Flashing Factors Kew Gardens NY

Rowlock brick sills contain many joints and are particularly susceptible to water penetration. For this reason, I do not recommend their use in freeze-thaw environments in Kew Gardens.

Local Companies

MUHAM R
(212) 234-2644
5 Palisades Dr Albany, NY
NY, NY
Stephen Wang Associates
(212) 829-9494
135 E. 55th Street
New York, NY
trinchese iron works and construction inc.
(718) 848-1954
3375 royal ave
oceanside, NY
Gotham Builders
800-444-4923
203- 20 Rocky Hill Road
Bayside, NY
Van Go General Contracting
(201) 387-9013
326 So. Washington Ave
Bergenfield, NJ
Hudson Fasteners, Inc.
516-897-8900
P.O. Box 150
Long Beach, NY
ContiGroup
(212) 207-5100
277 Park Avenue
New York, NY
KNK Construction Inc
212 398-1014
155 Avenue of the Americas 3rd Fl
New York, NY
Ideal Construction
(201) 792-7464
188 Manhattan Ave
Jersey City, NJ
Uvs Construction
(718) 554-0426
Beach 74Th St
Arverne, NY
Data Provided by:
  

Provided By:

Source: MASONRY CONSTRUCTION MAGAZINE
Publication date: October 1, 2005

Should flashing be used beneath rowlock brick window sills? If through-wall flashing is installed beneath these rowlocks, how are the sills anchored? If the anchors penetrate the flashing, does this lead to deterioration of the masonry below in freeze-thaw environments?

Rowlock brick sills contain many joints and are particularly susceptible to water penetration. For this reason, I do not recommend their use in freeze-thaw environments.

When they are used in freeze-thaw environments, however, the flashing beneath them is critical to prevent water from saturating the top of the masonry wall below. Snow and ice collects on the rowlock sills. When they melt, water can penetrate the sills and refreeze, resulting in deterioration. This scenario is a particular problem with the anchorage of these sills because they break apart.

When rowlock sills are used, they can be anchored using galvanized corrugated wall ties in the head joint between every fourth to sixth brick unit. When possible, I prefer that these anchors be attached to the backup wall on the vertical face, behind the sill.

It also is possible to extend flat strap anchors through the flashing. However, any penetrations through the flashing must be carefully sealed.

Click here to read full article from Masonry Construction

Related Local Event
Long Island Building & Facility Maintenance Show
Dates: 5/5/09 - 5/8/20
Location: David S. Mack Sports & Exhibition Complex - Hofstra University
Hempstead, NY
View Details