Flashing at Sills Port Jefferson Station NY

Sill flashing in Port Jefferson Station 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

Purvis Systems Inc
(631) 642-3313
5225 Nesconset Hwy
Port Jefferson Station, NY
Adams Consulting Llc
(631) 653-9088
12 Stone Ln
Quogue, NY
R D Management
(845) 782-0720
215 Larkin Dr
Monroe, NY
Our Little Angels
(718) 347-7377
24655 87th Ave
Bellerose, NY
Rosehill Housing Management Corp
(718) 584-0194
2828 Decatur Ave
Bronx, NY
M R Joseph & Associates Inc
(631) 928-5704
515 Terryville Rd
Port Jefferson Station, NY
Rushford Lake Recreation District Ofc
(585) 437-2017
8999 Main
Rushford, NY
Stanwith Consulting
(212) 759-5788
14 E 60th St
New York, NY
Futurework Institute
(718) 832-8625
595 6th St
Brooklyn, NY
P R C Managmnt Corp
(718) 466-5813
80 Featherbed Ln
Bronx, 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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