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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  • We will reply to your comment shortly
    Harriet · 08/04/2020
    The stain I ordered is too dark and I think we will need more than the 5 gallons because the wood is so old. So I plan to order another 5. The decks are 40-year old redwood now sanded to bare wood.
    Can I order 5 of a lighter color and mix them together? I mixed the samples to test and it looks good.
    If it is more stain than we need can we use the extra next year assuming we store it properly?
    • We will reply to your comment shortly
      TWP Stains · 08/05/2020
      Yes, you can mix colors together. See here for shelf life: https://www.twpstainhelp.com/shelf-life-of-twp/
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        Harriet · 08/05/2020
        Great. The colors I had mixed in the sample were 103 and 1504. I ordered 5 of the 1504 and assume I should get the 1503 to mix it but want to be sure that color is the same as the 103. Are they the same or should I mix 1504 with 103?
        • We will reply to your comment shortly
          TWP Stains · 08/05/2020
          The 103 and 1503 are close in color but not exactly the same. You should mix the same series together.
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    Peter · 07/30/2020
    I stained my new deck for the first time in August of 2018. It is roughly 500 square feet and I used 7 gallons. It's been two years and seems to be holding up pretty good. Should I clean it this year and apply another coat or wait another year. If I recoat it this year, should I put one or two coats on it. How much stain should I order. I used TWP 100 series in the Rustic 116 color last time.
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    Ruth · 07/17/2020
    Is the rustic stain orangey? How does the 1500 compare with the 100?
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    Don Reese · 07/16/2020
    Hi, I put in a new cedar fence a couple of months ago and am getting ready to stain and seal. The fence is 450 feet long and 6 feet high. I need to do both sides of the fence. How many gallons of TWP-100 will in need assuming a 2 coat wet on wet application?
    Thanks
    • We will reply to your comment shortly
      TWP Stains · 07/16/2020
      Fro 6750 sq feet and two coats, you will need about 50-60 gallons of stain for both sides.
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    Tracy Tarver · 07/12/2020
    How many gallons do I need to purchase for a 935 square feet deck? Do you recommend TWP100 or TWP1500 for Texas heat? Thanks.
    • We will reply to your comment shortly
      TWP Stains · 07/13/2020
      About 8-10 gallons for two coats applied wet on wet. Use the 100 Series.
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    Jason · 07/12/2020
    I should have clarified. I am looking for a varied appearance, so wondering if I can go light color on first coat followed by darker on second for a variegated look? Or vice versa. Thanks for your time.
  • We will reply to your comment shortly
    Jason · 07/12/2020
    Can I combine 2 colors into one? Say Cedar Tone and Dark Oak?
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    Ron · 07/11/2020
    Hi,

    I have a 40—year old redwood deck in a mild dry climate area of Southern California . It hasn't been protected with any finish before and (obviously) shows its age. However I plan on pulling all the boards and running them through a surface planer. I've tested a couple of boards and the boards have cleaned up very nicely - clean, smooth and very few cracks. Wood is obviously very dry, and it hasn't rained in months.

    My question is do I need any prep product if I plan on using TWP100? Also, since the wood is old and dry, may I assume that the coverage will be closer to the minimim 150sf/gallon as opposed to the 300sf/gallon max?

    Thanks

    Ron
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    Robert Schwirz · 07/05/2020
    Finally getting ready for my staining project.
    The deck is cedar and almost 2 years old now. We like the aged grey look but still like to protect the wood from the environment. I understand that I still have to clean and brighten it first. Is the TWP 100 series without pigment the best choice for the job? I like it to go back to the natural aged grey.
    The total square footage is 1210 sqft.
    Looks like 2 Restore kits and 10 gallons of stain.
    Please advise
    • We will reply to your comment shortly
      TWP Stains · 07/06/2020
      Yes, that is correct. Use the TWP Clear if you want the wood to gray naturally. The prep and stain amount is correct.
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    Karen · 06/14/2020
    Per your calculator my deck is 3734 sq ft. and I need 38 gallons thats seems like a lot, how long does it take to get more product shipped to Jefferson, GA If I only order 28 gallons.
  • We will reply to your comment shortly
    Tyler · 06/08/2020
    In the calculator my deck was 1200 sq feet and it calls for 13gal wet on wet. How much more will I need for the underside?
    • We will reply to your comment shortly
      TWP Stains · 06/08/2020
      No need to stain the underside. If you wanted to for appearance reason only, you would need as much stain.
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    Justin · 06/08/2020
    My deck was stained with TWP 101 2 years ago. Rails seem ok, but I am looking to stain the decking. Can I use the Restore Kit, just powerwash, or do I need to strip?

    Also, it sounds like 1501 offers better UV protection, which is important since my deck is full sun 75% of the time. Is 1501 noticeably different in color?
    • We will reply to your comment shortly
      TWP Stains · 06/08/2020
      The 1501 is darker, use the same 101 as before. Gemini Restore Kit for prep.
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    stacie · 06/08/2020
    My deck is very large. I bought 5 gallons and allied it. IT soaked it up very fast. I was not able to apply a second coat as I ran out of product. I am waiting

    for a stretch of good weather to reply a second coat. All recommendations for a second coat say wet on wet. Will have be able to add a second coat days after the first coat?
    • We will reply to your comment shortly
      TWP Stains · 06/08/2020
      It may not take but it really depends on who dried out the wood is. Maybe do a test board and see how it dries prior to coating all.
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    Scott · 06/02/2020
    Had an old coating of TWP 100. Power washed the deck. Anything else I should do before reapplication of the same color TWP 100?
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    Robert Schwirz · 06/01/2020
    Hi there.
    This is my deck I installed just about 2 years ago. It's cedar.
    I red about the mill glaze so I just let it sit all this time and sure enough after 6 months it started to peel and the mill glaze lifted off the wood.
    Didn't have any time to stain the deck but now I am ready for it.
    I really like the natural agent grey look and that's how it is right now. Do I still have to use the cleaner and brightener? I like to apply the clear stain without the pigments so the cedar can age and stay looking grey?
  • We will reply to your comment shortly
    byron · 06/01/2020
    i have power washed the deck and it cleaned up real well.
    is it neccessary to use any prep products and if so why?
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    MJ Little · 05/29/2020
    Why would a man advertising deck staining offer TWP 200 in Atlanta, GA area rather than the better rated TWP 100? VOC related?
    • We will reply to your comment shortly
      TWP Stains · 05/30/2020
      Maybe because he does not know better? The 200 is designed for shakes and shingles.
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    John · 05/29/2020
    1. We have a 300 sq ft pine deck which has been power washed per TWP specs.

    2. it was sealed 4 years ago with TWP 1530.

    3. At the time we purchased a 5 gallon bucket. I estimate there are approximately
    2 1/2 gallons left. The bucket has been stored in a heated basement.

    4. Should I use what’s left over or buy new.

    5. If I buy new, how many gallons should I buy for the 2 coats?

    6. The wood is quiet dry. Should I put on 3 coats.

    Thank you for your assistance.

    John
    • We will reply to your comment shortly
      TWP Stains · 05/29/2020
      It has gone bad by now. About 3 gallons for the 2 coats. Do not put on 3 coats.
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    Midge · 05/26/2020
    800 sq foot deck that is quite old but looks good. All cleaned and powerwashed.

    1. Should we use TWP 100 series?

    2. Does "CLEAR" have slight tint?

    3. How many coats to apply?

    3. How much TWP to purchase for 800 sq ft deck?

    Thanks
    • We will reply to your comment shortly
      TWP Stains · 05/26/2020
      1. 100 or 1500 based on your state laws.
      2. No. Use a tinted color.
      3. 2 coats
      4. 7-8 gallons
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    Darrell · 05/14/2020
    Just had a new rough-sawn redwood fence with rough-sawn privacy lattice but then PT Doug fir 4x4 posts installed last week in the SF Bay Area. How long should I wait before applying TWP 1500? Do I need to apply cleaner and then brightener after the weathering period even though the fence will still be "new"?