KDAT and TWP Wait Period for New Wood in 2020

by TWP Help

Do you have to weather the wood for new KDAT Decking?

With newly installed treated lumber, it is necessary to wait an adequate period of time for the wood to season or dry out prior to staining it with TWP. New wood sometimes referred to as “green” wood, has a very high moisture content when it is new. Staining wood in this condition would trap moisture under the stain and potentially lead to mold, mildew, and wood decay issues. This can mean premature future costly repairs and replacement of the wood so it is best to wait. The seasoning time frame can be around 4-12 months give or take depending on the climate, weather and sun exposure.

To avoid having to wait months to stain your new wood you can use KDAT wood instead. KDAT (kiln dried after treatment) is wood that is dried in a kiln after it has been treated with the proper bug deterring chemicals. The wood is then put on the market and sold. It is slightly more expensive than regularly treated wood but it may be worth not having to wait as long to stain it. The wait time for staining new KDAT wood with TWP is 1-2 months. This cuts down significantly on the wait time and may be the right option for you.

After the month waiting period for KDAT wood, you should prep the wood with Gemini Restore Kit. This will clean the new wood and remove any mill glaze that occurred during the sawing of the wood at the mill. If mill glaze is left on the wood it can hinder proper penetration of the TWP stain and jeopardize its longevity and performance. Always clean and prep new wood just as you would older lumber.

Whether using KDAT or standard treated lumber, be sure the moisture content of the wood is below 15% before applying TWP stain.

Staining New Wood and Decking for the First Time

Even after the waiting period and the proper prepping, new smooth wood is still not as absorbent as it will be in a few years. We strongly suggest only applying 1 coat of the TWP Stains the first time. Do not over apply as the TWP may not penetrate into the wood correctly. Make sure to back wipe any excess stain that does not penetrate properly into the wood after 30 minutes. Use the For newer wood, TWP 100 Series if allowed in your state, otherwise use the TWP 1500 Series.

Maintaining TWP Stains

Apply a light maintenance coat to the flooring in 9-24 months. If just slightly dirty prep with soapy water to remove grime and reapply one light coat. If you wait 18-24 months make sure to prep again with the Gemini Restore A Deck. After the first year or two, your wood will be able to absorb more TWP stain which results in a longer stain life and protection!

TWP Stain Tip:

TWP is a penetrating wood preservative. It performs properly when it penetrates 100% into the wood. Over applying will not result in longer protection.

 

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Nick
Nick

New Kiln dried pressure treated pine was cleaned, dried, and stained (twp 1500) after waiting period. Issue is the deck has a lot of mildew (black splotches forming). Should I use some type of cleaner or did I do something wrong in my prep?

Jason
Jason

Purchased rough sawn cedar pickets and plan on sanding smoother with 80 or 100 grit. Can I stain immediately after sanding or does it need to weather? Which product do you recommend?

Vicki Ulrich
Vicki Ulrich

I am getting ready to stain my deck with the Cedar 1500 series on an old deck that has been cleaned. I now need to sand. I am thinking about painting a “rug” on the deck where we would have our table. Can I paint after I have stained the deck wet on wet or do I have to paint my “rug” in the space before I stain.

 
Ryan
Ryan

Staining a new all cedar hot tub. Wood is kiln dried and smooth inside and out. Given that it will be filled with water I plan on staining the outside once before the first filling as it will be at its driest. Using TWP 1501. Thoughts about wait period and direct contact with stainless steel straps that will be placed around the barrel tub?

Sandy
Sandy

South Central VA – Exterior barn doors built with kiln dried yellow pine (UNTREATED). Wood was run thru planer to remove ink stamps. Everyone around here says stain asap because the wood is not treated. What say you? Picked up 100 series brochure at paint store but I’m reading here not available in VA
What is the definition of “new wood”?
Can I stain now?
What prep?
What product?
Inside of doors will not be exposed in order to weather if there is a wait period.

Don
Don

We are in the process of installing a deck using kiln dried cedar. It will be completed mid September. Should I stain in the middle of October, or wait until spring? We live in Seattle, WA and don’t want the wood to loose it’s beauty during the winter. If we wait to stain until spring, should we somehow cover the deck to protect it?

 
John Hewitt
John Hewitt

We just had a new front door built for our 75 year-old house in Baton Rouge, LA. It is made from old growth Spanish Cedar, and appears to be very open grained. We want to finish it with natural look to show off the grain — both inside and out — before hanging it. What do you recommend?

John
John

How can I get twp100 if I live in Illinois

Linda a Fortin
Linda a Fortin

Do I need to seal bottom and sides of kdat kiln dried deck boards prior to installation and then wait 1-2 months clean and brighten top and seal

 
Wayne
Wayne

Is it necessary to stain both sides of the fence boards? Will boards cup if only one side is stained?

Wayne
Wayne

I have 2 applications

1. Fence – intending to use Kiln dried tight knot western cedar – from the article sounds like I have to wait for a month before staining. But I’m in San Francisco bay area, heading into rainy season. How long do I have to wait after a rain event to stain?

2. New Alaskan yellow cedar engineered beams holding up my deck. These have been up 3 months – are they ready to stain?

William Sherrill
William Sherrill

What is the temperature range to apply TWP 100?

 
Gail
Gail

Help! We want to stain the porch floor on our 117 yr old house. We are getting ready to have porch floor sanded to remove existing paint & we’re hoping to stain next week. We did have to replace about 20 boards & did so with Kiln dried fir on 9/18 (exactly a month ago next tues). I’ve been told by a couple of people we need to wait until spring for those new boards to weather. A couple of people said we should be ok to stain now. Reading the info. above indicates we can stain now. Torn on… Read more »

Ellyn
Ellyn

It may have been stated before, but I am in western New York State, and wonder if I need to use your prep kit on this new deck(KDAT). The deck is 5 days old. Can we stain now, or do I need to wait a full month, and then will regular washing be enough???

Ellyn
Ellyn

I thought I read that you recommended 1 coat for new KDAT pine, but in calculating amount needed you state 2 gal. for 2 coats of wet on wet? So which is best, 1 coat now, and 1 coat later(?) or 2 coats now?