University of Vermont Historic Preservation Program

HP 307 Architecural Conservation II

Prof. Thomas Visser

Window Surveys

Documentation

Photographs
elevations
details
Drawings
elevations
types
details

Description

Window types & style
double hung; (9/6)
casement: (2W/6H)
fixed: (3W/2H)
 
Frame
inside dimensions
outside dimensions
dimensions and profiles of sills, stools, casings, mullions
 
Sash
dimensions (width, height, thickness)
profiles (muntins, stiles, rails)
wood species
 
Panes
glass dimensions
glass types
 
Hardware and counter-balance system
 
Age/ group

For large surveys, establish code system, spreadsheet chart, drawings

For each opening, identify by:
Elevation
Floor
Location
Purpose (window, door, vent, other)

Sample spreadsheet

 Features

 Conditions

 Treatment recommendations

 

sash
bottom rail
top rail
stiles
muntins
cames
supports & wires
glass
cracks
holes
broken
missing
bulges
soil & corrosion
glazing compound/ putty
points
paint/ finish
previous repairs
balance system
sash cords
weights
pulleys
pins
springs
locks & latches
frame
exterior casing & brick mold
sills (drainage)
headers
interior casing
parting beads & stops
stool
weather-stripping
storm windows
shutters
stiles
rails
slats
hinges
latches
dogs
   

Condition Classifications

A. Good condition

B. Fair condition

C. Poor condition

D. Missing

Treatment Classifications

1. no intervention

2. clean, scrape & repaint

3. minor repairs (re-glaze & re-putty)

4. major repairs - replace wood

5. reproduce/ replace

Numbering Systems and Codes

Simple method

N/2/10/A/2

elevation/story/#/condition/ treatments

 

Common Conservation Strategies

Sash- repair or replace decayed or broken rails, muntins, stiles as required

- duplicate molding profiles, dimensions, species, joinery

Glass - replace broken & missing panes (maybe replace cracked glass)

Putty - replace missing and deteriorated putty (if more than 1/3 poor, consider replacing all)

Paint - refinish deteriorated coatings to protect wood & putty, slightly lap paint onto glass to obtain seal

Balance system - replace broken or frayed sash cord

Functionality - remove excess paint from sash sides, frames, parting beads

- plane only if necessary to relieve structural changes

- coat bare wood with wax or clear sealant

- adjust locks & latches & counter-balance systems

- open weep holes at outside sill

Sills- refinish to keep out moisture

- heavy checking or decay may require consolidation and filling prior to painting, in extreme cases sill may require replacement

Interior sash

weather strip to insure tight seal to inside, heated air

Storm windows

inspect & repair to improve functionality

exterior - (little infiltration, positive drainage)

interior - tight air seal ( allow outside sash to breathe)

Replacements

only if missing or beyond repair

match dimensions, design, molding profiles