2 phillips bit a flat pry bar wood shims and a hammer.
Large gap between cabinet and wall.
Close the gap between counter and wall if the gap between the countertop and backsplash is more than 3 8 inch it s generally too wide to fill and is best handled with trim but you can try to close the gap to give yourself the caulk option.
Also one set of open shelves by the kitchen window sits flush to the wall but the opposite set of shelves leaves a gap between the edge and wall.
Clean dust and dirt from the wall and the cabinet.
For gaps between the wall and the built in cabinet use a pin nailer with 1 inch pin nails to attach 90 degree quarter round molding.
Below i ll share photo examples and the why behind how i filled the space above cabinets in my own home.
Apply a straight line of painter s tape to the wall and the cabinet on both sides of the gap to prevent caulk getting into the woodwork and on the.
The most unsightly gap is the one between the wall and one of the end cabinets it widens to 1 2 inch at the top.