This calculator will help you determine the proper amount of stain and prepping supplies needed to refinish your deck using TWP 100 or TWP 1500 Series.

 

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

 

You will get two prepping results. You need one, not both options:

  • First will offer the Gemini Restore Kit. This will be used for new, gray, dirty decks and for applying TWP over an intact older coating of TWP.
  • Second is the 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.

 

If you have questions as to which to use, please ask below.

 

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    Eddie Eastwood · 06/15/2019
    I power washed and sealed my dock over the winter with Rain Guard, something I bought at Orchard Hardware before they closed. It's water based similar to Thompsons. Can I just powerwash to clean the dock or do I need strip and brighten before applying TWP?
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      TWP Stains · 06/16/2019
      You will need to stip and brighten for prep.
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    Cindy Williams · 06/12/2019
    We have aluminum balusters so we only need to Stan the top and bottom of the railing and the posts. Our deck is 700 square feet and has one step . This is the first time so we are only doing one coat . Will 5 gallons be enough?
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      TWP Stains · 06/13/2019
      Does the 700 account for the railings, sides of the deck, and the stairs?
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    Ginny Freudenberger · 05/31/2019
    The "calculator is for deck measurement. Do you have calculator for house measurement.??
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      TWP Stains · 05/31/2019
      Just do length x height for each side of the house.
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    Jim · 05/26/2019
    Have a new 12&18 pergola not sure how much I would need?
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    DeWayne · 05/06/2019
    I'm in Northern New Mexico, and built a new privacy fence last year, so it has been up for a little over a year. I would like to treat it with your product, what do you suggest and what is the time frame I can figure on receiving the product. I have about 104' of fence at a little over 6' high?
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    Kathy · 04/29/2019
    We put one coat of dark oak 103 on our deck floor this week. we think a second coat would give it a richer look, is that okay to do? We live in Charleston SC
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      TWP Stains · 04/29/2019
      As long as the wood is still absorbent than it should be okay. One very light coat.
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        Kathy · 04/29/2019
        thank you for your quick response - I'll post pics once we are done with the project! Love the product
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    Jack R · 04/26/2019
    If I have 750 sq ft of decking, do I add in an additional 375 sq feet for the wet on wet application? Actually, what I need to know is how much TWP 100 series I need to purchase for Houston, TX after stripping and brightening.
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      TWP Stains · 04/27/2019
      The calculator tells you how much to use when you input your numbers for two coats applied wet on wet. 7-8 gallons.
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    dan · 04/23/2019
    I have a cedar fence that is one year old. I have never stained or sealed it before. What stain do you recommend if i'm looking for the color of the cedar to be the same as if it's "wet"?
    • We will reply to your comment shortly
      TWP Stains · 04/23/2019
      Look at Honeytone in the 100 or 1500 Series.
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    Dan · 04/23/2019
    Does your calculator account for 2 sides of a fence or do i need to double it?
    • We will reply to your comment shortly
      TWP Stains · 04/23/2019
      This a deck calculator, not for fences. Fence math is very easy. Length x Height x 2 for both sides. Divide that by 100 and you will get the gallons needed for 2 coats applied wet on wet to both sides of the fence.
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    Michael · 03/30/2019
    Please define "wet on wet" Thanks...Michael
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    Andrew · 03/24/2019
    Last year I stained my deck with the 1503 Dark Oak (love it). This year I plan on staining my fence, also with the Dark Oak. It is a 6' pine fence that is exactly one-year old. The fence is 250' long, so I will need to cover 3000 sq ft (250*2*6). I know the stain covers approximately 150-300 sq ft / gallon, but should I expect to be on the low or high end of that given that it's a one-year old pine fence that has never been stained? Also, I'm hoping that, again because of it's age, I can just lightly pressure wash and then stain without needing any type of pre-treatment. Is that correct? Thanks!
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      TWP Stains · 03/25/2019
      For two coats applied wet on wet, you will need about 25-30 gallons for 3000 sq feet. You will need to prep with the Gemini Restore Kit: https://www.twpstain.com/gemini-s-restore-a-deck-cleaner-and-brightener-kit

      You cannot just lightly prep. You have to remove mill glaze and oxidation.
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        Andrew · 03/31/2019
        Thanks for the reply. Given the amount of stain required and the need for 3000 sq ft worth of prep kit, I'm thinking I'd like to put this off for another year so I'm better prepared for the cost. Would one more year of unprotected exposure (I live in Central Ohio) be so terrible? That is, would I do any damage or somehow make the job even harder more expensive by waiting an additional year? Thanks again!
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          TWP Stains · 03/31/2019
          It will not harm the wood but it will make it harder to prep. More oxidation/graying to remove.
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            Andrew · 04/01/2019
            One last question...would there be any downside to prep/staining the outside of the fence this year, and then doing the inside of fence next year? Would this lead to any strange aging effect (like warping)?
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              TWP Stains · 04/01/2019
              We would not suggest that. You will have issues with drips on the opposite side.
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    Chris · 03/24/2019
    I like a medium golden oak. Can your dark oak be mixed with natural in the 1500 series? Or do you know a better combination and what ratio? Also can this stain be applied with a lambs wool pad?ThankYou
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      TWP Stains · 03/24/2019
      You can mix TWP colors of the same series but you will have to test the ratios on your end. No, on the lambswool applicator.
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    mike · 02/19/2019
    Can I use a roller with TWP 100? Can it be sprayed using air sprayer, hand sprayer?
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      TWP Stains · 02/20/2019
      TWP is best applied with a stain brush or a stain pad. It can be sprayed as well with an airless or pump sprayer.
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    richard · 01/16/2019
    Can any of your solid stains be used in a sprayer or must they be painted or rolled?
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    Tom Sintzel · 09/19/2018
    I'm redoing my decks. I originally put down Behr solid color all-in-one stain sealer. It pealed after a few years I have two decks 13 x 18 and 30 steps.


    I had used a large floor sander and some boards are very difficult to get the remaining stain off. It very hard to remove using a hand powered belt sander. Any suggestions such as power washing to remove or use the stripper to remove the remaining remnants of stain. Then re-sand. I haven't started sanding the decks since I will need to use the power sander 60=80 grit hoping to find a better anwer to removal. I read on your website that your stripper will not remove solid stain.


    Most of the saned deck that is seen in the picture will take water and not bubble, but some boards have left over stain and water will bead up so the deck is not ready to finish.


    Also, I have 275 wooden spindles and I can't sand each one. Should i use a solid stain on the deck and match the spindles. would semi look good on the floor and solid on spindles.
    • We will reply to your comment shortly
      TWP Stains · 09/19/2018
      The only way to remove the solid stain is to continue to power sand. A stripper will not work. If you want to do a two toned deck then use a solid stain for the railings and the TWP for the floors once you have 100% sanded off the solid stain that is currently there.
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    Nick · 09/12/2018
    I have a red cedar fence that was installed in Missouri in October 2017. It is a total of 293 feet, is 4 feet high, and has 2 inches between pickets. How much stain do I need to do both sides of the fence?

    Thanks.
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      TWP Stains · 09/12/2018
      20-25 gallons to do both sides. Sq footage is about 2400 sq feet for all.
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    Robert Schwirz · 09/11/2018
    Just got a 800 sq ft cedar deck installed about 2 months ago. The color of the cedar has changed a little already. Do I have to wait longer to apply the 101 stain and do I need to use a cleaner first?
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    KAREN · 08/30/2018
    How long after using Gemini Restore-A-Deck, can TWP 100 stain be applied?
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    Linda · 08/29/2018
    I have 289' of 6' privacy fence that was installed 10 months ago. The wood has a rough finish. I was looking at using the 1500 stain. Do I need to clean with the brightener first or can I just go with the bleach and water as per the instructions on the data sheet for the 1500? Also, is it required that 2 coats be used? Since the wood is rough I think that an airless sprayer might be the easiest and best way to go- any thoughts? How much stain should I purchase (289x6x2= 3468') to do both side of the fence? Thank you, Linda
    • We will reply to your comment shortly
      TWP Stains · 08/29/2018
      Best to use the Gemini Restore Kit for the prep. 2 coats wet on wet will be needed. Spray on your first coat and back brush your second coat to ensure an even application with no drips. About 30-35 gallons for the two coats applied wet on wet.
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    Gail · 08/02/2018
    Our deck is 1400 sq ft. We will be using the TWP 1500 stain in Dark Oak.

    The deck is 20 yrs. old and has never been stained.

    We have power washed and jomaxed it,

    will follow through with deck brightener,

    is this the correct procedure?

    On your TWP stain info is says 150-200 sq ft per gallon.

    When we click on the Product Data link it says 300-400 sq ft per gallon.

    Which coverage amount should we use, how many gallons do you suggest for the 2 coats wet on wet?

    Thank You,

    Gail
    • We will reply to your comment shortly
      TWP Stains · 08/02/2018
      Yes, the prep sounds good. For 1400 Sq feet and the two coats applied wet on wet. You will need about 13-15 gallons.