LiquidZinc® Application Instructions

Recommended Type of Sprayer

LiquidZinc® is formulated for application with an ordinary, garden pump-sprayer or 12-Volt sprayer. Since application is normally done from a ladder at the roof eave, a backpack type sprayer is recommended. This type of sprayer provides several advantages over the handheld type. Most important, it is safer since it frees a hand to hold the ladder. Pumping is easier since a pumping lever is located at the side (some units allow switching the lever based on right or left hand use) so tank pressurization is accomplished by using only one hand – again a safety consideration. Also, backpack sprayers normally provide higher operating pressures making it easier to spray to the top of the roof from the eave. These sprayers are normally available at home and garden supply stores as well as hardware stores. Battery powered backpack sprayers are becoming more readily available online as well which requires no pumping.

An extension wand is also a handy accessory when applying LiquidZinc® as it allows easier application of product to the higher parts of the roof. Also, with an extension wand, more roof area can be sprayed from each ladder location minimizing the number of times the ladder must be moved thereby reducing the overall job time.

General Procedures

  • Roof should be clean before application of LiquidZinc®.
  • Shake container of LiquidZinc® well before using.
  • Do not spray when it is windy.
  • Apply when roof is dry.
  • Avoid heat of the day – late afternoon is best.
  • Do NOT rinse roof after application. For best results, do not apply product if rain is expected within 24 hours.
  • Do not apply when the temperature is below freezing.
  • Wet surrounding plants using garden hose before & after application of product to roof.

Mixing Instructions

  • Apply using a standard garden pump sprayer.
  • Correct dilution ratio is 8-parts water mixed with 1-part LiquidZinc®(8:1).
  • For each gallon of diluted mixture, add 1-tablespoon of household liquid dishwashing detergent.
  • Stir well but don’t shake (avoid creating foam).

Example – fill sprayer tank with 2-gallons of water then add 1-quart (1/4-gallon) of LiquidZinc®. Add 2-tablespoons of liquid dishwashing detergent.

Application Instructions – Clean Roofs/ Preventative Maintenance

  • Spray roof from bottom to top.
  • Do not spray bottom 2-3 rows of shingles -rain will spread product down to this area.
  • Apply spray heavier on top 4-5 rows of shingles.
  • For best results, apply LiquidZinc® every 12 to 18 months before stains begin to show up (but immediately at the first hint of any stains in order to avoid having to clean the roof).

Coverage

  • Coverage should be approximately 330 square feet of roofing per 1-gallon of diluted mixture.
  • One gallon of LiquidZinc® diluted 8:1 will treat approximately 3,000-4,500 square feet of roof (enough for 2 applications on an average size roof of 2,000 sq. ft.).

ZincShield® Installation

Be sure to order GSP-95® Adhesive or ZincShield® Nails
along with your Rolls of ZincShield
®
to Insure Correct Installation

ZincShield® is installed at the top of the roof below the ridge cap, ridge vent or below the first row of shingles.  If the roof has multiple ridges, install ZincShield®at the top of each ridge.  It should normally be installed on both sides of each roof ridge (see example pictures – suggested ZincShield® installation is indicated in red).
ZincShield® should be also be installed below any obstruction that interferes with or blocks the normal flow of rainwater over ZincShield® and on down the roof. This includes chimneys, dormers, skylights, etc. ZincShield® should be cut to length as required using scissors or tin snips.

Installation on an Existing Roof
If your roof is currently stained, it should be treated to kill the stain causing organisms prior to installation of ZincShield® with aour product Roof-Be-Clean® .
Using 2.5″ or 3.5″ wide ZincShield®, install by butting the zinc strip against the ridge vent, roof cap or the top most row of shingles at the roof ridge.  (If possible, it is best to slide about 1/4″ under the roof ridge vent, roof cap or the top row of shingles).  When our GSP-95® Adhesive is used, apply quarter to half-dollar (1-1/4″ to 1-1/2″) size spots of adhesive at approximately 1-foot intervals pressing the zinc strip down flat to the roof as you move along. Use a standard caulking gun for adhesive application. (Note: Do not apply a continuous bead of adhesive as it will block the flow of water/moisture should any rain get under the strip or if any condensation should occur under the strip).
If nails are used, nail at approximately two-foot intervals using ZincShield® Nails with the provided rubber washers to seal the nail holes. Our nails are of the highest quality and have EPDM rubber washers that seal the nail holes. These nails are designed to be rust free for the life of your roof.

Installation when Reroofing or for a New House Application
Using the 3.5″ wide ZincShield®, install so that 3/4″ to 1″ is under the ridge vent, roof cap
or the top most row of shingles.  
When our GSP-95® Adhesive is used, apply quarter to half-dollar (1-1/4″ to 1-1/2″) size spots of adhesive at approximately 1-foot intervals pressing the zinc strip down flat to the roof as you move along. Use a standard caulking gun for adhesive application. (Note: Do not apply a continuous bead of adhesive it will block the flow of water/moisture should any rain get under the strip or if any condensation should occur under the strip).

If nails are used, nail at approximately two-foot intervals using ZincShield® Nails or good quality roofing nails but do NOT use rubber washers as the nails should be placed UNDER the ridge vent, roof cap or top most row of shingles and thus the nail heads are not exposed.

For all Roofs
If the total distance below any strip of ZincShield® exceeds approximately 20-feet, add another strip of ZincShield® at that point (i.e., ZincShield® is effective for about 20-feet below the strip) to protect the lower area.  Using fully exposed 3.5″ ZincShield® in place of the 2.5″ will increase the effective distance of the ZincShield® to approximately 30-feet.
Due to the heights and/or steep pitch of many roofs, working on a roof is dangerous.
We recommend that you have a professional roofer or contractor install your ZincShield®.

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