A burner cover insulation device for shielding a cover plate from heat produced by a boiler burner, the device comprising: - a cover layer comprising a heat resistant inorganic fibrous material and having a first outer peripheral edge, - a support layer providing mechanical strength to the device and having a second outer peripheral edge that at least extends to the outer peripheral edge of the cover layer, and - a filling material forming an insulating layer (104, 104') between the cover layer and the support layer, wherein a through hole extends through the cover layer and the support layer thereby forming a first inner peripheral edge of the cover layer and a second inner peripheral edge of the support layer, wherein the cover layer and the support layer are connected along at least part of the first outer peripheral edge of the cover layer and at least part of the second inner peripheral edge of the support layer; and, wherein the insulating layer (104, 104') has a third outer peripheral edge and a third inner peripheral edge, the insulating layer extending from the first inner peripheral edge of the cover layer to the first outer peripheral edge of the cover layer, and wherein the through hole is delimited by the first and third inner peripheral edges (109, 113) of the cover layer and the insulating layer, respectively. - a cover layer comprising a heat resistant inorganic fibrous material and having a first outer peripheral edge, - a support layer providing mechanical strength to the device and having a second outer peripheral edge that at least extends to the outer peripheral edge of the cover layer, and - a filling material forming an insulating layer (104, 104') between the cover layer and the support layer, wherein a through hole extends through the cover layer and the support layer thereby forming a first inner peripheral edge of the cover layer and a second inner peripheral edge of the support layer, wherein the cover layer and the support layer are connected along at least part of the first outer peripheral edge of the cover layer and at least part of the second inner peripheral edge of the support layer; and, wherein the insulating layer (104, 104') has a third outer peripheral edge and a third inner peripheral edge, the insulating layer extending from the first inner peripheral edge of the cover layer to the first outer peripheral edge of the cover layer, and wherein the through hole is delimited by the first and third inner peripheral edges (109, 113) of the cover layer and the insulating layer, respectively. wherein a through hole extends through the cover layer and the support layer thereby forming a first inner peripheral edge of the cover layer and a second inner peripheral edge of the support layer, wherein the cover layer and the support layer are connected along at least part of the first outer peripheral edge of the cover layer and at least part of the second inner peripheral edge of the support layer; and, wherein the insulating layer (104, 104') has a third outer peripheral edge and a third inner peripheral edge, the insulating layer extending from the first inner peripheral edge of the cover layer to the first outer peripheral edge of the cover layer, and wherein the through hole is delimited by the first and third inner peripheral edges (109, 113) of the cover layer and the insulating layer, respectively.