Month: May 2015

Should I replace my boiler?

18 05/15
Should I replace my boiler at the same time as insulating my external walls?

Should I replace my boiler at the same time as insulating my external walls?

Exter­nal solid wall insu­la­tion is a big addi­tion to the fab­ric of your home, so it is worth think­ing – what else should I be doing at the same time to make sure I am get­ting value for money on my instal­la­tion? One pos­si­ble answer might well be to con­sider installing a new boiler!


As you may be aware, a typ­i­cal boiler will have a lit­tle round vent com­ing out of your wall to allow the waste gasses to escape the room. The flue usu­ally sticks out from the wall, and you will often see on a chilly day the steam ris­ing from the side of the house.

In most cases exter­nal solid wall insu­la­tion pro­trudes from the exist­ing wall by 100mm (although this might vary between sup­pli­ers). When you install exter­nal insu­la­tion, as you might expect, you can’t just bury the flue in the insu­la­tion, it needs to be extended out with a flue exten­sion kit that exactly matches the cur­rent model of boiler. This typ­i­cally adds around £200 to the cost of the works.

If you need a new boiler at the same time – you can avoid that extra cost, because the new boiler can have a longer flue installed at the same time at no addi­tional cost. This won’t be the answer for every­one of course – some peo­ple will already have a rel­a­tively mod­ern boiler installed, in which case it will be far most cost effec­tive just to pay for the exten­sion of the flue.

All our EWI systems come with a 25 year warranty!

11 05/15
All our EWI systems come with a 25 year warranty!

Why we can offer a 25-year guarantee on our solid wall insulation

25 years seems an awfully long time for a war­ranty – espe­cially when the prod­uct in ques­tion sits out­side all day and gets ham­mered by the ele­ments – so why then can we do it on our solid wall insu­la­tion sys­tems?

Well firstly the qual­ity of the mate­ri­als we use – we source all our mate­ri­als from EWI STORE , which is one of the top sell­ing solid wall insu­la­tion brands across  UK

By using one sin­gle solid wall insu­la­tion sys­tem, we never have to mix and match dif­fer­ent ele­ments to pro­duce a hybrid mis­matched sys­tem! The ele­ments have been pro­duced and designed to work in per­fect har­mony together ensur­ing once installed they stand the test of time.


The other rea­son we feel so con­fi­dent in our solid wall insu­la­tion sys­tem is based on the way it is attached to the wall. The sys­tem is attached in three ways:

  1. With a con­crete adhe­sive
  2. Mechan­i­cal dow­els
  3. A rein­force­ment mesh layer

These three fix­ings ensure that the solid wall insu­la­tion is going absolutely nowhere from the wall it was installed in!

If you think that your wall might take a bit of bat­ter­ing (from a young foot­balling prodigy for exam­ple!) we can even pro­vide an addi­tional layer of rein­force­ment mesh, which means the sys­tem can with­stand over 10 kJ of force.

For more infor­ma­tion on any of our solid wall insu­la­tion sys­tems

Call us now on 0208 144 0897!


Why 50mm of External Solid Wall Insulation?

06 05/15
Why 50mm of External Solid Wall Insulation is Just Not Enough

Why 50mm of External Solid Wall Insulation is Just Not Enough

As you can imag­ine, we get a huge amount of inter­est in solid wall insu­la­tion, espe­cially since the launch of the Gov­ern­ment GDHIF scheme which pro­vides gen­er­ous grants to help cover the cost of the works (up to 67% of the total cost!).

What peo­ple are often sur­prised to find out when they get in touch with us is that we rec­om­mend installing 100mm of insu­la­tion to the wall. Many peo­ple assume that 50mm or less will be more than suf­fi­cient to lower their energy bills.

Well in a way they are cor­rect – it will lower their bills, how­ever we are about to show you why 50mm is never enough!

Why not just insulate with 50mm of insulation?

Using 50mm of EPS insu­la­tion does improve the U-Value a huge amount – as a reminder the the U-value is sim­ply a mea­sure of heat loss through the an object, the lower the value the bet­ter in terms of ther­mal effi­ciency.

Solid brick walls have a U-value of around 2.1-3W/m² and adding 50mm of expanded poly­styrene (EPS) with take the U-value down to 0.5W/m²k, which is a sub­stan­tial improve­ment, but 100mm takes it down to just 0.27W/m2k.

A new cav­ity wall built today must be built to a u-value of 0.3W/m2k which means if you ret­ro­spec­tively add just 50mm of EPS insu­la­tion it won’t be suf­fi­cient to adhere to build­ing reg­u­la­tions. If 25% of the exter­nal wall is being insu­lated you MUST adhere to build­ing reg­u­la­tions, there­fore you are legally obliged to go for this larger thick­ness. In addi­tion, if insu­la­tion is being installed under the GDHIF scheme, then it must adhere to build­ing regs, so if some­one has installed 50mm of insu­la­tion on your home it is worth get­ting in touch of them to make sure they come and do it cor­rectly!!