New Canaan has roughly 80 to 100 modern houses from the 1940s into the 1960s, many with flat roofs over full-height glass. A flat roof over heated space is membrane and drainage work, not a shingle roof with the pitch taken out. Drainage and the roof-to-glass junction decide how well it lasts.
Key takeaways
- The Harvard Five architects settled in New Canaan in the 1940s, and modern houses followed into the 1960s.
- Sources differ on the count, with about 80 and about 100 both given, but both agree about 20 of the houses have been demolished.
- Flat roofs, full-height glass and horizontal planes make drainage and the roof-to-glass junction the core of the job.
- The Glass House has been open to visitors since April 2007.
- A flat or very low-slope roof over heated space is membrane-and-drainage work, not shingle work.
- Whether a particular house is listed is a question for the authority that keeps the record, not for a roofer's guess.
Who built New Canaan's modern houses?
The Harvard Five architects, John M. Johansen, Marcel Breuer, Landis Gores, Philip Johnson and Eliot Noyes, settled in New Canaan in the 1940s. Roughly 80 to 100 modern houses followed into the 1960s.
The Harvard Five settled in New Canaan in the 1940s: John M. Johansen, Marcel Breuer, Landis Gores, Philip Johnson and Eliot Noyes. The stock that followed was built mainly from the late 1940s into the 1960s. Sources differ on how many modern houses were built in that period, with some counting about 80 and others about 100, so roughly 80 to 100 is the honest way to put it. Any single number would claim more precision than the record supports.
About 20 of the houses have been demolished, and both counts agree on that figure. The houses that remain are the most distinctive roofing stock in this part of Fairfield County, and the work on them is different from the shingle roofs of downtown Stamford or the slate and tile on the older estates. A homeowner with one of these houses is working with a flat or low-slope roof that was designed as part of the architecture, which changes how any repair or replacement has to be approached from the first conversation.
What makes a modernist roof different?
Flat roofs, full-height glass and horizontal planes put drainage, membrane detailing and the junction between roof and glass at the center of the job. A shingle roof depends on slope to shed water, and these roofs depend on the membrane and the drains.
The form is the issue. A shingle roof sheds water because it is sloped and the shingles overlap down the pitch, so gravity does much of the work. A flat or very low-slope roof has no slope to do that work, so water has to be moved to drains and gutters by the membrane and the detailing. Water that sits on a flat roof is the main thing the detailing has to prevent, because standing water is what tests a membrane and its seams over time. The drainage is therefore not a finishing detail on these roofs. It is the design, and it has to work in every storm, not only the ordinary ones.
The glass adds a second problem. Full-height glass and skylights meet the roof along lines where movement, water and heat all come together, and the flashing at those lines does more of the work than the field of the roof does. A flat roof over heated, glazed space is membrane-and-drainage work, not a shingle roof with the pitch taken out. That difference is the reason a flat roof repair call starts at the joints, and the reason a skylight leak repair is treated as a roof job rather than a window job.
Why do flat roofs hold snow in this climate?
A flat roof has no slope to shed snow, so snow stays until it melts or is cleared. Over heated space, the bottom of the snow can melt and the meltwater can refreeze at a cold edge, so the roof needs the same attention to air sealing as a pitched one.
A flat roof does not shed snow the way a pitched roof does. Snow sits on the membrane until it melts or is cleared, and on a roof that is heated underneath, the bottom of the snow can melt against the surface even when the air is cold. The meltwater then runs toward the edge, where it can refreeze and back up behind a parapet or under the flashing. That is the same freeze-thaw sequence that builds an ice dam on a pitched roof, and it works on a flat roof in its own way, because the water has less slope to escape along.
The sourced picture for this coast is a snow-then-thaw cycle in deep winter, and the shore gets less snow than inland towns do. A flat roof is not protected just because the snowfall is lighter, since the trouble comes from the sequence of melting and refreezing rather than from the total depth. Ask a technician to check how the roof is insulated, how the edge is detailed and whether the drains are clear before the first snow. Do not rely on a regional snowfall figure to judge a single roof, because the roof itself is what decides how it handles the melt.
Which New Canaan houses are on the register?
The Glass House has been open to visitors since April 2007. Several other New Canaan modern houses are on the National Register, and the register is the place to check which ones are listed.
The Glass House is the best-known of these houses, and it has been open to visitors since April 2007. Its roof is a flat roof over a glazed room, which is exactly the form this guide describes.
Several other New Canaan modern houses are on the National Register as well. Nobody should be told by a contractor whether their own house is or is not a listed one, because the answer is a matter of record, not of opinion. If the question matters for your roof, ask the town or the state historic authority that keeps the record, and plan any work around what they tell you. The roof is only one part of a listed house, and the authority can explain which changes need review before work begins.
Who needs a Connecticut registration for this work?
New Canaan is in Connecticut, so a roofer working on a home here registers as a Home Improvement Contractor with the Connecticut Department of Consumer Protection. Connecticut issues no roofing license, and registration status can be checked on the state's lookup site.
Connecticut issues no roofing license. Contractors doing roofing work on homes register as Home Improvement Contractors with the Connecticut Department of Consumer Protection, which handles complaints about registered contractors. The registration is a registration, not a trade license, and it does not involve an exam. A roofer on a flat roof in New Canaan has to be registered in the same way as a roofer on a shingle house in Darien, and the same state rules apply to both.
All home improvement projects must have a written contract. The contract has to carry the contractor's registration number and set out the dates for signing, starting work, finishing it and the date by which the homeowner may cancel. A contract missing the required provisions is not valid or enforceable against the homeowner. Registration status can be checked by consumers at elicense.ct.gov, which is a state system, and that is the place to confirm a contractor's status before any agreement is signed. The registered contractor guide explains the same rules in more detail.
What does a flat roof repair usually involve?
A repair starts with finding where water is getting under the membrane, which is often at a seam, a drain or a flashing rather than in the middle of the field. The technician then checks the deck and the insulation before deciding between repair and replacement.
Flat roofs tend to leak at joints more than in the open field: where the membrane meets a wall, around a drain or scupper, at the curb of a skylight and along the edge of the glass. A technician looks for wet insulation first, because it shows where the water has traveled and how far it spread. Once the water path is clear, the repair is often a matter of renewing the detail at that joint, rather than replacing the whole membrane. The work is careful and specific, and it depends on what is actually under the surface.
Replacement becomes the question when the insulation is soaked across much of the roof, when the membrane has become brittle, or when the drainage cannot be made to work with the existing layout. That decision belongs to a technician who has opened the roof, not to a guess made from the street. The cost depends on the roof itself, its size, its access and what is found underneath, and the figure is set after a site visit rather than before it. A good first visit leaves you with a clear account of the water path and the options.
What can a homeowner check from the ground and from inside?
From inside, look for stains on ceilings near glass, skylights and outside walls. From the ground, look for standing water after rain, drains blocked with leaves and flashing that has lifted at a wall. Do not walk on the roof to look.
Ponding water is the sign to pay attention to. If water stands on the roof after the rain has stopped, the drainage is not doing its job, and the membrane is working harder than it was designed to. Look at the drains and scuppers after a storm, and clear leaves and debris from them when it is safe to reach them from a stable position. Gutters on a low-slope roof need the same attention as any others, because water that cannot leave the roof quickly will find the joints.
From inside, watch for stains that appear along the glass line, around a skylight curb or on the wall under a parapet edge. A stain that grows after rain is a reason to call, and the line is answered 24/7. Do not climb onto a wet membrane, which can be slippery and can be damaged by a foot, and leave the roof surface itself to a technician. Photographs taken at the time of the stain give the technician a much better starting point than a description made the next week.
Frequently asked questions
Are all modern houses in New Canaan flat-roofed?
The flat roof is what the modern stock is best known for, along with full-height glass and horizontal planes. Each roof still needs to be checked on its own, because the form of the house does not tell you the condition of the membrane or the drains. Ask the owner or a technician what the roof actually is before you assume anything about it.
Is my flat roof a listed one?
A contractor should not tell you whether a house is listed. The National Register and the local and state authorities keep the records that answer that question. Ask them directly before you plan work that could change the roof or the glass. A technician can explain what the roof needs once the status is known.
Can a flat roof over a heated room be built like a shingle roof?
A flat roof over heated space needs insulation and a membrane designed for that build-up, along with drainage that works at a low slope. A shingle roof depends on a pitch and a ventilated space that a flat roof does not have. The detail at the glass and at the wall edges decides much of how the roof performs. Ask the technician to explain the build-up before any work starts.
Does a flat roof hold snow?
A flat roof does not shed snow the way a pitched roof does, so snow can sit on it until it melts or is cleared. The shore gets less snow than inland New England, but a flat roof still needs its drains and edges checked before winter. Clear the drains before the first snow of the season. A technician can check how the edge and the drains handle snowmelt on a particular roof.
Who should I call first about a leak?
Start by calling (833) 751-2102, which is answered 24/7. Tell the person where the stain is and whether it grows after rain. A technician can check the joints, the drains and the insulation, and then explain the repair in plain terms. Keep your photographs of the stain ready for that conversation.
Sources
This guide is general information for Fairfield County homeowners, not a substitute for an on-site inspection. Prices are estimates. See our disclaimer.