
Chaska, Minnesota
Reliable TPO Roofing in Chaska, MN
Stand on Walnut Street in Chaska and the flat roofs are the part you do not see. They sit behind brick parapets on buildings from 1860 to 1920. That is the whole story of this work here: what fails is almost never the field of the membrane, it is the place where the roof meets a masonry wall.
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Masonry is what makes these roofs tricky
On a brick building the roof is only half the job. The membrane runs up the parapet and terminates against masonry, and old Chaska brick does not forgive a careless anchor. We drill into mortar joints rather than face brick, set a proper termination bar, and cap it with counterflashing and coping metal that sheds water away from the wall instead of into it. Under the sheet we usually find several old layers over a plank deck, and the plank has to be sound before anything new goes down. If your building runs a kitchen or a fryer exhaust, ask us about PVC roofing, which holds up to grease better than TPO does on a restaurant roof.

TPO Roofing in Chaska
Details that decide an older Chaska roof
Termination into mortar, not brick
Anchors driven into the face of soft old brick crack it and let water in behind the flashing. We fasten into mortar joints, seal the top edge and keep the masonry intact.
Coping and counterflashing that sheds
A parapet cap that dumps water down the inside face will soak a wall and stain the brick below. New coping gets pitched to the roof side with sealed joints and hemmed edges.
A roof the sidewalk never sees
The Walnut Street Historic District covers about seventeen acres and has been on the National Register since January 1980. A membrane behind a parapet changes nothing about how the building reads from the street.
Ice held off the parapet edge
Narrow eaves and tall parapets on these blocks hold snow rather than shedding it. We keep drainage paths open and detail the edge so melt has somewhere to go before it refreezes.
A cooler top floor in July
Masonry stores heat all afternoon, and a dark old roof adds to it. A white membrane sends much of the sun back off the building, which the top floor notices first.
Old layers off a plank deck
Buildings from 1860 to 1920 often carry three or four roofs stacked up. Taking them off lets us see the boards, replace what is soft and start the new system on something solid.
How we work on Chaska buildings
We walk the walls first
Before quoting we look at the parapets, the coping and the mortar, because on these buildings the wall condition decides how the roof has to be terminated.
We photograph what we open
Old buildings hide surprises under the roof. When we pull layers off and find a soft board or a dead chimney, you get a picture and a call before we cover it up.
Downtown staging planned in advance
Narrow lots and shared walls near Walnut Street leave little room. We set the dumpster, the hoist and the work hours with you before the first day, not on it.
We warn the tenants upstairs
Some of these buildings have apartments or offices over the shop. Fastening a roof is loud, so we give notice, set the hours and keep the entrances clear.
Whole envelope, one contractor
We also do siding, windows and metal buildings, so tuck-in details where a roof meets a wall or a window head do not get handed off to somebody else.

What people near Chaska say
Fantastic guys to work with, did an excellent job of fixing our siding. You can tell it’s a high integrity company. Definitely recommend.
Carolyn MillerSiding repair The crew arrived early and spread tarps all around the house to capture every bit of debris. By 3:00 PM, my entire roof was completely finished.
Hazel JamesRoof replacement, Minneapolis, MN Orange Exteriors fixed a minor leak that involved replacing flashing and a few shingles blown off our roof. Timely, quality work. Great ideas to keep our roof going long term.
Jim ThomasStorm damage repair
Chaska flat roof questions
What people in Chaska ask us about this work. If yours is not covered, call and ask.
Will a new flat roof change how my building looks in the Walnut Street Historic District?
From the sidewalk, no. The membrane sits behind the parapet and is out of sight. What can be seen is coping and edge metal, so we match profiles and colors carefully. The district has been on the National Register since 1980, so check with the city before changing anything visible.
Can TPO go over the old plank deck on a downtown Chaska building?
Usually. The plank has to be sound and reasonably tight, and it needs a cover board over the insulation so the membrane is not riding on gaps between boards. Where boards are soft, cupped or burned by an old chimney, we replace them. That work shows up in the estimate as square footage, not as a surprise later.
Do all the old roof layers have to come off?
Often yes, and there are two reasons. Code limits how many layers a building can carry, and old framing in these blocks was not sized for stacked roofs. More importantly, wet insulation left in place keeps rotting the deck under a brand new membrane. The core cut tells us which situation you have.
Ask about your Chaska building's roof
Send us the address and we will get on the roof, look at the parapets and give you a written scope. Estimates are free, with no obligation to book the work.
Get Your Free Exterior Estimate
Tell us what is going on with your roof, siding, windows, or gutters. We will take a look and give you a straight answer, including when the answer is that you can wait.
- Phone(612) 600-8529
- Emailadmin@orange-exteriors.com
- Office6600 City West Pkwy Suite 375, Eden Prairie, MN 55344
- HoursOpen 24 hours, Sunday to Saturday
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