If the slope of your dormer roof is the same as your old roof hold a scrap of plywood against the old roof boards and draw a level line on it.
Free dormer roof insulation.
Roof and loft insulation is by usually the most efficient measure as it s typically the cheapest to install and has the greatest effect.
How to insulate a dormer roof when making for changes to a dwelling or when constructing a new dwelling it must comply with the current building regulations when altering the insulation in a dormer part l of the building regulations must be adhered to.
Long ago i added a lot of insulation to the accessable attic area and put a radiant barrier sheet under the roof joists.
When the roof was snow and ice covered that part of the roof would melt faster causing water to pond which was then wicked up by the dormer structure.
Some key points of the building regulations are.
Make a rafter cutting jig by measuring 12 in.
The maximum elemental u value of your roof must not exceed 0 16 w m2 k.
Because there was no dormer insulation interior heat kept that part of the roof warm.
This was the cause of the long standing interior moisture issues.
Reduce your heating bills by up to 1000 over 3 years.
About 25 of heat is lost through the roof of poorly insulated properties as heat rises.
Insulate with 100mm kingspan between joists and 50mm below joists.
On the main part of the roof i ll have snow for as much as a week after the other units have had all theirs melted off so at least on that part i m fairly well.
Cross battens to roof joists and side fascia boards to be packed of 12mm or ventilated soffit strip.
Now that you are all set to upgrade the insulation of your dormer roof these 3 key considerations are well worth bearing in mind.
I have a couple of dormers on each side of a mansard roof.
Dormer roof insulation grants dormer roof insulation funding available to all anyone with a dormer room automatically qualifies for a minimum grant of 1100 00 towards the cost of fully insulating the dormer room to bring it up to current day standards.