Robert Evans' Jr Blog

How To Prevent Ice Dams From Forming on Your Roof

Posted by Dan MacDonald on Nov 16, 2018 10:45:29 AM

If you have icicles along your eaves/overhangs, or ice collecting on your roof , Proper attic insulation may be the Key to help keep that frozen precipitation from building up .

Heavy snowfall can be a nice sight as it happens but there are a number of problems that can result from these storms. What do you do when you notice water pouring down the inside of your walls and the ice starts ripping off your gutters ? The key is to find a cure to the problem before it gets to this point .

Icicles form along the eaves/overhangs on your house as a result of a warm attic to heat loss through your poorly insulated ceiling . This causes the heat from the inside the house to melt the snow on the roof before the sun can melt the snow and it collects at the eaves, which are colder because there is no heat above the overhang.

Can icicles damage my house?

The result of icicles that develop along your eaves/overhangs is potential leaks inside your walls when the ice also builds up on the roof. This Buildup of ice and snow is called an Ice Dam.

The cure for this is a two-step. The heat loss can be stopped with proper insulation, usually standards are 13 inches of blown-in cellulose fiber insulation R49 is recommended.

The Other half of this cure is proper ventilation at eaves and at the ridge of the house. This is done by adding soffit vents and a quality ridge vent.

Your Insulation specialist should be able to recommend you on the number and lengths of vents needed . The typically recommended is 1 square foot of vent for every 150 sq. feet of attic space .

If you have ice dams that end up forming on your roof , best advise is to Hire a professional contractor to clear the ice , or you can risk doing considerable damage to your roof or even worse ,seriously injuring yourself .


Tags: roofing metrowest, roofs, ice dams, ice and water barrier, ice dam framingham, roof natick, Attic ventilation and ice dams, roof shoveled, roof work, water damage, storm damage

Ice Dams

Posted by Robert Evans on Jun 2, 2014 6:53:00 PM

It might seem a little bit strange to be talking about ice dams in June , but now is the time to deal with them. One customer in Natick was having ice damming issues on his Campanelli ranch which are very prone to ice dams. This particular house had a addition on the back with a low pitched roof on the north side of the house. This combination is what it takes for an ice dam. Instead of waiting until the last minute he decided to get it done now.The resolution was strip off the shingles and install a rubber roof. No more shoveling his roof this winter.photoMA30984285 0001 resized 600photo1MA30984286 0002 resized 600photo2MA30984286 0003 resized 600

Tags: roofing metrowest, EPDM, roofs, ice dams, ice dam removal, roof Framingham, rubber roof, shed dormer, roof metrowest, roof natick, wayland ma., Firestone roofing, firestone roof, firestone contractor, firestone rubber roof

Window Leaks

Posted by Robert Evans on Dec 12, 2013 1:22:00 PM

Window Leaks


1: Very complex window layout and no overhangs.
As you can see above, the window openings in this house are many and complex. There are tall windows, arched windows, bay windows. And this would be fine, providing they were installed with all the bells and whistles (flashings, sealants) that prevent water from leaking in. But the sections of wall that have no overhangs may present a problem. Typically we homeowners think the main functions of overhangs are to create shade and drain water off the roof. But they also keep wind-driven rainwater from pushing into the walls through the windows. If you're ever in the position to design a house or an addition to your house, it's wise to include overhangs.

2: Angled fascia.
With the fascia (the horizontal board above the window) angled inward, it doesn't take too much building knowledge to see that water from the roof will be directed right toward this window. The sloppy flashing (extra-strong insulating material between the window and house framing) gives water even more of an opportunity to seep in. Which leads us to...


3: Poorly installed flashing.
To keep water from getting inside your walls and causing all kinds of trouble, there must be a good integration between the window, the building paper (bottom right and left) and the flashing (the stronger material around the arch). In the picture above, the flashing is cobbled together and each break in its surface creates an opportunity for water to enter. In a correct installation, a stretchable flashing is used in one continuous piece, as opposed to patches.

4: Misuse of materials.
In this case, house wrap (building paper) is being used as the window flashing. For superior water protection, the carpenter should have used specially made flashing material. It's stronger and does a better job around windows than the house wrap, which goes behind the home's siding or brick.


5: No flashing at all.
We have to hope this window was just set into place temporarily and will be removed later so that flashing tape can be installed properly. If flashing tape isn't installed the right way, water will get behind whatever kind of siding is put up (and water always gets behind siding) and then drip behind the mounting flange (the outermost edge of this window frame) and into the walls. It's a good idea to use caulking to seal your windows, in addition to flashing tape.


6: Missing sealant, wrong type of nails.
You can see some sealant (caulk) behind the mounting flange on this window, but not enough. There should be a continuous bead of sealant behind the flange, and it should ooze out of any unfilled nail holes. And about those nails: They are obviously not corrosion-resistant (which is required), as you can already see the rust coming on. Plus, they were shot out of a nail gun (as evidenced by the little orange tab on the left nail). According to many experts, this is not a good practice, as window flanges require a precise fastener pressure and that is hard to control with a tool powered by compressed air.

7: Not shingle style.
If you want to know the secret to moisture management it is this: shingle style. That means that the top layers of a surface overlap the bottom layers. That allows gravity to move water down and away from the structure. If you violate this basic principle and put a top layer behind a bottom layer, you're inviting water to come right in. In the photo above, the white building paper above the window should be lapping over the black flashing. It's possible that with super-wide overhangs, and not much rain and not much wind, this penetration may not leak. But bring on some wind-driven rain and you've got trouble.

Kathy Price-Robinson

8: Cracked glazing putty.
This is easily corrected. Just pry it out and redo it. If not, moisture will continue to deteriorate this wood frame.

9: Lack of a paint seal.
Here's something you may not know: When painting the exterior molding that holds a window into place, the paint should slightly overlap onto the glass. This may seem shocking as we typically do everything possible not to get paint on our windows. But the continuous membrane of the paint from the molding onto the glass creates a seal that is actually part of a moisture protection strategy. Professional painters and savvy DIYers already know this.

For more information on proper window installation, consult the industry bible on this topic, known as ASTM E 2112. ASTM stands for American Society for Testing and Materials, but now it is an international standards organization.

Tags: roofs, Architectural shingles, ice dams, ice and water barrier, commercial roof leaks, Grace Ice and water Barrier, old skylights, harvey replacement windows

Ice Dam

Posted by Robert Evans on Dec 6, 2013 10:11:00 AM

Ice Dam on roofs of buildings and houses

Ice build up on slate roof
Ice dam forming on slate roof

An ice dam, on a smaller scale, is a problem of house and building maintenance in cold climates. An ice dam can occur when snow accumulates on the slanted roof of a house with inadequate insulation. Heat conducted through the insufficient insulation and warm air from the attic bypasses warms the roof and melts the snow on those areas of the roof that are above living spaces, but does not melt the snow on roof overhangs.  Meltwater flows down the roof, under the blanket of snow, onto the eave and into the gutter, where colder conditions on the overhang cause it to freeze. Eventually, ice accumulates along the eave and in the gutter. Snow that melts later cannot drain properly through the ice on the eave and in the gutter, resulting in leaks to the roof space resulting in damaged ceilings, walls, roof structure and insulation. Snow guards or snow retention systems can help prevent ice dams on some roofs. The ice that builds up on the roof can be removed by trained professionals that use special steam equipment to ensure quick and safe removal without causing damage to the roof.

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Tags: Architectural shingles, Certainteed Landmark, ice dams, ice and water barrier, ice dam removal, attic ventilation, cobra ridge vent, ice dam framingham, roof installation

Certainteed Framingham Roof

Posted by Robert Evans on Sep 4, 2013 2:58:00 PM

This large ranch in Framingham Ma. called on Robert Evans Jr. Contracting to install a Lifetime Certainteed Landmark Architectural shingles with a Granite Gray color.


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Tags:, CDX plywood, certainteed roof, Certainteed Lifetime roof, Architectural shingles, Certainteed Landmark, ice dams, ice and water barrier, roof Framingham, cobra ridge vent, ice dam framingham, roof installation, roof leaks

Ice and water barrier

Posted by Robert Evans on Aug 27, 2013 12:31:00 PM

Home owner in Wellesley was have ice damming issues last winter and was proactive this year and getting it fixed before winter. Roof and wall were stripped and ice and water barrier installed and then new Certainteed shingles installed.IMG 2791MA30907953 0004 resized 600 

Tags: certainteed roof, Certainteed Lifetime roof, Architectural shingles, ice dams, ice dam removal, Grace Ice and water Barrier

We Work all Four Seasons at Robert Evans Contracting

Posted by Robert Evans on Dec 10, 2012 9:44:00 AM

Certainteed ShinglesSchedule your FREE Roofing Assessment Today!


Robert Evans Jr Contracting , INC.
Whether it's a 50,000 square foot building, or a 1200 square foot home you simply have to be covered no matter the Season- Winter, Spring, Summer, Fall,We Work all Four Seasons !! Plus, with rising costs, you don't want yoRoof being about to be stripedur heating bills to go through the roof. Hence, it's very important to make sure your roof is replaced when needed, accurately installed and adequately maintained. That's where Robert Evans Jr Contracting, Inc comes in. With more than 22 years in business, we've built our sterling reputation on quality workmanship and years of customer satisfaction.

The family at Robert Evans Jr Contracting, Inc. strives to provide the highest level of professionalism, quality, and customer service, that is unrivaled in the roofing industry. NO matter if its a hot sweltering mid-summer day or cold blustery winter morning, our crew is prepared for all the elements and We stand behind all of our work, and go beyond expectations to insure that every customer is completely satisfied and every roof is successfully installed. With a Quality Control Supervisor on evey roof that is being worked on.

To continue to grow and build our reputation as the number one choice in professional roofing, through providing unsurpassed service, honesty, quality workmanship, and complete customer satisfaction.

Services$300 Roofing Coupon

Tags: roofing metrowest, Architectural shingles, Certainteed Landmark, ice dams, ice and water barrier, Four seasons, firestone rubber roof

Attic Exhaust Ventilation

Posted by Robert Evans on Dec 5, 2012 1:37:00 PM

Schedule your FREE Roofing Assessment Today! 

Effective attic ventilation is critical for a long-lasting roof ! A properly balanced attic ventilation system will help to:

  • Remove excess heat and moisture to protect your roof from premature deterioration
  • Prevent roof rot in your attic or roof deck
  • Minimize peeling and extend the life of exterior and interior paint
  • Limit the growth of harmful mold
  • Safeguard your attic possessions against mildew damage
  • Guard against ice damming in harsh winter climates
  • Possibly reduce excessive heating and air conditioning costs

Stale Air Escapes Through Cobra Exhaust Vent { Installed under ridge cap shingles }Fresh air enters attic through intake vent at soffit or eave

-Speak to a Roofing Professional!-Having Roof Issues? Schedule Your FREE Roofing As


Tags: CDX plywood, ice dams, attic ventilation, cobra ridge vent, Re-sheathed

Rain Flow Total Gutter Protection System

Posted by Robert Evans on Aug 9, 2012 3:35:00 PM

1. What is Rain Flow? Rain Flow Total Gutter Protection System Is gutter protection system that prevents leaves, pine needles, twigs and other debris from collecting in and clogging rain gutters. Water flows through quickly and easily. Rain Flow is environmentally friendly, being made of all natural fibers and coated with a UV stable premium acrylic latex.

2. How Does Rain Flow Work? Because leaves, seeds, pine needles, pinecones and other debris are suspended on top of Rain Flow, gutters continue to as intended. Air circulation above, below, and around debris allow it to dry up quickly and blow away in the wind.

3. Will anything clog Rain Flow material? Rain Flow will not clog. Because of its design, every rainfall washes it clean and gutters remain free flowing.Contact Us

4. Will shingle grit affect Rain Flow? Shingle grit will not affect Rain Flow. It simply passes through as if the gutters were empty.-$300 OFF ROOFING ESTIMATE

5. Will Rain Flow cause Ice Dams? Rain Flow will not cause nor prevent ice dams. Ice dams are caused by temperature changes in the roof and are related to ventilation and insulation conditions in the attic space.-Request a Qoute! However , Rain Flow will keep snow from collecting in the gutter allowing snow to melt and drain.


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Tags: Gutter Guards, ice dams, ice dam removal, Rain Flow Total Gutter Protection System

Ice Dams

Posted by Robert Evans on Dec 30, 2010 5:01:00 PM

Its that time of year again when the snow flies and with it comes ice dams. As the snow pack begins to build up on roofs it begins to act as an insulator. Improporly vented or insulated house will being to melt the snow from the bottom. As the melted snow runs down the roof it will inevitably run into cold air be it from the over hang or out from underneath snow. As the dam begins to build up, eventually the melted snow can know longer flow off the roof and begins to travel back up the roof.

Some people think that taking a snow rake to the edge of the roof is the solution. There are two significant problems with this theory.   The first is that raking the snow off the roof also removes some of the granules from the shingles which shortens the life of roof. The second is that in conditions of extreme cold, only removing the lower couple of feet of snow can back the ice dam farther up the roof.

Solutions to ice dams include: proper ventilation with a soffit and ridge vent, installing a new roof with a minimum of six feet of ice and water barrier, proper attic ventilation, and the best is all of the above.

Tags: roofs, ice dams, cobra ridge vent, soffit vents