FAQ about ISUM 

Appro­pria­te ans­wers to fre­quent­ly asked ques­ti­ons about our insulation:

Are spe­cial tech­ni­ques to be used when instal­ling ISUM MF14 (M)?

No! ISUM MF14 (M) is very easy to install and does not requi­re any spe­cial tech­ni­cal pro­ce­du­res. It is only important to use rust­pro­of stap­les (stap­le depth of min. 14 mm) when stap­ling or using appro­pria­te roofing felt nails. The alu­mi­ni­um adhe­si­ve tape to be used to seal the over­lap can be orde­red from ISUM.

What secu­ri­ties do I have as a pro­fes­sio­nal buil­der? Is the­re an insurance?

The­re is a coverage of legal lia­bi­li­ty as well as an exten­ded pro­duct and eco­lo­gi­cal lia­bi­li­ty insuran­ce with an exten­ded war­ran­ty peri­od. A copy of the poli­cy can be sent on request.

Can ISUM M14 be used for ther­mal insu­la­ti­on of facades?

Taking into account all fire pro­tec­tion requi­re­ments for curtain walls, ISUM M14 can be used for the ther­mal insu­la­ti­on of a faça­de. As with over-raf­ter insu­la­ti­on, ISUM M14 requi­res an air lay­er on both sides to ensu­re the degree of heat reflec­tion of up to 96% and, when instal­led, counts as part of a curtain wall. The cor­re­spon­ding fire pro­tec­tion requi­re­ments are clear­ly defi­ned in the buil­ding regu­la­ti­ons (LBO), spe­cial buil­ding regu­la­ti­ons and gui­de­li­nes. In addi­ti­on, depen­ding on the size of the buil­ding, use and equip­ment, fur­ther gui­de­li­nes and regu­la­ti­ons must be obser­ved. Nor­mal­ly flamm­a­ble exter­nal wall clad­ding (e.g. woo­den faca­des) may be used on most buil­dings up to 7 m high. Howe­ver, for buil­dings of average height of 7 to 22 m, at least fla­me-retar­dant faça­de clad­dings are requi­red. Only non-flamm­a­ble mate­ri­als must be used in high-rise buil­dings. Most federal sta­tes requi­re a per­mit for curtain walls, and design regu­la­ti­ons may app­ly in indi­vi­du­al cases of exter­nal buil­ding alte­ra­ti­ons. A buil­ding pro­ject can only be appro­ved if it com­plies with both buil­ding plan­ning and buil­ding regu­la­ti­ons (this may also inclu­de a fire pro­tec­tion cer­ti­fi­ca­te) and if all rele­vant public legal pro­vi­si­ons are com­plied with. If ISUM is to be used in a curtain wall, the manufacturer’s tech­ni­cal advi­ser and the rele­vant buil­ding super­vi­so­ry aut­ho­ri­ty should be consulted.

How is the ther­mal insu­la­ti­on effect in the mate­ri­al com­po­si­te? Are the­re any cal­cu­la­ti­on tools?

Built-in buil­ding mate­ri­als, inclu­ding the cavi­ties with still air, have insu­la­ting pro­per­ties. To deter­mi­ne the insu­la­ting effect of a com­po­si­te mate­ri­al, a cal­cu­la­ti­on tool is requi­red in which buil­ding mate­ri­als are lis­ted indi­vi­du­al­ly with their pro­per­ties. For this pur­po­se, we recom­mend the Hott­gen­roth pro­gram, which has alrea­dy pro­ven its­elf on the mar­ket for archi­tects, plan­ners and ener­gy con­sul­tants. In this sen­se, almost all buil­ding mate­ri­als are addi­tio­nal insu­la­ti­on mate­ri­als, this app­lies to MF 14 and MF 14 M.

Can ISUM MF14 be used with other insu­la­ti­on materials?

Yes, it can be used and com­bi­ned with all insu­la­ti­on mate­ri­als fami­li­ar to us. Espe­cial­ly when reno­vat­ing, the old insu­la­ti­on does not need to be remo­ved if it is not damaged.

How can you achie­ve the high effi­ci­en­cy with only approx. 10 mm thickness?

ISUM pro­ducts are pre­fer­a­b­ly based on the laws of ther­mal radia­ti­on: they block heat trans­mis­si­on by reflec­tion. For this rea­son, the decisi­ve cha­rac­te­ris­tic of their effec­ti­ve­ness is the reflec­tion effect and not the thic­kness of the material.

Would I get twice the effect with two lay­ers of your insu­la­ti­on material?

Our insu­la­ti­on pro­ducts reflect radi­ant heat and have less effect through their ther­mal con­duc­ti­vi­ty. Pro­ducts that act on the basis of their ther­mal con­duc­ti­vi­ty incre­a­se their results by doub­ling their strength. Our pro­ducts unfold their effect through the reflec­ti­ve pro­per­ties of their sur­face. The­re­fo­re, using two lay­ers direct­ly on top of one ano­t­her would impro­ve the result but not dou­ble it. (The­re is no line­ar impro­ve­ment for any material).

When do we speak of the cold or warm side?

The cold side is on the out­side. In ISUM, for examp­le, the outer wall/facade or on the raf­ters of a roof con­struc­tion. App­li­ca­ti­on MF14 M (with micropores).

The warm side (hea­ted) is insi­de. In ISUM MF14, for examp­le, the insi­de wall or under the raf­ter of a roof con­struc­tion. App­li­ca­ti­on MF14 (sea­led version).

Is it necessa­ry to use a nail sealing tape?

The gui­de­li­nes of the roofing fede­ra­ti­on pre­scri­be the use of nail sealing tape for the fixing points of a sin­gle-lay­er film. ISUM is a com­po­si­te of 14 lay­ers, six of which are elastic and her­me­ti­cal­ly seal the nail or stap­le points. The use of nail tape is not necessary.

Why should I use alu­mi­ni­um adhe­si­ve tape?

The alu­mi­ni­um adhe­si­ve tape leads to a uni­form mate­ri­al cover and pre­vents / redu­ces ther­mal brid­ges that would other­wi­se impair the over­all insu­la­ti­on effect. It also pre­vents the ingress of water and the for­ma­ti­on of air leaka­ge and also crea­tes dor­mant air spaces.

Why are the­re two ISUM MF14 versions?

ISUM MF14 can be affi­xed to the insi­de (warm side) as well as out­side (cold side). On the insi­de, for examp­le, it can be instal­led under the raf­ter, whe­re a dif­fu­si­on-impe­ding (vapor bar­ri­er) ther­mal insu­la­ti­on mat is requi­red. The seams must be sea­led with ISUM adhe­si­ve tape. On the out­side, for examp­le, a dif­fu­si­ble heat insu­la­ti­on mat is to be atta­ched to the raf­ter. ISUM MF14M has micro per­fo­ra­ti­ons and is the­re­fo­re diffusible.

Why does ISUM MF14 need to be angled up and down at the points whe­re it meets the wall?

The width of the strip of insu­la­ti­on mate­ri­al bent up and down at the points of con­ta­ct with the wall should be of suf­fi­ci­ent width (e.g. that of the bat­tens) to form an effec­ti­ve seal.

Why is it important to lea­ve air spaces on both sides of the insu­la­ting interlayer?

Cavi­ties are important becau­se the mode of action of ISUM is main­ly based on the reflec­tion of heat and can­not deve­lop opti­mal­ly without air spaces. It should be noted that sta­tic air spaces are crea­ted to pre­vent con­vec­tion (air movements).

What do I need to affix the product?

All you need to fix our pro­duct is a stap­ler with alu­mi­ni­um stap­les or roofing felt nails to attach ISUM MF14 to the woo­den bat­tens or raf­ters. We also stron­gly recom­mend the use of alu­mi­ni­um adhe­si­ve tape to secu­re­ly fix the she­ets that slight­ly over­lap at their edges (5 cm seam on seam). In addi­ti­on, all open inter­faces must be sea­led with the alu­mi­ni­um adhe­si­ve tape.

How are the pro­ducts installed?

You will find short descrip­ti­ons of this on our web­site under the hea­ding “Pro­ces­sing”. Should you requi­re fur­ther infor­ma­ti­on, plea­se con­ta­ct us. You can find the rele­vant con­ta­ct details on the “Con­ta­cts” page — we will be hap­py to assist you. You can request detail­ed instal­la­ti­on inst­ruc­tions from us.

Can ISUM MF14 also be used on plas­ter­board walls?

Yes, it can also be used on plas­ter­board walls without any problem.

Why should­n’t I mount ISUM MF14 direct­ly on a wall?

The high ther­mal insu­la­ti­on effect of our pro­duct is achie­ved by the fact that heat and cold are reflec­ted by the alu­mi­ni­um lay­ers. In order to ensu­re an opti­mal reflec­tion effect, hollow/interspaces are requi­red; other­wi­se only heat dis­si­pa­ti­on would be achieved.

Is it necessa­ry to use a water­pro­of pro­tec­ti­ve film in addi­ti­on when app­ly­ing to the roof?

Alu­mi­ni­um is water­pro­of; howe­ver, the seams that sta­bi­li­se the struc­tu­re of the dif­fe­rent lay­ers of ISUM MF14 could allow a small amount of mois­tu­re to pene­tra­te. This effect of the capil­la­ry action of the yarns is deli­be­ra­te to pre­vent mois­tu­re accu­mu­la­ti­on in the cavities.

An addi­tio­nal under deck/sarking mem­bra­ne can be added to maxi­mi­se safety.

On con­struc­tion sites that are open to the out­side, a pro­tec­ti­ve tar­pau­lin must be atta­ched to pro­tect against hea­vy rain / wind. Sacks must be avoided.

Who gua­ran­tees the high qua­li­ty of ISUM?

The pro­ducts manu­fac­tu­red at Finck & Co Papier und Foli­en­werk are sub­ject to strict qua­li­ty control:

  • Inco­m­ing raw mate­ri­als are checked
  • Dai­ly pro­duc­tion moni­to­ring accord­ing to EN 822 and EN 823 (length/width)
  • Wee­kly pro­duc­tion review of the fire beha­viour at a sta­te-appro­ved test cent­re accord­ing to EN 11925–2
  • Regu­lar qua­li­ty con­trol accord­ing to the DIBt spe­ci­fi­ca­ti­ons, car­ri­ed out by the Fraun­ho­fer Insti­tu­te for Buil­ding Phy­sics IBP, Stuttgart.

Is ISUM patented?

Yes, the Euro­pean Patent Office has alrea­dy gran­ted the patent on 28 July 2016 under the refe­rence num­ber 2 705 198.

The Ger­man Patent Office gran­ted the patent on 19.12.2019 under file num­ber 10 2011 075 374.