Flashing at Sills Jamestown NY

Sill flashing in Jamestown 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

Vineyard Group Llc
(716) 488-2412
100 E 5th St
Jamestown, NY
Small Business Development Center
(716) 665-5754
525 Falconer St
Jamestown, NY
Traffic Technologies Inc
(845) 876-1745
16 Cove Rd
Rhinebeck, NY
Hopkins Consulting
(646) 429-1299
36 W 20th St
New York, NY
N Y State of
(212) 410-7707
413 E 120th St
New York, NY
E K Ward and Associates of the Southern Tier
(716) 484-0590
509 N Main St
Jamestown, NY
Workforce Investment Board
(716) 661-9324
25 Harrison St
Jamestown, NY
Central Managmnt Co
(516) 822-8808
290 N Broadway
Hicksville, NY
Brown Randall J
(716) 679-9669
9369 Fredonia Stockton Rd
Fredonia, NY
Rba
(914) 762-2012
500 Executive Blvd Ste 104
Ossining, 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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