Flashing at Sills White Plains NY

Sill flashing in White Plains 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

Weiss & Biheller
(212) 979-6990
440 Nepperhan Avenue
Yonkers, NY
Enhanced Home
914-560-4100
163 North Main Street
Port Chester, NY
Renaissance Electric Corp
(718) 515-2853
4039 Laconia Ave
Bronx, NY
United States Government
(914) 948-3907
120 Bloomingdale Rd
White Plains, NY
Delphi Consulting Group Inc
(914) 684-2400
399 Knollwood Rd
White Plains, NY
Himalayan Lights
(212) 877-2159
200 W. 86th Street
New York, NY
Lighting New York
845-786-LITE (5483)
4 Carol Street
West Haverstraw, NY
Public Power & Utility Inc
203-333-6969
3 Parklands Drive
Darien, CT
Montrose Managmnt Assocs
(914) 682-1408
33 Oak St
White Plains, NY
Pheobola Managmnt Inc
(914) 697-7554
70 W Red Oak Ln
White Plains, 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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