Flashing at Sills East Aurora NY

Sill flashing in East Aurora 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

Preciosa International, Inc.
(716) 626-9759
2316 Wehrle Dr.
Williamsville, NY
Cooper Gene Acsw
(212) 686-6827
475 Park Ave
New York, NY
Konci Gnd Management Group USA Inc
(646) 613-9393
100 Lafayette St Ste 800
New York, NY
The Harry Management Corp
(914) 337-5614
81 Pondfield Rd
Bronxville, NY
Orange Lake Fire Dist Commissioners Office
(845) 564-0188
RR 52
Newburgh, NY
Be-Bright Lighting, Inc.
(716) 907-3763
P.O. Box 458
East Amherst, NY
Cenergy Communications
(716) 652-7400
728 Main St
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Center For Networking the
(718) 377-6599
2820 Avenue J
Brooklyn, NY
A C Consulting
(716) 945-2215
23 Fawn Ave
Salamanca, NY
Trem Management Company
(718) 336-4310
1639 E 13th St
Brooklyn, 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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