WOOD & MOISTURE
All hardwoods shrink and expand with heat, humidity, lack of humidity and cold. In humid and hot summer months hardwoods will expand, in cold winter months hardwoods will shrink. In both instances hardwood material can grow or contract causing joints and finishes to crack. Expansion and contraction are most noticeable where perpendicular grain wood components are fabricated to parallel grain components. The issue and wood growing and shrinking can be controlled but not eliminated with environments that are temperature and humidity controlled on a continues basis. Porta Door goes through pain staking efforts to ensure the highest quality materials, we cannot, however, be responsible for products that are not in a controlled environment. It is best to make you clients aware of the ramifications of severe changes or lack of controlled environmental conditions. Some of the effects of moisture. Cope & Stick Products • Rails will expand beyond the ends of stiles. • Joints and Finishes will crack. • Solid hardwood panels will expand and crack frame joints. • Solid wood panels will swell on the body of each panel leaf and will not at the glue edge causing an panel waving effect. Mitered Products • Stiles & Rails will expand causing joints to open on at the outer edges on the product. • Stiles & Rails while contracting will cause joints to open on the inner portion of the stile and rail. • Doors may bellow in the midsection of the product. • Open joints of mitered products are more prevalent due to the nature of the joint. Both Stiles and Rails will expand or contract at the same rate in the perpendicular directions, opposed to a cope and stick joint expanding or contracting in opposite directions. PORTA DOOR USES THE FINEST MATERIALS, EQUIPMENT AND ADHESIVES TO CREATE AND PRODUCE A LONG LASTING AND DURABLE PRODUCT. COPE AND STICK DOORS ARE AVAILABLE WITH THE ADDED FEATURE OF TENONED DOWELED JOINTS, THIS METHOD OF CONSTRUCTION WILL ENSURE NON-JOINT MOVEMENT, IT MAY HOWEVER CREATE OTHER EFFECTS ON MATERIAL SHRINKGE OR EXPANSION. PRODUCT BELLYING, TWISTING OR WARPING MAY RESULT FROM THIS ADDED CONSRTUCTION METHOD. Other Possible Considerations Hardwood needs stable room conditions in order for joints to remain tight. To minimize moisture related expansion and contraction, your product must be in a climate controlled environment. Your product should be further finished within a reasonable period of time. Improper storage and handling will increase the chances of hardwood movement. Medex products . Humid or dry conditions will cause flat panel products to warp, we recommend that flat panel products are storage on a flat surface as opposed to leaning upright.
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65 Cogwheel lane, Seymour, Ct. 06483 (203) 888-6191 fax (203) 888-5803 Email info@portadoor.com www.portadoor.com
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