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270:"Soft zinc" is a newer, proprietary flashing material. It is a relatively malleable material, making it useful for complex roofing connections. It provides normal soft soldering capabilities and delivers easy folding. Soft zinc is said to be an "environmentally friendly" replacement for lead flashing; like lead, it is recyclable, while avoiding lead-contaminated runoff.
221:. Copper and lead cannot be used in contact with or even above aluminium, zinc, or coated steel without an increased risk of premature corrosion. Also, aluminium and zinc flashing cannot be used in contact with pressure treated wood due to rapid corrosion. Aluminium is also damaged by wet mortar and wet plaster.
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Before the availability of sheet products for flashing, builders used creative methods to minimize water penetration. These methods included angling roof shingles away from the joint, placing chimneys at the ridge, building steps into the sides of chimneys to throw off water, and covering the seams
266:
Cold rolled (to 1/8-hard temper) copper is recommended for most flashing applications. This material offers more resistance than soft copper to the stresses of expansion and contraction. Soft copper can be specified where extreme forming is required, such as in complicated roof shapes. Thermal
346:
May be embedded in a wall to direct water that has penetrated the wall back outside, or it may be applied in a manner intended to prevent the entry of water into the wall. Wall flashing is typically found at interruptions in the wall, such as windows and points of structural
539:
Loudon, J. C.. An encyclopædia of cottage, farm, and villa architecture and furniture; containing numerous designs for dwelling ... each design accompanied by analytical and critical remarks .... London: Longman, Rees, Orme, Brown, Green, & Longman, 1833. 126.
38:
refers to thin pieces of impervious material installed to prevent the passage of water into a structure from a joint or as part of a weather resistant barrier system. In modern buildings, flashing is intended to decrease water penetration at objects such as
214:. Metal flashing should be provided with expansion joints on long runs to prevent deformation of the metal sheets due to expansion and contraction, and should not stain or be stained by adjacent materials or react chemically with them.
166:
Flashing may be exposed or concealed. Exposed flashing is usually of a sheet metal, while concealed flashing may be metal or a flexible, adhesive-backed material, particularly around wall penetrations such as window and door openings.
144:. The introduction of manufactured flashing decreased water penetration at obstacles such as chimneys, vent pipes, walls which abut roofs, window and door openings, etc., thus making buildings more durable and reducing indoor
254:
is an excellent material for flashing because of its malleability, strength, solder-ability, workability, high resistance to the caustic effects of mortars and hostile environments, and long service life
423:
A structure incorporating flashing has to be carefully engineered and constructed so that water is directed away from the structure and not inside. Flashing improperly installed can direct water
105:) is a term used when there are two parallel pieces of flashing employed together such as on a chimney, where the counter-flashing is built into the chimney and overlaps a replaceable piece of
359:
Used to waterproof pipes, supports, cables, and all roof protrusions. Stainless steel penetration flashings have proven to be the longest lasting and most reliable roof flashing type.
244:(sometimes known as kylar or hylar), and acrylic. The different types have different application temperature ranges, material adhesion compatibility, chemical compatibility, levels of
248:, and resistance to ultraviolet light exposure. Adhesive backed materials can aid installation, but such adhesives are not intended for long-term water-resistance.
113:, and the term is still used for the piece of flashing below a chimney. The up-hill side of a chimney may have a small gable-like assembly called a cricket with
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problems. It is also essential to prevent leaks around skylights or roof windows. Moreover, flashing is important to ensure the integrity of a roof prior to a
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263:. This enables a roof to be built without weak points. Since flashing is expensive to replace if it fails, copper's long life is a major cost advantage.
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in coastal areas may accelerate corrosion; so stainless steel, copper, or coated aluminium are recommended flashing materials near salt water.
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At the very bottom of a roof/wall intersection, the lowermost step flashing specially formed to deflect water away from the wall.
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was occasionally used as a flashing material. Most flashing materials today are metal, plastic, rubber, or impregnated paper.
493:
Oxford
English Dictionary Second Edition on CD-ROM (v. 4.0) © Oxford University Press 2009. Flash, n.4, flash, v.1, flashing,
664:
439:
associated with bulk use of this heavy metal. The Lead Sheet
Association touts its recyclability and extreme durability.
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736:
717:
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A general term for flashing a chimney to cover the intersections of the chimney and install a damp proof course (DPC)
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A concealed flashing placed under windows or door thresholds to prevent water from entering a wall at those points.
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313:(soakers) are properly installed underneath the roof and wall shingles and thus is not visible. HĂ´tel Demoret
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Flashings and copings, Copper in
Architecture Design Handbook, Copper Development Association Inc.,
43:, vent pipes, walls, windows and door openings to make buildings more durable and to reduce indoor
241:
435:
In the US and UK, at least, lead flashing and fittings are still readily available, despite the
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Shaped like a “U” or channel to catch water (e.g., where the edge of a tile roof meets a wall).
565:
Journal of the
Society for the Preservation of New England Antiquities, volumes 52-55 1961.19.
587:
Charles
Wardell, "Flexible flashing:Tips For Getting the Most Out of These Useful Products".
515:
202:
or a metal with a coating such as galvanized steel, lead-coated copper, anodized aluminium,
553:. Part 1. London, Oxford and Cambridge: Rivingtons, 1875. Chapter 10, Plumbers work. Print.
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http://www.copper.org/applications/architecture/arch_dhb/flashings_copings/intro.html
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An important type of potential chemical reaction between metal flashing materials is
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provided detailed instruction and is well illustrated with methods still used today.
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movement in flashings is prevented or is permitted only at predetermined locations.
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Weatherproofing seam between a stone chimney and a tile roof on a building in
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31:. The lead flashing is seen as light gray sheets at the base of the chimney.
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Sternthal, Daniel (2000). Copper flashings in contemporary construction,
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An
Encyclopædia of Cottage, Farm, and Villa Architecture and Furniture...
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Video series of still images showing some complex lead flashing work
109:. Strips of lead used for flashing an edge were sometimes called an
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885:
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Magazine of the
Construction Specifications Institute, October 2000
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gave instructions on installing lead flashing by 1832 and in 1875
125:. Flashing may be let into a groove in a wall or chimney called a
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875:
328:
Placed around discontinuities or objects which protrude from the
210:(aluminium-zinc alloy coated sheet steel), and metals similar to
40:
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Pieces of flashing material which overlap each other in "steps".
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Spans the thickness of the wall and directs water to weep holes.
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MetalTech-USA – Metal
Fabricator and Distributor in Atlanta
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or joints and in valleys where the runoff is concentrated.
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Moisture barrier sheathing with flashing tape can replace
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Flashing types are named according to location or shape:
83:
are uncertain, but may come from the Middle
English verb
768:
665:"Lead's Green Credentials – The Lead Sheet Association"
576:
684:
727:Ramsey, Charles (2000). Hoke John Ray, Jr. (ed.).
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398:Pipe flashing (pipe boot, vent boot, pipe flange)
1123:
755:Illustrated summary of various types of flashing
503:http://dictionary.reference.com/browse/flashing
685:Ching, Francis D. K.; Cassandra Adams (2001).
419:In the valley of two intersecting roof planes.
70:
784:
731:(10th ed.). John Wiley & Sons, Inc.
591:. vol. 32. no. 7. April 2014. 51-58. Print.
401:A product used where pipes penetrate roofs.
47:problems. Metal flashing materials include
791:
777:
712:(2nd ed.). McGraw Hill Book Company.
484:. Newtown, CT: Taunton Press, 2005. Print.
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277:
117:or on narrow chimneys with no cricket a
18:
693:(3rd ed.). John Wiley @ Sons Inc.
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182:Metal flashing materials include lead,
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726:
140:between roofing materials with mortar
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707:
482:Roofing, flashing & waterproofing
386:Step flashing (soaker, base flashing)
476:
474:
383:A metal used at the edges of a roof.
87:, 'to sprinkle, splash', related to
549:Smith, Percy Guillemard Llewellyn.
520:encyclopedia2.thefreedictionary.com
377:Often used above windows and doors.
13:
578:. New York: Momentum, 2013. Print.
14:
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746:
689:Building Construction Illustrated
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293:The flashing visible here is the
155:Builders' books, such as Loudons
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729:Architectural Graphics Standards
647:"Soft Zinc-RHEINZINK – Flashing"
759:Video on how to weld sheet lead
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639:
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392:Counter flashing (cap flashing)
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551:Notes on building construction
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161:Notes on Building Construction
1:
589:Journal of Light Construction
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710:Masonry Design and Detailing
604:December 2002 – January 2003
574:Schmid, Karl F. "Flashing".
170:
7:
634:The Construction Specifier,
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350:Sill flashing (or sill pan)
336:to deflect water away from
71:Etymology and related terms
10:
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246:volatile organic compounds
212:stone-coated metal roofing
134:
948:
937:
806:
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708:Beall, Christine (1987).
356:Roof penetration flashing
505:referenced 12 April 2013
273:
602:Metal Roofing Magazine,
395:Covers a base flashing.
374:Cap flashing (drip cap)
242:polyvinylidene fluoride
75:The origin of the term
67:, and other materials.
437:environmental concerns
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286:
32:
16:Construction technique
956:Air conditioning unit
753:Roof Flashing Details
600:The glory of copper;
368:Through wall flashing
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281:
22:
1137:Building engineering
563:Old-time New England
431:Environmental impact
200:architectural metals
1132:Moisture protection
1142:Building materials
480:Multiple authors.
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287:
234:rubberized asphalt
219:galvanic corrosion
33:
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516:"Counterflashing"
230:flexible flashing
175:In earlier days,
123:back pan flashing
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881:Half-hipped roof
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410:Kickout flashing
404:Chimney flashing
362:Channel flashing
206:-coated copper,
115:cricket flashing
95:Counter-flashing
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303:valley flashing
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29:Channel Islands
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1096:Solar panels
1011:Hanging beam
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906:Rhombic roof
896:Mansard roof
876:Gambrel roof
851:Conical roof
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709:
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673:the original
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1106:Weathervane
1081:Roof window
1051:Roof garden
1046:Roof batten
976:Collar beam
931:Tented roof
916:Saddle roof
911:Ridged roof
871:Gablet roof
831:Bochka roof
821:Barrel roof
816:Arched roof
808:Roof shapes
307:open valley
150:solar panel
1126:Categories
1111:Wind brace
1076:Roof truss
1071:Roof tiles
1061:Roof ridge
1041:Ridge vent
1001:Green roof
891:Onion dome
866:Gable roof
846:Clerestory
826:Board roof
465:References
459:Rainscreen
297:below the
223:Salt spray
177:birch bark
142:flaunching
65:zinc alloy
926:Shed roof
861:Flat roof
454:Housewrap
380:Drip edge
284:housewrap
228:Types of
208:galvalume
184:aluminium
171:Materials
53:aluminium
1086:Skylight
1056:Roofline
991:Flashing
966:Catslide
886:Hip roof
836:Bow roof
618:Archived
525:12 April
443:See also
347:support.
334:building
317:, France
301:and the
85:flasshen
81:flashing
41:chimneys
36:Flashing
971:Chimney
315:Moulins
305:in the
135:Purpose
1091:Soffit
1036:Rafter
1031:Purlin
1006:Gutter
981:Dormer
735:
716:
697:
540:Print.
309:. The
299:dormer
257:(see:
252:Copper
188:copper
128:reglet
57:copper
25:Jersey
1101:Spire
1016:Joist
996:Gable
986:Eaves
961:Attic
800:Roofs
338:seams
332:of a
295:apron
274:Types
204:terne
111:apron
89:flask
77:flash
1026:Loft
856:Dome
733:ISBN
714:ISBN
695:ISBN
527:2013
425:into
330:roof
196:zinc
146:mold
97:(or
79:and
49:lead
45:mold
121:or
1128::
667:.
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518:.
473:^
240:,
236:,
194:,
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785:t
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261:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
