How to Wallpaper2

Step 11 – Position the Paper on the Wall

When the paper is in position for hanging, unfold the top half of the pasted sheet. Overlap the top edge of the pasted paper at the top by about 2 inches. You'll cut away this overlap in the trimming process.

Hold the edge of the paper with one hand and pull the pasted fold apart. The pasted side of the paper should be held firmly against the wall. Reposition the strip as necessary so that the right edge of the paper lines up with the pencil line you made previously.

Step 12 - Smoothing

Use a smoothing brush to smooth out the top and bottom. Allow the bottom of the paper to fall of its own weight. Brush it out evenly. If you trap some air behind the paper, smooth it out with the brush. If this does not work, pull the paper away from the wall.

Continue to apply each sheet of paper in this same manner. Use care to align the design in each succeeding sheet.

Step 13 - Trimming

Trim off the surplus paper at the bottom and top of each strip. Use a metal paint edger or broad knife and a razor knife to get a clean edge. Change the blade on your knife every strip for better results.

Step 14 – Wash Away Excess Paste

Use clean water to rinse all baseboards, casings, etc., with a damp sponge before the paste dries.

Step 15 – Wallpaper Rolling

Let the paper dry about 15 or 20 minutes, then roll all seams. Use a regular wallpaper roller and roll thoroughly for a neat job. Do not apply too much pressure; you may form paste ridges under the paper or force the paste out through the seam.

Step 16 – Do Your Corners

At the corners, measure from the last full strip of wallpaper to the corner and add 1/2 inch. This 1/2 inch will allow the strip to go into the corner and onto the adjoining wall by 1/2 inch. If your walls are not running straight up and down, you may want to use 1 inch instead of 1/2 inch.

A small slit at the top and bottom of the piece in the corner will make it easier to go around the corner.

For the next piece, measure out the width of the wallpaper from the corner and make a pencil mark. Use your level and make another perfectly straight line from the floor to ceiling as before. This piece will overlap the 1/2 inch strip on the wall from the previous piece installed. For vinyl wallpaper, use a vinyl-to-vinyl adhesive on these corner seams.

Odd and Ends

Be especially careful when trimming paper along the edges around fireplaces, windows, mantelpieces, etc. Sometimes the weight of the paper causes it to tear at its narrowest point.

For outside corners, measure the distance from the last full strip to the corner. Add 1 inch to this measurement. Measure the width of the paper and add 1/2 inch. Measure out from the corner the width of the paper and add 1/2 inch. Make a pencil mark on the wall. Using your level, again draw a light pencil line from the floor to the ceiling. Align your wallpaper with this line and match the pattern as closely as possible. This piece will overlap the last piece by 1/2 inch.

For doors and windows, hang the paper over the edge. Using your razor knife cut away the excess wallpaper. Making small cuts from the corners of the doors and windows toward the center will help you position the wallpaper around these obstacles. After the paper is smoothed, use your edger and razor knife to trim around the doors and windows.

Since all the switch-plates, outlet plates, etc. were removed before papering, you can apply the wallpaper right over these openings. The wallpaper can then be cut with the razor knife and straightedge. Replace the fixture plates for a finished job.

selected from: https://www.doityourself.com/stry/h2wallpaper