Do you have a metal porch roof or asphalt?
Is your porch roof the original design?
You may have a very authentic vintage home but there is a good chance that your porch roof has been not only replaced but changed over the years.
What looks original may not be. Some porch roofs were not meant to be seen.
Many metal porch roofs were made of tin, a tern metal that was painted usually red or green and some were even made of copper.
Porch roofs were usually red or green. It is possible that the slope of this porch roof has been changed from a flatter roof. (house built 1915)
A tin porch roof is barely visible up close to the house. (house built 1910) (Monkeyface is on the porch)
Tin porch roof with Acrymax coating in a copper patina color.
Tin roofs had a very shallow pitch. The pitch of this roof is 2:12 or 9.46 degrees. The tin roof slopes downward to the front where there is a sort of gully. This gully is angled to the corners of the roof where there is a drain.
Tin roof is sloped to the drain which goes through the soffit connecting to the downspout.
Downspout goes through the soffit.
The drain is merely an opening in the roof down through the soffit where a downspout carries the water away.
Here is a close-up. A tin metal roof is made of of soldered pieces of metal.
Why have people replaced their tin roofs? The design is NOT a problem. If the drain becomes clogged or rotted, the water can leak into the soffit rotting out the wood. This problem is more apt to occur with a modern roof and gutters that can easily get clogged. A gutter holds leaves while the gully on a tin roof allows leaves to blow off. A tin roof requires minimal maintenance and can last years. Mine is from 1910. As with anything, neglect results in destruction.
Aesthetically a tin roof like this is the way to go for the gutter system is that of a Built-in gutter . Once this roof is replaced you will then need to install gutters. The gutters, either K-style or half-round will cover up the nice looking bed mold trim on the fascia board.
Metal Porch Roof Repair – The Wrong Way
Sometimes the metal roof was repaired by applying roof tar or an aluminum asphalt silver paint. Asphalt shingles couldn’t (shouldn’t) be applied to the porch roof because there was not enough of a pitch for the water to run down. A better fix was to alter the design of the house by increasing the pitch of the roof. The new porch roof would be a real lot higher beginning usually right under the second floor window sill which is too high. This makes the second floor appear shorter when viewed from the street. A look that the original architect did not want. Be sure to read my article on porch flashing for this leads to another issue.
My Tin Porch Roof
When I purchased my 1910 home, the porch roof was recently painted with a new coat of silver aluminum asphalt paint. It looked ok if you like shiny sliver but by the following year it was leaking through the bead board ceiling onto the porch floor. I contacted a few roofers and the only option was to go with black rolled roofing and I remember they said it would have a white lip around the edges. That meant a definite no for me so I did some research.
Meanwhile this silver painted roof was quickly deteriorating. I actually had holes in the porch roof the size of my fist. I found a company that manufactured an elastomeric coating called Acrymax that I can paint onto my roof that would seal it, protect it, and allow it to expand and contract at a wide range. There is also a high strength polyester reinforcement which gets applied over the large holes. The most difficult decision was choosing a color. I finally decided on a copper patina color that I thought would go well with my house colors – although the roof is only visible from down the street.
The result was unbelievable. I still have my 1910 tin roof and it is now in perfect condition. Don’t listen to your roofer or contractor and alter the design of your house to something it was not meant to be. For a fraction of the price (and I mean a fraction) you can save a super deteriorated roof that you would not think could possibly be saved, let alone last for many years. Here is a link to the repair I used and here is another.
Metal Porch Roof’s Today
If the pitch of your porch roof is low, the roof should be metal. You DO want the porch roof to look different from your main roof. It can also be a different color. A porch roof with a pitch that appears more steep can be an asphalt roof and then should match the main roof in style and color. I am not stating roof pitch slopes for I think it is best to do make a judgment call on this.
There are two basic types of metal roofing.
Standing Seam Roof:
- Standing seam roofs are sheets of metal that attach to each other with interlocking ridges. Standing seam roofs were also used as the main roof for homes during the 1800’s.
Flat Soldiered Seam Roofing:
- Flat soldiered seam roofs are metal roofs without seams. These roofs were mostly used for porch roofing and tower roofs. This is the type of roof I recommend for most porch roofs.
Use Caution When Choosing a Roof
Round porch is not original. Roof pitch was increased. Seems appear too strong and bulky.
The above house was a Foursquare home that was in bad condition. Someone purchased the house and changed the appearance making it into a fancy contemporary Foursquare. Not like the house was designed to look. A Victorian round porch was added. A Foursquare would never have a porch like that. The roof pitch was increased cramping the windows above it and a fancy standing seam roof was installed on the porch. I do not like it. The seams are way too pronounced and distracts the viewer – especially on the turret roof. Are there other manufacturers that offer smaller seams? Yes there are. Just pay attention to the standing seam roofs you see in your travels. Some look a lot better than others.
Lately I have seen a lot or standing seam metal porch roofs. Black metal seems to be popular although you can probably fry an egg on it during the summer. I love standing seam roofs but I do not like them on a porch. They seem too bulky for a small area and the details seem exaggerated. Porch roofs like this seem to attract your attention away from the rest of the house.
This is an awful roof. It’s so clunky and really shows a lack of craftsmanship on design and installation.
It seems that the standing seam roof salesperson also convinces the homeowner to add matching gutters. Never match the gutters to the roof. This is a major mistake! See my article on historic gutters to better understand gutter color and how it effects the appearance of a house.
This is an old standing seam roof that is well designed. A flat metal roof is also appropriate for a bay.
Above is a very tastefully designed Standing-seam roof.
My friend has a flat metal porch roof on his 1838 home. Notice the built in gutter system.
Although the roof above is not painted it does have a more appealing appearance for its simplicity allows the roof to blend in letting the other more important features of the porch and house stand out more.
There are a quite few options when choosing a standing seam roof. The information I have here is to make you aware of porch roof aesthetics. There is a lot to know such as the type of metal and if you have the option to paint the roof if you later want a change.
Roofing Overlap
The trim on a house is visually very important for it outlines the house and provides a border surrounding the body color creating a neat appearance. The trim must be proportional to the architecture of the house. If the trim on the eaves of your house is too thin then it can appear that the trim is not visually strong enough to support the heavy roof. All this registers with your inner senses and can create a negative feeling.
Not a porch roof but an example how a metal roof can overlap the fascia totally destroying the outline of the house by covering the fascia board.
Today there is a problem with roof flashing that covers the trim. This is explained in the blog post – Roof Flashing – What You Need to Know . The design of some metal roofing also creates a similar problem. The metal roof that once overlapped the fascia board beneath the roof only about 1/2 inch now can completely cover the fascia board totally concealing the trim. This is a MAJOR PROBLEM that must be discussed with the roofers at the very beginning. When roof shopping, this is something you need to be aware of and prevent.
Tin porch roof versus ugly asphalt.
Before and after. Instead of repairing the tin, a new asphalt roof was installed very badly. What this homeowner did was an atrocity. See the tin roof. Instead of repairing it, new asphalt roofing was installed on top of the tin. On top of all that the roof overhangs so low that it completely hides the fascia. This is one of the worst roofing jobs I have ever seen. Don’t do this to your house or your neighborhood!
A New Flat Porch Roof Warning
Notice that on the newly repaired flat roof a drip edge flashing was added that looks like crap.
A porch roof has a shallow pitch compared to a main roof so if you contact a roofer to install a flat roof take warning. I was told that this hideous looking aluminum drip edge is required. How sad to cover up that beautiful trim.
A Metal Roof for Your Main House Roof?
If your house is pre-Victorian then you can use a metal for the main roof. Do NOT put a metal roof on a Victorian or Craftsman etc. If your house was built before 1870 a metal roof would be appropriate. A Colonial Revival from the 1920’s would look appealing with a metal roof but would not be historically correct.
Recommended Reading on Metal Roofs
YOU MUST READ THIS PAGE Click here to read.
Scroll to page 40 Click here to read.
Make Mine Metal – Steps to Installing Standing Seam Roofs – Old House Journal 2002
Scroll to page 68 Click here to read.
Great information!
Did you have to strip off the aluminium asphalt paint down to bare metal, or was the Acrymax able to adhere to it?
Well I was supposed to but didn’t at all and had no problem. Glad I didn’t do all that extra work.
Where do you buy the coating? (and does it come in red? Google gives no information. I have a small hole in my otherwise intact BIG roof that I patch occasionally with butyl rubber, but every couple of years, the freeze/thaw cycle in winter causes it to leak. Need to patch less than 0. 5 square foot
P.S. Already a subscriber
Hi Diane – I just tested the link I have in the article and it works. Please try again.
Can’t even see any roofers capable of doing a flat seam tin roof in the Boston area. Seems we’d be a very expensive training project. Your site even has very little mention, is it a lost art?
Most people you hire to do any work want to do the job on automatic pilot. The do the same job the same way for every house no matter what. They do not want to take the time to think and do anything differently than they usually do. There are still people out there that take pride in their work and love a challenge and get excited to do a “special” project. Keep searching for the work does not take a rocket scientist. Just like a slate roofer – not many around but if they specialize it in they are really good. Keep looking and try my listing of contractors on my resources page. Also ask the roofers that can not do what you want if they know of someone that can.
Hello! Regarding this comment:
“A Metal Roof for Your Main House Roof?
If your house is pre-Victorian then you can use a metal for the main roof. Do NOT put a metal roof on a Victorian or Craftsman etc. If your house was built before 1870 a metal roof would be appropriate. A Colonial Revival from the 1920’s would look appealing with a metal roof but would not be historically correct.”
Do you have an article on main roofing choices?
We’re in the process of buying our first home, an old “Southcott Style” house (~1910s/20s) in St. John’s, NL, Canada. On the front (in dire need of repair) we have a bellcast mansard roof with 2 dormers, and a protruding bay window with a porch-like roof – all asphalt shingles. The top roof is torched on, and the back mansard has a cedar shake, neither of which need replacing yet. We were considering metal roofing for environmental & aesthetic reasons, but now (after reading your comment) I’m thinking that, while there are metal mansards in town, I’m now guessing they may be on slightly older buildings… Most residential homes seem to have asphalt shingles, but they do not seem to hold up very well in our weather and we’re concerned for longevity. Do you have any advice?
I hope to find time to do a roofing article soon. Mansard roofs were either painted wood shingle or slate. They sometimes had a design. I have not seen a metal mansard. If not an authentic replacement I would recommend asphalt shingle in the decorative round shingles. Red or green to represent a painted shingle or a slate color (Not pure gray) is good. Keep in mind cool versus warm. Gray roofs tend to have a blue cast which will not work with most period paint colors.
my home was built in 1995. I choose a metal roof 10 years ago. because of the longevity and fashion trend. my roof has began to rust from the weather and looks bad. what can i do? Do you feel that i made a bad choice?
Wow I am surprised about that. I would contact the manufacturer. Also check out the site http://preservationproducts.com/
Great article. I have an 1860 Italianate, vernacular with a huge original slate hip roof. There are 2 additions that are flatter roofs that need to be replaced. One is awful asphalt shingles from possibly the 1970’s and the other is tin, but done poorly. Do you recommend the 2 roofs be the same material? My roofer is recommending metal but I don’t want a seamed “modern farmhouse” look. The 2nd addition’s roof is prominent from the ground and both roofs will be seen from upstairs bedroom windows.
All porch roofs should match each other. Since your main roof is slate, the other newer roofs do not have to match and can be a different type to show the evolution of the house. Metal roofs were used during the mid 1800’s but were nicely done compared to what they install today. I just updated this page showing a bad metal roof that you did not see. Check it out. https://www.oldhouseguy.com/roof-flashing/ The old metal roofs are so popular now they appear modern. You can install a new asphalt roof that would work nicely with your slate roof.
Ken,
My name is Rob and i am a roofer that came across this same type of tin roof. I talked the homeowner into keeping the tin roof. We will be using the products you recommend. Acrymax AF-130XT High Strength Elastomeric Roof Coating. We also will give her the color options.
Thanks for great information on old roofs.
Rob Alexander
This article was very informative and thank you for putting this together. I would greatly appreciate your thoughts and input on our current project. We own a 1888 Queen Anne victorian in Tacoma WA, and are currently in the middle of a major renovation. We have added an extension to the back of the house for a larger kitchen and adding a much larger covered back porch. We have done our best to keep the appearance of the extended kitchen to appear as if it were originally built this way. Our current problem is the size of the back porch with the extension; to meet code the pitch of the roof is too great for shingles and interferes with the back windows of the house. The option of a metal roof was brought up by our contractor in order to drop the pitch and have the roof from the kitchen extension flush with the remaining roof over the back porch. The rest of the house has standard asphalt shingle, including the covered wrap around front porch. The rest of the roof might need replacing in the future but would like to wait on this. what type of metal roof would you suggest for this back porch roof and do you think would be OK mixing and matching this with the rest of the house shingle roof? thanks
Hi – sounds fine to have a front porch roof and rear roof different as long as you don’t see both at the same time. I am not a fan of standing seam and for your purpose I recommend a flat tin roof. This roof can be a different color from the main roof. Red is a good color. Also be aware of how flashing can mess it up.
Good luck!!