As much as possible, material should be delivered to the site just before it is to be used. This is especially true of exterior window and door frames and exterior trim materials. Interior finishing materials may be stored in the house once the roof is on.
In the normal staging of construction, the framing lumber and sheathing materials are delivered to the job after the foundation is complete. Structural and framing materials in place before the house is enclosed will be subject to wetting during rainstorms, but the moisture is mostly on the exposed surfaces and can dry out quickly in subsequent dry weather without causing damage.
Lumber stored in close piles, however, may soak up and retain water, causing very slow drying out. This condition should be avoided because it may lead to staining and decay. Piles of lumber should be placed on skids raised off the ground and covered with sheets of waterproof material to shed water. Sheets of polyethylene may also be placed on the ground, under the skids to prevent ground moisture from wetting the lumber.
After the framing is started, the roof shingles may be delivered. Asphalt shingles should be stored so that the bundles can lie flat without bending. Using curved or buckled shingles will result in an unattractive roof.
Windows and doors are usually the next items to be installed after the roofing. If the frames are delivered before they can be installed, they should be sheltered until they are used. Good frames are costly items, and exposure to the weather may nullify their good construction. This is especially true where the frames are delivered with the window sash installed.
Insulation, interior wall and ceiling finish, wood siding and similar items can be stored in the house. Heavy materials such as gypsum wall-board should be distributed over the floor area in order not to overload the floor joists. Heavy loads, concentrated on one spot for any appreciable time, may cause permanent deflection in the floor joists.
Hardwood flooring, interior trim and millwork should not be stored in the house until the basement floor has been completed and allowed to dry. The curing of the slab gives off moisture which may cause the kiln-dried material to swell, resulting in shrinkage after the materials are installed.
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