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How to fit coving :: Posted by: Admin on February 13th, 2013

How to fit coving

In a previous post I talked about coving and cornice and the types of coving, this post deals with fitting coving.

I’m going to tell you how to fit coving based on the standard 127 mm or 90 mm concave coving, but the principle is the same for all coving / cornice.
Once you have decided on the coving you want to fix, you need to gather the tools together that you will need to fit the coving, you will need:
Caving Adhesive

  • Coving adhesive
  • A bucket to mix adhesive in
  • A bucket of clean water
  • A tape measure
  • A pencil
  • A mitre block or mitre template
  • A sponge
  • A 1 inch paint brush
  • A wide bladed scrapper
  • A hand brush
  • Safety glasses or goggles

The first job you need to do is mark the ceiling and wall so you can line the coving up to it, depending on the size of coving will determine the measurement but as a guide, concave 127 mm draw a horizontal line 83 mm down the wall and also 83 mm on the ceiling, this is where the coving will go. For 90 mm concave coving measure and draw a line 62.5 mm on the wall and ceiling. Note that there is a right and a wrong way to put up the coving, each length of coving should either have wall line or ceiling line written on it, ensure that all lengths are put up the same way with the corresponding edge on the correct surface, either wall or ceiling as labeled.

Now, put on your safety glasses. If you walls and ceiling are new plaster you will need to seal these with a diluted PVA solution where the coving is going. If the surfaces are previously painted you need to score this with the edge of the scraper, if the surfaces have been papered you need to remove this first then score the ceiling and wall. You can not put coving up over wallpaper.

Brush down the area of ceiling and wall the coving is going and ensure any loose paint is removed.
Remove excess ahesive
Now is the time to measure and cut the lengths of coving, you may need a helping hand here. Use the tape measure and measure the length of the wall the first piece of coving is going, measure from internal corner to internal corner. If the length of wall is longer than the length of coving you will have to use two lengths, more on this later. once you have done this cut one end of the coving with an internal mitre using the mitre block or ideally a template made by the manufacturer. Now measure from the tip of the cut end and mark the length of the wall onto it, now cut the other internal mitre.
Hold the length up to the wall and try it to ensure it fits, if need be you can trim the end.

Continue to measure, cut and try the remaining lengths of coving, now your ready to fix it, take a clean bucket and put a small amount of cold water into it, tip some cove adhesive into the water and mix, you are looking for a stiff creamy consistency. The adhesive is only workable for around 45 minutes so only mix enough up for you to use up, but enough for at least one length. Use the scrapper to apply the adhesive to the back of the coving, ensure you put enough on to squeeze out as you push the coving into place.

Once you have applied the adhesive to the full length of the coving and to both edges push the coving firmly into place making sure the coving is up the correct way and you follow the previously marked lines on the ceiling and wall.

As you push the coving into place, the adhesive will squeeze out, take your scrapper and remove the excess adhesive. Use clean water and sponge to wipe any adhesive off the wall and the paint brush to wash the face and edges of the coving.

As you go around the room you will have joints and corners that have gaps where the wall isn’t square or the mitre wasn’t cut exactly, use the adhesive to fill these, it can be rubbed down once dried.
Internal and external mitres

Mitre Block
Once all the coving is up allow 12-24 hours for the adhesive to set and dry before decorating.

Joints and mitres

As you go around the room you may have to join two lengths of coving together, this isn’t done by a straight joint but a mitred joint, cur the end of one length and then cut the end of the other length to allow the two to marry up and leave a seamless joint. Fix coving up and fill as required with the adhesive.

The corners should all be mitred but as most walls and ceilings are not true square you will find gaps in the corner, simply fill these with adhesive and use your scrapper and wet paint brush to fill these in. Don’t use ordinary filler as this is hard to rub down an you will damage the paper on the face of the coving. If you are using a mitre block always put the ceiling line on the bottom of the mitre block, so the coving is ‘upside down’.

Coving Stopend

Stop ends

You may come up against a situation where a door frame goes up to the ceiling, to deal with this we use a stop end, this is an external mitre cut, now use an off-cut to cut the corresponding mitre and cut square the end that fits onto the wall, this can be a tricky cut, be careful with the smaller infill part as it will break very easily. Apply adhesive and fix, fill as required.

Preformed corners

If you really are not happy trying to cut corner mitres, most manufactures make preformed corners that you can buy, fix and have a straight joint from each end. I personally don’t like these and have seen a few examples of them put up and they don’t look that good as the corner didn’t match up that well with the straight length, but it is your choice.

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Why use coving :: Posted by: Admin on January 8th, 2013

Why use coving

You may decide to fit coving to a room purely for decorative aesthetics reasons or it maybe used to cover up unsightly cracks around the wall and ceiling line. Whatever the reason the following post will help you understand about coving and its uses.

Coving or cornice?

Do you call it cornice or do you call it coving, which is correct? Well, both are correct and are the same thing, cornice is the Italian word for ledge. A cornice is described as a horizontal decorative moulding that tops a building, window or door or an internal wall. If you would like to know more about the history or more about cornice have a look at cornice on Wikipedia. Coving on the other hand is described as being used to cover transitions between surfaces, again this is a horizontal decorative moulding. Again, if you would to read more about the history or just about coving, have a look at coving on Wikipedia.

Internal and external mitres

Types of coving

Coving / cornice can be made from several types of material from lightweight polystyrene, paper faced plaster, plaster of Paris, wood, stone, concrete and even plastic. When we are talking about coving for the domestic decoration purposes in a house between the wall and ceiling these are normally made from lightweight polystyrene, paper faced plaster or plaster of Paris. These vary in weight and cost respectively.

Out of the three choices for the domestic use I prefer to use the paper faced coving. I like it’s construction and weight, I find the plaster of Paris coving to be to heavy and delicate to work with and the lightweight polystyrene too flimsy.

Coving profiles

Coving comes in many shapes, or profiles the most common being concave (a quarter-round moulding) but there are many others such as classic designs such as Egg and Dart, Swag and Bow, Rope, Swan neck, Dentil, Roman Vine, Floral, and Victorian Gothic to mention a few. You can choose a profile to suit your existing d├ęcor or simply choose one that you like the look of, at the end of the day they all do the same thing, they give you a decorative finish and to cove the transition between wall and ceiling.

Why choose coving

Many people decide to fit coving to cover the cracks around the wall and ceiling line but they also give a nice pleasing look between the wall and ceiling and takes away that hard square look you get, a nice coving be it traditional styles like egg and dart or more plain styles such as the concave will enhance any rooms appearance.

How to fit coving

This post deals with the types of coving, the difference between coving and cornice, the different profiles you can get, in the next post called how to fit coving I will give step by step instructions on how to measure, cut and fix the coving.

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