Calculator

These calculations will help you determine the square footage for the proper amount of stain and prepping supplies needed to refinish your deck or fence using TWP 100 or TWP 1500 Series.

This is intended to provide you with an approximate estimate only. Material requirements may vary according to application method, surface condition, and weather conditions.

Prepping Options

  • Gemini Restore Kit. This will be used for new, gray, dirty decks and for applying TWP over an intact older coating of TWP.
  • Restore-A-Deck Stripper and Restore-A-Deck Brightener. This is used for removing old coatings of stain. Use this if you are switching from a different brand to TWP or if you have a neglected coating of TWP that has failed unevenly.

Deck Sq. Footage

Flooring Length x width =?

Railing Length x height =?

Steps Width x Depth x #of Steps =?

Add up all 3 for the Total Sq. footage.

Fence Sq. Footage

Length x height =?

Multiply x 2 for both sides = Total Sq. Footage

If you have questions, please ask below.

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    TWP Stains · 06/07/2015
    Al Turnauer:
    i had a new cedar deck in 2013. I made the mistake of putting Sherwin Williams Deckscape sealer/stain on it after waiting 12 months and following powerwashing. The SW product started peeling off during the winter following its application in August 2014. So, the deck was just powerwashed again this week to remove the SW stain/sealer and most, but not all the stain came off. The only places it remains adhered to the deck is on the knots in the cedar.
    Question is, should I use a wood prep product before applying your oil based stain/sealer? If so, which one? How long should I wait to apply sealer/stain after wood prep, if needed? Is TWP 1500 the best product for cedar deck stain/sealing and if yes, should I do 2 coats or 1 coat? And, lastly, how often (1 year, 2 years, etc) will I need to re-apply the TWP product to maximize protection of the deck?

    Yes try the Gemini Restore Kit for the prep. Apply 2 light coats of the TWP 1500 but apply wet on wet method. Reapply every 2 years.
  • We will reply to your comment shortly
    Al Turnauer · 06/05/2015
    i had a new cedar deck in 2013. I made the mistake of putting Sherwin Williams Deckscape sealer/stain on it after waiting 12 months and following powerwashing. The SW product started peeling off during the winter following its application in August 2014. So, the deck was just powerwashed again this week to remove the SW stain/sealer and most, but not all the stain came off. The only places it remains adhered to the deck is on the knots in the cedar.
    Question is, should I use a wood prep product before applying your oil based stain/sealer? If so, which one? How long should I wait to apply sealer/stain after wood prep, if needed? Is TWP 1500 the best product for cedar deck stain/sealing and if yes, should I do 2 coats or 1 coat? And, lastly, how often (1 year, 2 years, etc) will I need to re-apply the TWP product to maximize protection of the deck?
  • We will reply to your comment shortly
    TWP Stains · 06/04/2015
    Dale Gjerning:
    I have a wood deck that has not been treated for several years and is in need of a good treatment. What type of Restore application do you recommend for cleaning the surface? I am not sure what type of wood was used for the deck.

    I do plan to use the TWP Dark Oak stain (1503) on the deck.

    Thank you.

    Does it have an old stain or just dirty?
  • We will reply to your comment shortly
    Dale Gjerning · 06/04/2015
    I have a wood deck that has not been treated for several years and is in need of a good treatment. What type of Restore application do you recommend for cleaning the surface? I am not sure what type of wood was used for the deck.

    I do plan to use the TWP Dark Oak stain (1503) on the deck.

    Thank you.
  • We will reply to your comment shortly
    TWP Stains · 06/03/2015
    Mr. X:
    I have a deck that was stained with a cedar oil based stain many years ago. I ordered the Gemini kit along with the TWP 100 cape cod gray. Can I use the Gemini kit or should I return it for the Restore-A Decj stripper and brightener? Thanks

    The Gemini Kit is not a stripper but it "may" remove a very old semi-transparent oil based stain if it has been many years. Hard to say yes or no if it will do the proper prep.
  • We will reply to your comment shortly
    Mr. X · 06/03/2015
    I have a deck that was stained with a cedar oil based stain many years ago. I ordered the Gemini kit along with the TWP 100 cape cod gray. Can I use the Gemini kit or should I return it for the Restore-A Decj stripper and brightener? Thanks
  • We will reply to your comment shortly
    TWP Stains · 06/01/2015
    joe Ricci:
    wish to order 15 gallons of two wood deck stain to use on a grey but cleaned cedar deck. Can i order in Canada

    TWP is not allowed in Canada.
  • We will reply to your comment shortly
    joe Ricci · 06/01/2015
    wish to order 15 gallons of two wood deck stain to use on a grey but cleaned cedar deck. Can i order in Canada
  • We will reply to your comment shortly
    TWP Stains · 05/28/2015
    Derek Parker:
    I found your TWP 100 product on the restore a deck website, is your Gemini cleaner and brightener and stripper the same, or better? You price on the TWP is cheaper so I was going to order from you.

    They are the same products.
  • We will reply to your comment shortly
    Derek Parker · 05/28/2015
    I found your TWP 100 product on the restore a deck website, is your Gemini cleaner and brightener and stripper the same, or better? You price on the TWP is cheaper so I was going to order from you.
  • We will reply to your comment shortly
    TWP Stains · 05/24/2015
    Bill C:
    Our deck was painted gray and we wanted to return to the natural wood look. It is now sanded down to the wood, pressure treated pine. Does it need any additional prepping? The majority of the deck is in good shape, one or two planks have some splitting that is at worst, 1/8" deep.

    Use the Gemini Restore Kit for the final prep.
  • We will reply to your comment shortly
    Bill C · 05/23/2015
    Our deck was painted gray and we wanted to return to the natural wood look. It is now sanded down to the wood, pressure treated pine. Does it need any additional prepping? The majority of the deck is in good shape, one or two planks have some splitting that is at worst, 1/8" deep.
  • We will reply to your comment shortly
    TWP Stains · 05/20/2015
    Mary Anne:
    My deck was rebuilt in 2014 using some of the railing pieces but new deck boards, so I have some old wood with very old solid stain and mostly new pretreated boards. Must I get both?

    Get both of what? Not sure what you mean.
  • We will reply to your comment shortly
    Mary Anne · 05/20/2015
    My deck was rebuilt in 2014 using some of the railing pieces but new deck boards, so I have some old wood with very old solid stain and mostly new pretreated boards. Must I get both?
  • We will reply to your comment shortly
    TWP Stains · 05/18/2015
    fencestripstaininwi:
    I have approx. 100 linear feet of pressure treated fence, about 3.5 feet high.

    Some of the vertical surfaces of the fence currently have an acrylic transparent stain (Behr transparent) that I need to remove, the longest run of fence (unsure of length) is only stained on one side.

    Would Gemini Restore Kit be suitable? If so, can you make a recommendation for the amount to strip and brighten? And then the amount of TWP stain needed?

    The Gemini Kit is not a stripper and will not remove the Behr. You will need the Restore A Deck stripper and the Brightener. Behr is not easy to remove so you may need to strip more then once to get it all off. Are you staining both sides of the fence? If so you will need roughly 6-8 gallons of stain for 2 coats. 2-3 strippers and one of the brightener. That is based on 700 sq. feet.
  • We will reply to your comment shortly
    fencestripstaininwi · 05/18/2015
    I have approx. 100 linear feet of pressure treated fence, about 3.5 feet high.

    Some of the vertical surfaces of the fence currently have an acrylic transparent stain (Behr transparent) that I need to remove, the longest run of fence (unsure of length) is only stained on one side.

    Would Gemini Restore Kit be suitable? If so, can you make a recommendation for the amount to strip and brighten? And then the amount of TWP stain needed?
  • We will reply to your comment shortly
    TWP Stains · 05/10/2015
    ewhubbard1:
    I have an approx 1200 sq ft deck to stain with twp 100 series. I also have a deck rail with spindles and small fence which would be approx 700 sq ft total if it was made of planks, not spindles. Pressure treated pine, 2 years old, never been stained. I am planning on 2 coats for the deck, 1 coat for the rail and fence. How much Gemini restore a deck and how many gallons of stain should I order?

    3 Gemini Kits and 15-20 gallons of the stain.
  • We will reply to your comment shortly
    Elizabeth Hubbard · 05/09/2015
    I have an approx 1200 sq ft deck to stain with twp 100 series. I also have a deck rail with spindles and small fence which would be approx 700 sq ft total if it was made of planks, not spindles. Pressure treated pine, 2 years old, never been stained. I am planning on 2 coats for the deck, 1 coat for the rail and fence. How much Gemini restore a deck and how many gallons of stain should I order?
  • We will reply to your comment shortly
    TWP Stains · 05/08/2015
    James Scott:
    My deck is 816 sq feet, including steps, of new wood that has been installed for 45 days. Do I need the (2) Gemini Restore-a-Deck kits? Also, I'm installing aluminum fence so it should not be an issue.

    Yes and please read this about new wood:
    http://www.twpstainhelp.com/prepping-new-wood-for-twp-stains/
  • We will reply to your comment shortly
    James Scott · 05/08/2015
    My deck is 816 sq feet, including steps, of new wood that has been installed for 45 days. Do I need the (2) Gemini Restore-a-Deck kits? Also, I'm installing aluminum fence so it should not be an issue.