Reuben's Home Inspection Blog

How To Remove Ice Dams

February 12th, 2013 | 18 comments

With the recent snow storm we received in Minnesota and the crazy snow storm that dumped several feet of snow on the east coast, there will be plenty of people dealing with leaking roofs from ice dams.  I have already blogged about how to prevent ice dams from happening, but I get far more inquiries about how to remove ice dams.   There are plenty of ‘hack’ methods of removing ice dams, so I decided to discuss them.  The methods I’m going to discuss involve an axe, ice pick, pantyhose, salt, heat cables, a pressure washer, and even a blowtorch… just for fun.

Let me repeat – these are all hack methods.  I don’t advise any of these methods, but when people have water leaking in to their home, these DIY methods are what people turn to.  Hopefully I can talk people out of doing most of these.  The most effective and safe way to remove an ice dam is to hire a professional ice dam removal company that will use steam.

Axe

The most obvious way to get rid of ice dams is to take a blunt instrument and hack away at the ice dams.  I tried an axe.

Axe

Pros: Fast results.  I hacked through several feet of six-inch thick ice dams in a matter of minutes.

Cons: Unsafe, cumbersome, and you’ll wreak your roof.   I had to set up a ladder on the icy ground and swing an axe while standing on a ladder.  The ice also really flew in my face – I should have been wearing goggles.  I was only able to remove the ice down to the gutter, and only able to get close to the surface of the roof without risking damage to the shingles.  I’ve inspected dozens of roofs where someone got crazy with an axe at the eaves.  It’s a great way to ruin your roof.

Verdict: This is a high risk, yet fast and effective way of getting rid of a lot of ice, but leaves the job incomplete.  You’ll probably damage your roof doing this, and you might hurt yourself too.

Ice Pick

This sounds like a natural choice, doesn’t it?  I actually used my awl, but close enough.  I gave it my all.  <insert crickets chirping>

Reuben's Awl

Pros: Very fast results, very little effort.  It’s as though this tool was made for picking at ice.  Oh, wait…  Still, I was genuinely surprised at how fast and accurate this method was.

Cons: Unsafe.  Again, I was jabbing at ice dams while standing on a ladder, which was sitting on the icy ground.  I also had to be very careful to not damage the roof.

Verdict:  This worked quite well… but again, you’ll probably poke a bunch of holes in your roof doing this.

Roof Tablets

Yes, this is a product designed specifically for preventing damage from ice dams.  Contrary to the name on the container, the product doesn’t actually melt your roof (whew).  The instructions say to toss the tablets on to your roof and they’ll melt through the ice dams, allowing for “water to drain safely”.

Roof Melt Tablet Container

Roof Melt Tablet Instructions

Roof Melt Tablets

I tried tossing the tablets on the roof like the instructions said to do, but it didn’t work out very well.  I consider my tablet tossing skills to be well above average, but I still couldn’t get the tablets to end up in a good location – they all just slid together in one place.  If I didn’t get a ladder out to take pictures, I never would have known that the tablets didn’t end up in a good spot.

Roof Melt Tablets Tossed

Just to give the roof melt tablets the best possible chance for success, I hand-placed them on the ice dam and I used about four times as much as the directions called for.  The instructions said to put them higher up on the roof, but I wanted to make some holes in this ice dam.

Roof Melt Tablets Placed Day 1

By day two, I had some pretty dramatic results – the tablets had melted all the way through the ice dam.  By the way, for anyone in a southern climate that might be reading this blog, that white stuff on the ice is snow, from a very light snowfall the night before.

Roof Melt Tablets Day 2

By the third day, not much change.  There were definite holes in the ice dam, and some channels had formed for water to drain through, but the majority of the ice was still there.

Roof Melt Tablets Day 3 #2 Roof Melt Tablets Day 3 #1

Pros: If you had perfect aim and tablets didn’t move after you tossed them on to the roof, this would be very safe.  Some channels were created for water to drain through, which might be enough to prevent leakage at your roof.

Cons: The tablets don’t stay where they land, which negates the whole safety thing.  I still had to set up a ladder on the icy ground and move the tablets around myself.  This method was also pretty ineffective – it created a bunch of holes in the ice dam, but so what?  Most of the ice dam was still there in the end.

Verdict: This might be a nice way to get down to the roof surface, and it might prevent leakage from ice dams if enough channels are created for water to drain through, but you’re still left with a huge ice dam.

Salt Filled Pantyhose 

Take off your pantyhose, fill ‘em up with calcium chloride or something similar, and toss ‘em on your roof perpendicular to the ice dams.  The idea is that the salt will leak through the pantyhose and create channels for the water to drain through, preventing water from leaking in to your house.

I filled one pantyhose leg with “Ice Melt”, which contained a blend of calcium chloride and rock salt.  I filled another with an ice melting salt that didn’t have the contents labeled – I suspect it was just rock salt.  I also poured the Ice Melt in a perpendicular line along the ice dam, using far less salt than I used in either of the pantyhose.  I did this just to compare the results.

10:00 AM (Start Time)

Salt Filled Pantyhose 10am Salt On Roof 10am

2:00 PM

Salt Filled Pantyhose 2pm Salt On Roof 2pm

4:00 PM

Salt Filled Pantyhose 4pm Salt On Roof 4pm

The pantyhose were a bit of a bust for me.  With salt alone being so effective, why bother with the pantyhose?  I’ve heard several opinions on this:

  • The pantyhose will contain the salt and prevent runoff.  The idea is apparently to leave the pantyhose there all winter.
  • The pantyhose can be ‘flung’ on to the roof with a rope – no need for a ladder.  After the work is done, you pull the pantyhose back down.
  • The pantyhose will gradually release the salt.
  • The pantyhose method works much faster if you start by pouring water on the pantyhose.  I didn’t try this myself.
  • When salt alone is used, it will wash out within a week and the ice channel will freeze over again.

Pros: If you fling the stockings on to your roof from the ground, it’s pretty safe.

Cons: This takes a long time.  After a week of near-zero temps, the pantyhose looked just the same.  They hadn’t even made a dent. I don’t think I would have the patience to do this if I had water leaking in to my house.  Also, this could lead to damaged gutters.

Verdict: Better than nothing.

Heat Cables

For the record, heat cables aren’t supposed to be placed directly on ice dams, but some people might try it anyway.  My friend did this at a house he owned in Saint Louis Park… so I took pictures.  These photos all show the heat cables after about one day.

Heat Cables #2

Heat Cables #3

Heat Cables #4

Heat Cables #6

Pros: Gets the job done eventually, I suppose.

Cons: Heat cables aren’t made for this, and I’m sure the manufacturer would tell you that this poses some type of safety hazard.  Stringing up the cable was also very unsafe.

Verdict: Don’t do this.  Seriously.

Blowtorch

I received a request to use a blowtorch on an ice dam, so I tried it.  This video was taken about four years ago. Sorry for the poor audio.

Pros: You can tell your wife you tried everything, even a blowtorch.

Cons: Cold fingers, waste of propane, waste of time, dangerous, etc.

Verdict: I think you get the picture.

High-Temperature Pressure Washer

A pressure washer will certainly remove ice dams, but it will create a ridiculous ice mess below, and will surely damage the shingles.   This was one method that I didn’t even test.  The photo below shows what can happen to a roof after a pressure washer or high-temp pressure washer is used on a roof.

Pressure washer ice dam removal

There is a big difference between a steamer and high-temperature pressure washer.  In the video below, Steve Kuhl discusses the difference with me.

Conclusion

Ice dams are no fun. As I mentioned at the beginning of this blog, hiring a pro to steam the ice dams off is the only thing I recommend.

Oh, and one more piece of advice: if you know someone who has water leaking in to their house from ice dams, don’t tell them to “stop focusing on how to get rid of the ice dam, and spend your time fixing what caused it.”  It’s like telling someone with a gash in their finger to be more careful around knives.  “Great, thanks, now please pass the Band-Aids.”

Reuben Saltzman, Structure Tech Home Inspections

        

How To Get Rid Of Ice Dams

December 14th, 2010 | 51 comments

While I’ve already written about how to prevent ice dams from happening, I’ve found that I get far more inquiries about how to get rid of ice dams.   There are plenty of ‘hack’ methods out there, so I decided to try them out and blog about it. The methods I’m going to discuss involve axes, ice picks, pantyhose, salt, heat cables, and a blowtorch.  Of course, the most effective and safe way of getting rid of ice dams is to hire a professional ice dam removal company.

Ice Dam 3

Axe

The most obvious way to get rid of ice dams is to just take a blunt instrument and hack away at the ice dams.  I tried an axe.

Axe

Pros: Fast results – I hacked through several feet of six-inch thick ice dams in a matter of minutes.

Cons: Unsafe and cumbersome.   I had to set up a ladder on the icy ground and swing an axe while standing on a ladder.  The ice also really flew in my face – I should have been wearing goggles.  I was only able to remove the ice down to the gutter, and only able to get close to the surface of the roof without risking damage to the shingles.

Verdict: This is a high risk, but fast and effective way of getting rid of a lot of ice, but leaves the job incomplete.  You’ll probably damage your roof doing this.

Ice Pick

This sounds like a natural choice, doesn’t it?  I actually used my awl, but close enough.  I gave it my all.

Reuben's Awl

Pros: Very fast results, very little effort.  It’s as though this tool was made for picking at ice.  Oh, wait…  Still, I was genuinely surprised at how fast and accurate this method was.

Cons: Unsafe.  Again, I was jabbing at ice dams while standing on a ladder, which was sitting on the icy ground.  I also had to be very careful to not damage the roof.

Verdict: This is definitely my method of choice.  Nothing else worked nearly as well… but again, you’ll probably damage your roof doing this.

Roof Tablets

Yes, this is a product designed specifically for preventing damage from ice dams.  Contrary to the name on the container, the product doesn’t actually melt your roof (whew).  The instructions say to toss the tablets on to your roof and they’ll melt through the ice dams, allowing for “water to drain safely”.

Roof Melt Tablet Container

Roof Melt Tablet Instructions
Roof Melt Tablets

I tried tossing the tablets on the roof like the instructions said to do, but it didn’t work out very well.  I consider my tablet tossing skills to be above average, but I still couldn’t get the tablets to end up in a good location – they all just slid together in one place.  If I didn’t get a ladder out to take pictures, I never would have known that the tablets didn’t end up in a good spot.

Roof Melt Tablets Tossed

Just to give the roof melt tablets the best possible chance for success, I hand-placed them on the ice dam and I used about four times as much as the directions called for.

Roof Melt Tablets Placed Day 1

By day two, I had some pretty dramatic results – the tablets had melted all the way through the ice dam.  btw – for anyone in a southern climate that might be reading this blog, that white stuff on the ice is snow, from a very light snowfall the night before.

Roof Melt Tablets Day 2

By the third day, not much change.  There were definite holes in the ice dam, and some channels had formed for water to drain through, but the majority of the ice was still there.

Roof Melt Tablets Day 3 #2 Roof Melt Tablets Day 3 #1

Pros: If you had perfect aim and tablets didn’t move after you tossed them on to the roof, this would be very safe.  Some channels were created for water to drain through.

Cons: The tablets don’t stay where they land, which negates the whole safety thing – I still had to set up a ladder on the icy ground and move the tablets around myself.  This method was also pretty ineffective – it created a bunch of holes in the ice dam, but so what?  Most of the ice dam was still there in the end.

Verdict: This might be a nice way to get down to the roof surface, and it would be nice to follow up with an ice pick after a day or two, but the tablets alone aren’t great.  Sure, it’s safe… but so is sitting inside a warm house.  Neither gets the job done.

Salt Filled Pantyhose

This is a simple, straight-forward approach.  Take off your pantyhose, fill ‘em up with ice melt (calcium chloride or something similar), and toss ‘em on your roof.  The idea is that the salt will leak through the pantyhose and eventually melt the ice dams away to nothing.   This is supposed to work better than just putting salt directly on the roof, because salt applied directly to the roof will just melt a bunch of tiny holes, much the same way the tablets melted large holes.

Salt Filled Pantyhose Day 1

By day two, there were several tiny holes in the ice dam.  Whoop-de-doo.  Salt alone would have done this.

Salt Filled Pantyhose Day 2

By day three, the pantyhose had started to melt in to the ice dam, and had completely melted down to the roof.   The part that hadn’t melted down to the roof basically had a hard, crusty layer of salt(?) formed on the bottom of the pantyhose, and nothing else was happening.  I picked up the pantyhose, broke up all the chunks of stuck together salt, and placed it back down.

Salt Filled Pantyhose Day 3 #1 Salt Filled Pantyhose Day 3 #2

On day four, I tried moving the pantyhose again to loosen up the stuck-together chunks of salt, and the pantyhose ripped apart, leaving a big mess of salt on the roof.  Yuck.

Salt Filled Pantyhose Day 4 #1
Salt Filled Pantyhose Day 4 #2

Pros: This is pretty safe.

Cons: Took way too long and didn’t do much.  Waste of time.  I wonder if I can return the pantyhose to Walgreens?

Verdict: Better than nothing.

A better alternative might be to apply salt directly to the ice dam.  Check out the difference in my blog about salt-filled pantyhose vs. straight-up salt.

Heat Cables

For the record, heat cables aren’t supposed to be placed directly on ice dams, but some people might try it anyway.  My friend did this at a house he owns in Saint Louis Park… so I took pictures.  These photos all show the heat cables after about one day.

Heat Cables #2

Note the creative way of keeping the cables from touching each other.  Pretty cool, huh?

Heat Cables #3
Heat Cables #4
Heat Cables #6

Pros: Gets the job done, and will prevent the formation of ice dams throughout the rest of the year.

Cons: Heat cables aren’t made for this, and I’m sure the manufacturer would tell you that this poses some type of safety hazard.  Stringing up the cable was also very unsafe.  It’s a good thing my friend owns a jet pack.

Verdict: Don’t do this.

Blowtorch

I received a request to use a blowtorch on an ice dam, so I tried it.  You can see the video below.

Pros: You can tell your wife you tried everything, even a blowtorch.

Cons: Cold fingers, waste of propane, waste of time.

Verdict: I think you get the picture.

Summary

An ounce of prevention is worth a pound of cure.  My favorite method was definitely the ice pick, but this was also very unsafe, and there’s a good chance that the roof surface could get damaged this way.  I’d rather not have to deal with ice dams at all.

After a good snowfall, rake the snow off your roof.   This takes the least amount of effort and it’s safe.  I’ve been asked whether a roof rake will damage the roof, and the answer is no.  A good roof rake will have little wheels at the bottom of the rake , which prevents the bottom of the rake from even touching the surface of the roof.  Rake away.

Roof Rake Head

As I mentioned at the beginning of this blog, hiring a pro is certainly the best way to get rid of an ice dam.  The Ice Dam Company uses steam to get rid of ice dams, which is fast, safe, effective, and complete.

RELATED POST: How To Prevent Ice Dams

Reuben Saltzman, Structure Tech Home Inspections – Email – Minneapolis Home Inspections

Facebook Reuben's LinkedIn Page Follow StructureTech on Twitter ASHI Certified Home Inspector - Click To Verify Click to subscibe to Reuben's Blog

How To Get Rid Of Ice Dams

January 14th, 2010 | 13 comments

While I’ve already written about how to prevent ice dams from happening, I’ve found that I get far more inquiries about how to get rid of ice dams.   There are plenty of ‘hack’ methods out there, so I decided to try them out and blog about it. The methods I’m going to discuss involve axes, ice picks, pantyhose, salt, heat cables, and a blowtorch.  Of course, the most effective and safe way of getting rid of ice dams is to hire a professional ice dam removal company.

Ice Dam 3

Axe

The most obvious way to get rid of ice dams is to just take a blunt instrument and hack away at the ice dams.  I tried an axe.

Axe

Pros: Fast results – I hacked through several feet of six-inch thick ice dams in a matter of minutes.

Cons: Unsafe and cumbersome.   I had to set up a ladder on the icy ground and swing an axe while standing on a ladder.  The ice also really flew in my face – I should have been wearing goggles.  I was only able to remove the ice down to the gutter, and only able to get close to the surface of the roof without risking damage to the shingles.

Verdict: This is a high risk, but fast and effective way of getting rid of a lot of ice, but leaves the job incomplete.  You’ll probably damage your roof doing this.

Ice Pick

This sounds like a natural choice, doesn’t it?  I actually used my awl, but close enough.  I gave it my all.

Reuben's Awl

Pros: Very fast results, very little effort.  It’s as though this tool was made for picking at ice.  Oh, wait…  Still, I was genuinely surprised at how fast and accurate this method was.

Cons: Unsafe.  Again, I was jabbing at ice dams while standing on a ladder, which was sitting on the icy ground.  I also had to be very careful to not damage the roof.

Verdict: This is definitely my method of choice.  Nothing else worked nearly as well… but again, you’ll probably damage your roof doing this.

Roof Tablets

Yes, this is a product designed specifically for preventing damage from ice dams.  Contrary to the name on the container, the product doesn’t actually melt your roof (whew).  The instructions say to toss the tablets on to your roof and they’ll melt through the ice dams, allowing for “water to drain safely”.

Roof Melt Tablet Container

Roof Melt Tablet Instructions
Roof Melt Tablets

I tried tossing the tablets on the roof like the instructions said to do, but it didn’t work out very well.  I consider my tablet tossing skills to be above average, but I still couldn’t get the tablets to end up in a good location – they all just slid together in one place.  If I didn’t get a ladder out to take pictures, I never would have known that the tablets didn’t end up in a good spot.

Roof Melt Tablets Tossed

Just to give the roof melt tablets the best possible chance for success, I hand-placed them on the ice dam and I used about four times as much as the directions called for.

Roof Melt Tablets Placed Day 1

By day two, I had some pretty dramatic results – the tablets had melted all the way through the ice dam.  btw – for anyone in a southern climate that might be reading this blog, that white stuff on the ice is snow, from a very light snowfall the night before.

Roof Melt Tablets Day 2

By the third day, not much change.  There were definite holes in the ice dam, and some channels had formed for water to drain through, but the majority of the ice was still there.

Roof Melt Tablets Day 3 #2 Roof Melt Tablets Day 3 #1

Pros: If you had perfect aim and tablets didn’t move after you tossed them on to the roof, this would be very safe.  Some channels were created for water to drain through.

Cons: The tablets don’t stay where they land, which negates the whole safety thing – I still had to set up a ladder on the icy ground and move the tablets around myself.  This method was also pretty ineffective – it created a bunch of holes in the ice dam, but so what?  Most of the ice dam was still there in the end.

Verdict: This might be a nice way to get down to the roof surface, and it would be nice to follow up with an ice pick after a day or two, but the tablets alone aren’t great.  Sure, it’s safe… but so is sitting inside a warm house.  Neither gets the job done.

Salt Filled Pantyhose

This is a simple, straight-forward approach.  Take off your pantyhose, fill ‘em up with ice melt (calcium chloride or something similar), and toss ‘em on your roof.  The idea is that the salt will leak through the pantyhose and eventually melt the ice dams away to nothing.   This is supposed to work better than just putting salt directly on the roof, because salt applied directly to the roof will just melt a bunch of tiny holes, much the same way the tablets melted large holes.

Salt Filled Pantyhose Day 1

By day two, there were several tiny holes in the ice dam.  Whoop-de-doo.  Salt alone would have done this.

Salt Filled Pantyhose Day 2

By day three, the pantyhose had started to melt in to the ice dam, and had completely melted down to the roof.   The part that hadn’t melted down to the roof basically had a hard, crusty layer of salt(?) formed on the bottom of the pantyhose, and nothing else was happening.  I picked up the pantyhose, broke up all the chunks of stuck together salt, and placed it back down.

Salt Filled Pantyhose Day 3 #1 Salt Filled Pantyhose Day 3 #2

On day four, I tried moving the pantyhose again to loosen up the stuck-together chunks of salt, and the pantyhose ripped apart, leaving a big mess of salt on the roof.  Yuck.

Salt Filled Pantyhose Day 4 #1
Salt Filled Pantyhose Day 4 #2

Pros: This is pretty safe.

Cons: Took way too long and didn’t do much.  Waste of time.  I wonder if I can return the pantyhose to Walgreens?

Verdict: Better than nothing.

Heat Cables

For the record, heat cables aren’t supposed to be placed directly on ice dams, but some people might try it anyway.  My friend did this at a house he owns in Saint Louis Park… so I took pictures.  These photos all show the heat cables after about one day.

Heat Cables #2

Note the creative way of keeping the cables from touching each other.  Pretty cool, huh?

Heat Cables #3
Heat Cables #4
Heat Cables #6

Pros: Gets the job done, and will prevent the formation of ice dams throughout the rest of the year.

Cons: Heat cables aren’t made for this, and I’m sure the manufacturer would tell you that this poses some type of safety hazard.  Stringing up the cable was also very unsafe.  It’s a good thing my friend owns a jet pack.

Verdict: Don’t do this.

Blowtorch

I received a request to use a blowtorch on an ice dam, so I tried it.  You can see the video below.

Pros: You can tell your wife you tried everything, even a blowtorch.

Cons: Cold fingers, waste of propane, waste of time.

Verdict: I think you get the picture.

Summary

An ounce of prevention is worth a pound of cure.  My favorite method was definitely the ice pick, but this was also very unsafe, and there’s a good chance that the roof surface could get damaged this way.  I’d rather not have to deal with ice dams at all.

After a good snowfall, rake the snow off your roof.   This takes the least amount of effort and it’s safe.  I’ve been asked whether a roof rake will damage the roof, and the answer is no.  A good roof rake will have little wheels at the bottom of the rake , which prevents the bottom of the rake from even touching the surface of the roof.  Rake away.

Roof Rake Head

As I mentioned at the beginning of this blog, hiring a pro is certainly the best way to get rid of an ice dam.  The Ice Dam Company uses steam to get rid of ice dams, which is fast, safe, effective, and complete.

RELATED POST: How To Prevent Ice Dams

Reuben Saltzman, Structure Tech Home Inspections – Email – Minneapolis Home Inspections

Facebook Reuben's LinkedIn Page Follow StructureTech on Twitter ASHI Certified Home Inspector - Click To Verify Click to subscibe to Reuben's Blog