External pipework from sink to external drains

Firstly I suggest you get the Kitchen Fitters to return, and complete the hin they have been paid to do, as it is there responsibility to leave a tidy job. Failing that contact Trading Standards, and put in a complaint. If all else fails, get the holes filled by a professional.

Hi, let me try and help you with this, firstly a bit of a shame that you have been left with this problem. I am a very traditional builder so not too keen on all modern quick fix DIY solutions, however in this case I would recommend expanding foam, available from most builders merchants and DIY stores. Please note this does come with a word of caution, this can be very very messy and will stick to anything it touches. The positive is that it will expand and completely wrap itself around your waste pipe and fill any surrounding holes in the external wall. Guaranteed to keep bugs and insects out. Please ensure if you use this that you put newspaper anywhere close to where you are using it to catch all material that may drop from the nozzle. Please also read the manufacturers instruction on the tin. If done carefully this can be a neat solution once excess material is cut away. Before you do this I would stuff a little newspaper around the pipe to about an inch deep on the outside of the wall to stop any material getting on the outside and damaging the face of the wall. Once it is dry remove the newspaper and fill the gap left with a sand and cement mortar to match the wall face outside. Best of luck IPS

Hi. You can use expanding foam or sand and cement mix. However for a more attractive finish you could use a new product called pipe snug, available from Screwfix for around £5.

You could use expanding foam Then trim back a little on the outside and dress with sand and cement Or just use sand and cement as I don’t think your drain will expand and contract If so then go around any small gap with clear silicone

A standard mortar mix will fill those holes with minimum effort. You can pick up a tub for around £10 from your local DIY center. Simply add water and apply with a pointing trowl.

Get some expanding foam filler from B&Q or Wickes. It costs approximately £7. Just spray some foam into the holes and around the pipes. Wait a day to let it dry out and then, using a sharp knife, cut away the excess. To finish off just sandpaper and a bit of paint....Job done.

Hello I would suggest expanding foam, just spray it in the hole and as the name suggests it will expand inside and go hard to stop any cold winds or bugs coming in. Should be able to get from any supplier

Cement should be used to fill out the hole on the outside, and on the inside you could use silicone.

Hi Phia, Probably the most easiest and cheapest solution to this for you would be a just add water mortar mix, you should be able to make quite a stiff mix to point and make good the holes, the good thing about using a mortar mix is you’ll be able to paint it if needed once dry, with expanding foam you won’t be able to paint very well and it will discolour. Hopefully this will help.

Hi firstly the trade should of filled the holes if they are not in use as this is part of there job , i would refill the holes with expanding foam so it seals all the joint ,then cut it off and cement the face of the brick etc

Without seeing the magnitude of the gap around the pipes it is difficult to assess. However, to permit thermal expansion and contraction, I would recommend fire proof expanding foam left to cure and trimmed to facilitate sealing externally with all weather sealant.

Hi, expanding foam is something that I use to fill gaps. Once set, trim off the excess and either plaster/poly-fill over (inside) and for the outside bit of mortar should do the trick