How To Hang Prepasted Wallpaper
Prepasted wallpaper types are one of the original styles of wallpaper. Commonly known as either vinyl coated or solid vinyl wallpapers, these papers are run through water using a wallpaper trough
Prepasted wallpaper requires water and a wallpaper trough for installation. This type of wallpaper has a paper backing with a glue embedded in the paper itself. Once the wallpaper is immersed into water the glue becomes active. Each individual drop is rolled up and run through water.
Preparation of the wall remains exactly the same as when hanging any wallpaper the traditional way. Preparation is the most important part that can make or break the finished job.
1. remove old wallpaper
2. walls must be clean and dry, sealed and cured
3. if necessary, prime with a pigmented sealer (Zinsser Shieldz) on very porous unpainted surfaces such as gyprock, or over old firm wallpaper that is impossible to remove.
4. cement render surfaces will require a lining paper as a base to overcome the rough texture and ensure good adhesion.
5. sandpaper, dust and apply glue size before hanging wallcoverings allowing to dry thoroughly
6. painted surfaces, in particular gloss enamel, should be washed with sugar soap and rinsed then sanded with an 80 grit sandpaper. Dust and size*
*Size can be made up by making up a weaker solution of glue (Metylan or Bartoline Powder) or it can be provided as a latex size (Superbond Latex). It is an important step in wall prep to enable adequate adhesion, ease of application and then later removal of wallpapers.
HANGING “PREPASTED” WALLPAPER
1. Fill a wallpaper trough with clean tepid water and remember to change the water about every 3 drops.
2. After cutting your first drop, roll the wallpaper back up with the pattern on the inside. Also make a mark on the top of each drop so you know the difference between the top and bottom. Immerse this drop into the trough and feed it under the wire, and agitate it so water gets to all surfaces. Let it sit in there for about 10-15secs.
3. slowly pull the drop through the wire and up from the water, let the excess water run off, and then lay it onto a plastic drop sheet. Take the top of the drop and gently fold it into the centre with pasted sides together, and take the bottom and do the same. Allow the wallpaper now to relax and (book) while you prepare the next drop. Once you have done the same with the second drop, then hang the first. By allowing the paper to relax by “booking” there is less likelihood of air bubbles remaining and seams shrinking away from each other once the wallpaper drop on the wall dries. Remember that the wallpaper will stretch while it’s wet and will contract and tighten as it dries.
4. apply the wallcovering drop onto the wall leaving approx 5cm extra on top and bottom for trimming. When positioned correctly, smooth out gently from the centre to the edges using a wallpaper laybrush or smoother, removing any air bubbles. Do not over work whilst smoothing it out. You don’t want to over stretch the paper as you may have seams visible when it dries. Ensure edges/seams are stuck firmly to the wall. Run a pasted brush down the seam if needed. Do not use a seam roller. This can damage and flatten the pattern making seams more prominent. Take care if a seam roller is needed (only for smoother patterns)
5. trim off excess wallpaper and rinse away any excess glue left on skirting boards and ceiling cornices. This can be done when the paper is drier to avoid tearing.
6. before cutting your next drop, check the pattern repeat by aligning against the drop already hung and then cutting accordingly. Some wallpapers will have no repeat, so check the label concerning the design. The pattern repeat can also be matched prior to hanging by laying drops side by side and finding the design repeat this way before hanging the first drop.
7. if any areas need to be overlapped e.g. in corners then a ready mixed border adhesive will be required to adequately secure these edges. Overlapping however is not always required and not recommended unless in an inconspicuous area e.g. behind doors or in a dark corner.
NB: PLEASE NOTE IF PROBLEMS OCCUR OR THERE IS A FAULT WITH THE WALLPAPER DESIGN, THEN DO NOT PROCEED WITH THE JOB. CONTACT YOUR RETAILER FOR FURTHER ADVICE AND INSTRUCTIONS.
LIABILITY WILL NOT EXCEED ROLL REPLACEMENT IF PROVED FAULTY. LABOUR CLAIMS WILL NOT BE ACCEPTED, AND WE HAVE NO CONTROL OVER SURFACES USED OR HANGING PROCEDURES.
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