Cavity wall insulation grant

whatsthenews

twopenny said:

Each property will be different depending on the building and the people occupying it.

I had the insulation in my last property, brick, single glazed with south facing wall but got a lot of warmth from the sun when it was out.

The wall insulation meant that it stayed warmer when the heating was on - but remained colder on days in spring and autumn when the heating was off and sun out. So I had to use the heating for longer.

Ditto the attic once insulated things stored there started to get mildew because there was no heat from the house.

More rooves have moss or lichen, the snow doesn't melt because of the insulation.

Very old buildings (17thC) with insulation I've known have condensation.

Neighbours 2000 house is dry as a bone.

So it's horses for courses.

we have new double glazed windows throughout. Front of the house (where the cold bedroom is) faces south east . The wall is absolutely freezing in the winter. I can understand what you mean about keeping the heat from bricks warming up with the sun out but think I'd rather have it insulated so it feels warmer and keeps the heat in in the winter. 
I don't store anything in attics. Its one of my rules! If it's in the attic I don't need it ha ha. 

whatsthenews

Chickereeeee said:

I had CWI  done last year. I had 'surveys' done for both government-funded installation, and privately-funded. Neither required, or mentioned trickle vents. Gaps under doors were looked at, extractor fans were asked about (not checked). I went with the privately-funded installation, for various reasons.

thank you. Interesting  

Chickereeeee

By the way, having CWI  installed, plus increasing loft insulation, seems to have reduced our annual gas usage by over 20%: difficult to be exact,  due to variable winter temperatures, etc.

(Our house is a 1920s build, with cavities that were uncapped, and actually vented via airbricks in some locations)

FreeBear

whatsthenews said:

FreeBear said:

whatsthenews said: At the very beginning there's an info video about condensation in the home . Immediately after that it asks that you agree to having trickle vents added to windows and wall extractor fans fitted in bathrooms and kitchens. It says the work is required in 95% of properties.
Not worried about the extractors as we have one in the bathroom and kitchen, however I'm not at all keen on having trickle vents added because a) they're ugly b) the windows are brand new c) the one's I've come across create a cold draught!

Part F of the building regulations requires a certain amount of background ventilation when certain thermal upgrades are carried out. Nowhere in the documents are trickle vents mandated - It even goes as far as to say alternatives are acceptable. However, certain sectors of the building industry have twisted the wording to say that you must have trickle vents. If you examine Part F closely, it says should rather than must, so not mandatory.

If you have a PIV or MHRV system, that should satisfy the background ventilation requirement.

Sorry but what's PIV please? We don't have MHRV. 
I really don't want trickle vents. Might  just see if I can find a company and get a quote.
It's only really the bedroom that as 2 outside walls that feels cold. We discovered that underneath ground to roof UPVC cladding there was no cavity just a single skin so had that made into a cavity with insulation. That was on the front between the 2 windows. Underneath the bedroom in question's window there was also UPVC cladding so we did the same there. It's the other wall that feels really cold.. Bedroom gets toasty when the heating is on but cools down much more quickly than other rooms.

PIV - Positive Input Ventilation. Basically, MHRV without the heat recovery.

Curious about the ground to roof clad wall - Conjurers up an image of cross wall construction. And if you have large poor performing windows, CWI isn't going to help much in reducing heat losses.

whatsthenews

FreeBear said:

whatsthenews said:

FreeBear said:

whatsthenews said: At the very beginning there's an info video about condensation in the home . Immediately after that it asks that you agree to having trickle vents added to windows and wall extractor fans fitted in bathrooms and kitchens. It says the work is required in 95% of properties.
Not worried about the extractors as we have one in the bathroom and kitchen, however I'm not at all keen on having trickle vents added because a) they're ugly b) the windows are brand new c) the one's I've come across create a cold draught!

Part F of the building regulations requires a certain amount of background ventilation when certain thermal upgrades are carried out. Nowhere in the documents are trickle vents mandated - It even goes as far as to say alternatives are acceptable. However, certain sectors of the building industry have twisted the wording to say that you must have trickle vents. If you examine Part F closely, it says should rather than must, so not mandatory.

If you have a PIV or MHRV system, that should satisfy the background ventilation requirement.

Sorry but what's PIV please? We don't have MHRV. 
I really don't want trickle vents. Might  just see if I can find a company and get a quote.
It's only really the bedroom that as 2 outside walls that feels cold. We discovered that underneath ground to roof UPVC cladding there was no cavity just a single skin so had that made into a cavity with insulation. That was on the front between the 2 windows. Underneath the bedroom in question's window there was also UPVC cladding so we did the same there. It's the other wall that feels really cold.. Bedroom gets toasty when the heating is on but cools down much more quickly than other rooms.

PIV - Positive Input Ventilation. Basically, MHRV without the heat recovery.

Curious about the ground to roof clad wall - Conjurers up an image of cross wall construction. And if you have large poor performing windows, CWI isn't going to help much in reducing heat losses.

All old UPVC windows have just been replaced.
Essentially on the front elevation one window went to the floor and the other smaller one  had a UPVc unit that was part glazed with bottom part UPVC filler panel and sill at the bottom sitting on the outer brickwork. 

Between the 2 windows was roof to DPC cladding which sat on the outer brickwork. It was attached to battens that were fixed into the inner brick/ blockwork .
Another large window( 2.3 m wide) at the rear had the same glazed/ UPVC filler set up as the small front window. 
Full height window to front is now only 1.3 deep with an insulated  cavity  below . 
Small front window and rear window have the same insulated cavity below. 
Kitchen and bathroom windows standard.
I guess they did it to keep costs down and originally it would have been timber.