Window Trim Before Or After Siding

On most new homes the trim goes up after the siding is installed which creates a large gap that should not be caulked.

Window trim before or after siding.

In the old days the builder would install the trim bring the siding up to it and caulk the corner. If we installed the trim after the siding we would have had to caulk a ton to fill in for the different levels the layered siding creates. Instruction on how to install exterior 2x4 trim around a new or old window. Exterior window trim on vinyl siding if your home has vinyl siding and you d like to add vinyl window trim you will first need to remove the existing siding and j channel from around the windows.

The job goes by fast and you are less tired because there is less work in installing it. The wrb is lapped over the head flashing or the flashing is taped. Before you start installing or buying anything you should always measure. That means some of the new siding could have to be removed and later reinstalled which could add to the cost.

We used pressure treated 2 x 4 s for the trim around the windows and the doorway and then we had to create trim corners for both the inside and the outside corners like the ones in the picture above. The cement board panels are fastened to the battens. We need air circulation behind these boards and the opening acts as a water exit. There is siding that simply clips into place which eliminates the stressful need to nail in every single piece.

The rain screen battens are run down to the top of the window flange. Trim boards that sit on top the siding. The head flashing is installed in a bed of caulking onto the top of the window frame. Installing vinyl siding around windows.

Just getting simple installing siding can make the job go really fast.