Flashing at Sills Massena NY

Sill flashing in Massena 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

P R C Management Corp
(718) 295-6418
2412 Crotona Ave
Bronx, NY
1986 Grand Ave Hdfc
(718) 731-0500
1986 Grand Ave
Bronx, NY
R S F Enterprises Inc
(914) 967-4503
1 W Purdy Ave
Rye, NY
Upstate Benefit Consulting
(315) 479-8917
620 Erie Blvd W
Syracuse, NY
World Class Int'l Ltd
(212) 557-7946
441 Lexington Ave
New York, NY
J P Tubbs Co
(315) 705-0137
41 Main St
Massena, NY
Grage & Assocs
(585) 387-0422
9 White Briar
Pittsford, NY
Itouris
(518) 523-1402
W Valley Rd
Lake Placid, NY
Goetz Paul L CPA
(518) 449-3166
66 State St
Albany, NY
Perseus Soros Management Llc
(212) 271-3004
888 7th Ave Fl 29
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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