Flashing Factors Frederick MD

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 Frederick.

J E S Construction Inc
(301) 790-0446
6830-B Putman Rd
Thurmont, MD

Data Provided by:
Creede Bath & Home
(301) 748-6868
5010B Green Valley Rd
Monrovia, MD
 
Archer Contractors
(301) 983-1111
PO Box 111
Damascus, MD
Services
Drainage

Cedarbrook Deck & Patio Inc
(410) 775-1444
10232 Fountain School Rd
Union Bridge, MD
 
A Cut Above Carpentry
(301) 824-7151
101 Irene Way
Smithsburg, MD
Services
Remodeling, Home improvement, Home repair, Hardwood and laminate flooring installation, carpentry, and much more
Awards
EPA Leadsafe Certified Firm, JD Power and Assoc.

BT Martin Contractors
(240) 529-5131
7130 Rock Creek Dr
Frederick, MD
 
Cordell Custom Homes and Remodeling
301-898-3386 or 301-606-1446
9455 Longs Mill Road
Rocky Ridge, MD
 
RPD CORP t/a:
(301) 983-1111
PO Box111
Damascus, MD
Services
Drainage Correction, Stormwater Control,, Waterproofing, Masonry, Grading-Excavation, Structural Repairs, Foundation Repairs/Replacement, Basement Waterproofing, s

O'Dell Concrete
(717) 965-0901
12336 Coppermine Road
Union Bridge, MD
 
ABC Sales Inc.
(301) 447-6222
882 W. Main Street
Emmisburg, MD
Services
Out Door Landscape Supplies
Awards
MBE/DBE/SBE

Data Provided by:

Flashing Factors

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

Local Events

Archiving 2009
Dates: 5/5/2009 – 5/8/2020
Location:
Crystal City Hilton Arlington
View Details