Flashing at Sills New City NY

Sill flashing in New City 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

Lighting New York
845-786-LITE (5483)
4 Carol Street
West Haverstraw, NY
Renaissance Electric Corp
(718) 515-2853
4039 Laconia Ave
Bronx, NY
Peregrine Associates
(845) 634-1051
254 S Main St
New City, NY
Drake Beam Morin Inc
(585) 292-0190
135 Corporate Woods
Rochester, NY
Appgen Business Software
(631) 273-0255
1300 Veterans Hwy
Hauppauge, NY
Weiss & Biheller
(212) 979-6990
440 Nepperhan Avenue
Yonkers, NY
Enhanced Home
914-560-4100
163 North Main Street
Port Chester, NY
Koenig Managmnt Ltd
(845) 639-1072
120 N Main St
New City, NY
D J McLachlin Management Llc
(845) 634-4443
15 Lombardi Dr
New City, NY
Management Vision Inc
(212) 987-4300
177 E 87th St
New York, 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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