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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Cavity wall insulation
Local Council ad in the paper for energy efficiency, so I'm wondering
about cavity wall insulation, will it leave the outside of the house peppered with dots !!, what size hole for injection and at what intervals? And are the savings worth it? Cheers, |
#2
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Cavity wall insulation
Staffbull wrote:
Local Council ad in the paper for energy efficiency, so I'm wondering about cavity wall insulation, will it leave the outside of the house peppered with dots !!, what size hole for injection and at what intervals? It depends on the contractor and what sort but the savings far outweigh the aesthetic drawbacks. And are the savings worth it? Undoubtedly. Peter Crosland |
#3
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Cavity wall insulation
"Staffbull" wrote in message ups.com... Local Council ad in the paper for energy efficiency, so I'm wondering about cavity wall insulation, will it leave the outside of the house peppered with dots !!, Not so you'd notice! And are the savings worth it? The comfort is, the savings probably are too. Mary |
#4
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Cavity wall insulation
"Staffbull" wrote in message ups.com... Local Council ad in the paper for energy efficiency, so I'm wondering about cavity wall insulation, will it leave the outside of the house peppered with dots !!, what size hole for injection and at what intervals? And are the savings worth it? Cheers, Just make sure you do not have a garage on the side of your house or it will cost you about £600. Ron |
#5
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Cavity wall insulation
Owain wrote:
Mary Fisher wrote: will it leave the outside of the house peppered with dots !!, Not so you'd notice! It depends rather on the wall finish and the care and skill of the contractor. The flats opposite me have a rendered finish and the infill dots are noticeable, but not terribly intrusive. In a brick wall with regular mortar lines and a variation in brick colour making matching the colour more difficult, the holes would be much more noticeable. Probably still worth doing though, for economy and comfort, and the added value of the insulation to the house price would more than offset the slight detraction in exterior appearance (unless, of course, the house is particularly delightful to start with). I think I'd have the contractor start at the back until I saw how well he was filling the holes. If you care enough, you could scoop the last 1cm out of the hole before it set, and then contrive a matching solution. |
#6
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Cavity wall insulation
"Staffbull" wrote in message
ups.com... Local Council ad in the paper for energy efficiency, so I'm wondering about cavity wall insulation, will it leave the outside of the house peppered with dots !!, what size hole for injection and at what intervals? And are the savings worth it? Cheers, Usually 12mm diameter holes, roughly at one metre intervals vertically and horizontally, usually through the mortar between bricks, unless rendered in which case they just drill through. Typical heat loss is 30% through uninsulated cavity walls, so your house will immediately feel warmer. Also, in older houses with suspended wooden floors, under-floor draughts and draughts through upstairs floors are often reduced. |
#7
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Cavity wall insulation
On Oct 25, 11:11 pm, "Ron" wrote: "Staffbull" wrote in oglegroups.com... Local Council ad in the paper for energy efficiency, so I'm wondering about cavity wall insulation, will it leave the outside of the house peppered with dots !!, what size hole for injection and at what intervals? And are the savings worth it? Cheers,Just make sure you do not have a garage on the side of your house or it will cost you about £600. Ron We got quoted £494 yesterday for a 3 bed detached with single storey extension. Last February a 3 bed without extension cost £160. Both from the same company. Inflation seems to have the roof in Dorset |
#8
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Cavity wall insulation
"Owain" wrote in message ... Mary Fisher wrote: will it leave the outside of the house peppered with dots !!, Not so you'd notice! It depends rather on the wall finish and the care and skill of the contractor. The flats opposite me have a rendered finish and the infill dots are noticeable, but not terribly intrusive. In a brick wall with regular mortar lines and a variation in brick colour making matching the colour more difficult, the holes would be much more noticeable. When we had ours done I asked them to fill the holes with a matching 'mortar' (the original was red, we pointed with mastic sand when we moved in). They said that they couldn't so they knocked quite a sum off the bill so that we could do it ourselves. We never got round to it and the other week I was looking for the holes - which they filled with ordinary mortar. It took a long time to find them - to my surprise. Probably still worth doing though, for economy and comfort, and the added value of the insulation to the house price would more than offset the slight detraction in exterior appearance (unless, of course, the house is particularly delightful to start with). Oh absolutely, I couldn't agree more. the visual impact is very small and could be resolved if it were thought necessary. Mary |
#9
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Cavity wall insulation
Owain wrote: Mary Fisher wrote: will it leave the outside of the house peppered with dots !!, Not so you'd notice! It depends rather on the wall finish and the care and skill of the contractor. The flats opposite me have a rendered finish and the infill dots are noticeable, but not terribly intrusive. In a brick wall with regular mortar lines and a variation in brick colour making matching the colour more difficult, the holes would be much more noticeable. Probably still worth doing though, for economy and comfort, and the added value of the insulation to the house price would more than offset the slight detraction in exterior appearance (unless, of course, the house is particularly delightful to start with). I think I'd have the contractor start at the back until I saw how well he was filling the holes. Owain Thats where It'd be tricky, its a double fronted house. It's dashed in white and black stone, the extension has been done in the same and the match is so so. I'm afraid of having it look like a Dalmation !!! :-) |
#10
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Cavity wall insulation
On Thu, 26 Oct 2006 06:17:44 +0100 someone who may be "Codswallop"
wrote this:- Usually 12mm diameter holes, roughly at one metre intervals vertically and horizontally, usually through the mortar between bricks, unless rendered in which case they just drill through. Typical heat loss is 30% through uninsulated cavity walls, so your house will immediately feel warmer. It will also be cooler in summer, as less heat will be conducted in through the walls. -- David Hansen, Edinburgh I will *always* explain revoked encryption keys, unless RIP prevents me http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54 |
#11
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we used to use various coloured powders/dyes to mix with the cement or in your case from what i can remember i would mix white paint with the cement and pick the stones up that were knocked out by the drilling and stick them in the wet cement. hope this is of some help, pitbull |
#12
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Cavity wall insulation
David Hansen wrote: On Thu, 26 Oct 2006 06:17:44 +0100 someone who may be "Codswallop" wrote this:- Usually 12mm diameter holes, roughly at one metre intervals vertically and horizontally, usually through the mortar between bricks, unless rendered in which case they just drill through. Typical heat loss is 30% through uninsulated cavity walls, so your house will immediately feel warmer. It will also be cooler in summer, as less heat will be conducted in through the walls. -- David Hansen, Edinburgh I will *always* explain revoked encryption keys, unless RIP prevents me http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54 Phoned them today, grant forms in the post, I can get £2000's worth done for nowt as I'm unemployed at the mo, make hay while the sun shines and all that !!! |
#13
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Cavity wall insulation
pitbull wrote: Staffbull Wrote: Local Council ad in the paper for energy efficiency, so I'm wondering about cavity wall insulation, will it leave the outside of the house peppered with dots !!, what size hole for injection and at what intervals? And are the savings worth it? Cheers, i used to do this for a living (about 20 years ago) and we used to pride ourselves on trying to leave no trace of any drilling. it's probably almost impossible to completely disguise the holes but any decent company should be trying to be better at it than their competitor's. we used to use various coloured powders/dyes to mix with the cement or in your case from what i can remember i would mix white paint with the cement and pick the stones up that were knocked out by the drilling and stick them in the wet cement. hope this is of some help, pitbull -- pitbull I've decided to get it done, as the asthetics come second to keeping the house warm cheaper, but thanks for the pointers on minimising the visual impact :-) |
#14
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Cavity wall insulation
Staffbull wrote:
Owain wrote: Mary Fisher wrote: will it leave the outside of the house peppered with dots !!, Not so you'd notice! It depends rather on the wall finish and the care and skill of the contractor. The flats opposite me have a rendered finish and the infill dots are noticeable, but not terribly intrusive. In a brick wall with regular mortar lines and a variation in brick colour making matching the colour more difficult, the holes would be much more noticeable. Probably still worth doing though, for economy and comfort, and the added value of the insulation to the house price would more than offset the slight detraction in exterior appearance (unless, of course, the house is particularly delightful to start with). I think I'd have the contractor start at the back until I saw how well he was filling the holes. Owain Thats where It'd be tricky, its a double fronted house. It's dashed in white and black stone, the extension has been done in the same and the match is so so. I'm afraid of having it look like a Dalmation !!! :-) When we did houses with a whiteish render, we pointed the holes up[1] with tyrolean which dries almost brilliant white, occasionally we would do a yellow, blue, pink or whatever colour and I never did one that I had to touch up th holes afterwards with paint, we also carried 6 or 7 colours of mortar dye, red, buff(yellow) black, brown, green and blue...with these we could make a mix suitable for any house. We wore 'marigold' type rubber gloves and pointed each hole up with a 'sausage' of mortar pushed deep into the hole and smoothed with the fingers, some firms (not naming names here) would use a trowel but the problem with this was that they only got a quarter inch of mortar over the end, after a year or two it had washed away. The repointing is done as each hole is finished. |
#15
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Cavity wall insulation
On 26 Oct 2006 09:22:58 -0700 someone who may be "Staffbull"
wrote this:- Phoned them today, grant forms in the post, I can get £2000's worth done for nowt as I'm unemployed at the mo, make hay while the sun shines and all that !!! Get the loft done as well, if it isn't already. Cavity wall and loft insulation will ISTR reduce heat losses by something like 60%. They should also do draught proofing. Also insulate heating pipes, hot water pipes and a badly lagged hot water cylinder. -- David Hansen, Edinburgh I will *always* explain revoked encryption keys, unless RIP prevents me http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54 |
#16
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Cavity wall insulation
David Hansen wrote: On 26 Oct 2006 09:22:58 -0700 someone who may be "Staffbull" wrote this:- Phoned them today, grant forms in the post, I can get £2000's worth done for nowt as I'm unemployed at the mo, make hay while the sun shines and all that !!! Get the loft done as well, if it isn't already. Cavity wall and loft insulation will ISTR reduce heat losses by something like 60%. They should also do draught proofing. Also insulate heating pipes, hot water pipes and a badly lagged hot water cylinder. -- David Hansen, Edinburgh I will *always* explain revoked encryption keys, unless RIP prevents me http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54 the loft's done but only about 100mm so plenty of room for more :-) |
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