I don't have a big board, but what I do have an old dining room table that I made a big ironing surface out of. I covered the table first with heavy duty aluminum wrap; then put 2 layers of batting and stapled that down on the table; then I bought heavy duck fabric and stapled that down over the batting. Love it, also when the top cover became dirty due to grandkids! I just put another layer of duck fabric over that. Also, put flower pots under each leg to raise it up so my back doesn't get so tired. Sometimes on a smaller project it's so handy to be able to iron and cut on the table at the same time. My cat really likes it too!