Spray Foam

Spray Foam

New addition before spray foam application.  Note 2 x 6 inch walls for energy efficiency.

Same wall after spray foam installation.

Addition roof deck before spray foam.

Spray foam placed behind outlets first to prevent them from pushing out during main application.  Note open framing at corners to allow for insulation.

Same wall after spray foam installation.

Masking off windows to protect them from overspray.  Note raised heel trusses and 2 ft on center framing for energy efficiency.

Setting fans to exhaust air from work area to help improve air quality after application.

Workers applying open cell foam in wall cavities, then trimming flush with face of studs.

Same area after spraying complete but before being trimmed.

Same small utility area after completion and cleanup.  This is where addition connects to existing home and old siding has not yet been removed where exterior wall has now become an interior wall.

Workers starting to apply open cell foam to underside of roof deck.

Walls at stairwell after being trimmed.  Open cell foam was used here for sound deadening.

Starting to spray roof cavity.  Note that foam is allowed to extend over face of trusses so that thermal bridging does not occur.

A few seconds later during application the foam has started to rise.  Foam is also extended into soffit area, which has been constructed without ventilation.

Open cell foam in exterior wall before being trimmed.

Open cell foam in same wall after trimming and cleanup.  Closed cell foam has been installed in roof cavities.

Room after installation complete.  Open cell foam in roof cavities, closed cell foam in exterior wall cavities.

View of finished roof area with open cell foam.

View of finished roof area with closed cell foam.  Note the absence of a ridge vent.  The attic areas will be unvented and a small amount of conditioned air from the HVAC system will be supplied instead, to keep the humidity levels low and the space dry and clean.

Insulate Addition With Spray Foam Project, Summer 2016. Knoxville,TN. $4.5K.

This customer had built a 740 sf addition to their home, using advanced framing techniques and installing energy-efficient windows and doors. Their goal was to make the addition as energy efficient as possible by also installing spray foam insulation.

First, the area was prepared by masking off doors and windows to protect them from overspray.  Then, 2 inches of closed cell spray foam was applied to the wall cavities, to achieve R-14.  This was followed by installing 6 inches of open cell foam in the roof cavities, to achieve R-22.

Due to the air sealing qualities of spray foam, the true insulating value of these materials is somewhat better than these ‘prescriptive’ R-values, which were established for more traditional insulation materials such as fiberglass and cellulose.  This addition will be very comfortable and easy to heat and cool during every season as a result.

 

Water Intrusion

Water Intrusion

Water is a building’s worst enemy.  If a building’s components are not protected from exposure to water, serious structural damage can result. 

 The ground around a building should be sloped to direct surface water away from the foundation.  This is a crucial element of design that is often overlooked by builders and developers.

When the ground slopes toward your home or business, surface water can get inside through the foundation walls and cause settling, decay, and mold to set in.

Mold on Wall. The sheetrock on this bathroom wall was waterlogged and very moldy.

Utility Locate. Buried utilities were marked before digging began. The ditch had to be hand dug due to its proximity to an existing natural gas line (yellow stripes).

Hand digging.  The trench was slowly widened and deepened to prevent damage to the natural gas line nearby.

Ready for Drain.  Once the trench was dug, the drain was laid out beside it to be cut to length.

System Install in Progress.  Drain is in place and gravel is being placed over it.

Completed Drain System.  Gravel is left exposed at ground surface to better intercept water.  Soil from trench is piled on low side of trench to create a berm that further prevents water from escaping.  This berm can be landscaped with grass by customer.

Downspout Connection.  A tee was installed in the drain line and a section was added to allow a gutter downspout to discharge into it.

New Sheetrock.  Sheetrock has been replaced and is in the process of being finished.

Site Drainage Project, Summer 2016, Knoxville, TN.  $3.6K

This customer had a home which was located on a hill below several others.  As a result, water from all these properties was running downhill to his yard and infiltrating his foundation during rain events.  The exterior siding and the sheetrock on the interior of his home was being damaged by this water.

Water is a building’s worst enemy.  If a building’s components are not protected from exposure to water, serious structural damage can result.  The ground around a building should be sloped to direct surface water away from the foundation.  This is a crucial element of design that is often overlooked by builders and developers.

To rectify this problem, Green River installed an 80 foot drain to intercept and move water from the adjoining properties away from the building.  We also tied in the home’s gutter downspouts that were in proximity to the drain, to move that water away as well.

A small section of the home’s retaining wall was rebuilt and the interior bathroom wall was repaired by removing and replacing the sheetrock.

Water Intrusion

Water Intrusion

Water Leak in Garage

Garage was taking in rainwater runoff , which was causing mold on walls.

Site Inspection

Green River did a site inspection to determine causes of water intrusion

French Drain System Installed

A French drain system was installed to control water intrusion because the grade sloped toward the house.

Gutters

The gutters downspouts were tied in.

Garage Walls Water Damage

Garage walls were wet behind drywall from water intrusion due to site grade issues and improper flashing at exterior wall.

Water Damage Repaired

Garage wall was repaired after water intrusion was stopped.

Driveway Repair

Driveway was repaired where drain channel went through. The drain daylights down-slope.

Metal Roofing

Metal Roofing

Before

Failing paint coat and bad flashing

Before

Poorly built chimney

Before

Caulking at leaks

Before

Poor flashing at chimney, fasteners installed on ribs

During

Working on right side

During

Working on right side sections

During

View of the many profiles of this roof

During

View of chimney being rebuilt

During

Top section complete and being trimmed out

During

Tearing down chimney for  rebuild

During

Right side section complete

During

Panels being set on back side of highest section

During

New synthetic under-layment and drip edge being installed

During

New stone work on chimney

During

New roof panels being set on highest exposure

After

Completed roof

After

View of rear sections of completed roof

After

Front view of completed roof

After

Completed roof over garage end of home

After

View of completed roof

After

Completed chimney

ENERGY STAR Metal Roof Project, Spring 2014. Knoxville, TN. $46K. This customer had an existing metal roof that was poorly installed and made of inferior material. The paint coat was faded and flaking off. The customer’s existing roof was leaking at the valleys and at the fasteners. The fasteners were installed on top of the ridges, which were too narrow to fully support and seat the washers and allow them to seal out water.

Green River replaced the roof with 29 gauge ENERGY STAR metal, guaranteed for 40 years. This metal has a pigment in the paint coat that reflects sunlight and reduces attic temperatures by as much as 50 degrees. The existing roof panels and underlayment were removed and the sheathing was inspected for damage, prior to starting the new installation.

First, new drip edge was placed along the roof’s edge, then synthetic underlayment was installed, followed by new 3 foot wide 29 gauge ENERGY STAR roof panels factory cut to the correct length. Sidewall flashing, valley flashing, transitions, rake trim, ridge and valley caps were also installed. The finished roof consisted of 28 different facets, with pitches ranging from 12/12 to 4/12 and an overall size of 54 squares.

As part of the project, the existing chimney was rebuilt. It was not tall enough to draft properly. It was not properly flashed and water was coming into the house around it.

Energy Efficiency

Energy Efficiency

Interior Inspection

A modular log building was constructed for use as a conference center. The manufacturer hired Green River to help them improve their already good energy efficiency standards in their building process.

Blower Door Test

A blower door test was used along with thermal imaging camera to test how air-tight this typical cabin had been built.

Cabin Windows

The blower door draws in air from leaky places, and the infrared camera picks up the colder outside air as a different color. Opportunities to improve caulking around wall top plates, trim, windows, and beams were discovered.

Recessed Lights

Air intrusion around recessed lighting is a common issue. The log home manufacturer changed their materials purchasing to use air-tight fixtures after seeing the problem.

Air Intrusion Through Attic Hatch

This attic access hatch was allowing a lot of air intrusion. The log home company added weather-stripping to their process to remedy this problem.

Door Trim

The method was changed so that the doors were sealed around the rough openings with special window and door spray foam on future cabins to prevent air leaks.

Air Leaks

The blower door draws in air from leaky places, and the infrared camera picks up the colder outside air as a different color. Opportunities to improve caulking around wall top plates, trim, windows, and beams were discovered.

Energy Efficiency

As a result of Green River LLC consulting with this manufacturer, they now produce highly energy-efficient log homes that are shipped all over America, and that receive good scores on their HERS Ratings.