Installing Weatherstripping On Metal Double-Hung Windows
- Procedure code:
- Hspg Prepared For Nps - Sero
- Doors and Windows
- Metal Windows
- Last Modified:
INSTALLING WEATHERSTRIPPING ON METAL DOUBLE-HUNG WINDOWS
A. This procedure includes guidance on installing various
types of weatherstripping on metal double-hung windows.
B. It is best to use the thinnest material available to fill
the space where air is entering. Weatherstripping that
is too thick can spring hinges and can create additional
C. To help seal a structure against the elements,
weatherstripping can be applied to window and door
openings. The type and manner of weatherstripping
installation is very important when applied to historic
structures. The Regional Historical Preservation Officer
(RHPO) should be consulted before weatherstripping type
is chosen or applied.
D. See 01100-07-S for general project guidelines to be
reviewed along with this procedure. These guidelines
cover the following sections:
1. Safety Precautions
2. Historic Structures Precautions
4. Quality Assurance
5. Delivery, Storage and Handling
6. Project/Site Conditions
7. Sequencing and Scheduling
8. General Protection (Surface and Surrounding)
These guidelines should be reviewed prior to performing
this procedure and should be followed, when applicable,
along with recommendations from the Regional Historic
Preservation Officer (RHPO).
A. Accurate Metal Weatherstrip Co. Inc. www.accurateweatherstrip.com/index.html
B. Pemko Manufacturing Co. Inc. www.pemko.com
A. Metal Integral Weatherstripping (see manufacturers in section 2.01 or approved equal).
1. Most effective and durable type of weatherstripping
2. Most difficult to install, requiring some degree of carpentry skill to accomplish.
Spring Metal Weather-stripping (see manufacturers in section 2.01 or approved equal).
1. Available in bronze, brass or stainless steel.
Also available in spring plastic.
2. Designed with an integral friction-fit mounting
3. Attached by nails to the side channels of the
4. No applied glue necessary.
5. Tight closure insured by thin metal.
6. Window must be painted first to prevent galvanic
7. Usually applied around entire perimeter of window;
On casements, all but hinge side.
Adhesive-Backed Plastic Spring or Plastic `V' stock or
Vinyl Strips is a plastic version of spring metal
weatherstripping. It is attached by adhesive. Channels
must be thoroughly cleaned before installation because
the adhesive will not stick to dirty surfaces. The
plastic does not last as long as metal.
1. Applied after painting.
2. in "V" configuration.
3. Usually glued to frame; Some have adhesive backing.
4. Increased thickness due to adhesive; therefore, not
Compressible Foam Tape:
NOTE: ADHESIVE-BACKED FOAM STRIP SHOULD NOT BE USED AT
1. Best for large windows where there is a slight
bending or distortion of the sash.
2. Adhesive or plain (to be applied with glue) back.
3. Useful for gaps up to 1/4" wide.
4. More frequent replacement required than for spring
metal or vinyl strips.
Caulking or Sealant Bead and Polyethylene Bond-breaker
Tubular Gasket Weatherstripping:
NOTE: TUBULAR GASKET WEATHERSTRIPPING IS AN EFFECTIVE
OPTION; BUT, IT IS UNSIGHTLY. THIS TYPE OF
WEATHERSTRIPPING SHOULD NOT BE USED.
A. Carpenter's tools needed to remove sash
B. Tin snips or radial arm saw
C. Table saw or router
D. Putty knife
A. Surface Preparation:
1. Using a heat gun and thin putty knife, break
existing paint film and remove sashes, see 08610-
03-R "Unsticking a Wood Window Sash" for guidance.
2. Strip paint from sash jambs, sill and parting bead.
3. Caulk and fill cracks that could trap moisture.
4. Replace sash cord if needed, see 08760-01-R
"Replacing a Sash Cord or Chain" for guidance.
3.02 ERECTION, INSTALLATION, APPLICATION
A. For Metal Integral Weatherstripping: (follow
1. Measure and cut metal for top and upper sides of
sash. The metal can be cut with tin snips or a
radial arm saw with metal cutting blade. Miter
2. With a table saw or router, cut slots in sashes to
3. Fit metal into upper jambs and head of window frame
leaving space at sash pulley location and reinstall
4. Install weatherstripping to the lower window frame,
installing it at the jambs before the sill. Slip
lower sash into position from above.
5. Check for binding in both sashes; reinstall stops.
B. For Spring Metal Weatherstripping: (follow
1. Nail strips to sash channels being careful not to
cover pulleys in upper channel.
2. Nail full width strip to underside of bottom sash.
3. Slightly nail strip to inside edge of upper sash.
C. For Caulking or Sealant Bead and Polyethylene Bond-
breaker Tape: (follow manufacturer's instructions)
NOTE: THIS PROCEDURE IS EFFECTIVE FOR ALL TYPE OF METAL
WINDOWS WITH VARYING DEGREES OF AIR INFILTRATION.
1. Clean window frame thoroughly using a solvent.
2. Allow to dry and prime.
3. Apply a bead of silicone caulk.
4. Apply bond breaker tape to operable sash covering
metal section where contact will occur.
5. Close window and allow sealant to set (2-7 days
depending on the temperature and humidity).
6. Open window and remove bond breaker tape; The bead
should have taken the shape of the gap.
If the window is never opened, it may be sealed shut with
acrylic latex caulk. If the window is seldom opened, a roll-
type temporary caulk may be used.
END OF SECTION