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We got our deck sanded and stained with the intergrain ultradeck spotted gum timber oil, but we noticed there are patches of lighter shades as shown in the picture
The painter told us that probably a darker shade of oil was used the first time the deck was oiled and when he sanded the deck this time, paint at some parts got removed exposing the bare timber.. and when he applied the lighter timber oil, it caused the variation in colours
Can I get some advice on how this can be fixed.. ?? All possible options / solutions are welcome
Hello @AarKay
I suspect that the surface of the decking panel was not sanded thoroughly. This is the only reason I can think of that will cause the stain to peel off. Putting on a second coat will not help as the wood can't absorb the stain into its fibres as the old stain is still present acting like a seal. I suggest using a For Hire: Orbital Floor Sander - 24hr to sand the surface of your deck back to timber.
Here is a link to our best advice: How do you revive a deck?
Here are some handy step-by-step guides:
I also suggest having a look at these projects by Bunnings Workshop community members:
- Starting again with the deck - sand and strip by @Baz
- Deck renewal using floor sander by @Jason
- Deck strip, sand and oil by @DIY_Dan.
If you need further assistance, please let us know.
Eric
Hi @EricL ,
thanks for your response. I have a few follow up questions
- the guy who did the decking used the following sander I think with 120 grit sanding paper.. after the sanding the parts that had more wear n tear probably stripped down to its bare timber, and only those spots had lighter shade (even after 2 new coats).. so the stain dint really peel after applying the coats, they stripped down during the sanding.
- now he did apply an extra coat in those areas like I mentioned above, however the colour was always lighter than the rest of the deck.. so is his reasoning that there’s probably a darker shade applied earlier on rest of the deck correct ? By his reasoning the lighter shade parts in the picture is the true colour of Intergrain Spotted Gum Ultradeck timber oil.. which doesn’t seem right
- going forward I guess the only option like you mentioned is to sand the whole thing down to bare timber with 40 and 80 grit.. and then applying fresh oil throughout.. how often is it recommended to strip down to bare timber in order to oil (once in 2-3 years) ? Considering we plan to atleast reapply the coats every 1 year ?
Hi @AarKay,
As Eric mentioned, the previous coating on the deck was heavily deteriorated and only partially sanded. The lighter areas were the more deteriorated sections, and sanding removed them, exposing the underlying timber. Once a deck coating becomes this deteriorated where it is coming off in some sections and not others, affecting the colour, you really need to sand the entire coating off and start again. So, before your new coat was applied, it would have been Intergrains advice to sand all the previous coating off to bare timber and not just spot sand.
It's this spot sanding that has caused the inconsistencies in the coating colour. I would suggest speaking with the painter and asking them whether the correct preparation steps for the product were followed.
Paints, varnishes or coatings in varied condition:
Paints, varnishes or coatings that have deteriorated unevenly, remove all existing coating by using a coatings stripper or sanding back to bare timber. Then clean with Intergrain UltraPrep Timber Cleaner.
Stripping down to bare timber is only required if the coating has deteriorated significantly. If not, you can apply yearly maintenance coats.
Please let me know if you have any questions.
Mitchell
