Should I use spray foam insulation?

weasel1966

We own a 1930's terrace house and the roof is in a really poor state. A surveyor told me we would need it replacing but we can't afford to get it done. I saw an advert for these spray foam installers who said they could sort it out for a third of the cost. It seems too good to be true - has anyone used a similar product on their house?

Deluks · Posted: Mon Oct 19, 2009 5:05 pm Post Subject:

Replying to your topic heading, in a word - NO!

big-all · Posted: Mon Oct 19, 2009 5:16 pm Post Subject:

heeelllooo and welcome weasel1966

do a search for spray foam insulation
http://search.diynot.com/forum_search.php?all=&phrase=&any=spray+foam+insulation&not=&intitle=&stype=0&sort=score&forum_id=0&datelimit=drop&since=any&author=&search=Search+Forum

and the answer is as said above and everywhere else nooo

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big all
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IM · Posted: Fri Oct 23, 2009 1:54 pm Post Subject:

As a devotee of 'Holmes on Homes' I've always wondered about how he is so evangelical about sprayed insulation - knowing that it is, shall we say, less than popular over here.

To save those of us new to the forum from trawling back through past posts, can summarise the (alleged) pros and cons.

freddymercurystwin · Posted: Fri Oct 23, 2009 3:14 pm Post Subject:

IM wrote:

To save those of us new to the forum from trawling back through past posts, can summarise the (alleged) pros and cons.

So you want someone to spend their time retyping what has already been written countless time to save you time?

big-all · Posted: Fri Oct 23, 2009 3:30 pm Post Subject:

IM wrote:

As a devotee of 'Holmes on Homes' I've always wondered about how he is so evangelical about sprayed insulation - knowing that it is, shall we say, less than popular over here.

To save those of us new to the forum from trawling back through past posts, can summarise the (alleged) pros and cons.

just go to the link i put there and read the posts on the r/h/side and read about 6 links

job done

Quote:

disadvantages
1 foam is waterproof and dosnt breath so any leaks in the roof means the timber cannot dry out so will rot very quickly

2 roofers do not like foam as it sticks everything together adding time to a re-roofing costing you hundreds off pounds extra

3 tiles will get broken during removal adding to the replacement costs when reusing the tiles

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big all
we are------------------ all still learning

IM · Posted: Mon Oct 26, 2009 10:14 am Post Subject:

freddymercurystwin wrote:

IM wrote:

To save those of us new to the forum from trawling back through past posts, can summarise the (alleged) pros and cons.

So you want someone to spend their time retyping what has already been written countless time to save you time?

That was the idea, yeah

To be fair, the link brings up over 20,000 results

IM · Posted: Mon Oct 26, 2009 10:16 am Post Subject:

big-all wrote:

IM wrote:

As a devotee of 'Holmes on Homes' I've always wondered about how he is so evangelical about sprayed insulation - knowing that it is, shall we say, less than popular over here.

To save those of us new to the forum from trawling back through past posts, can summarise the (alleged) pros and cons.

just go to the link i put there and read the posts on the r/h/side and read about 6 links

job done

Quote:

disadvantages
1 foam is waterproof and dosnt breath so any leaks in the roof means the timber cannot dry out so will rot very quickly

2 roofers do not like foam as it sticks everything together adding time to a re-roofing costing you hundreds off pounds extra

3 tiles will get broken during removal adding to the replacement costs when reusing the tiles

Ah...

Didn't realise it was sprayed directly onto the tiles - hence gunking it into a solid mass - thought there was some kind of membrane between.

big-all · Posted: Mon Oct 26, 2009 11:40 am Post Subject:

thats normaly one off there claims
words like "stops tiles sliding" or "the tiles are firmly secured"

__________________
big all
we are------------------ all still learning

unseen · Posted: Wed Oct 28, 2009 12:49 am Post Subject:

IM wrote:

As a devotee of 'Holmes on Homes' I've always wondered about how he is so evangelical about sprayed insulation - knowing that it is, shall we say, less than popular over here.

To save those of us new to the forum from trawling back through past posts, can summarise the (alleged) pros and cons.

Also being a follower of Mike one difference to note is that canadian houses are all sheeted with plyboard before any roofing material is used (be it shingles or whatever new tech he's trying out). I would guess (my opinion here mind guys!) if we did similar before tiles or slates then yes you could spray foam. But as we don't the mess, well to a DIY'er like myself doesn't bare thinking about come getting that 1 slipped slate fixed..

Rob