Flashing at Sills New Windsor NY

Sill flashing in New Windsor controls water that penetrates through the masonry sill and helps control water penetrating the perimeter sealant joint around the windows. The sill flashing will prevent water from saturating the top of the masonry beneath the sill.

Local Companies

Capitol Electrical Contracting, Inc.
(845) 255-7088
286 McKinstry Road
Gardiner, NY
Medicom Management Svces Inc
(845) 565-9400
484 Temple Hill Rd
New Windsor, NY
Good Works Service Corp
(718) 246-5000
365 Jay St
Brooklyn, NY
Medical Records Management Corp
(718) 854-1543
3802 14th Ave
Brooklyn, NY
Management Vision Inc
(212) 987-4300
177 E 87th St
New York, NY
Lighting New York
845-786-LITE (5483)
4 Carol Street
West Haverstraw, NY
JR Electric Service Inc.
(845) 255-4088
PO Box 243
New Paltz, NY
Volt 2000
(718) 859-2416
980 E 35th St
Brooklyn, NY
American Cash Solutions
(631) 368-1987
384 Larkfield Rd
East Northport, NY
Drake Beam Morin Inc
(585) 292-0190
135 Corporate Woods
Rochester, NY

Provided By:

Source: MASONRY CONSTRUCTION MAGAZINE
Publication date: July 1, 2000

Why do people install flashings beneath masonry sills? Are they required if a single-piece stone sill is used?

Sill flashing controls water that penetrates through the masonry sill and helps control water penetrating the perimeter sealant joint around the windows. The sill flashing will prevent water from saturating the top of the masonry beneath the sill. These flashings are especially important when using rowlock brick sills or other sills that have many joints. Multiple joints increase the risk of developing excessive water penetration into the masonry below.

In hot humid climates, sill flashings may also be helpful in preventing hot humid cavity air from condensing on the underside and perimeter of the window. In this case, the sill flashings should be integrated with a cavity seal at the window head and jambs.

When using a single-piece stone or precast concrete at a window, the flashing is less important. Very little water will penetrate a single-piece stone or concrete sill. Flashings, however, are still useful in controlling water penetration at perimeter sealant joints or preventing hot humid cavity air from reaching the perimeter of the window. Where flashing is not used, the stone or precast concrete sill should project beyond the face of the masonry and contain a drip. This will prevent water penetration at the joint beneath the sill. This joint will often crack due to differential m...

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