Veneer Appearance. Section TI Page 1

Transcription

1 Section TI Page 1 Veneer Appearance The beauty of a Parveneer door face is determined by veneer species and the way the log is cut relative to its annual rings. Wood veneer is a natural material exhibiting great variation in texture, grain, colour and figure. Various methods of cutting are used to enhance (or in some cases, minimize) these natural wood characteristics. It is important to understand that no two logs are identical, so it is impossible to exactly duplicate chosen characteristics over a large run of doors or panels. Please allow us to help you in the design process. Our knowledgeable staff is more than happy to assist you. The following drawings depict the various ways used to cut fine wood veneers: Flat Cut (Plain Sliced) Veneer is sliced parallel to a line drawn through the centre of the log, resulting in both cathedral and straight grain patterns. The individual pieces of veneer are kept in the order in which they were sliced, permitting a natural grain progression when assembled into veneer faces. The straight grain sections of the slice occur at the edges, and are known as false quarters if they are clipped and assembled on their own. Quarter Cut: The log is sliced along its radius, resulting in straight grain with no cathedrals. Some species produce stripes and others a natural distribution of ray flecks (flake). Because the width of each leaf is restricted to the radius of the log, the average width of quarter cut veneer is less than flat cut. Drawings reprinted with the kind permission of Saunders Wood Specialties Inc. Eau Claire, WI Quarter cut Douglas fir (and other softwood species) is known as edge grain or vertical grain (VG) Rift Cut: The term rift is mistakenly applied to any number of wood species, but actually refers solely to a method of cutting red and white oak. Rift cut oak has minimal flake and a more emphasized vertical grain than quarter cut oak. Rift veneer is often cut on a half round lathe. A variation of rift cut is comb grain, where the vertical grain is particularly tight and straight. Rotary Cut: Rotary veneer is cut on a lathe (like pulling bathroom paper off the roll). The resulting grain pattern is bold, and is difficult to match and control.

2 Section TI Page 2 Veneer Matching Veneer matching refers to the method used to place together individual leaves of veneer. Book Match: This is the most common way to match, particularly in flat (plain) sliced veneers. Every other leaf is turned over, resulting in adjacent pieces being a mirror image of one another, and maximizing continuity of grain. Book matching presents a problem in finishing, particularly in certain species such as white maple. Because every second piece has been turned over, the veneer surfaces reflect light in two different ways, resulting in the perception of a light/dark pattern across the veneer face commonly known as barber poling. In addition the two surfaces often take stain differently, and a noticeable colour variation can result. Neither condition is a manufacturing defect. Slip Match: Adjoining pieces of veneer are arranged in sequence, but are not turned over, thus minimizing the barber pole effect. The grain pattern repeats, but without the mirror image. Slip matching is most often used with quarter cut or rift cut veneers. Random Match: As the name suggests, veneer leaves are taken at random from a variety of logs to produce a rustic lumber appearance. y veneer is cut on a lathe (like pulling bathroom paper off the roll). The resulting grain pattern is bold, and is difficult to match and control. The following pages show how these matched veneers may be assembled to become door or panel faces. Drawings reprinted with the kind permission of AWI

3 Section TI Page 3 Face Matching Face matching refers to the way veneer leaves are assembled into one or a series of door or panel faces. Centre Balance Match: This is the Parveneer standard because it results in the most pleasing look for doors and panels. AWI/AWMAC specifications require centre balance matched faces for Premium Grade. Centre balance match faces are always made up using an even number of uniform width veneer leaves. The result is a veneer joint running vertically down the centre of the door or panel, and a perfectly symmetrical appearance. Because this method of matching reduces veneer yield, it is somewhat more costly than other techniques. Balance Match: Balance match faces are made up using either odd or even numbers of uniform width veneer leaves. Veneer faces are thus mostly symmetrical, but the pattern can run out along one edge. Balance match does not meet the AWI/AWMAC requirements for Premium Grade. Running Match: This method allows leaves of unequal width, and as many pieces as are necessary to complete the face. It results in an asymmetrical appearance. Running match meets the AWI/AWMAC standards for Custom Grade. Drawings reprinted with the kind permission of AWI

4 Section TI Page 4 Face Matching (cont.) Face matching refers to the way veneer leaves are assembled into one or a series of door or panel faces. Pair Match: This is the Parveneer standard for doors hung in pairs or in close proximity (e.g. a series of doors progressing down a hallway, all within sight of one another.) AWI/AWMAC specifications require pair matched faces for both Premium and Custom Grades. Set Match: Doors hung in adjacent sets must be set matched to meet the requirements of AWI/AWMAC Premium Grade. Drawings reprinted with the kind permission of AWI

5 Section TI Page 5 Face Matching (cont.) Face matching refers to the way veneer leaves are assembled into one or a series of door or panel faces. Doors with Transoms Transoms may be specified as panels above the door separated by a frame header, or as fixed panels in the same frame as the door. If mounted in the same frame, the joint between the door and the transom is usually rabbetted. Parveneer builds such assemblies with the #1 edge on the top of the door and the bottom of the transom panel. There are several ways to match veneers between doors and transoms. It should be noted that some misalignment of pattern between door and transom is allowed under AWI/AWMAC specifications. Please call Parveneer for details. Continuous Match: This is the Parveneer standard for doors and transoms. It is limited only by available lengths of veneer, dependent on species and cut specified. In Continuous Match, the same piece of veneer is used as the face of both door and transom panel. End Match: End matching allows one piece of veneer for the door, with a mirror image match at the transom. Both End and Continuous matched doors and transoms meet the AWI/AWMAC specifications for Premium and Custom Grades. Drawings reprinted with the kind permission of AWI

6 Section TI Page 6 Drawing reprinted with the kind permission of AWI Face Matching (cont.) Face matching refers to the way veneer leaves are assembled into one or a series of door or panel faces. Blueprint Matched Panels, Doors & Frames: Parveneer is proud to offer a controlled, coordinated source for wood doors, architectural panels and veneered door and lite frames. This capability allows architects and contractors to control grain characteristics and progression within a project. Pre-manufactured Sets: Parveneer can produce sets of veneered panels, in standard sizes or cut to size, and with raw or finished edges. Please contact us with your requirements.

7 Section TI Page 7 Handing & Bevel The hand of a door is always determined from the key side usually the corridor, exterior or small side of the door (the side where the hinges are not visible when the door is closed). The key side of a closet door is its room side. The key side of twin communicating doors is the space between them (the small side for each). Standard handed doors push away from the person standing on the key side. Reverse handed doors pull toward the person standing on the key side. Bevel: The small side of the door is so called because its width is reduced by the bevel machined into the long edges. Doors must be specified as square edge (SE), beveled one edge (B1E) or beveled two edgers (B2E). Parveneer s standard bevel is 3 o, resulting in a reduction in width of approximately 3mm (1/8 ) on a 1 ¾ thick B2E door. Drawing reprinted with the kind permission of AWI

8 Section TI Page 8 AWI says that #1 edge doors are not available in all areas. Now why would that be? Parveneer ships #1 edge doors all over North America True #1 edge doors are virtually indistinguishable from solid lumber. Their beauty and durability is unmatched by any other door edge. Drawing reprinted with the kind permission of AWI The Parveneer #1 edge The Parveneer #1 edge is the best available, bar none! We begin by milling our own top grade matching hardwood lumber. We then securely glue these edges to the door core and hardboard cross bands, using side pressure in a hot press. The door blank is then carefully sanded before returning to the hot press to receive matching face veneers Parveneer architectural doors are a perfect melding of same species lumber and veneer, using a proven method that virtually eliminates telegraphing. Our #1 edge is a durable flexible choice that cannot be duplicated by veneered edges. Parveneer is your natural choice for Premium Grade millwork interiors.

9 Parveneer Standard Door Edge Details Section TI Page 9

10 Parveneer Standard Raised Panel Details Section TI Page 10

11 Parveneer Standard Flat Panel and Glazing Details Section TI Page 11

12 Section TI Page 12 Parveneer Standard Applied Moulding Details Please note the following restrictions when solid wood surface mouldings are applied to fire rated doors: 20 minute unlimited surface area, at least 1 from door edges and 3 ½ from lite cutouts. 45, 60 and 90 minute - Maximum moulding dimensions: 1 ½ wide x ¾ thick. Limited to 20% of door area, and at least 1 from door edges and 3 ½ from lite cutouts.

13 Section TI Page 13 Parveneer Metal Inlays Parveneer can label doors up to 20 minutes with metal or wood inlays as shown. If face reveals are 1/8 (3mm) x 1/8 (3mm) or smaller, they are usually machined directly into the hardboard or MDF cross band. This method results in a pleasing look under most finish conditions, and a more economical solution than wood inlays. Parveneer Face Reveals

14 Section T1 Page 14 Storage & Handling Instructions for Parveneer Flush and Stile & Rail Doors 1. Immediately after delivery, store doors at least 4 off a level surface in a clean, dry, well ventilated enclosed building having an operational HVAC system. Protect against sunlight, extremes of heat and cold, and changes in relative humidity. Relative humidity must be kept within the range of 25% - 60%. Door pallets must be well supported and level. 2. To qualify for warranty protection, inspect all doors within 10 days of receipt and report any and all deficiencies immediately to Parveneer. 3. Cover stack of doors to allow air circulation but to exclude light. 4. If doors have not been factory finished they must be completely sealed (including edges) within 5 days, using at least two coats of good quality paint, varnish or lacquer. 5. Handle doors using clean gloves, taking care not to drag one door across another or any other surface. 6. Before installation allow doors to acclimatize for at least 72 hours to finished building conditions. 7. Take care not to impair the strength or utility of doors when fitting to the opening, installing hardware, louvers, plant-ons or any other detailing. 8. Any machining of fire rated doors must be done by a licensed fabricator. Failure to comply with this regulation will void the label. 9. Doors pre-finished at the factory must be checked against the approved finish sample prior to installation. Installation of pre-finished doors constitutes acceptance of the product. 10. Use two hinges for doors up to 124 mm (60 ) in height, three hinges for doors up to 2286 mm (90 ) in height and one additional hinge for every 762 mm (30 ) of height or portion thereof. Pilot holes must be drilled for all hinge screws, and full thread screws are recommended. 11. If non-rated doors must be fitted for width, trim equally from both sides. Fire rated doors cannot be trimmed for size except by a licensed fabricator. The above recommendations form part of the Parveneer warranty, and must be followed to keep warranty in force.