gonna be attempting a self build single storey extension very soon and have just been investigating SIPs as my block work would be very slow.
Anyone have any experience of this?
Anyone have any experience of this?
SIP extension
- Thread starter pilsbury
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Not me, no.
Very expensive!
Advantages:
Can be considerably quicker – significant if using a contractor – though not so when self-building and time/cost is potentially much cheaper/free.
Avoids the need to build a masonry inner skin – if blockwork is not your forte.
Disadvantages
More expensive than traditional timber frame
Much more thought needs to be applied early on to the finished design eg exact window sizes/door sizes and accurate site measurements must be taken to ensure it fits, the onus will be on you to supply the SIP supplier the setting out dimensions. Any errors are very expensive to put right.
May well need crane access to get them installed - £££s
SIP construction is not fool proof and their integration needs to be undertaken with a thorough understanding of how they should be built.
Need to ensure the SIPs are covered up quickly by the vapour barrier or the osb will fall apart in any rain.
You still need to build an outer masonry skin of masonry or affix a designated build-up of additional materials to support a render or brick slip outer skin.
You get some battens on OSB internally to fix wall fittings to – careful early consideration to fitting radiators or kitchen units etc needs to be undertaken.
Some future buyers will be put off and will avoid buying your house.
Does not readily lend its self to being modified or extended onto in the future.
Really SIP’s are designed for new builds when time is money and reducing the build time outweighs the additional build costs of using SIPs.
Employing a bricky would probably a better overall solution. Or even traditional timber frame.
I’m not against SIPs by any means but for a self-build extension there’s is little advantage IMO, for a new build house developer the advantages can be significant.
Can be considerably quicker – significant if using a contractor – though not so when self-building and time/cost is potentially much cheaper/free.
Avoids the need to build a masonry inner skin – if blockwork is not your forte.
Disadvantages
More expensive than traditional timber frame
Much more thought needs to be applied early on to the finished design eg exact window sizes/door sizes and accurate site measurements must be taken to ensure it fits, the onus will be on you to supply the SIP supplier the setting out dimensions. Any errors are very expensive to put right.
May well need crane access to get them installed - £££s
SIP construction is not fool proof and their integration needs to be undertaken with a thorough understanding of how they should be built.
Need to ensure the SIPs are covered up quickly by the vapour barrier or the osb will fall apart in any rain.
You still need to build an outer masonry skin of masonry or affix a designated build-up of additional materials to support a render or brick slip outer skin.
You get some battens on OSB internally to fix wall fittings to – careful early consideration to fitting radiators or kitchen units etc needs to be undertaken.
Some future buyers will be put off and will avoid buying your house.
Does not readily lend its self to being modified or extended onto in the future.
Really SIP’s are designed for new builds when time is money and reducing the build time outweighs the additional build costs of using SIPs.
Employing a bricky would probably a better overall solution. Or even traditional timber frame.
I’m not against SIPs by any means but for a self-build extension there’s is little advantage IMO, for a new build house developer the advantages can be significant.
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Many thanks for the thoughts. In addition someone else has mentioned SIPs tend to work out more expensive for the smaller building than for a larger build. Perhaps block work is the way to go.
If you want to be eating your christmas dinner in it then sips
may be the way to go.
may be the way to go.
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I have no idea if it would be easy/sensible to use these to join to a traditional-style house, but they are quick. A quick search seems to suggest that they are not (widely ) known in UK.
https://www.euromac2.com/constructi...ices/gamme-de-produits/bloc-coffrant-isolant/
https://www.euromac2.com/constructi...ices/gamme-de-produits/bloc-coffrant-isolant/
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