Diy Wooden Fireplace . Now, lets talk about a total different approach, but so amazing! Cut the 1 x 10 board to fit the measurement between the two side pieces. Easy DIY wood mantel Remington Avenue from remingtonavenue.com Just in case the rustic wooden beam mantel is unequivocally the idea that has appealed to you the most but you need some better guidance that’s a little more specific to helping you mount such a thing on a very hard stonework fireplace, here’s an awesome tutorial from shanty. Let’s then throw in $300.00 for. Design the front of the fireplace to the desired style and color.