Category Archives: Why Windows Get Dirty

Does Rain Mess Up My Windows?

After getting so much rain this spring, and it continuing to be in the forecast, many of you may be wondering if rain really messes up your clean windows. The short answer is, rain does not mess up your windows, dirt does. 

Rain that hits an already dirty window does indeed make the window look worse than before, but that is because the rain is sticking to the dirt, pollen and debris that is already there. Other ways your windows will get dirty is the rain picking up dirt from your roof, gutters, trees, siding, or even the window frames that hold dirt in the crevices, and washing down onto your windows or just splashing on the ground and back onto low basement windows, will result in dirty windows. Mowing grass or landscaping and construction projects create dust and dirt that clings to windows, making them dirty.

Dirty rain on window frame

When the window is clean, the rain has nothing to cling to and just rolls down the glass, leaving it just as before, clean. Rainwater is much purer than our hard mountain water which, if left on the glass too long will leave hard water stains. Groundwater contains minerals and particles that are not usually found in rainwater. If groundwater is left to dry on the glass, the result is white spots or streaks that over time, start to build up if not removed. Just think of how your shower glass looks if water is left to dry on it. 

Rain rinses off dust, dirt, and pollen off of exterior surfaces.  If your windows are clean, it helps keep dirt and pollen from accumulating on the glass.  If there is no dirt on the window, there is nothing to create a spot when it rains.  

Storm Clouds in Evergreen, CO

Rain also helps keep the particles and dust in the air down resulting in cleaner air. If the air is clean, less will accumulate on your windows, keeping them cleaner longer.  

In general, clean windows and rain just results in cleaner windows. Deciding to skip window cleanings due to the weather, can lead to damage due to buildup of debris if not removed regularly. So don’t wait to schedule your regular maintenance window cleaning due to the rain.

Hard Water Stains

A common problem we see on windows is hard water staining. Our water in the mountains is quite hard and contains an abundance of minerals and other solids. This hard water can get on glass in a number of ways. The most common is sprinklers or irrigation that is being sprayed on the glass. One of the dirtiest is water dripping off a tile roof. Water splashing off of trees or other plants. You can even find it splashing up from the dog’s water bowl! Unfortunately, it is very easy to do damage with a simple spray of the garden hose or just washing the house and leaving the water to dry on the glass. 

So what is happening? These minerals remain after the water has dried. Worse yet, they start to build up very quickly. My house has several windows that have been stained with only 2-3 splashings of the hose. Think of the cave formation, the stalagmite. The drip, drip, drip of water over the years will result in quite a hard water stain. While I have yet to see a stalagmite growing out of a window, I have seen a deposit close to 1/8″ thick!

How do I get it off? Here is the problem, it is now part of the glass. They make all sorts of powders, pastes, creams, chemicals, and acids. I have tried many through the years and nothing works too well. Our procedure is a bit more environmentally friendly, and straight from a customer. We use full-strength vinegar with a bronze wool pad. This method does a nice job of shining up the glass. It will not completely remove the stain if the deposit is bad enough, no improvement will be revealed. A product called Crystal Clear 550 is commonly the go-to product. This stuff is a wicked strong acid. I will not use this product due to its extremely dangerous properties. Damage to paint, seals, siding, and trim, not to mention the health of all of us.

We will always try to inform the customer of hard water stains and their possible causes. Fix your splash and enjoy clean again! 

Monsoon Season in Colorado

This time of year in Colorado is considered monsoon season and we can expect afternoon storms on a daily basis. A monsoon is a large wind change that brings lots of moisture from the Pacific Ocean and the California Gulf.

In Colorado, monsoon season usually starts in July and lasts through August. It’s when afternoon thunderstorms are most frequent and severe. Monsoon storms tend to develop in the mountains and drop down into the plains. The storms are typically slow moving and produce heavy rains, which can cause flash floods.

Example forecast for July/August in Colorado.

So how does this season affect your windows? A good clean rain won’t mess up windows, but if the rainfall picks up dirt from somewhere such as the roof, gutters, trees over the house, or splashes up from the ground, it will. So it depends on how big the overhangs are on the house for the most part and whether it’s a driving rain with wind.

We recommend scheduling a gutter cleaning, so the excess debris can be cleaned out. That will help reduce the chance of the gutters overflowing and getting debris on the windows. A great part about Peak Window Cleaning gutter cleaning service is that roof debris is also cleaned off, which helps keep your windows cleaner during the monsoon season.

Looking to learn more about Colorado’s monsoon season? Check out this great video from KOAA: Monsoon Season is Arriving: What does it mean for you?

The Broken Seal

The window cleaner has finished the job and the glass still looks foggy, hazy, has drip marks or even water still on the glass. Terrible work? More likely a broken seal. Most all homes have thermopane windows. Thermopanes have two pieces of glass sandwiched together by a spacer that is usually 1/2” to ¾” thick. This spacer adheres the two pieces together and contains small beads of desiccant. The desiccants job is to prevent the buildup of moisture in between the panes of glass. When the seal “breaks” moisture is allowed to enter the space between the glass and starts to become a visual issue.

Different degrees of failure are easy to spot. A window with a light fog around the edges has just begun to go, but could equally stay the same or get worse. Bad examples can be full blown rain storms in between the panes! If the humidity levels can’t be kept at some sort of equilibrium between the interior and exterior of the home, condensation will form in the thermopane. This is why on a cold wet day things might look worse. The symptoms might not even be apparent on a sunny 70 degree day.

I observe these conditions in about 98% of the homes I do, so you are not alone. I have also noticed that most all window manufacturers have this problem. I strongly suspect that it has to do with our altitude. Windows that are built and sealed together at a much lower altitude have a lot of atmospheric pressure changes to deal with when heading ‘up the hill’. Some are built with small capillary tubes to deal with this. If they are not properly crimped when installed, it is an easy point for air intrusion.

Some windows seem to be more prone to failure than others. Large panes of glass that have site built frames are usually the worst. Add lots of sunlight or exposure to wind and the risk expands significantly. Odd shaped widows are also problematic. However, sliding glass doors seem to be immune to the broken seal. The one thing that will kill a window faster than anything is tint. Window films will not allow heat to pass through the glass. It is like taping a lid on a boiling pot of water, something has to give.

So what are your options?  The problem is visual more than anything. Unless there is a huge amount of water in between, the damage is not bad. It may be ugly to look out but really shouldn’t cause much, if any, harm.  Glass has an insulating value between R-2 and R-6 so no great losses in that area. A few companies offer in place repairs which usually involve drilling a few holes in the glass to “let off some steam”. I’ve seen some improvements with this method. If you have real bad mineral deposits or drips, skip this route. Really all that can be done to fix the problem is replacing the glass. More often than not, just the glass can be replaced. Not having the frame or the whole window assembly can bring the price of replacement back down to earth. The choice is yours, but it is really just visual.

Pine Pollen

This time of year in the mountains, you take a deep breath and the scent of warm pine fills your nose. Springtime in the mountains is a rejuvenating season of new growth and greening. However, mountain residents are familiar with the yellow cloud of dust, PINE POLLEN. Buildup from the pollen gets on everything including your windows!

At Peak Window Cleaning, we have 25 years of experience living with pine pollen. We get all kinds of questions about the pollen, so we are going to answer the most common, like what it is and when does it fly.

Example of male cones that produce the pollen.

What is the yellow dust? In a nutshell, the yellow dust is apart the fertilization process for Conifers. These ancient trees are Gymnosperms and rather than a typical flower, they have cones. So birds and insects are little help to pollinate. The trees depend on the wind. The trees release a large amount of the yellow dust to increase the chance of pollination.

When does the pine pollen season start? Warm temperatures are the trigger for the process. So in Evergreen, Colorado one can expect when temperatures start to reach above 70°F during the day, which is about mid-June, the pollen will start to fly. The trees will release the most pollen on warm, dry, sunny, and windy days.

Example of male and female pine cones.

When does it end? The length of time the pine pollen flies varieties each year. In the mountain communities, the pine pollen typically flies for about two to three weeks. The dust is usually done by the first few weeks of July.

What makes some years worse than others? It actually depends on the previous season. For example, a very dry year followed by a year of good rain fall, the trees will release a very large amount. In a dry year the trees lay more dormant because of the lack of moisture, as if it knows it has a less likely chance to achieve pollination.

Now that we have answered some of the most common questions about the yellow dust, we hope you will be able to plan for the pine pollen.