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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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Sealing holes through walls for wires
I'm knocking holes through walls to put wires through,
mains electric and ethernet. I've been concreting in offcuts of round plastic drainpipe. How would I seal these against smoke and fire? Is there a better way to do it? Someone said using metal would cause induction. [g] |
#2
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Sealing holes through walls for wires
george [dicegeorge] wrote:
I'm knocking holes through walls to put wires through, mains electric and ethernet. I've been concreting in offcuts of round plastic drainpipe. How would I seal these against smoke and fire? Is there a better way to do it? Someone said using metal would cause induction. Only if you have a brain te size of a peanut encased in a tinfoil hat. Where IS dennis today? [g] |
#3
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Sealing holes through walls for wires
george [dicegeorge] wrote:
I'm knocking holes through walls to put wires through, mains electric and ethernet. I've been concreting in offcuts of round plastic drainpipe. How would I seal these against smoke and fire? Is there a better way to do it? Someone said using metal would cause induction. [g] Keywords: intumescent, fireproof, silicone, firestop, foam, penetration. e.g. http://www.screwfix.com/prods/56102/ |
#4
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Sealing holes through walls for wires
On 14 Sep, 16:14, "george [dicegeorge]"
wrote: I'm knocking holes through walls to put wires through, mains electric and ethernet. I've been concreting in offcuts of round plastic drainpipe. How would I seal these against smoke and fire? Is there a better way to do it? Someone said using metal would cause induction. [g] If you don't need to get them out just plaster/cement up. If you do, use intumescent seal. Comes in the same tubes as silicon sealant. Expands when heated. |
#5
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Sealing holes through walls for wires
On 14 Sep, 16:14, "george [dicegeorge]"
wrote: I've been concreting in offcuts of round plastic drainpipe. How would I seal these against smoke and fire? You may not need to. Per the regulations, a conduit up to 32mm diameter is acceptable without. Above that, you need a barrier that achieves the same degree of fire protection as the wall already achieved. This doesn't mean the same construction, merely that if the wall was already required to have 1/2 hour resistance, the duct should do so too. You probably need a draught barrier anyway. Is there a better way to do it? An intumescent barrier is one that's not necessarily a barrier when cold, but will expand to form one during the heat of a fire. Intumescent mastics (Screwfix etc., cheap) are convenient for small ducts, especially if the cabling is permanent. For large ducts, pre- made collares are usually used, but these can get expensive. A cheap and simple barrier that's useful when cables might come and go is just to use a lid of plasterboard or Viroc Versapanel, according to the usual fire regs. This can be split around the cables. |
#6
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Sealing holes through walls for wires
"george [dicegeorge]" wrote in message ... I'm knocking holes through walls to put wires through, mains electric and ethernet. I've been concreting in offcuts of round plastic drainpipe. How would I seal these against smoke and fire? Is there a better way to do it? Someone said using metal would cause induction. How much of a seal do you need? These no good? http://www.wickes.co.uk/Single-Gang-...te/invt/204733 http://www.wickes.co.uk/Double-Gang-...te/invt/204734 |
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