EXTERNAL WALL INSULATION FOR SHEFFIELD
Installing the base rails
EWI STARTER TRACK
The track is what holds the insulation boards level and are fitted above the damp proof course, this is what protects the bottom of the system
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ADHESIVE AND MECHANICAL FIX
The correct way to install EWI boards is to adhesive fix the boards, adhesive is required around the perimeter of every insulation board which helps to get the wall completely flat and are attached in brick bond formation. Around doors and windows they are all interlocked at the corners to stop any cracking. After 24 hours we then mechanically fix them together which is a nail fixing or screw dependent upon the specified system we are applying.
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BEADING AND STRESS PATCHES ​
Once the boards are fitted, next we prepare all the doors and windows with a mesh beading which is adhesively fixed into place. Stress patches are fibre mesh cut into squares, this is placed over every overlap around the doors and windows which strengthens and stops cracking.
BASECOAT AND REINFORCED FIBRE MESH
The base coat is made up of two passes of render and typically to the thickness of 6mm,with a fibre mesh embedded into the render and sits just underneath the surface.
SILICONE THIN COAT
Once the basecoat has dried its then finished with a silicone primer, the thin coat render is then applied. The silicone comes in different aggregates from 0.5mm to 3mm, there are several finishes with different prices, there is acrylic, ,silicone and full silicone with all the major brands offering this.
MANUFACTURERS WARRANTY
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On every EWI system we have a specification from the manufacturer to follow, we send pictures and detailed information of the installation. We are a registered installer to all the brands we use to get the manufacturers warranty's.
EWI BENEFITS
I have put together some benefits of having EWI applied.
Improved thermal EV performance
Helps with condensation and damp
Reduces energy bills
Adds value to the property
Experience cooler summers and warmer winters
Improvement to external aesthetics
Reduces carbon footprint
Acoustic insulation and is fire resistance.
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I will organise for your property to be surveyed to make sure we get the correct system for your property.
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The system depends on your own requirements and the property its self, with things such as the insulant EPS boards or mineral wool, with the thickness required for your property, it can be applied with overhangs of the roofline windowsills depth. Fall pipes need taking into consideration and then there's the texture and colours to your personal choice to ensure it looks exactly how you want it.
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OUR CHECKLIST
Condition of the existing walls, sometimes a pull test is needed to make sure we can mechanically fix the fixings.
Doors and windows reveals, checking for any issues.
Roof overhang sills, overhang doors and widows etc
Fall pipes and soil stacks might need replacing,
satellite dish's and gas boxes, and gates may need to be taken off
Checking on the condition of the walls so that the boards will adhere to them.
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HOW LONG WILL EWI LAST
Most of the rendering companies we use will come with a 10 to 15 year warranty.
Whilst the render is low maintenance it may require a light jet wash every now and again, this is to keep it dirt free and keep the render in good shape.
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