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They reflect the heat from radiators on external walls, reducing that lost through the wall. I think they increase efficiency about 10% and it's pretty cheap.

I was removing blown render from the garden wall and removed some pieces of brick along with it. Should these holes be repaired with mortar or anything, or should I just stuff the holes with render? The old render is practically like soil. There were plants' roots and insects crawling around in...

Okey-dokey. Thanks. I got some today :)

I want to glue some foiled polystyrene insulation panels behind the radiators. The instructions recommend a "non solvent-based adhesive suitable for polystyrene". Would PVA do the trick? If so, I can avoid buying other glues. It looks like the wall is just painted, with no wallpaper (in some...

Hi. Today, I removed some of the mortar using an angle grinder with a stone grinding wheel. I only attacked the horizontal mortar. Can you advise whether this is sufficiently deep (click to enlarge)? I could also scratch the brick surfaces with the grinder, if that might help to...

:P I figured! but I often get information from old threads so I thought the information might be useful to someone who searches and finds this thread in the future.

As I understand it, cables are supposed to be situated above insulation. Having said that, when I was in my attic, I noticed that wasn't the case. Still, it does get hot in the attic, when the sun is out, so maybe they're actually cooler where they are? According to my insulation packaging...

It wont reduce the friction?

I would like to varnish the white component of white-faced hardboard to make it smoother and more hard-wearing, preferably as cheaply as possible. Are there any restrictions to the sorts of varnishes that can be used on that surface?

Thanks, all. My drill bits are consumer-oriented Bosch bits but the plaster is new, anyway. I expected that the best compromise would be to switch on the hammer action after passing through the plaster but I wanted to check with people who knew for sure. Thanks! (I'm drilling holes for wall...

When drilling into plastered brickwork, would the hammer function of the drill lead to damage to the plaster?

:/ It's the 'cut glass to size' bit that I'm looking for information on. How do I do this safely and cheaply without chipping, scratching, breaking or otherwise damaging the glass?

This question is tangentially related to carpentry... I would like to make a picture frame and sure, I could cut the protective insert from a plastic, but what if I wanted to use glass? How do picture-frame makers cut glass to size? None of the guides I've found online go detail here, and most...

What are these dowel centres for? How are they supposed to be used?

Hey, I understand everything that you said except this; what do you mean by ruling it off and then it picking up? Thanks.

So I've got one for keeping the battens in place during the second coat, and another for removing them. If I were to keep them in place, then I suppose I would want to apply say 6 or 7 mm of scratch coat and then bring the render flush with the battens during the second coat? And then when I...

Well, to answer my own questions: a) 17 mm is a bit deep. I did manage to find some 12mm deep battens and will use those. One source says to nail the battens on which I'd have thought could damage the wall but I don't know any better so I'll follow it. The same source advised removing the...

I've got a few rendering questions pertaining to: a) battens, b) scoops and c) white deposits exuding from brickwork a) How ought I to affix the battens to the walls? Am I correct that they will be covered by the topcoat of the render and left in place? I'm unable to find 10mm thick...

In Australia and possibly elsewhere, I think there's a product called 'Render It'.

I've never rendered before and I'm just looking into it myself so that I can also render a wall but I hate to see a post go unanswered, so for now I can tell you, you'll need: hydrated lime (difficult to find in my area - one B&Q stocks it) cement (slow drying/curing) sharp sand - about...