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Sealer and Primers
A lot of the problems
that do-it-yourselfers have when texturing is due to a lack of
knowledge regarding sealers. A sealer will reduce high porosity of a
surface giving you more working time of the texture material before it
starts to firm and become unworkable. Always follow the manufacturers
instructions for dilution and application but generally sealers are
ideal for Plasterboard, concrete, plaster, texture caulking and porous
paint surfaces.
An Alkali resisting primer is recommended to be used on stained,
discoloured and surfaces that subject to high temperatures such as
Chimney breasts, heated ceiling systems and behind radiators.
A stabilising solution is ideal for friable surfaces. It penetrates the
background binding any residual powdery material to produce a sound
surface. If your going to texture onto Chipboard, plywood or hardboard
it's best to use an Acrylic primer or Oil based wood primer. |
Stained Areas
Quite often you come across
ceilings, especially plastered ones, that have stains normally caused by
water leaks in the past. The trouble with these is that the stains will
seep through into your texture even after it has been painted. The best
way to cure this is to use an Alkali Resisting Primer, which is oil based,
prior to texturing
Cracks
It is very rare that you
come across ceilings that have not cracked in places over the years. These
are caused by stress on the joists or expansion and contraction to due
temperature changes. For hairline cracks you can brush in some texture
material. For larger cracks it is best to gauge along the crack with the
edge of a scraper to widen it and then tape the crack following the
procedure for taping plasterboards.
Polystyrene Tiles
Of course it goes without saying
that these have to come off but they can leave quite a mess to the surface
of your ceiling. All the residual glue or adhesive that stuck the tiles up
has to be scraped completely off. It will also be prone to staining, due
to the glue, so i suggest you give the whole area a coat of Alkali
Resisting Primer prior to texturing. |