How is your contract worded? You may be better served by asking a local lawyer.

Highly doubtful. Your contractor may look at it as the homeowner’s DIY efforts interfering with the scheduling of his trades.

Sounds like you need a sit-down discussion with your contractor. If that doesn't work, perhaps you need a sit-down meeting with your attorney.

Not without your contractor agreeing to it beforehand.

Similar question here: Similar thread

Know what your contract has in it, you may be violating your own contract and voiding warrantees. Work things out with your builder unless you have a close personal friend that is an attorney that is going to take you on his next vacation, that you fund.

I was just wondering. Thought not, but will subtract supplies that he should have paid for. I also plan on getting subcontractor lien releases and one from the builder too before I make our final payment . I no longer trust this contractor. He is like the bad ones you read about on the Internet. Very disappointed, just want our house done so we can move in.

but will subtract supplies that he should have paid for

Again ... get this agreed to and in writing before you do it. You can't just violate your contract as you see fit.

We have communicated with him about these things. We haven’t done anything that violates our contract. He’s the one who is not doing what is in it!

When you look down the tracks, do you see a really big train coming?? I think everyone else here does.

I understand!

I use a standard contract form that allows an owner to perform the work if the GC fails to perform it for a certain amount of time. I doubt that clause is in your contract.

I always think it’s worthwhile to try and reach an amicable resolution without lawyers, if possible. We’re not cheap, and whether your attorney’s fees are recoverable would likely be determined by the contract language. I would also ignore the oversimplified (and largely inaccurate) discussion of contract law in the comment above; to the extent you do want to understand your legal and contractual rights, talk to an actual lawyer in your jurisdiction and have the contract language ready.